Index: services/Makefile
===================================================================
--- services/Makefile	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
+++ services/Makefile	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
@@ -0,0 +1,11 @@
+#
+#  $Id$
+#
+
+include ../config.inc
+
+include $(RTEMS_MAKEFILE_PATH)/Makefile.inc
+include $(RTEMS_CUSTOM)
+include $(RTEMS_SHARE)/make/directory.cfg
+
+SUBDIRS=mghttpd
Index: services/mghttpd/Makefile
===================================================================
--- services/mghttpd/Makefile	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
+++ services/mghttpd/Makefile	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
@@ -0,0 +1,39 @@
+include ../../config.inc
+
+include $(RTEMS_MAKEFILE_PATH)/Makefile.inc
+include $(RTEMS_CUSTOM)
+include $(PROJECT_ROOT)/make/leaf.cfg
+
+CFLAGS += -I $(INSTALL_BASE)/include
+
+CFLAGS += -w 
+CFLAGS += -std=gnu99
+CFLAGS += -MT $@ -MD -MP -MF $(basename $@).d
+# CFLAGS += -DHAVE_MD5
+CFLAGS += -DNO_SSL -DNO_POPEN -DNO_CGI
+
+C_FILES =
+C_FILES += mongoose.c
+
+C_O_FILES = $(C_FILES:%.c=%.o)
+C_D_FILES = $(C_FILES:%.c=%.d)
+
+LIB = libmghttpd.a
+
+all: $(LIB)
+
+$(LIB): $(C_O_FILES)
+	$(AR) rcu $@ $^
+
+install: $(LIB)
+	install -d $(INSTALL_BASE)/include
+	install -c -m 644 mongoose.h $(INSTALL_BASE)
+	install -c -m 644 $(LIB) $(INSTALL_BASE)
+
+clean:
+	rm -f $(LIB) $(C_O_FILES) $(C_D_FILES) $(GEN_FILES)
+
+-include $(C_D_FILES)
+
+doc: 
+
Index: services/mghttpd/mongoose.1
===================================================================
--- services/mghttpd/mongoose.1	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
+++ services/mghttpd/mongoose.1	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
@@ -0,0 +1,183 @@
+.\" Process this file with
+.\" groff -man -Tascii mongoose.1
+.\" $Id: mongoose.1,v 1.12 2008/11/29 15:32:42 drozd Exp $
+.Dd Aug 31, 2010
+.Dt mongoose 1
+.Sh NAME
+.Nm mongoose
+.Nd lightweight web server
+.Sh SYNOPSIS
+.Nm
+.Op Ar config_file
+.Op Ar OPTIONS
+.Nm
+.Fl A Ar htpasswd_file domain_name user_name password
+.Sh DESCRIPTION
+.Nm
+is small, fast and easy to use web server with CGI, SSL, MD5 authorization,
+and basic SSI support.
+.Pp
+.Nm
+does not detach from terminal, and uses current working directory
+as the web root, unless
+.Fl r
+option is specified.
+It is possible to specify multiple ports to listen on. For example, to make
+mongoose listen on HTTP port 80 and HTTPS port 443, one should start it as:
+.Nm
+.Fl s Ar cert.pem Fl p Ar 80,443s
+.Pp
+Unlike other web servers,
+.Nm
+does not require CGI scripts be put in a special directory. CGI scripts can
+be anywhere. CGI (and SSI) files are recognized by the file name pattern.
+.Nm
+uses shell-like glob patterns with the following syntax:
+.Bl -tag -compact -width indent
+.It **
+Matches everything
+.It *
+Matches everything but slash character, '/'
+.It ?
+Matches any character
+.It $
+Matches the end of the string
+.It |
+Matches if pattern on the left side or the right side matches. Pattern on the
+left side is matched first
+.El
+All other characters in the pattern match themselves.
+.Pp
+If no arguments are given,
+.Nm
+searches for a configuration file called "mongoose.conf" in the same directory
+where mongoose binary is located. Alternatively, a file name could be
+specified in the command line. Format of the configuration file is the same
+as for the command line options except that each option must be specified
+on a separate line, leading dashes for option names must be omitted.
+Lines beginning with '#' and empty lines are ignored.
+.Pp
+.Sh OPTIONS
+.Bl -tag -width indent
+.It Fl A Ar htpasswd_file domain_name user_name password
+Add/edit user's password in the passwords file. Deleting users can be done
+with any text editor. Functionality is similar to Apache's
+.Ic htdigest
+utility.
+.It Fl C Ar cgi_pattern
+All files that fully match cgi_pattern are treated as CGI.
+Default pattern allows CGI files be
+anywhere. To restrict CGIs to certain directory, use e.g. "-C /cgi-bin/**.cgi".
+Default: "**.cgi$|**.pl$|**.php$"
+.It Fl E Ar cgi_environment
+Extra environment variables to be passed to the CGI script in addition to
+standard ones. The list must be comma-separated list of X=Y pairs, like this:
+"VARIABLE1=VALUE1,VARIABLE2=VALUE2". Default: ""
+.It Fl G Ar put_delete_passwords_file
+PUT and DELETE passwords file. This must be specified if PUT or
+DELETE methods are used. Default: ""
+.It Fl I Ar cgi_interpreter
+Use
+.Ar cgi_interpreter
+as a CGI interpreter for all CGI scripts regardless script extension.
+Mongoose decides which interpreter to use by looking at
+the first line of a CGI script.  Default: "".
+.It Fl M Ar max_request_size
+Maximum HTTP request size in bytes. Default: "16384"
+.It Fl P Ar protect_uri
+Comma separated list of URI=PATH pairs, specifying that given URIs
+must be protected with respected password files. Default: ""
+.It Fl R Ar authentication_domain
+Authorization realm. Default: "mydomain.com"
+.It Fl S Ar ssi_pattern
+All files that fully match ssi_pattern are treated as SSI.
+Unknown SSI directives are silently ignored. Currently, two SSI directives
+are supported, "include" and "exec".  Default: "**.shtml$|**.shtm$"
+.It Fl a Ar access_log_file
+Access log file. Default: "", no logging is done.
+.It Fl d Ar enable_directory_listing
+Enable/disable directory listing. Default: "yes"
+.It Fl e Ar error_log_file
+Error log file. Default: "", no errors are logged.
+.It Fl g Ar global_passwords_file
+Location of a global passwords file. If set, per-directory .htpasswd files are
+ignored, and all requests must be authorised against that file.  Default: ""
+.It Fl i Ar index_files
+Comma-separated list of files to be treated as directory index files.
+Default: "index.html,index.htm,index.cgi"
+.It Fl l Ar access_control_list
+Specify access control list (ACL). ACL is a comma separated list
+of IP subnets, each subnet is prepended by '-' or '+' sign. Plus means allow,
+minus means deny. If subnet mask is
+omitted, like "-1.2.3.4", then it means single IP address. Mask may vary
+from 0 to 32 inclusive. On each request, full list is traversed, and
+last match wins. Default setting is to allow all. For example, to allow only
+192.168/16 subnet to connect, run "mongoose -0.0.0.0/0,+192.168/16".
+Default: ""
+.It Fl m Ar extra_mime_types
+Extra mime types to recognize, in form
+"extension1=type1,extension2=type2,...". Extension must include dot.
+Example: "mongoose -m .cpp=plain/text,.java=plain/text". Default: ""
+.It Fl p Ar listening_ports
+Comma-separated list of ports to listen on. If the port is SSL, a letter 's'
+must be appeneded, for example, "-p 80,443s" will open port 80 and port 443,
+and connections on port 443 will be SSL-ed. It is possible to specify an
+IP address to bind to. In this case, an IP address and a colon must be
+prepended to the port number. For example, to bind to a loopback interface
+on port 80 and to all interfaces on HTTPS port 443, use
+"mongoose -p 127.0.0.1:80,443s". Default: "8080"
+.It Fl r Ar document_root
+Location of the WWW root directory. Default: "."
+.It Fl s Ar ssl_certificate
+Location of SSL certificate file. Default: ""
+.It Fl t Ar num_threads
+Number of worker threads to start. Default: "10"
+.It Fl u Ar run_as_user
+Switch to given user's credentials after startup. Default: ""
+.It Fl w Ar url_rewrite_patterns
+Comma-separated list of URL rewrites in the form of
+"pattern=substitution,..." If the "pattern" matches some prefix
+of the requested URL, then matched prefix gets substituted with "substitution".
+For example, "-w /config=/etc,**.doc|**.rtf=/path/to/cgi-bin/handle_doc.cgi"
+will serve all URLs that start with "/config" from the "/etc" directory, and
+call handle_doc.cgi script for .doc and .rtf file requests. If some pattern
+matches, no further matching/substitution is performed
+(first matching pattern wins). Use full paths in substitutions. Default: ""
+.It Fl x Ar thread_stack_size
+Use the given amount of stack for each thread. Default: ""
+.It Fl y Ar thread_priority
+Use the given priority for all posix threads. If this option is used without the
+thread_policy option, the systems default scheduling policy will be used for the
+threads instead of inheriting the policy of the creating thread. Default: ""
+.It Fl z Ar thread_policy
+Select the posix scheduling policy for the threads.  Possible Values are 's' for
+sporadic (not on all systems available), 'r' for round robin, 'f' for fifo or
+'o' for other scheduling strategie. If this option is used without the
+thread_priority option, the systems default priority will be used for the
+threads instead of inheriting the priority of the creating thread. Default: ""
+.El
+.Pp
+.Sh EMBEDDING
+.Nm
+was designed to be embeddable into C/C++ applications. Since the
+source code is contained in single C file, it is fairly easy to embed it
+and follow the updates. Please refer to http://code.google.com/p/mongoose
+for details.
+.Pp
+.Sh EXAMPLES
+.Bl -tag -width indent
+.It Nm Fl r Ar /var/www Fl s Ar /etc/cert.pem Fl p Ar 8080,8043s
+Start serving files from /var/www. Listen on port 8080 for HTTP, and 8043
+for HTTPS connections.  Use /etc/cert.pem as SSL certificate file.
+.It Nm Fl l Ar -0.0.0.0/0,+10.0.0.0/8,+1.2.3.4
+Deny connections from everywhere, allow only IP address 1.2.3.4 and
+all IP addresses from 10.0.0.0/8 subnet to connect.
+.It Nm Fl w Ar **=/usr/bin/script.cgi
+Invoke /usr/bin/script.cgi for every incoming request, regardless of the URL.
+.El
+.Pp
+.Sh COPYRIGHT
+.Nm
+is licensed under the terms of the MIT license.
+.Sh AUTHOR
+.An Sergey Lyubka Aq valenok@gmail.com .
Index: services/mghttpd/mongoose.c
===================================================================
--- services/mghttpd/mongoose.c	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
+++ services/mghttpd/mongoose.c	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
@@ -0,0 +1,4317 @@
+// Copyright (c) 2004-2011 Sergey Lyubka
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#if defined(__rtems__)
+#include <md5.h>
+#define HAVE_MD5
+#endif // __rtems__
+
+#if defined(_WIN32)
+#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005
+#else
+#define _XOPEN_SOURCE 600     // For flockfile() on Linux
+#define _LARGEFILE_SOURCE     // Enable 64-bit file offsets
+#define __STDC_FORMAT_MACROS  // <inttypes.h> wants this for C++
+#define __STDC_LIMIT_MACROS   // C++ wants that for INT64_MAX
+#endif
+
+#if defined(__SYMBIAN32__)
+#define NO_SSL // SSL is not supported
+#define NO_CGI // CGI is not supported
+#define PATH_MAX FILENAME_MAX
+#endif // __SYMBIAN32__
+
+#ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#endif // !_WIN32_WCE
+
+#include <time.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific
+#define _WIN32_WINNT 0x0400 // To make it link in VS2005
+#include <windows.h>
+
+#ifndef PATH_MAX
+#define PATH_MAX MAX_PATH
+#endif
+
+#ifndef _WIN32_WCE
+#include <process.h>
+#include <direct.h>
+#include <io.h>
+#else // _WIN32_WCE
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#define NO_CGI // WinCE has no pipes
+
+typedef long off_t;
+#define BUFSIZ  4096
+
+#define errno   GetLastError()
+#define strerror(x)  _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
+#endif // _WIN32_WCE
+
+#define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
+      ((uint64_t)((uint32_t)(hi))) << 32))
+#define RATE_DIFF 10000000 // 100 nsecs
+#define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
+#define SYS2UNIX_TIME(lo, hi) \
+  (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
+
+// Visual Studio 6 does not know __func__ or __FUNCTION__
+// The rest of MS compilers use __FUNCTION__, not C99 __func__
+// Also use _strtoui64 on modern M$ compilers
+#if defined(_MSC_VER) && _MSC_VER < 1300
+#define STRX(x) #x
+#define STR(x) STRX(x)
+#define __func__ "line " STR(__LINE__)
+#define strtoull(x, y, z) strtoul(x, y, z)
+#define strtoll(x, y, z) strtol(x, y, z)
+#else
+#define __func__  __FUNCTION__
+#define strtoull(x, y, z) _strtoui64(x, y, z)
+#define strtoll(x, y, z) _strtoi64(x, y, z)
+#endif // _MSC_VER
+
+#define ERRNO   GetLastError()
+#define NO_SOCKLEN_T
+#define SSL_LIB   "ssleay32.dll"
+#define CRYPTO_LIB  "libeay32.dll"
+#define DIRSEP '\\'
+#define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\')
+#define O_NONBLOCK  0
+#if !defined(EWOULDBLOCK)
+#define EWOULDBLOCK  WSAEWOULDBLOCK
+#endif // !EWOULDBLOCK
+#define _POSIX_
+#define INT64_FMT  "I64d"
+
+#define WINCDECL __cdecl
+#define SHUT_WR 1
+#define snprintf _snprintf
+#define vsnprintf _vsnprintf
+#define mg_sleep(x) Sleep(x)
+
+#define pipe(x) _pipe(x, BUFSIZ, _O_BINARY)
+#define popen(x, y) _popen(x, y)
+#define pclose(x) _pclose(x)
+#define close(x) _close(x)
+#define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
+#define RTLD_LAZY  0
+#define fseeko(x, y, z) fseek((x), (y), (z))
+#define fdopen(x, y) _fdopen((x), (y))
+#define write(x, y, z) _write((x), (y), (unsigned) z)
+#define read(x, y, z) _read((x), (y), (unsigned) z)
+#define flockfile(x) EnterCriticalSection(&global_log_file_lock)
+#define funlockfile(x) LeaveCriticalSection(&global_log_file_lock)
+
+#if !defined(fileno)
+#define fileno(x) _fileno(x)
+#endif // !fileno MINGW #defines fileno
+
+typedef HANDLE pthread_mutex_t;
+typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
+typedef DWORD pthread_t;
+#define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
+
+struct timespec {
+  long tv_nsec;
+  long tv_sec;
+};
+
+static int pthread_mutex_lock(pthread_mutex_t *);
+static int pthread_mutex_unlock(pthread_mutex_t *);
+static FILE *mg_fopen(const char *path, const char *mode);
+
+#if defined(HAVE_STDINT)
+#include <stdint.h>
+#else
+typedef unsigned int  uint32_t;
+typedef unsigned short  uint16_t;
+typedef unsigned __int64 uint64_t;
+typedef __int64   int64_t;
+#define INT64_MAX  9223372036854775807
+#endif // HAVE_STDINT
+
+// POSIX dirent interface
+struct dirent {
+  char d_name[PATH_MAX];
+};
+
+typedef struct DIR {
+  HANDLE   handle;
+  WIN32_FIND_DATAW info;
+  struct dirent  result;
+} DIR;
+
+#else    // UNIX  specific
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/time.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <netdb.h>
+
+#include <pwd.h>
+#include <unistd.h>
+#include <dirent.h>
+#if !defined(NO_SSL_DL) && !defined(NO_SSL)
+#include <dlfcn.h>
+#endif
+#include <pthread.h>
+#if defined(__MACH__)
+#define SSL_LIB   "libssl.dylib"
+#define CRYPTO_LIB  "libcrypto.dylib"
+#else
+#if !defined(SSL_LIB)
+#define SSL_LIB   "libssl.so"
+#endif
+#if !defined(CRYPTO_LIB)
+#define CRYPTO_LIB  "libcrypto.so"
+#endif
+#endif
+#define DIRSEP   '/'
+#define IS_DIRSEP_CHAR(c) ((c) == '/')
+#ifndef O_BINARY
+#define O_BINARY  0
+#endif // O_BINARY
+#define closesocket(a) close(a)
+#define mg_fopen(x, y) fopen(x, y)
+#define mg_mkdir(x, y) mkdir(x, y)
+#define mg_remove(x) remove(x)
+#define mg_rename(x, y) rename(x, y)
+#define mg_sleep(x) usleep((x) * 1000)
+#define ERRNO errno
+#define INVALID_SOCKET (-1)
+#define INT64_FMT PRId64
+typedef int SOCKET;
+#define WINCDECL
+
+#endif // End of Windows and UNIX specific includes
+
+#include "mongoose.h"
+
+#define MONGOOSE_VERSION "3.2"
+#define PASSWORDS_FILE_NAME ".htpasswd"
+#define CGI_ENVIRONMENT_SIZE 4096
+#define MAX_CGI_ENVIR_VARS 64
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
+
+#ifdef _WIN32
+static CRITICAL_SECTION global_log_file_lock;
+static pthread_t pthread_self(void) {
+  return GetCurrentThreadId();
+}
+#endif // _WIN32
+
+#if defined(DEBUG)
+#define DEBUG_TRACE(x) do { \
+  flockfile(stdout); \
+  printf("*** %lu.%p.%s.%d: ", \
+         (unsigned long) time(NULL), (void *) pthread_self(), \
+         __func__, __LINE__); \
+  printf x; \
+  putchar('\n'); \
+  fflush(stdout); \
+  funlockfile(stdout); \
+} while (0)
+#else
+#define DEBUG_TRACE(x)
+#endif // DEBUG
+
+// Darwin prior to 7.0 and Win32 do not have socklen_t
+#ifdef NO_SOCKLEN_T
+typedef int socklen_t;
+#endif // NO_SOCKLEN_T
+
+#if !defined(MSG_NOSIGNAL)
+#define MSG_NOSIGNAL 0
+#endif
+
+typedef void * (*mg_thread_func_t)(void *);
+
+static const char *http_500_error = "Internal Server Error";
+
+// Snatched from OpenSSL includes. I put the prototypes here to be independent
+// from the OpenSSL source installation. Having this, mongoose + SSL can be
+// built on any system with binary SSL libraries installed.
+typedef struct ssl_st SSL;
+typedef struct ssl_method_st SSL_METHOD;
+typedef struct ssl_ctx_st SSL_CTX;
+
+#define SSL_ERROR_WANT_READ 2
+#define SSL_ERROR_WANT_WRITE 3
+#define SSL_FILETYPE_PEM 1
+#define CRYPTO_LOCK  1
+
+#if defined(NO_SSL_DL)
+extern void SSL_free(SSL *);
+extern int SSL_accept(SSL *);
+extern int SSL_connect(SSL *);
+extern int SSL_read(SSL *, void *, int);
+extern int SSL_write(SSL *, const void *, int);
+extern int SSL_get_error(const SSL *, int);
+extern int SSL_set_fd(SSL *, int);
+extern SSL *SSL_new(SSL_CTX *);
+extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
+extern SSL_METHOD *SSLv23_server_method(void);
+extern int SSL_library_init(void);
+extern void SSL_load_error_strings(void);
+extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
+extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
+extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
+extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
+extern void SSL_CTX_free(SSL_CTX *);
+extern unsigned long ERR_get_error(void);
+extern char *ERR_error_string(unsigned long, char *);
+extern int CRYPTO_num_locks(void);
+extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
+extern void CRYPTO_set_id_callback(unsigned long (*)(void));
+#else
+// Dynamically loaded SSL functionality
+struct ssl_func {
+  const char *name;   // SSL function name
+  void  (*ptr)(void); // Function pointer
+};
+
+#define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
+#define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
+#define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
+#define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
+#define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
+#define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr)
+#define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
+#define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
+#define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
+#define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
+#define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
+#define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
+        const char *, int)) ssl_sw[11].ptr)
+#define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
+        const char *, int)) ssl_sw[12].ptr)
+#define SSL_CTX_set_default_passwd_cb \
+  (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
+#define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
+#define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
+#define SSL_CTX_use_certificate_chain_file \
+  (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
+
+#define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
+#define CRYPTO_set_locking_callback \
+  (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
+#define CRYPTO_set_id_callback \
+  (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
+#define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr)
+#define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr)
+
+// set_ssl_option() function updates this array.
+// It loads SSL library dynamically and changes NULLs to the actual addresses
+// of respective functions. The macros above (like SSL_connect()) are really
+// just calling these functions indirectly via the pointer.
+static struct ssl_func ssl_sw[] = {
+  {"SSL_free",   NULL},
+  {"SSL_accept",   NULL},
+  {"SSL_connect",   NULL},
+  {"SSL_read",   NULL},
+  {"SSL_write",   NULL},
+  {"SSL_get_error",  NULL},
+  {"SSL_set_fd",   NULL},
+  {"SSL_new",   NULL},
+  {"SSL_CTX_new",   NULL},
+  {"SSLv23_server_method", NULL},
+  {"SSL_library_init",  NULL},
+  {"SSL_CTX_use_PrivateKey_file", NULL},
+  {"SSL_CTX_use_certificate_file",NULL},
+  {"SSL_CTX_set_default_passwd_cb",NULL},
+  {"SSL_CTX_free",  NULL},
+  {"SSL_load_error_strings", NULL},
+  {"SSL_CTX_use_certificate_chain_file", NULL},
+  {NULL,    NULL}
+};
+
+// Similar array as ssl_sw. These functions could be located in different lib.
+#if !defined(NO_SSL)
+static struct ssl_func crypto_sw[] = {
+  {"CRYPTO_num_locks",  NULL},
+  {"CRYPTO_set_locking_callback", NULL},
+  {"CRYPTO_set_id_callback", NULL},
+  {"ERR_get_error",  NULL},
+  {"ERR_error_string", NULL},
+  {NULL,    NULL}
+};
+#endif // NO_SSL
+#endif // NO_SSL_DL
+
+static const char *month_names[] = {
+  "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+// Unified socket address. For IPv6 support, add IPv6 address structure
+// in the union u.
+union usa {
+  struct sockaddr sa;
+  struct sockaddr_in sin;
+#if defined(USE_IPV6)
+  struct sockaddr_in6 sin6;
+#endif
+};
+
+// Describes a string (chunk of memory).
+struct vec {
+  const char *ptr;
+  size_t len;
+};
+
+// Structure used by mg_stat() function. Uses 64 bit file length.
+struct mgstat {
+  int is_directory;  // Directory marker
+  int64_t size;      // File size
+  time_t mtime;      // Modification time
+};
+
+// Describes listening socket, or socket which was accept()-ed by the master
+// thread and queued for future handling by the worker thread.
+struct socket {
+  struct socket *next;  // Linkage
+  SOCKET sock;          // Listening socket
+  union usa lsa;        // Local socket address
+  union usa rsa;        // Remote socket address
+  int is_ssl;           // Is socket SSL-ed
+};
+
+enum {
+  CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
+  PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE,
+  SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
+  GLOBAL_PASSWORDS_FILE, INDEX_FILES,
+  ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE,
+  EXTRA_MIME_TYPES, LISTENING_PORTS,
+  DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER, REWRITE,
+  THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_POLICY,
+  NUM_OPTIONS
+};
+
+static const char *config_options[] = {
+  "C", "cgi_pattern", "**.cgi$|**.pl$|**.php$",
+  "E", "cgi_environment", NULL,
+  "G", "put_delete_passwords_file", NULL,
+  "I", "cgi_interpreter", NULL,
+  "P", "protect_uri", NULL,
+  "R", "authentication_domain", "mydomain.com",
+  "S", "ssi_pattern", "**.shtml$|**.shtm$",
+  "a", "access_log_file", NULL,
+  "c", "ssl_chain_file", NULL,
+  "d", "enable_directory_listing", "yes",
+  "e", "error_log_file", NULL,
+  "g", "global_passwords_file", NULL,
+  "i", "index_files", "index.html,index.htm,index.cgi,index.shtml,index.php",
+  "k", "enable_keep_alive", "no",
+  "l", "access_control_list", NULL,
+  "M", "max_request_size", "16384",
+  "m", "extra_mime_types", NULL,
+  "p", "listening_ports", "8080",
+  "r", "document_root",  ".",
+  "s", "ssl_certificate", NULL,
+  "t", "num_threads", "10",
+  "u", "run_as_user", NULL,
+  "w", "url_rewrite_patterns", NULL,
+  "x", "thread_stack_size", NULL,
+  "y", "thread_priority", NULL,
+  "z", "thread_policy", NULL,
+  NULL
+};
+#define ENTRIES_PER_CONFIG_OPTION 3
+
+struct mg_context {
+  volatile int stop_flag;       // Should we stop event loop
+  SSL_CTX *ssl_ctx;             // SSL context
+  char *config[NUM_OPTIONS];    // Mongoose configuration parameters
+  mg_callback_t user_callback;  // User-defined callback function
+  void *user_data;              // User-defined data
+
+  struct socket *listening_sockets;
+
+  volatile int num_threads;  // Number of threads
+  pthread_mutex_t mutex;     // Protects (max|num)_threads
+  pthread_cond_t  cond;      // Condvar for tracking workers terminations
+
+  struct socket queue[20];   // Accepted sockets
+  volatile int sq_head;      // Head of the socket queue
+  volatile int sq_tail;      // Tail of the socket queue
+  pthread_cond_t sq_full;    // Singaled when socket is produced
+  pthread_cond_t sq_empty;   // Signaled when socket is consumed
+};
+
+struct mg_connection {
+  struct mg_request_info request_info;
+  struct mg_context *ctx;
+  SSL *ssl;                   // SSL descriptor
+  struct socket client;       // Connected client
+  time_t birth_time;          // Time connection was accepted
+  int64_t num_bytes_sent;     // Total bytes sent to client
+  int64_t content_len;        // Content-Length header value
+  int64_t consumed_content;   // How many bytes of content is already read
+  char *buf;                  // Buffer for received data
+  char *path_info;            // PATH_INFO part of the URL
+  int must_close;             // 1 if connection must be closed
+  int buf_size;               // Buffer size
+  int request_len;            // Size of the request + headers in a buffer
+  int data_len;               // Total size of data in a buffer
+};
+
+const char **mg_get_valid_option_names(void) {
+  return config_options;
+}
+
+static void *call_user(struct mg_connection *conn, enum mg_event event) {
+  conn->request_info.user_data = conn->ctx->user_data;
+  return conn->ctx->user_callback == NULL ? NULL :
+    conn->ctx->user_callback(event, conn, &conn->request_info);
+}
+
+static int get_option_index(const char *name) {
+  int i;
+
+  for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
+    if (strcmp(config_options[i], name) == 0 ||
+        strcmp(config_options[i + 1], name) == 0) {
+      return i / ENTRIES_PER_CONFIG_OPTION;
+    }
+  }
+  return -1;
+}
+
+const char *mg_get_option(const struct mg_context *ctx, const char *name) {
+  int i;
+  if ((i = get_option_index(name)) == -1) {
+    return NULL;
+  } else if (ctx->config[i] == NULL) {
+    return "";
+  } else {
+    return ctx->config[i];
+  }
+}
+
+static void sockaddr_to_string(char *buf, size_t len,
+                                     const union usa *usa) {
+  buf[0] = '\0';
+#if defined(USE_IPV6)
+  inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ?
+            (void *) &usa->sin.sin_addr :
+            (void *) &usa->sin6.sin6_addr, buf, len);
+#elif defined(_WIN32)
+  // Only Windoze Vista (and newer) have inet_ntop()
+  strncpy(buf, inet_ntoa(usa->sin.sin_addr), len);
+#else
+  inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len);
+#endif
+}
+
+// Print error message to the opened error log stream.
+static void cry(struct mg_connection *conn, const char *fmt, ...) {
+  char buf[BUFSIZ], src_addr[20];
+  va_list ap;
+  FILE *fp;
+  time_t timestamp;
+
+  va_start(ap, fmt);
+  (void) vsnprintf(buf, sizeof(buf), fmt, ap);
+  va_end(ap);
+
+  // Do not lock when getting the callback value, here and below.
+  // I suppose this is fine, since function cannot disappear in the
+  // same way string option can.
+  conn->request_info.log_message = buf;
+  if (call_user(conn, MG_EVENT_LOG) == NULL) {
+    fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
+      mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
+
+    if (fp != NULL) {
+      flockfile(fp);
+      timestamp = time(NULL);
+
+      sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+      fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp,
+              src_addr);
+
+      if (conn->request_info.request_method != NULL) {
+        fprintf(fp, "%s %s: ", conn->request_info.request_method,
+                conn->request_info.uri);
+      }
+
+      (void) fprintf(fp, "%s", buf);
+      fputc('\n', fp);
+      funlockfile(fp);
+      if (fp != stderr) {
+        fclose(fp);
+      }
+    }
+  }
+  conn->request_info.log_message = NULL;
+}
+
+// Return fake connection structure. Used for logging, if connection
+// is not applicable at the moment of logging.
+static struct mg_connection *fc(struct mg_context *ctx) {
+  static struct mg_connection fake_connection;
+  fake_connection.ctx = ctx;
+  return &fake_connection;
+}
+
+const char *mg_version(void) {
+  return MONGOOSE_VERSION;
+}
+
+static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
+  for (; *src != '\0' && n > 1; n--) {
+    *dst++ = *src++;
+  }
+  *dst = '\0';
+}
+
+static int lowercase(const char *s) {
+  return tolower(* (const unsigned char *) s);
+}
+
+static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
+  int diff = 0;
+
+  if (len > 0)
+    do {
+      diff = lowercase(s1++) - lowercase(s2++);
+    } while (diff == 0 && s1[-1] != '\0' && --len > 0);
+
+  return diff;
+}
+
+static int mg_strcasecmp(const char *s1, const char *s2) {
+  int diff;
+
+  do {
+    diff = lowercase(s1++) - lowercase(s2++);
+  } while (diff == 0 && s1[-1] != '\0');
+
+  return diff;
+}
+
+static char * mg_strndup(const char *ptr, size_t len) {
+  char *p;
+
+  if ((p = (char *) malloc(len + 1)) != NULL) {
+    mg_strlcpy(p, ptr, len + 1);
+  }
+
+  return p;
+}
+
+static char * mg_strdup(const char *str) {
+  return mg_strndup(str, strlen(str));
+}
+
+// Like snprintf(), but never returns negative value, or the value
+// that is larger than a supplied buffer.
+// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
+// in his audit report.
+static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
+                        const char *fmt, va_list ap) {
+  int n;
+
+  if (buflen == 0)
+    return 0;
+
+  n = vsnprintf(buf, buflen, fmt, ap);
+
+  if (n < 0) {
+    cry(conn, "vsnprintf error");
+    n = 0;
+  } else if (n >= (int) buflen) {
+    cry(conn, "truncating vsnprintf buffer: [%.*s]",
+        n > 200 ? 200 : n, buf);
+    n = (int) buflen - 1;
+  }
+  buf[n] = '\0';
+
+  return n;
+}
+
+static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
+                       const char *fmt, ...) {
+  va_list ap;
+  int n;
+
+  va_start(ap, fmt);
+  n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
+  va_end(ap);
+
+  return n;
+}
+
+// Skip the characters until one of the delimiters characters found.
+// 0-terminate resulting word. Skip the delimiter and following whitespaces if any.
+// Advance pointer to buffer to the next word. Return found 0-terminated word.
+// Delimiters can be quoted with quotechar.
+static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) {
+  char *p, *begin_word, *end_word, *end_whitespace;
+
+  begin_word = *buf;
+  end_word = begin_word + strcspn(begin_word, delimiters);
+
+  // Check for quotechar
+  if (end_word > begin_word) {
+    p = end_word - 1;
+    while (*p == quotechar) {
+      // If there is anything beyond end_word, copy it
+      if (*end_word == '\0') {
+        *p = '\0';
+        break;
+      } else {
+        size_t end_off = strcspn(end_word + 1, delimiters);
+        memmove (p, end_word, end_off + 1);
+        p += end_off; // p must correspond to end_word - 1
+        end_word += end_off + 1;
+      }
+    }
+    for (p++; p < end_word; p++) {
+      *p = '\0';
+    }
+  }
+
+  if (*end_word == '\0') {
+    *buf = end_word;
+  } else {
+    end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
+
+    for (p = end_word; p < end_whitespace; p++) {
+      *p = '\0';
+    }
+
+    *buf = end_whitespace;
+  }
+
+  return begin_word;
+}
+
+// Simplified version of skip_quoted without quote char
+// and whitespace == delimiters
+static char *skip(char **buf, const char *delimiters) {
+  return skip_quoted(buf, delimiters, delimiters, 0);
+}
+
+
+// Return HTTP header value, or NULL if not found.
+static const char *get_header(const struct mg_request_info *ri,
+                              const char *name) {
+  int i;
+
+  for (i = 0; i < ri->num_headers; i++)
+    if (!mg_strcasecmp(name, ri->http_headers[i].name))
+      return ri->http_headers[i].value;
+
+  return NULL;
+}
+
+const char *mg_get_header(const struct mg_connection *conn, const char *name) {
+  return get_header(&conn->request_info, name);
+}
+
+// A helper function for traversing comma separated list of values.
+// It returns a list pointer shifted to the next value, of NULL if the end
+// of the list found.
+// Value is stored in val vector. If value has form "x=y", then eq_val
+// vector is initialized to point to the "y" part, and val vector length
+// is adjusted to point only to "x".
+static const char *next_option(const char *list, struct vec *val,
+                               struct vec *eq_val) {
+  if (list == NULL || *list == '\0') {
+    // End of the list
+    list = NULL;
+  } else {
+    val->ptr = list;
+    if ((list = strchr(val->ptr, ',')) != NULL) {
+      // Comma found. Store length and shift the list ptr
+      val->len = list - val->ptr;
+      list++;
+    } else {
+      // This value is the last one
+      list = val->ptr + strlen(val->ptr);
+      val->len = list - val->ptr;
+    }
+
+    if (eq_val != NULL) {
+      // Value has form "x=y", adjust pointers and lengths
+      // so that val points to "x", and eq_val points to "y".
+      eq_val->len = 0;
+      eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
+      if (eq_val->ptr != NULL) {
+        eq_val->ptr++;  // Skip over '=' character
+        eq_val->len = val->ptr + val->len - eq_val->ptr;
+        val->len = (eq_val->ptr - val->ptr) - 1;
+      }
+    }
+  }
+
+  return list;
+}
+
+static int match_prefix(const char *pattern, int pattern_len, const char *str) {
+  const char *or_str;
+  int i, j, len, res;
+
+  if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
+    res = match_prefix(pattern, or_str - pattern, str);
+    return res > 0 ? res :
+        match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
+  }
+
+  i = j = 0;
+  res = -1;
+  for (; i < pattern_len; i++, j++) {
+    if (pattern[i] == '?' && str[j] != '\0') {
+      continue;
+    } else if (pattern[i] == '$') {
+      return str[j] == '\0' ? j : -1;
+    } else if (pattern[i] == '*') {
+      i++;
+      if (pattern[i] == '*') {
+        i++;
+        len = strlen(str + j);
+      } else {
+        len = strcspn(str + j, "/");
+      }
+      if (i == pattern_len) {
+        return j + len;
+      }
+      do {
+        res = match_prefix(pattern + i, pattern_len - i, str + j + len);
+      } while (res == -1 && len-- > 0);
+      return res == -1 ? -1 : j + res + len;
+    } else if (pattern[i] != str[j]) {
+      return -1;
+    }
+  }
+  return j;
+}
+
+// HTTP 1.1 assumes keep alive if "Connection:" header is not set
+// This function must tolerate situations when connection info is not
+// set up, for example if request parsing failed.
+static int should_keep_alive(const struct mg_connection *conn) {
+  const char *http_version = conn->request_info.http_version;
+  const char *header = mg_get_header(conn, "Connection");
+  if (conn->must_close ||
+      conn->request_info.status_code == 401 ||
+      mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 ||
+      (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) ||
+      (header == NULL && http_version && strcmp(http_version, "1.1"))) {
+    return 0;
+  }
+  return 1;
+}
+
+static const char *suggest_connection_header(const struct mg_connection *conn) {
+  return should_keep_alive(conn) ? "keep-alive" : "close";
+}
+
+static void send_http_error(struct mg_connection *conn, int status,
+                            const char *reason, const char *fmt, ...) {
+  char buf[BUFSIZ];
+  va_list ap;
+  int len;
+
+  conn->request_info.status_code = status;
+
+  if (call_user(conn, MG_HTTP_ERROR) == NULL) {
+    buf[0] = '\0';
+    len = 0;
+
+    // Errors 1xx, 204 and 304 MUST NOT send a body
+    if (status > 199 && status != 204 && status != 304) {
+      len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
+      cry(conn, "%s", buf);
+      buf[len++] = '\n';
+
+      va_start(ap, fmt);
+      len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
+      va_end(ap);
+    }
+    DEBUG_TRACE(("[%s]", buf));
+
+    mg_printf(conn, "HTTP/1.1 %d %s\r\n"
+              "Content-Type: text/plain\r\n"
+              "Content-Length: %d\r\n"
+              "Connection: %s\r\n\r\n", status, reason, len,
+              suggest_connection_header(conn));
+    conn->num_bytes_sent += mg_printf(conn, "%s", buf);
+  }
+}
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
+  unused = NULL;
+  *mutex = CreateMutex(NULL, FALSE, NULL);
+  return *mutex == NULL ? -1 : 0;
+}
+
+static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
+  return CloseHandle(*mutex) == 0 ? -1 : 0;
+}
+
+static int pthread_mutex_lock(pthread_mutex_t *mutex) {
+  return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
+}
+
+static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
+  return ReleaseMutex(*mutex) == 0 ? -1 : 0;
+}
+
+static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
+  unused = NULL;
+  cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
+  cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
+  return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
+}
+
+static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
+  HANDLE handles[] = {cv->signal, cv->broadcast};
+  ReleaseMutex(*mutex);
+  WaitForMultipleObjects(2, handles, FALSE, INFINITE);
+  return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
+}
+
+static int pthread_cond_signal(pthread_cond_t *cv) {
+  return SetEvent(cv->signal) == 0 ? -1 : 0;
+}
+
+static int pthread_cond_broadcast(pthread_cond_t *cv) {
+  // Implementation with PulseEvent() has race condition, see
+  // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
+  return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
+}
+
+static int pthread_cond_destroy(pthread_cond_t *cv) {
+  return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
+}
+
+// For Windows, change all slashes to backslashes in path names.
+static void change_slashes_to_backslashes(char *path) {
+  int i;
+
+  for (i = 0; path[i] != '\0'; i++) {
+    if (path[i] == '/')
+      path[i] = '\\';
+    // i > 0 check is to preserve UNC paths, like \\server\file.txt
+    if (path[i] == '\\' && i > 0)
+      while (path[i + 1] == '\\' || path[i + 1] == '/')
+        (void) memmove(path + i + 1,
+            path + i + 2, strlen(path + i + 1));
+  }
+}
+
+// Encode 'path' which is assumed UTF-8 string, into UNICODE string.
+// wbuf and wbuf_len is a target buffer and its length.
+static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
+  char buf[PATH_MAX], buf2[PATH_MAX], *p;
+
+  mg_strlcpy(buf, path, sizeof(buf));
+  change_slashes_to_backslashes(buf);
+
+  // Point p to the end of the file name
+  p = buf + strlen(buf) - 1;
+
+  // Trim trailing backslash character
+  while (p > buf && *p == '\\' && p[-1] != ':') {
+    *p-- = '\0';
+  }
+
+   // Protect from CGI code disclosure.
+   // This is very nasty hole. Windows happily opens files with
+   // some garbage in the end of file name. So fopen("a.cgi    ", "r")
+   // actually opens "a.cgi", and does not return an error!
+  if (*p == 0x20 ||               // No space at the end
+      (*p == 0x2e && p > buf) ||  // No '.' but allow '.' as full path
+      *p == 0x2b ||               // No '+'
+      (*p & ~0x7f)) {             // And generally no non-ascii chars
+    (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
+    wbuf[0] = L'\0';
+  } else {
+    // Convert to Unicode and back. If doubly-converted string does not
+    // match the original, something is fishy, reject.
+    memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
+    MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
+    WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
+                        NULL, NULL);
+    if (strcmp(buf, buf2) != 0) {
+      wbuf[0] = L'\0';
+    }
+  }
+}
+
+#if defined(_WIN32_WCE)
+static time_t time(time_t *ptime) {
+  time_t t;
+  SYSTEMTIME st;
+  FILETIME ft;
+
+  GetSystemTime(&st);
+  SystemTimeToFileTime(&st, &ft);
+  t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
+
+  if (ptime != NULL) {
+    *ptime = t;
+  }
+
+  return t;
+}
+
+static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
+  int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
+  FILETIME ft, lft;
+  SYSTEMTIME st;
+  TIME_ZONE_INFORMATION tzinfo;
+
+  if (ptm == NULL) {
+    return NULL;
+  }
+
+  * (int64_t *) &ft = t;
+  FileTimeToLocalFileTime(&ft, &lft);
+  FileTimeToSystemTime(&lft, &st);
+  ptm->tm_year = st.wYear - 1900;
+  ptm->tm_mon = st.wMonth - 1;
+  ptm->tm_wday = st.wDayOfWeek;
+  ptm->tm_mday = st.wDay;
+  ptm->tm_hour = st.wHour;
+  ptm->tm_min = st.wMinute;
+  ptm->tm_sec = st.wSecond;
+  ptm->tm_yday = 0; // hope nobody uses this
+  ptm->tm_isdst =
+    GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
+
+  return ptm;
+}
+
+static struct tm *gmtime(const time_t *ptime, struct tm *ptm) {
+  // FIXME(lsm): fix this.
+  return localtime(ptime, ptm);
+}
+
+static size_t strftime(char *dst, size_t dst_size, const char *fmt,
+                       const struct tm *tm) {
+  (void) snprintf(dst, dst_size, "implement strftime() for WinCE");
+  return 0;
+}
+#endif
+
+static int mg_rename(const char* oldname, const char* newname) {
+  wchar_t woldbuf[PATH_MAX];
+  wchar_t wnewbuf[PATH_MAX];
+
+  to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
+  to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
+
+  return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
+}
+
+
+static FILE *mg_fopen(const char *path, const char *mode) {
+  wchar_t wbuf[PATH_MAX], wmode[20];
+
+  to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
+  MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
+
+  return _wfopen(wbuf, wmode);
+}
+
+static int mg_stat(const char *path, struct mgstat *stp) {
+  int ok = -1; // Error
+  wchar_t wbuf[PATH_MAX];
+  WIN32_FILE_ATTRIBUTE_DATA info;
+
+  to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
+
+  if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
+    stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
+    stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
+                               info.ftLastWriteTime.dwHighDateTime);
+    stp->is_directory =
+      info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
+    ok = 0;  // Success
+  }
+
+  return ok;
+}
+
+static int mg_remove(const char *path) {
+  wchar_t wbuf[PATH_MAX];
+  to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
+  return DeleteFileW(wbuf) ? 0 : -1;
+}
+
+static int mg_mkdir(const char *path, int mode) {
+  char buf[PATH_MAX];
+  wchar_t wbuf[PATH_MAX];
+
+  mode = 0; // Unused
+  mg_strlcpy(buf, path, sizeof(buf));
+  change_slashes_to_backslashes(buf);
+
+  (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
+
+  return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
+}
+
+// Implementation of POSIX opendir/closedir/readdir for Windows.
+static DIR * opendir(const char *name) {
+  DIR *dir = NULL;
+  wchar_t wpath[PATH_MAX];
+  DWORD attrs;
+
+  if (name == NULL) {
+    SetLastError(ERROR_BAD_ARGUMENTS);
+  } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
+    SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+  } else {
+    to_unicode(name, wpath, ARRAY_SIZE(wpath));
+    attrs = GetFileAttributesW(wpath);
+    if (attrs != 0xFFFFFFFF &&
+        ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
+      (void) wcscat(wpath, L"\\*");
+      dir->handle = FindFirstFileW(wpath, &dir->info);
+      dir->result.d_name[0] = '\0';
+    } else {
+      free(dir);
+      dir = NULL;
+    }
+  }
+
+  return dir;
+}
+
+static int closedir(DIR *dir) {
+  int result = 0;
+
+  if (dir != NULL) {
+    if (dir->handle != INVALID_HANDLE_VALUE)
+      result = FindClose(dir->handle) ? 0 : -1;
+
+    free(dir);
+  } else {
+    result = -1;
+    SetLastError(ERROR_BAD_ARGUMENTS);
+  }
+
+  return result;
+}
+
+static struct dirent *readdir(DIR *dir) {
+  struct dirent *result = 0;
+
+  if (dir) {
+    if (dir->handle != INVALID_HANDLE_VALUE) {
+      result = &dir->result;
+      (void) WideCharToMultiByte(CP_UTF8, 0,
+          dir->info.cFileName, -1, result->d_name,
+          sizeof(result->d_name), NULL, NULL);
+
+      if (!FindNextFileW(dir->handle, &dir->info)) {
+        (void) FindClose(dir->handle);
+        dir->handle = INVALID_HANDLE_VALUE;
+      }
+
+    } else {
+      SetLastError(ERROR_FILE_NOT_FOUND);
+    }
+  } else {
+    SetLastError(ERROR_BAD_ARGUMENTS);
+  }
+
+  return result;
+}
+
+#define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
+
+static int start_thread(struct mg_context *ctx, mg_thread_func_t f, void *p) {
+  return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0;
+}
+
+static HANDLE dlopen(const char *dll_name, int flags) {
+  wchar_t wbuf[PATH_MAX];
+  flags = 0; // Unused
+  to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
+  return LoadLibraryW(wbuf);
+}
+
+#if !defined(NO_CGI)
+#define SIGKILL 0
+static int kill(pid_t pid, int sig_num) {
+  (void) TerminateProcess(pid, sig_num);
+  (void) CloseHandle(pid);
+  return 0;
+}
+
+static pid_t spawn_process(struct mg_connection *conn, const char *prog,
+                           char *envblk, char *envp[], int fd_stdin,
+                           int fd_stdout, const char *dir) {
+  HANDLE me;
+  char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX];
+  FILE *fp;
+  STARTUPINFOA si = { sizeof(si) };
+  PROCESS_INFORMATION pi = { 0 };
+
+  envp = NULL; // Unused
+
+  // TODO(lsm): redirect CGI errors to the error log file
+  si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+  si.wShowWindow = SW_HIDE;
+
+  me = GetCurrentProcess();
+  (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
+      &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
+  (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
+      &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
+
+  // If CGI file is a script, try to read the interpreter line
+  interp = conn->ctx->config[CGI_INTERPRETER];
+  if (interp == NULL) {
+    buf[2] = '\0';
+    mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog);
+    if ((fp = fopen(cmdline, "r")) != NULL) {
+      (void) fgets(buf, sizeof(buf), fp);
+      if (buf[0] != '#' || buf[1] != '!') {
+        // First line does not start with "#!". Do not set interpreter.
+        buf[2] = '\0';
+      } else {
+        // Trim whitespaces in interpreter name
+        for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) {
+          *p = '\0';
+        }
+      }
+      (void) fclose(fp);
+    }
+    interp = buf + 2;
+  }
+
+  (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s",
+                     interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog);
+
+  DEBUG_TRACE(("Running [%s]", cmdline));
+  if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
+        CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
+    cry(conn, "%s: CreateProcess(%s): %d",
+        __func__, cmdline, ERRNO);
+    pi.hProcess = (pid_t) -1;
+  } else {
+    (void) close(fd_stdin);
+    (void) close(fd_stdout);
+  }
+
+  (void) CloseHandle(si.hStdOutput);
+  (void) CloseHandle(si.hStdInput);
+  (void) CloseHandle(pi.hThread);
+
+  return (pid_t) pi.hProcess;
+}
+#endif // !NO_CGI
+
+static int set_non_blocking_mode(SOCKET sock) {
+  unsigned long on = 1;
+  return ioctlsocket(sock, FIONBIO, &on);
+}
+
+#else
+static int mg_stat(const char *path, struct mgstat *stp) {
+  struct stat st;
+  int ok;
+
+  if (stat(path, &st) == 0) {
+    ok = 0;
+    stp->size = st.st_size;
+    stp->mtime = st.st_mtime;
+    stp->is_directory = S_ISDIR(st.st_mode);
+  } else {
+    ok = -1;
+  }
+
+  return ok;
+}
+
+static void set_close_on_exec(int fd) {
+  (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
+}
+
+static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
+                        void *param) {
+  pthread_t thread_id;
+  pthread_attr_t attr;
+  int retval;
+  char* stacksize = ctx->config[THREAD_STACK_SIZE];
+  char* priority = ctx->config[THREAD_PRIORITY];
+  char* policy = ctx->config[THREAD_POLICY];
+  int noinheritsched = 0;
+
+  (void) pthread_attr_init(&attr);
+  (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+  // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled
+  // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5);
+
+  if (stacksize != NULL) {
+    size_t size = atoi(stacksize);
+    (void) pthread_attr_setstacksize(&attr, size);
+  }
+
+  if (priority != NULL) {
+    struct sched_param sched_param;
+    memset(&sched_param, 0, sizeof(sched_param));
+    sched_param.sched_priority = atoi(priority);
+    (void) pthread_attr_setschedparam(&attr, &sched_param);
+    noinheritsched = 1;
+  }
+
+  if (policy != NULL) {
+    int p_policy;
+    (void) pthread_attr_getschedpolicy(&attr, &p_policy);
+
+    switch (policy[0]) {
+      case 'o':
+        p_policy = SCHED_OTHER;
+        break;
+      case 'f':
+        p_policy = SCHED_FIFO;
+        break;
+      case 'r':
+        p_policy = SCHED_RR;
+        break;
+#if defined(_POSIX_SPORADIC_SERVER) || defined(_POSIX_THREAD_SPORADIC_SERVER)
+      case 's':
+        p_policy = SCHED_SPORADIC;
+        break;
+#endif
+      default:
+        cry(fc(ctx), "%s: Unknown scheduler: %s", __func__, policy);
+        break;
+    }
+
+    (void) pthread_attr_setschedpolicy(&attr, p_policy);
+
+    noinheritsched = 1;
+  }
+
+  if (noinheritsched != 0) {
+    (void) pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
+  }
+
+  if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) {
+    cry(fc(ctx), "%s: %s", __func__, strerror(retval));
+  }
+
+  return retval;
+}
+
+#ifndef NO_CGI
+static pid_t spawn_process(struct mg_connection *conn, const char *prog,
+                           char *envblk, char *envp[], int fd_stdin,
+                           int fd_stdout, const char *dir) {
+  pid_t pid;
+  const char *interp;
+
+  envblk = NULL; // Unused
+
+  if ((pid = fork()) == -1) {
+    // Parent
+    send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
+  } else if (pid == 0) {
+    // Child
+    if (chdir(dir) != 0) {
+      cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
+    } else if (dup2(fd_stdin, 0) == -1) {
+      cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
+    } else if (dup2(fd_stdout, 1) == -1) {
+      cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
+    } else {
+      (void) dup2(fd_stdout, 2);
+      (void) close(fd_stdin);
+      (void) close(fd_stdout);
+
+      // Execute CGI program. No need to lock: new process
+      interp = conn->ctx->config[CGI_INTERPRETER];
+      if (interp == NULL) {
+        (void) execle(prog, prog, NULL, envp);
+        cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
+      } else {
+        (void) execle(interp, interp, prog, NULL, envp);
+        cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
+            strerror(ERRNO));
+      }
+    }
+    exit(EXIT_FAILURE);
+  } else {
+    // Parent. Close stdio descriptors
+    (void) close(fd_stdin);
+    (void) close(fd_stdout);
+  }
+
+  return pid;
+}
+#endif // !NO_CGI
+
+static int set_non_blocking_mode(SOCKET sock) {
+  int flags;
+
+  flags = fcntl(sock, F_GETFL, 0);
+  (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
+
+  return 0;
+}
+#endif // _WIN32
+
+// Write data to the IO channel - opened file descriptor, socket or SSL
+// descriptor. Return number of bytes written.
+static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
+                    int64_t len) {
+  int64_t sent;
+  int n, k;
+
+  sent = 0;
+  while (sent < len) {
+
+    // How many bytes we send in this iteration
+    k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
+
+    if (ssl != NULL) {
+      n = SSL_write(ssl, buf + sent, k);
+    } else if (fp != NULL) {
+      n = fwrite(buf + sent, 1, (size_t) k, fp);
+      if (ferror(fp))
+        n = -1;
+    } else {
+      n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL);
+    }
+
+    if (n < 0)
+      break;
+
+    sent += n;
+  }
+
+  return sent;
+}
+
+// Read from IO channel - opened file descriptor, socket, or SSL descriptor.
+// Return number of bytes read.
+static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) {
+  int nread;
+
+  if (ssl != NULL) {
+    nread = SSL_read(ssl, buf, len);
+  } else if (fp != NULL) {
+    // Use read() instead of fread(), because if we're reading from the CGI
+    // pipe, fread() may block until IO buffer is filled up. We cannot afford
+    // to block and must pass all read bytes immediately to the client.
+    nread = read(fileno(fp), buf, (size_t) len);
+    if (ferror(fp))
+      nread = -1;
+  } else {
+    nread = recv(sock, buf, (size_t) len, 0);
+  }
+
+  return nread;
+}
+
+int mg_read(struct mg_connection *conn, void *buf, size_t len) {
+  int n, buffered_len, nread;
+  const char *buffered;
+
+  assert((conn->content_len == -1 && conn->consumed_content == 0) ||
+         conn->consumed_content <= conn->content_len);
+  DEBUG_TRACE(("%p %zu %lld %lld", buf, len,
+               conn->content_len, conn->consumed_content));
+  nread = 0;
+  if (conn->consumed_content < conn->content_len) {
+
+    // Adjust number of bytes to read.
+    int64_t to_read = conn->content_len - conn->consumed_content;
+    if (to_read < (int64_t) len) {
+      len = (int) to_read;
+    }
+
+    // How many bytes of data we have buffered in the request buffer?
+    buffered = conn->buf + conn->request_len + conn->consumed_content;
+    buffered_len = conn->data_len - conn->request_len;
+    assert(buffered_len >= 0);
+
+    // Return buffered data back if we haven't done that yet.
+    if (conn->consumed_content < (int64_t) buffered_len) {
+      buffered_len -= (int) conn->consumed_content;
+      if (len < (size_t) buffered_len) {
+        buffered_len = len;
+      }
+      memcpy(buf, buffered, (size_t)buffered_len);
+      len -= buffered_len;
+      buf = (char *) buf + buffered_len;
+      conn->consumed_content += buffered_len;
+      nread = buffered_len;
+    }
+
+    // We have returned all buffered data. Read new data from the remote socket.
+    while (len > 0) {
+      n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len);
+      if (n <= 0) {
+        break;
+      }
+      buf = (char *) buf + n;
+      conn->consumed_content += n;
+      nread += n;
+      len -= n;
+    }
+  }
+  return nread;
+}
+
+int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
+  return (int) push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
+                    (int64_t) len);
+}
+
+int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
+  char buf[BUFSIZ];
+  int len;
+  va_list ap;
+
+  va_start(ap, fmt);
+  len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap);
+  va_end(ap);
+
+  return mg_write(conn, buf, (size_t)len);
+}
+
+// URL-decode input buffer into destination buffer.
+// 0-terminate the destination buffer. Return the length of decoded data.
+// form-url-encoded data differs from URI encoding in a way that it
+// uses '+' as character for space, see RFC 1866 section 8.2.1
+// http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
+static size_t url_decode(const char *src, size_t src_len, char *dst,
+                         size_t dst_len, int is_form_url_encoded) {
+  size_t i, j;
+  int a, b;
+#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
+
+  for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
+    if (src[i] == '%' &&
+        isxdigit(* (const unsigned char *) (src + i + 1)) &&
+        isxdigit(* (const unsigned char *) (src + i + 2))) {
+      a = tolower(* (const unsigned char *) (src + i + 1));
+      b = tolower(* (const unsigned char *) (src + i + 2));
+      dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
+      i += 2;
+    } else if (is_form_url_encoded && src[i] == '+') {
+      dst[j] = ' ';
+    } else {
+      dst[j] = src[i];
+    }
+  }
+
+  dst[j] = '\0'; // Null-terminate the destination
+
+  return j;
+}
+
+// Scan given buffer and fetch the value of the given variable.
+// It can be specified in query string, or in the POST data.
+// Return NULL if the variable not found, or allocated 0-terminated value.
+// It is caller's responsibility to free the returned value.
+int mg_get_var(const char *buf, size_t buf_len, const char *name,
+               char *dst, size_t dst_len) {
+  const char *p, *e, *s;
+  size_t name_len, len;
+
+  name_len = strlen(name);
+  e = buf + buf_len;
+  len = -1;
+  dst[0] = '\0';
+
+  // buf is "var1=val1&var2=val2...". Find variable first
+  for (p = buf; p != NULL && p + name_len < e; p++) {
+    if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
+        !mg_strncasecmp(name, p, name_len)) {
+
+      // Point p to variable value
+      p += name_len + 1;
+
+      // Point s to the end of the value
+      s = (const char *) memchr(p, '&', (size_t)(e - p));
+      if (s == NULL) {
+        s = e;
+      }
+      assert(s >= p);
+
+      // Decode variable into destination buffer
+      if ((size_t) (s - p) < dst_len) {
+        len = url_decode(p, (size_t)(s - p), dst, dst_len, 1);
+      }
+      break;
+    }
+  }
+
+  return len;
+}
+
+int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
+                  char *dst, size_t dst_size) {
+  const char *s, *p, *end;
+  int name_len, len = -1;
+
+  dst[0] = '\0';
+  if ((s = mg_get_header(conn, "Cookie")) == NULL) {
+    return 0;
+  }
+
+  name_len = strlen(cookie_name);
+  end = s + strlen(s);
+
+  for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
+    if (s[name_len] == '=') {
+      s += name_len + 1;
+      if ((p = strchr(s, ' ')) == NULL)
+        p = end;
+      if (p[-1] == ';')
+        p--;
+      if (*s == '"' && p[-1] == '"' && p > s + 1) {
+        s++;
+        p--;
+      }
+      if ((size_t) (p - s) < dst_size) {
+        len = (p - s) + 1;
+        mg_strlcpy(dst, s, (size_t)len);
+      }
+      break;
+    }
+
+  return len;
+}
+
+static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
+                                    size_t buf_len, struct mgstat *st) {
+  struct vec a, b;
+  const char *rewrite, *uri = conn->request_info.uri;
+  char *p;
+  int match_len, stat_result;
+
+  buf_len--;  // This is because memmove() for PATH_INFO may shift part
+              // of the path one byte on the right.
+  mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT],
+              uri);
+
+  rewrite = conn->ctx->config[REWRITE];
+  while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
+    if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
+      mg_snprintf(conn, buf, buf_len, "%.*s%s", b.len, b.ptr, uri + match_len);
+      break;
+    }
+  }
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+  //change_slashes_to_backslashes(buf);
+#endif // _WIN32
+
+  if ((stat_result = mg_stat(buf, st)) != 0) {
+    // Support PATH_INFO for CGI scripts.
+    for (p = buf + strlen(buf); p > buf + 1; p--) {
+      if (*p == '/') {
+        *p = '\0';
+        if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
+                         strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 &&
+            (stat_result = mg_stat(buf, st)) == 0) {
+          // Shift PATH_INFO block one character right, e.g.
+          //  "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00"
+          // conn->path_info is pointing to the local variable "path" declared
+          // in handle_request(), so PATH_INFO not valid after
+          // handle_request returns.
+          conn->path_info = p + 1;
+          memmove(p + 2, p + 1, strlen(p + 1) + 1);  // +1 is for trailing \0
+          p[1] = '/';
+          break;
+        } else {
+          *p = '/';
+          stat_result = -1;
+        }
+      }
+    }
+  }
+
+  return stat_result;
+}
+
+static int sslize(struct mg_connection *conn, int (*func)(SSL *)) {
+  return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL &&
+    SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
+    func(conn->ssl) == 1;
+}
+
+// Check whether full request is buffered. Return:
+//   -1  if request is malformed
+//    0  if request is not yet fully buffered
+//   >0  actual request length, including last \r\n\r\n
+static int get_request_len(const char *buf, int buflen) {
+  const char *s, *e;
+  int len = 0;
+
+  DEBUG_TRACE(("buf: %p, len: %d", buf, buflen));
+  for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
+    // Control characters are not allowed but >=128 is.
+    if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
+        *s != '\n' && * (const unsigned char *) s < 128) {
+      len = -1;
+    } else if (s[0] == '\n' && s[1] == '\n') {
+      len = (int) (s - buf) + 2;
+    } else if (s[0] == '\n' && &s[1] < e &&
+        s[1] == '\r' && s[2] == '\n') {
+      len = (int) (s - buf) + 3;
+    }
+
+  return len;
+}
+
+// Convert month to the month number. Return -1 on error, or month number
+static int get_month_index(const char *s) {
+  size_t i;
+
+  for (i = 0; i < ARRAY_SIZE(month_names); i++)
+    if (!strcmp(s, month_names[i]))
+      return (int) i;
+
+  return -1;
+}
+
+// Parse UTC date-time string, and return the corresponding time_t value.
+static time_t parse_date_string(const char *datetime) {
+  static const unsigned short days_before_month[] = {
+    0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+  };
+  char month_str[32];
+  int second, minute, hour, day, month, year, leap_days, days;
+  time_t result = (time_t) 0;
+
+  if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
+               &day, month_str, &year, &hour, &minute, &second) == 6) ||
+       (sscanf(datetime, "%d %3s %d %d:%d:%d",
+               &day, month_str, &year, &hour, &minute, &second) == 6) ||
+       (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
+               &day, month_str, &year, &hour, &minute, &second) == 6) ||
+       (sscanf(datetime, "%d-%3s-%d %d:%d:%d",
+               &day, month_str, &year, &hour, &minute, &second) == 6)) &&
+      year > 1970 &&
+      (month = get_month_index(month_str)) != -1) {
+    year -= 1970;
+    leap_days = year / 4 - year / 100 + year / 400;
+    days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
+    result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
+  }
+
+  return result;
+}
+
+// Protect against directory disclosure attack by removing '..',
+// excessive '/' and '\' characters
+static void remove_double_dots_and_double_slashes(char *s) {
+  char *p = s;
+
+  while (*s != '\0') {
+    *p++ = *s++;
+    if (IS_DIRSEP_CHAR(s[-1])) {
+      // Skip all following slashes and backslashes
+      while (IS_DIRSEP_CHAR(s[0])) {
+        s++;
+      }
+
+      // Skip all double-dots
+      while (*s == '.' && s[1] == '.') {
+        s += 2;
+      }
+    }
+  }
+  *p = '\0';
+}
+
+static const struct {
+  const char *extension;
+  size_t ext_len;
+  const char *mime_type;
+  size_t mime_type_len;
+} builtin_mime_types[] = {
+  {".html", 5, "text/html",   9},
+  {".htm", 4, "text/html",   9},
+  {".shtm", 5, "text/html",   9},
+  {".shtml", 6, "text/html",   9},
+  {".css", 4, "text/css",   8},
+  {".js",  3, "application/x-javascript", 24},
+  {".ico", 4, "image/x-icon",   12},
+  {".gif", 4, "image/gif",   9},
+  {".jpg", 4, "image/jpeg",   10},
+  {".jpeg", 5, "image/jpeg",   10},
+  {".png", 4, "image/png",   9},
+  {".svg", 4, "image/svg+xml",  13},
+  {".torrent", 8, "application/x-bittorrent", 24},
+  {".wav", 4, "audio/x-wav",   11},
+  {".mp3", 4, "audio/x-mp3",   11},
+  {".mid", 4, "audio/mid",   9},
+  {".m3u", 4, "audio/x-mpegurl",  15},
+  {".ram", 4, "audio/x-pn-realaudio",  20},
+  {".xml", 4, "text/xml",   8},
+  {".xslt", 5, "application/xml",  15},
+  {".ra",  3, "audio/x-pn-realaudio",  20},
+  {".doc", 4, "application/msword",  19},
+  {".exe", 4, "application/octet-stream", 24},
+  {".zip", 4, "application/x-zip-compressed", 28},
+  {".xls", 4, "application/excel",  17},
+  {".tgz", 4, "application/x-tar-gz",  20},
+  {".tar", 4, "application/x-tar",  17},
+  {".gz",  3, "application/x-gunzip",  20},
+  {".arj", 4, "application/x-arj-compressed", 28},
+  {".rar", 4, "application/x-arj-compressed", 28},
+  {".rtf", 4, "application/rtf",  15},
+  {".pdf", 4, "application/pdf",  15},
+  {".swf", 4, "application/x-shockwave-flash",29},
+  {".mpg", 4, "video/mpeg",   10},
+  {".mpeg", 5, "video/mpeg",   10},
+  {".mp4", 4, "video/mp4", 9},
+  {".m4v", 4, "video/x-m4v", 11},
+  {".asf", 4, "video/x-ms-asf",  14},
+  {".avi", 4, "video/x-msvideo",  15},
+  {".bmp", 4, "image/bmp",   9},
+  {NULL,  0, NULL,    0}
+};
+
+// Look at the "path" extension and figure what mime type it has.
+// Store mime type in the vector.
+static void get_mime_type(struct mg_context *ctx, const char *path,
+                          struct vec *vec) {
+  struct vec ext_vec, mime_vec;
+  const char *list, *ext;
+  size_t i, path_len;
+
+  path_len = strlen(path);
+
+  // Scan user-defined mime types first, in case user wants to
+  // override default mime types.
+  list = ctx->config[EXTRA_MIME_TYPES];
+  while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
+    // ext now points to the path suffix
+    ext = path + path_len - ext_vec.len;
+    if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
+      *vec = mime_vec;
+      return;
+    }
+  }
+
+  // Now scan built-in mime types
+  for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
+    ext = path + (path_len - builtin_mime_types[i].ext_len);
+    if (path_len > builtin_mime_types[i].ext_len &&
+        mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
+      vec->ptr = builtin_mime_types[i].mime_type;
+      vec->len = builtin_mime_types[i].mime_type_len;
+      return;
+    }
+  }
+
+  // Nothing found. Fall back to "text/plain"
+  vec->ptr = "text/plain";
+  vec->len = 10;
+}
+
+#ifndef HAVE_MD5
+typedef struct MD5Context {
+  uint32_t buf[4];
+  uint32_t bits[2];
+  unsigned char in[64];
+} MD5_CTX;
+
+#if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
+#define byteReverse(buf, len) // Do nothing
+#else
+static void byteReverse(unsigned char *buf, unsigned longs) {
+  uint32_t t;
+  do {
+    t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+      ((unsigned) buf[1] << 8 | buf[0]);
+    *(uint32_t *) buf = t;
+    buf += 4;
+  } while (--longs);
+}
+#endif
+
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+#define MD5STEP(f, w, x, y, z, data, s) \
+  ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
+
+// Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
+// initialization constants.
+static void MD5Init(MD5_CTX *ctx) {
+  ctx->buf[0] = 0x67452301;
+  ctx->buf[1] = 0xefcdab89;
+  ctx->buf[2] = 0x98badcfe;
+  ctx->buf[3] = 0x10325476;
+
+  ctx->bits[0] = 0;
+  ctx->bits[1] = 0;
+}
+
+static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
+  register uint32_t a, b, c, d;
+
+  a = buf[0];
+  b = buf[1];
+  c = buf[2];
+  d = buf[3];
+
+  MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+  MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+  MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+  MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+  MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+  MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+  MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+  MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+  MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+  MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+  MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+  MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+  MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+  MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+  MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+  MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+  MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+  MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+  MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+  MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+  MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+  MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+  MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+  MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+  MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+  MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+  MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+  MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+  MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+  MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+  MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+  MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+  MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+  MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+  MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+  MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+  MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+  MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+  MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+  MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+  MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+  MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+  MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+  MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+  MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+  MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+  MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+  MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+  MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+  MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+  MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+  MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+  MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+  MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+  MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+  MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+  MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+  MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+  MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+  MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+  MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+  MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+  MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+  MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+  buf[0] += a;
+  buf[1] += b;
+  buf[2] += c;
+  buf[3] += d;
+}
+
+static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
+  uint32_t t;
+
+  t = ctx->bits[0];
+  if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
+    ctx->bits[1]++;
+  ctx->bits[1] += len >> 29;
+
+  t = (t >> 3) & 0x3f;
+
+  if (t) {
+    unsigned char *p = (unsigned char *) ctx->in + t;
+
+    t = 64 - t;
+    if (len < t) {
+      memcpy(p, buf, len);
+      return;
+    }
+    memcpy(p, buf, t);
+    byteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+    buf += t;
+    len -= t;
+  }
+
+  while (len >= 64) {
+    memcpy(ctx->in, buf, 64);
+    byteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+    buf += 64;
+    len -= 64;
+  }
+
+  memcpy(ctx->in, buf, len);
+}
+
+static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
+  unsigned count;
+  unsigned char *p;
+
+  count = (ctx->bits[0] >> 3) & 0x3F;
+
+  p = ctx->in + count;
+  *p++ = 0x80;
+  count = 64 - 1 - count;
+  if (count < 8) {
+    memset(p, 0, count);
+    byteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+    memset(ctx->in, 0, 56);
+  } else {
+    memset(p, 0, count - 8);
+  }
+  byteReverse(ctx->in, 14);
+
+  ((uint32_t *) ctx->in)[14] = ctx->bits[0];
+  ((uint32_t *) ctx->in)[15] = ctx->bits[1];
+
+  MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+  byteReverse((unsigned char *) ctx->buf, 4);
+  memcpy(digest, ctx->buf, 16);
+  memset((char *) ctx, 0, sizeof(*ctx));
+}
+#endif // !HAVE_MD5
+
+// Stringify binary data. Output buffer must be twice as big as input,
+// because each byte takes 2 bytes in string representation
+static void bin2str(char *to, const unsigned char *p, size_t len) {
+  static const char *hex = "0123456789abcdef";
+
+  for (; len--; p++) {
+    *to++ = hex[p[0] >> 4];
+    *to++ = hex[p[0] & 0x0f];
+  }
+  *to = '\0';
+}
+
+// Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes.
+void mg_md5(char *buf, ...) {
+  unsigned char hash[16];
+  const char *p;
+  va_list ap;
+  MD5_CTX ctx;
+
+  MD5Init(&ctx);
+
+  va_start(ap, buf);
+  while ((p = va_arg(ap, const char *)) != NULL) {
+    MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
+  }
+  va_end(ap);
+
+  MD5Final(hash, &ctx);
+  bin2str(buf, hash, sizeof(hash));
+}
+
+// Check the user's password, return 1 if OK
+static int check_password(const char *method, const char *ha1, const char *uri,
+                          const char *nonce, const char *nc, const char *cnonce,
+                          const char *qop, const char *response) {
+  char ha2[32 + 1], expected_response[32 + 1];
+
+  // Some of the parameters may be NULL
+  if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
+      qop == NULL || response == NULL) {
+    return 0;
+  }
+
+  // NOTE(lsm): due to a bug in MSIE, we do not compare the URI
+  // TODO(lsm): check for authentication timeout
+  if (// strcmp(dig->uri, c->ouri) != 0 ||
+      strlen(response) != 32
+      // || now - strtoul(dig->nonce, NULL, 10) > 3600
+      ) {
+    return 0;
+  }
+
+  mg_md5(ha2, method, ":", uri, NULL);
+  mg_md5(expected_response, ha1, ":", nonce, ":", nc,
+      ":", cnonce, ":", qop, ":", ha2, NULL);
+
+  return mg_strcasecmp(response, expected_response) == 0;
+}
+
+// Use the global passwords file, if specified by auth_gpass option,
+// or search for .htpasswd in the requested directory.
+static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
+  struct mg_context *ctx = conn->ctx;
+  char name[PATH_MAX];
+  const char *p, *e;
+  struct mgstat st;
+  FILE *fp;
+
+  if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
+    // Use global passwords file
+    fp =  mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
+    if (fp == NULL)
+      cry(fc(ctx), "fopen(%s): %s",
+          ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
+  } else if (!mg_stat(path, &st) && st.is_directory) {
+    (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
+        path, DIRSEP, PASSWORDS_FILE_NAME);
+    fp = mg_fopen(name, "r");
+  } else {
+     // Try to find .htpasswd in requested directory.
+    for (p = path, e = p + strlen(p) - 1; e > p; e--)
+      if (IS_DIRSEP_CHAR(*e))
+        break;
+    (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
+        (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME);
+    fp = mg_fopen(name, "r");
+  }
+
+  return fp;
+}
+
+// Parsed Authorization header
+struct ah {
+  char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
+};
+
+static int parse_auth_header(struct mg_connection *conn, char *buf,
+                             size_t buf_size, struct ah *ah) {
+  char *name, *value, *s;
+  const char *auth_header;
+
+  if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
+      mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
+    return 0;
+  }
+
+  // Make modifiable copy of the auth header
+  (void) mg_strlcpy(buf, auth_header + 7, buf_size);
+
+  s = buf;
+  (void) memset(ah, 0, sizeof(*ah));
+
+  // Parse authorization header
+  for (;;) {
+    // Gobble initial spaces
+    while (isspace(* (unsigned char *) s)) {
+      s++;
+    }
+    name = skip_quoted(&s, "=", " ", 0);
+    // Value is either quote-delimited, or ends at first comma or space.
+    if (s[0] == '\"') {
+      s++;
+      value = skip_quoted(&s, "\"", " ", '\\');
+      if (s[0] == ',') {
+        s++;
+      }
+    } else {
+      value = skip_quoted(&s, ", ", " ", 0);  // IE uses commas, FF uses spaces
+    }
+    if (*name == '\0') {
+      break;
+    }
+
+    if (!strcmp(name, "username")) {
+      ah->user = value;
+    } else if (!strcmp(name, "cnonce")) {
+      ah->cnonce = value;
+    } else if (!strcmp(name, "response")) {
+      ah->response = value;
+    } else if (!strcmp(name, "uri")) {
+      ah->uri = value;
+    } else if (!strcmp(name, "qop")) {
+      ah->qop = value;
+    } else if (!strcmp(name, "nc")) {
+      ah->nc = value;
+    } else if (!strcmp(name, "nonce")) {
+      ah->nonce = value;
+    }
+  }
+
+  // CGI needs it as REMOTE_USER
+  if (ah->user != NULL) {
+    conn->request_info.remote_user = mg_strdup(ah->user);
+  } else {
+    return 0;
+  }
+
+  return 1;
+}
+
+// Authorize against the opened passwords file. Return 1 if authorized.
+static int authorize(struct mg_connection *conn, FILE *fp) {
+  struct ah ah;
+  char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ];
+
+  if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
+    return 0;
+  }
+
+  // Loop over passwords file
+  while (fgets(line, sizeof(line), fp) != NULL) {
+    if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
+      continue;
+    }
+
+    if (!strcmp(ah.user, f_user) &&
+        !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
+      return check_password(
+            conn->request_info.request_method,
+            ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
+            ah.response);
+  }
+
+  return 0;
+}
+
+// Return 1 if request is authorised, 0 otherwise.
+static int check_authorization(struct mg_connection *conn, const char *path) {
+  FILE *fp;
+  char fname[PATH_MAX];
+  struct vec uri_vec, filename_vec;
+  const char *list;
+  int authorized;
+
+  fp = NULL;
+  authorized = 1;
+
+  list = conn->ctx->config[PROTECT_URI];
+  while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
+    if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
+      (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s",
+          filename_vec.len, filename_vec.ptr);
+      if ((fp = mg_fopen(fname, "r")) == NULL) {
+        cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
+      }
+      break;
+    }
+  }
+
+  if (fp == NULL) {
+    fp = open_auth_file(conn, path);
+  }
+
+  if (fp != NULL) {
+    authorized = authorize(conn, fp);
+    (void) fclose(fp);
+  }
+
+  return authorized;
+}
+
+static void send_authorization_request(struct mg_connection *conn) {
+  conn->request_info.status_code = 401;
+  (void) mg_printf(conn,
+      "HTTP/1.1 401 Unauthorized\r\n"
+      "Content-Length: 0\r\n"
+      "WWW-Authenticate: Digest qop=\"auth\", "
+      "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
+      conn->ctx->config[AUTHENTICATION_DOMAIN],
+      (unsigned long) time(NULL));
+}
+
+static int is_authorized_for_put(struct mg_connection *conn) {
+  FILE *fp;
+  int ret = 0;
+
+  fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
+    mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
+
+  if (fp != NULL) {
+    ret = authorize(conn, fp);
+    (void) fclose(fp);
+  }
+
+  return ret;
+}
+
+int mg_modify_passwords_file(const char *fname, const char *domain,
+                             const char *user, const char *pass) {
+  int found;
+  char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
+  FILE *fp, *fp2;
+
+  found = 0;
+  fp = fp2 = NULL;
+
+  // Regard empty password as no password - remove user record.
+  if (pass != NULL && pass[0] == '\0') {
+    pass = NULL;
+  }
+
+  (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
+
+  // Create the file if does not exist
+  if ((fp = mg_fopen(fname, "a+")) != NULL) {
+    (void) fclose(fp);
+  }
+
+  // Open the given file and temporary file
+  if ((fp = mg_fopen(fname, "r")) == NULL) {
+    return 0;
+  } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
+    fclose(fp);
+    return 0;
+  }
+
+  // Copy the stuff to temporary file
+  while (fgets(line, sizeof(line), fp) != NULL) {
+    if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
+      continue;
+    }
+
+    if (!strcmp(u, user) && !strcmp(d, domain)) {
+      found++;
+      if (pass != NULL) {
+        mg_md5(ha1, user, ":", domain, ":", pass, NULL);
+        fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
+      }
+    } else {
+      (void) fprintf(fp2, "%s", line);
+    }
+  }
+
+  // If new user, just add it
+  if (!found && pass != NULL) {
+    mg_md5(ha1, user, ":", domain, ":", pass, NULL);
+    (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
+  }
+
+  // Close files
+  (void) fclose(fp);
+  (void) fclose(fp2);
+
+  // Put the temp file in place of real file
+  (void) mg_remove(fname);
+  (void) mg_rename(tmp, fname);
+
+  return 1;
+}
+
+struct de {
+  struct mg_connection *conn;
+  char *file_name;
+  struct mgstat st;
+};
+
+static void url_encode(const char *src, char *dst, size_t dst_len) {
+  static const char *dont_escape = "._-$,;~()";
+  static const char *hex = "0123456789abcdef";
+  const char *end = dst + dst_len - 1;
+
+  for (; *src != '\0' && dst < end; src++, dst++) {
+    if (isalnum(*(const unsigned char *) src) ||
+        strchr(dont_escape, * (const unsigned char *) src) != NULL) {
+      *dst = *src;
+    } else if (dst + 2 < end) {
+      dst[0] = '%';
+      dst[1] = hex[(* (const unsigned char *) src) >> 4];
+      dst[2] = hex[(* (const unsigned char *) src) & 0xf];
+      dst += 2;
+    }
+  }
+
+  *dst = '\0';
+}
+
+static void print_dir_entry(struct de *de) {
+  char size[64], mod[64], href[PATH_MAX];
+
+  if (de->st.is_directory) {
+    (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
+  } else {
+     // We use (signed) cast below because MSVC 6 compiler cannot
+     // convert unsigned __int64 to double. Sigh.
+    if (de->st.size < 1024) {
+      (void) mg_snprintf(de->conn, size, sizeof(size),
+          "%lu", (unsigned long) de->st.size);
+    } else if (de->st.size < 1024 * 1024) {
+      (void) mg_snprintf(de->conn, size, sizeof(size),
+          "%.1fk", (double) de->st.size / 1024.0);
+    } else if (de->st.size < 1024 * 1024 * 1024) {
+      (void) mg_snprintf(de->conn, size, sizeof(size),
+          "%.1fM", (double) de->st.size / 1048576);
+    } else {
+      (void) mg_snprintf(de->conn, size, sizeof(size),
+          "%.1fG", (double) de->st.size / 1073741824);
+    }
+  }
+  (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
+  url_encode(de->file_name, href, sizeof(href));
+  de->conn->num_bytes_sent += mg_printf(de->conn,
+      "<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
+      "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
+      de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
+      de->file_name, de->st.is_directory ? "/" : "", mod, size);
+}
+
+// This function is called from send_directory() and used for
+// sorting directory entries by size, or name, or modification time.
+// On windows, __cdecl specification is needed in case if project is built
+// with __stdcall convention. qsort always requires __cdels callback.
+static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
+  const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
+  const char *query_string = a->conn->request_info.query_string;
+  int cmp_result = 0;
+
+  if (query_string == NULL) {
+    query_string = "na";
+  }
+
+  if (a->st.is_directory && !b->st.is_directory) {
+    return -1;  // Always put directories on top
+  } else if (!a->st.is_directory && b->st.is_directory) {
+    return 1;   // Always put directories on top
+  } else if (*query_string == 'n') {
+    cmp_result = strcmp(a->file_name, b->file_name);
+  } else if (*query_string == 's') {
+    cmp_result = a->st.size == b->st.size ? 0 :
+      a->st.size > b->st.size ? 1 : -1;
+  } else if (*query_string == 'd') {
+    cmp_result = a->st.mtime == b->st.mtime ? 0 :
+      a->st.mtime > b->st.mtime ? 1 : -1;
+  }
+
+  return query_string[1] == 'd' ? -cmp_result : cmp_result;
+}
+
+static int scan_directory(struct mg_connection *conn, const char *dir,
+                          void *data, void (*cb)(struct de *, void *)) {
+  char path[PATH_MAX];
+  struct dirent *dp;
+  DIR *dirp;
+  struct de de;
+
+  if ((dirp = opendir(dir)) == NULL) {
+    return 0;
+  } else {
+    de.conn = conn;
+
+    while ((dp = readdir(dirp)) != NULL) {
+      // Do not show current dir and passwords file
+      if (!strcmp(dp->d_name, ".") ||
+          !strcmp(dp->d_name, "..") ||
+          !strcmp(dp->d_name, PASSWORDS_FILE_NAME))
+        continue;
+
+      mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name);
+
+      // If we don't memset stat structure to zero, mtime will have
+      // garbage and strftime() will segfault later on in
+      // print_dir_entry(). memset is required only if mg_stat()
+      // fails. For more details, see
+      // http://code.google.com/p/mongoose/issues/detail?id=79
+      if (mg_stat(path, &de.st) != 0) {
+        memset(&de.st, 0, sizeof(de.st));
+      }
+      de.file_name = dp->d_name;
+
+      cb(&de, data);
+    }
+    (void) closedir(dirp);
+  }
+  return 1;
+}
+
+struct dir_scan_data {
+  struct de *entries;
+  int num_entries;
+  int arr_size;
+};
+
+static void dir_scan_callback(struct de *de, void *data) {
+  struct dir_scan_data *dsd = (struct dir_scan_data *) data;
+
+  if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) {
+    dsd->arr_size *= 2;
+    dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size *
+                                         sizeof(dsd->entries[0]));
+  }
+  if (dsd->entries == NULL) {
+    // TODO(lsm): propagate an error to the caller
+    dsd->num_entries = 0;
+  } else {
+    dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
+    dsd->entries[dsd->num_entries].st = de->st;
+    dsd->entries[dsd->num_entries].conn = de->conn;
+    dsd->num_entries++;
+  }
+}
+
+static void handle_directory_request(struct mg_connection *conn,
+                                     const char *dir) {
+  int i, sort_direction;
+  struct dir_scan_data data = { NULL, 0, 128 };
+
+  if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
+    send_http_error(conn, 500, "Cannot open directory",
+                    "Error: opendir(%s): %s", dir, strerror(ERRNO));
+    return;
+  }
+
+  sort_direction = conn->request_info.query_string != NULL &&
+    conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
+
+  conn->must_close = 1;
+  mg_printf(conn, "%s",
+            "HTTP/1.1 200 OK\r\n"
+            "Connection: close\r\n"
+            "Content-Type: text/html; charset=utf-8\r\n\r\n");
+
+  conn->num_bytes_sent += mg_printf(conn,
+      "<html><head><title>Index of %s</title>"
+      "<style>th {text-align: left;}</style></head>"
+      "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
+      "<tr><th><a href=\"?n%c\">Name</a></th>"
+      "<th><a href=\"?d%c\">Modified</a></th>"
+      "<th><a href=\"?s%c\">Size</a></th></tr>"
+      "<tr><td colspan=\"3\"><hr></td></tr>",
+      conn->request_info.uri, conn->request_info.uri,
+      sort_direction, sort_direction, sort_direction);
+
+  // Print first entry - link to a parent directory
+  conn->num_bytes_sent += mg_printf(conn,
+      "<tr><td><a href=\"%s%s\">%s</a></td>"
+      "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
+      conn->request_info.uri, "..", "Parent directory", "-", "-");
+
+  // Sort and print directory entries
+  qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
+        compare_dir_entries);
+  for (i = 0; i < data.num_entries; i++) {
+    print_dir_entry(&data.entries[i]);
+    free(data.entries[i].file_name);
+  }
+  free(data.entries);
+
+  conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
+  conn->request_info.status_code = 200;
+}
+
+// Send len bytes from the opened file to the client.
+static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
+  char buf[BUFSIZ];
+  int to_read, num_read, num_written;
+
+  while (len > 0) {
+    // Calculate how much to read from the file in the buffer
+    to_read = sizeof(buf);
+    if ((int64_t) to_read > len)
+      to_read = (int) len;
+
+    // Read from file, exit the loop on error
+    if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0)
+      break;
+
+    // Send read bytes to the client, exit the loop on error
+    if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read)
+      break;
+
+    // Both read and were successful, adjust counters
+    conn->num_bytes_sent += num_written;
+    len -= num_written;
+  }
+}
+
+static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
+  return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
+}
+
+static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
+  strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
+}
+
+static void handle_file_request(struct mg_connection *conn, const char *path,
+                                struct mgstat *stp) {
+  char date[64], lm[64], etag[64], range[64];
+  const char *msg = "OK", *hdr;
+  time_t curtime = time(NULL);
+  int64_t cl, r1, r2;
+  struct vec mime_vec;
+  FILE *fp;
+  int n;
+
+  get_mime_type(conn->ctx, path, &mime_vec);
+  cl = stp->size;
+  conn->request_info.status_code = 200;
+  range[0] = '\0';
+
+  if ((fp = mg_fopen(path, "rb")) == NULL) {
+    send_http_error(conn, 500, http_500_error,
+        "fopen(%s): %s", path, strerror(ERRNO));
+    return;
+  }
+  set_close_on_exec(fileno(fp));
+
+  // If Range: header specified, act accordingly
+  r1 = r2 = 0;
+  hdr = mg_get_header(conn, "Range");
+  if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
+    conn->request_info.status_code = 206;
+    (void) fseeko(fp, (off_t) r1, SEEK_SET);
+    cl = n == 2 ? r2 - r1 + 1: cl - r1;
+    (void) mg_snprintf(conn, range, sizeof(range),
+        "Content-Range: bytes "
+        "%" INT64_FMT "-%"
+        INT64_FMT "/%" INT64_FMT "\r\n",
+        r1, r1 + cl - 1, stp->size);
+    msg = "Partial Content";
+  }
+
+  // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
+  // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
+  gmt_time_string(date, sizeof(date), &curtime);
+  gmt_time_string(lm, sizeof(lm), &stp->mtime);
+  (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx",
+      (unsigned long) stp->mtime, (unsigned long) stp->size);
+
+  (void) mg_printf(conn,
+      "HTTP/1.1 %d %s\r\n"
+      "Date: %s\r\n"
+      "Last-Modified: %s\r\n"
+      "Etag: \"%s\"\r\n"
+      "Content-Type: %.*s\r\n"
+      "Content-Length: %" INT64_FMT "\r\n"
+      "Connection: %s\r\n"
+      "Accept-Ranges: bytes\r\n"
+      "%s\r\n",
+      conn->request_info.status_code, msg, date, lm, etag, (int) mime_vec.len,
+      mime_vec.ptr, cl, suggest_connection_header(conn), range);
+
+  if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
+    send_file_data(conn, fp, cl);
+  }
+  (void) fclose(fp);
+}
+
+void mg_send_file(struct mg_connection *conn, const char *path) {
+  struct mgstat st;
+  if (mg_stat(path, &st) == 0) {
+    handle_file_request(conn, path, &st);
+  } else {
+    send_http_error(conn, 404, "Not Found", "%s", "File not found");
+  }
+}
+
+
+// Parse HTTP headers from the given buffer, advance buffer to the point
+// where parsing stopped.
+static void parse_http_headers(char **buf, struct mg_request_info *ri) {
+  int i;
+
+  for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
+    ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
+    ri->http_headers[i].value = skip(buf, "\r\n");
+    if (ri->http_headers[i].name[0] == '\0')
+      break;
+    ri->num_headers = i + 1;
+  }
+}
+
+static int is_valid_http_method(const char *method) {
+  return !strcmp(method, "GET") || !strcmp(method, "POST") ||
+    !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
+    !strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
+    !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND");
+}
+
+// Parse HTTP request, fill in mg_request_info structure.
+static int parse_http_request(char *buf, struct mg_request_info *ri) {
+  int status = 0;
+
+  // RFC says that all initial whitespaces should be ingored
+  while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
+    buf++;
+  }
+
+  ri->request_method = skip(&buf, " ");
+  ri->uri = skip(&buf, " ");
+  ri->http_version = skip(&buf, "\r\n");
+
+  if (is_valid_http_method(ri->request_method) &&
+      strncmp(ri->http_version, "HTTP/", 5) == 0) {
+    ri->http_version += 5;   // Skip "HTTP/"
+    parse_http_headers(&buf, ri);
+    status = 1;
+  }
+
+  return status;
+}
+
+// Keep reading the input (either opened file descriptor fd, or socket sock,
+// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
+// buffer (which marks the end of HTTP request). Buffer buf may already
+// have some data. The length of the data is stored in nread.
+// Upon every read operation, increase nread by the number of bytes read.
+static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
+                        int *nread) {
+  int request_len, n = 0;
+
+  do {
+    request_len = get_request_len(buf, *nread);
+    if (request_len == 0 &&
+        (n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread)) > 0) {
+      *nread += n;
+    }
+  } while (*nread < bufsiz && request_len == 0 && n > 0);
+
+  return request_len;
+}
+
+// For given directory path, substitute it to valid index file.
+// Return 0 if index file has been found, -1 if not found.
+// If the file is found, it's stats is returned in stp.
+static int substitute_index_file(struct mg_connection *conn, char *path,
+                                 size_t path_len, struct mgstat *stp) {
+  const char *list = conn->ctx->config[INDEX_FILES];
+  struct mgstat st;
+  struct vec filename_vec;
+  size_t n = strlen(path);
+  int found = 0;
+
+  // The 'path' given to us points to the directory. Remove all trailing
+  // directory separator characters from the end of the path, and
+  // then append single directory separator character.
+  while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
+    n--;
+  }
+  path[n] = DIRSEP;
+
+  // Traverse index files list. For each entry, append it to the given
+  // path and see if the file exists. If it exists, break the loop
+  while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
+
+    // Ignore too long entries that may overflow path buffer
+    if (filename_vec.len > path_len - (n + 2))
+      continue;
+
+    // Prepare full path to the index file
+    (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
+
+    // Does it exist?
+    if (mg_stat(path, &st) == 0) {
+      // Yes it does, break the loop
+      *stp = st;
+      found = 1;
+      break;
+    }
+  }
+
+  // If no index file exists, restore directory path
+  if (!found) {
+    path[n] = '\0';
+  }
+
+  return found;
+}
+
+// Return True if we should reply 304 Not Modified.
+static int is_not_modified(const struct mg_connection *conn,
+                           const struct mgstat *stp) {
+  const char *ims = mg_get_header(conn, "If-Modified-Since");
+  return ims != NULL && stp->mtime <= parse_date_string(ims);
+}
+
+static int forward_body_data(struct mg_connection *conn, FILE *fp,
+                             SOCKET sock, SSL *ssl) {
+  const char *expect, *buffered;
+  char buf[BUFSIZ];
+  int to_read, nread, buffered_len, success = 0;
+
+  expect = mg_get_header(conn, "Expect");
+  assert(fp != NULL);
+
+  if (conn->content_len == -1) {
+    send_http_error(conn, 411, "Length Required", "");
+  } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
+    send_http_error(conn, 417, "Expectation Failed", "");
+  } else {
+    if (expect != NULL) {
+      (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
+    }
+
+    buffered = conn->buf + conn->request_len;
+    buffered_len = conn->data_len - conn->request_len;
+    assert(buffered_len >= 0);
+    assert(conn->consumed_content == 0);
+
+    if (buffered_len > 0) {
+      if ((int64_t) buffered_len > conn->content_len) {
+        buffered_len = (int) conn->content_len;
+      }
+      push(fp, sock, ssl, buffered, (int64_t) buffered_len);
+      conn->consumed_content += buffered_len;
+    }
+
+    while (conn->consumed_content < conn->content_len) {
+      to_read = sizeof(buf);
+      if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
+        to_read = (int) (conn->content_len - conn->consumed_content);
+      }
+      nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read);
+      if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
+        break;
+      }
+      conn->consumed_content += nread;
+    }
+
+    if (conn->consumed_content == conn->content_len) {
+      success = 1;
+    }
+
+    // Each error code path in this function must send an error
+    if (!success) {
+      send_http_error(conn, 577, http_500_error, "");
+    }
+  }
+
+  return success;
+}
+
+#if !defined(NO_CGI)
+// This structure helps to create an environment for the spawned CGI program.
+// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
+// last element must be NULL.
+// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
+// strings must reside in a contiguous buffer. The end of the buffer is
+// marked by two '\0' characters.
+// We satisfy both worlds: we create an envp array (which is vars), all
+// entries are actually pointers inside buf.
+struct cgi_env_block {
+  struct mg_connection *conn;
+  char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
+  int len; // Space taken
+  char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
+  int nvars; // Number of variables
+};
+
+// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
+// pointer into the vars array.
+static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
+  int n, space;
+  char *added;
+  va_list ap;
+
+  // Calculate how much space is left in the buffer
+  space = sizeof(block->buf) - block->len - 2;
+  assert(space >= 0);
+
+  // Make a pointer to the free space int the buffer
+  added = block->buf + block->len;
+
+  // Copy VARIABLE=VALUE\0 string into the free space
+  va_start(ap, fmt);
+  n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
+  va_end(ap);
+
+  // Make sure we do not overflow buffer and the envp array
+  if (n > 0 && n < space &&
+      block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
+    // Append a pointer to the added string into the envp array
+    block->vars[block->nvars++] = block->buf + block->len;
+    // Bump up used length counter. Include \0 terminator
+    block->len += n + 1;
+  }
+
+  return added;
+}
+
+static void prepare_cgi_environment(struct mg_connection *conn,
+                                    const char *prog,
+                                    struct cgi_env_block *blk) {
+  const char *s, *slash;
+  struct vec var_vec;
+  char *p, src_addr[20];
+  int  i;
+
+  blk->len = blk->nvars = 0;
+  blk->conn = conn;
+  sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+
+  addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
+  addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
+  addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
+
+  // Prepare the environment block
+  addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
+  addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
+  addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
+
+  // TODO(lsm): fix this for IPv6 case
+  addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port));
+
+  addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
+  addenv(blk, "REMOTE_ADDR=%s", src_addr);
+  addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
+  addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
+
+  // SCRIPT_NAME
+  assert(conn->request_info.uri[0] == '/');
+  slash = strrchr(conn->request_info.uri, '/');
+  if ((s = strrchr(prog, '/')) == NULL)
+    s = prog;
+  addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri,
+         conn->request_info.uri, s);
+
+  addenv(blk, "SCRIPT_FILENAME=%s", prog);
+  addenv(blk, "PATH_TRANSLATED=%s", prog);
+  addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
+
+  if ((s = mg_get_header(conn, "Content-Type")) != NULL)
+    addenv(blk, "CONTENT_TYPE=%s", s);
+
+  if (conn->request_info.query_string != NULL)
+    addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
+
+  if ((s = mg_get_header(conn, "Content-Length")) != NULL)
+    addenv(blk, "CONTENT_LENGTH=%s", s);
+
+  if ((s = getenv("PATH")) != NULL)
+    addenv(blk, "PATH=%s", s);
+
+  if (conn->path_info != NULL) {
+    addenv(blk, "PATH_INFO=%s", conn->path_info);
+  }
+
+#if defined(_WIN32)
+  if ((s = getenv("COMSPEC")) != NULL) {
+    addenv(blk, "COMSPEC=%s", s);
+  }
+  if ((s = getenv("SYSTEMROOT")) != NULL) {
+    addenv(blk, "SYSTEMROOT=%s", s);
+  }
+  if ((s = getenv("SystemDrive")) != NULL) {
+    addenv(blk, "SystemDrive=%s", s);
+  }
+#else
+  if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
+    addenv(blk, "LD_LIBRARY_PATH=%s", s);
+#endif // _WIN32
+
+  if ((s = getenv("PERLLIB")) != NULL)
+    addenv(blk, "PERLLIB=%s", s);
+
+  if (conn->request_info.remote_user != NULL) {
+    addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
+    addenv(blk, "%s", "AUTH_TYPE=Digest");
+  }
+
+  // Add all headers as HTTP_* variables
+  for (i = 0; i < conn->request_info.num_headers; i++) {
+    p = addenv(blk, "HTTP_%s=%s",
+        conn->request_info.http_headers[i].name,
+        conn->request_info.http_headers[i].value);
+
+    // Convert variable name into uppercase, and change - to _
+    for (; *p != '=' && *p != '\0'; p++) {
+      if (*p == '-')
+        *p = '_';
+      *p = (char) toupper(* (unsigned char *) p);
+    }
+  }
+
+  // Add user-specified variables
+  s = conn->ctx->config[CGI_ENVIRONMENT];
+  while ((s = next_option(s, &var_vec, NULL)) != NULL) {
+    addenv(blk, "%.*s", var_vec.len, var_vec.ptr);
+  }
+
+  blk->vars[blk->nvars++] = NULL;
+  blk->buf[blk->len++] = '\0';
+
+  assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
+  assert(blk->len > 0);
+  assert(blk->len < (int) sizeof(blk->buf));
+}
+
+static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
+  int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
+  const char *status, *status_text;
+  char buf[16384], *pbuf, dir[PATH_MAX], *p;
+  struct mg_request_info ri;
+  struct cgi_env_block blk;
+  FILE *in, *out;
+  pid_t pid;
+
+  prepare_cgi_environment(conn, prog, &blk);
+
+  // CGI must be executed in its own directory. 'dir' must point to the
+  // directory containing executable program, 'p' must point to the
+  // executable program name relative to 'dir'.
+  (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
+  if ((p = strrchr(dir, DIRSEP)) != NULL) {
+    *p++ = '\0';
+  } else {
+    dir[0] = '.', dir[1] = '\0';
+    p = (char *) prog;
+  }
+
+  pid = (pid_t) -1;
+  fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
+  in = out = NULL;
+
+  if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
+    send_http_error(conn, 500, http_500_error,
+        "Cannot create CGI pipe: %s", strerror(ERRNO));
+    goto done;
+  } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
+          fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
+    goto done;
+  } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
+      (out = fdopen(fd_stdout[0], "rb")) == NULL) {
+    send_http_error(conn, 500, http_500_error,
+        "fopen: %s", strerror(ERRNO));
+    goto done;
+  }
+
+  setbuf(in, NULL);
+  setbuf(out, NULL);
+
+  // spawn_process() must close those!
+  // If we don't mark them as closed, close() attempt before
+  // return from this function throws an exception on Windows.
+  // Windows does not like when closed descriptor is closed again.
+  fd_stdin[0] = fd_stdout[1] = -1;
+
+  // Send POST data to the CGI process if needed
+  if (!strcmp(conn->request_info.request_method, "POST") &&
+      !forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
+    goto done;
+  }
+
+  // Now read CGI reply into a buffer. We need to set correct
+  // status code, thus we need to see all HTTP headers first.
+  // Do not send anything back to client, until we buffer in all
+  // HTTP headers.
+  data_len = 0;
+  headers_len = read_request(out, INVALID_SOCKET, NULL,
+                             buf, sizeof(buf), &data_len);
+  if (headers_len <= 0) {
+    send_http_error(conn, 500, http_500_error,
+                    "CGI program sent malformed HTTP headers: [%.*s]",
+                    data_len, buf);
+    goto done;
+  }
+  pbuf = buf;
+  buf[headers_len - 1] = '\0';
+  parse_http_headers(&pbuf, &ri);
+
+  // Make up and send the status line
+  status_text = "OK";
+  if ((status = get_header(&ri, "Status")) != NULL) {
+    conn->request_info.status_code = atoi(status);
+    status_text = status;
+    while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') {
+      status_text++;
+    }
+  } else if (get_header(&ri, "Location") != NULL) {
+    conn->request_info.status_code = 302;
+  } else {
+    conn->request_info.status_code = 200;
+  }
+  if (get_header(&ri, "Connection") != NULL &&
+      !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) {
+    conn->must_close = 1;
+  }
+  (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->request_info.status_code,
+                   status_text);
+
+  // Send headers
+  for (i = 0; i < ri.num_headers; i++) {
+    mg_printf(conn, "%s: %s\r\n",
+              ri.http_headers[i].name, ri.http_headers[i].value);
+  }
+  (void) mg_write(conn, "\r\n", 2);
+
+  // Send chunk of data that may be read after the headers
+  conn->num_bytes_sent += mg_write(conn, buf + headers_len,
+                                   (size_t)(data_len - headers_len));
+
+  // Read the rest of CGI output and send to the client
+  send_file_data(conn, out, INT64_MAX);
+
+done:
+  if (pid != (pid_t) -1) {
+    kill(pid, SIGKILL);
+  }
+  if (fd_stdin[0] != -1) {
+    (void) close(fd_stdin[0]);
+  }
+  if (fd_stdout[1] != -1) {
+    (void) close(fd_stdout[1]);
+  }
+
+  if (in != NULL) {
+    (void) fclose(in);
+  } else if (fd_stdin[1] != -1) {
+    (void) close(fd_stdin[1]);
+  }
+
+  if (out != NULL) {
+    (void) fclose(out);
+  } else if (fd_stdout[0] != -1) {
+    (void) close(fd_stdout[0]);
+  }
+}
+#endif // !NO_CGI
+
+// For a given PUT path, create all intermediate subdirectories
+// for given path. Return 0 if the path itself is a directory,
+// or -1 on error, 1 if OK.
+static int put_dir(const char *path) {
+  char buf[PATH_MAX];
+  const char *s, *p;
+  struct mgstat st;
+  int len, res = 1;
+
+  for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) {
+    len = p - path;
+    if (len >= (int) sizeof(buf)) {
+      res = -1;
+      break;
+    }
+    memcpy(buf, path, len);
+    buf[len] = '\0';
+
+    // Try to create intermediate directory
+    DEBUG_TRACE(("mkdir(%s)", buf));
+    if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
+      res = -1;
+      break;
+    }
+
+    // Is path itself a directory?
+    if (p[1] == '\0') {
+      res = 0;
+    }
+  }
+
+  return res;
+}
+
+static void put_file(struct mg_connection *conn, const char *path) {
+  struct mgstat st;
+  const char *range;
+  int64_t r1, r2;
+  FILE *fp;
+  int rc;
+
+  conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
+
+  if ((rc = put_dir(path)) == 0) {
+    mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
+  } else if (rc == -1) {
+    send_http_error(conn, 500, http_500_error,
+        "put_dir(%s): %s", path, strerror(ERRNO));
+  } else if ((fp = mg_fopen(path, "wb+")) == NULL) {
+    send_http_error(conn, 500, http_500_error,
+        "fopen(%s): %s", path, strerror(ERRNO));
+  } else {
+    set_close_on_exec(fileno(fp));
+    range = mg_get_header(conn, "Content-Range");
+    r1 = r2 = 0;
+    if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
+      conn->request_info.status_code = 206;
+      // TODO(lsm): handle seek error
+      (void) fseeko(fp, (off_t) r1, SEEK_SET);
+    }
+    if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
+      (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
+          conn->request_info.status_code);
+    (void) fclose(fp);
+  }
+}
+
+static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
+
+static void do_ssi_include(struct mg_connection *conn, const char *ssi,
+                           char *tag, int include_level) {
+  char file_name[BUFSIZ], path[PATH_MAX], *p;
+  FILE *fp;
+
+  // sscanf() is safe here, since send_ssi_file() also uses buffer
+  // of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ.
+  if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
+    // File name is relative to the webserver root
+    (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
+        conn->ctx->config[DOCUMENT_ROOT], DIRSEP, file_name);
+  } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
+    // File name is relative to the webserver working directory
+    // or it is absolute system path
+    (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
+  } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
+    // File name is relative to the currect document
+    (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
+    if ((p = strrchr(path, DIRSEP)) != NULL) {
+      p[1] = '\0';
+    }
+    (void) mg_snprintf(conn, path + strlen(path),
+        sizeof(path) - strlen(path), "%s", file_name);
+  } else {
+    cry(conn, "Bad SSI #include: [%s]", tag);
+    return;
+  }
+
+  if ((fp = mg_fopen(path, "rb")) == NULL) {
+    cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
+        tag, path, strerror(ERRNO));
+  } else {
+    set_close_on_exec(fileno(fp));
+    if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
+                     strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) {
+      send_ssi_file(conn, path, fp, include_level + 1);
+    } else {
+      send_file_data(conn, fp, INT64_MAX);
+    }
+    (void) fclose(fp);
+  }
+}
+
+#if !defined(NO_POPEN)
+static void do_ssi_exec(struct mg_connection *conn, char *tag) {
+  char cmd[BUFSIZ];
+  FILE *fp;
+
+  if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
+    cry(conn, "Bad SSI #exec: [%s]", tag);
+  } else if ((fp = popen(cmd, "r")) == NULL) {
+    cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
+  } else {
+    send_file_data(conn, fp, INT64_MAX);
+    (void) pclose(fp);
+  }
+}
+#endif // !NO_POPEN
+
+static void send_ssi_file(struct mg_connection *conn, const char *path,
+                          FILE *fp, int include_level) {
+  char buf[BUFSIZ];
+  int ch, len, in_ssi_tag;
+
+  if (include_level > 10) {
+    cry(conn, "SSI #include level is too deep (%s)", path);
+    return;
+  }
+
+  in_ssi_tag = 0;
+  len = 0;
+
+  while ((ch = fgetc(fp)) != EOF) {
+    if (in_ssi_tag && ch == '>') {
+      in_ssi_tag = 0;
+      buf[len++] = (char) ch;
+      buf[len] = '\0';
+      assert(len <= (int) sizeof(buf));
+      if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
+        // Not an SSI tag, pass it
+        (void) mg_write(conn, buf, (size_t)len);
+      } else {
+        if (!memcmp(buf + 5, "include", 7)) {
+          do_ssi_include(conn, path, buf + 12, include_level);
+#if !defined(NO_POPEN)
+        } else if (!memcmp(buf + 5, "exec", 4)) {
+          do_ssi_exec(conn, buf + 9);
+#endif // !NO_POPEN
+        } else {
+          cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
+        }
+      }
+      len = 0;
+    } else if (in_ssi_tag) {
+      if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
+        // Not an SSI tag
+        in_ssi_tag = 0;
+      } else if (len == (int) sizeof(buf) - 2) {
+        cry(conn, "%s: SSI tag is too large", path);
+        len = 0;
+      }
+      buf[len++] = ch & 0xff;
+    } else if (ch == '<') {
+      in_ssi_tag = 1;
+      if (len > 0) {
+        (void) mg_write(conn, buf, (size_t)len);
+      }
+      len = 0;
+      buf[len++] = ch & 0xff;
+    } else {
+      buf[len++] = ch & 0xff;
+      if (len == (int) sizeof(buf)) {
+        (void) mg_write(conn, buf, (size_t)len);
+        len = 0;
+      }
+    }
+  }
+
+  // Send the rest of buffered data
+  if (len > 0) {
+    (void) mg_write(conn, buf, (size_t)len);
+  }
+}
+
+static void handle_ssi_file_request(struct mg_connection *conn,
+                                    const char *path) {
+  FILE *fp;
+
+  if ((fp = mg_fopen(path, "rb")) == NULL) {
+    send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
+                    strerror(ERRNO));
+  } else {
+    conn->must_close = 1;
+    set_close_on_exec(fileno(fp));
+    mg_printf(conn, "HTTP/1.1 200 OK\r\n"
+              "Content-Type: text/html\r\nConnection: %s\r\n\r\n",
+              suggest_connection_header(conn));
+    send_ssi_file(conn, path, fp, 0);
+    (void) fclose(fp);
+  }
+}
+
+static void send_options(struct mg_connection *conn) {
+  conn->request_info.status_code = 200;
+
+  (void) mg_printf(conn,
+      "HTTP/1.1 200 OK\r\n"
+      "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n"
+      "DAV: 1\r\n\r\n");
+}
+
+// Writes PROPFIND properties for a collection element
+static void print_props(struct mg_connection *conn, const char* uri,
+                        struct mgstat* st) {
+  char mtime[64];
+  gmt_time_string(mtime, sizeof(mtime), &st->mtime);
+  conn->num_bytes_sent += mg_printf(conn,
+      "<d:response>"
+       "<d:href>%s</d:href>"
+       "<d:propstat>"
+        "<d:prop>"
+         "<d:resourcetype>%s</d:resourcetype>"
+         "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
+         "<d:getlastmodified>%s</d:getlastmodified>"
+        "</d:prop>"
+        "<d:status>HTTP/1.1 200 OK</d:status>"
+       "</d:propstat>"
+      "</d:response>\n",
+      uri,
+      st->is_directory ? "<d:collection/>" : "",
+      st->size,
+      mtime);
+}
+
+static void print_dav_dir_entry(struct de *de, void *data) {
+  char href[PATH_MAX];
+  struct mg_connection *conn = (struct mg_connection *) data;
+  mg_snprintf(conn, href, sizeof(href), "%s%s",
+              conn->request_info.uri, de->file_name);
+  print_props(conn, href, &de->st);
+}
+
+static void handle_propfind(struct mg_connection *conn, const char* path,
+                            struct mgstat* st) {
+  const char *depth = mg_get_header(conn, "Depth");
+
+  conn->must_close = 1;
+  conn->request_info.status_code = 207;
+  mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n"
+            "Connection: close\r\n"
+            "Content-Type: text/xml; charset=utf-8\r\n\r\n");
+
+  conn->num_bytes_sent += mg_printf(conn,
+      "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+      "<d:multistatus xmlns:d='DAV:'>\n");
+
+  // Print properties for the requested resource itself
+  print_props(conn, conn->request_info.uri, st);
+
+  // If it is a directory, print directory entries too if Depth is not 0
+  if (st->is_directory &&
+      !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") &&
+      (depth == NULL || strcmp(depth, "0") != 0)) {
+    scan_directory(conn, path, conn, &print_dav_dir_entry);
+  }
+
+  conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>");
+}
+
+// This is the heart of the Mongoose's logic.
+// This function is called when the request is read, parsed and validated,
+// and Mongoose must decide what action to take: serve a file, or
+// a directory, or call embedded function, etcetera.
+static void handle_request(struct mg_connection *conn) {
+  struct mg_request_info *ri = &conn->request_info;
+  char path[PATH_MAX];
+  int stat_result, uri_len;
+  struct mgstat st;
+
+  if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
+    * conn->request_info.query_string++ = '\0';
+  }
+  uri_len = strlen(ri->uri);
+  url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
+  remove_double_dots_and_double_slashes(ri->uri);
+  stat_result = convert_uri_to_file_name(conn, path, sizeof(path), &st);
+
+  DEBUG_TRACE(("%s", ri->uri));
+  if (!check_authorization(conn, path)) {
+    send_authorization_request(conn);
+  } else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
+    // Do nothing, callback has served the request
+  } else if (!strcmp(ri->request_method, "OPTIONS")) {
+    send_options(conn);
+  } else if (strstr(path, PASSWORDS_FILE_NAME)) {
+    // Do not allow to view passwords files
+    send_http_error(conn, 403, "Forbidden", "Access Forbidden");
+  } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
+    send_http_error(conn, 404, "Not Found", "Not Found");
+  } else if ((!strcmp(ri->request_method, "PUT") ||
+        !strcmp(ri->request_method, "DELETE")) &&
+      (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
+       !is_authorized_for_put(conn))) {
+    send_authorization_request(conn);
+  } else if (!strcmp(ri->request_method, "PUT")) {
+    put_file(conn, path);
+  } else if (!strcmp(ri->request_method, "DELETE")) {
+    if (mg_remove(path) == 0) {
+      send_http_error(conn, 200, "OK", "");
+    } else {
+      send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
+                      strerror(ERRNO));
+    }
+  } else if (stat_result != 0) {
+    send_http_error(conn, 404, "Not Found", "%s", "File not found");
+  } else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
+    (void) mg_printf(conn,
+        "HTTP/1.1 301 Moved Permanently\r\n"
+        "Location: %s/\r\n\r\n", ri->uri);
+  } else if (!strcmp(ri->request_method, "PROPFIND")) {
+    handle_propfind(conn, path, &st);
+  } else if (st.is_directory &&
+             !substitute_index_file(conn, path, sizeof(path), &st)) {
+    if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
+      handle_directory_request(conn, path);
+    } else {
+      send_http_error(conn, 403, "Directory Listing Denied",
+          "Directory listing denied");
+    }
+#if !defined(NO_CGI)
+  } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
+                          strlen(conn->ctx->config[CGI_EXTENSIONS]),
+                          path) > 0) {
+    if (strcmp(ri->request_method, "POST") &&
+        strcmp(ri->request_method, "GET")) {
+      send_http_error(conn, 501, "Not Implemented",
+                      "Method %s is not implemented", ri->request_method);
+    } else {
+      handle_cgi_request(conn, path);
+    }
+#endif // !NO_CGI
+  } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
+                          strlen(conn->ctx->config[SSI_EXTENSIONS]),
+                          path) > 0) {
+    handle_ssi_file_request(conn, path);
+  } else if (is_not_modified(conn, &st)) {
+    send_http_error(conn, 304, "Not Modified", "");
+  } else {
+    handle_file_request(conn, path, &st);
+  }
+}
+
+static void close_all_listening_sockets(struct mg_context *ctx) {
+  struct socket *sp, *tmp;
+  for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
+    tmp = sp->next;
+    (void) closesocket(sp->sock);
+    free(sp);
+  }
+}
+
+// Valid listening port specification is: [ip_address:]port[s]
+// Examples: 80, 443s, 127.0.0.1:3128,1.2.3.4:8080s
+// TODO(lsm): add parsing of the IPv6 address
+static int parse_port_string(const struct vec *vec, struct socket *so) {
+  int a, b, c, d, port, len;
+
+  // MacOS needs that. If we do not zero it, subsequent bind() will fail.
+  // Also, all-zeroes in the socket address means binding to all addresses
+  // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
+  memset(so, 0, sizeof(*so));
+
+  if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
+    // Bind to a specific IPv4 address
+    so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
+  } else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 ||
+             len <= 0 ||
+             len > (int) vec->len ||
+             (vec->ptr[len] && vec->ptr[len] != 's' && vec->ptr[len] != ',')) {
+    return 0;
+  }
+
+  so->is_ssl = vec->ptr[len] == 's';
+#if defined(USE_IPV6)
+  so->lsa.sin6.sin6_family = AF_INET6;
+  so->lsa.sin6.sin6_port = htons((uint16_t) port);
+#else
+  so->lsa.sin.sin_family = AF_INET;
+  so->lsa.sin.sin_port = htons((uint16_t) port);
+#endif
+
+  return 1;
+}
+
+static int set_ports_option(struct mg_context *ctx) {
+  const char *list = ctx->config[LISTENING_PORTS];
+  int on = 1, success = 1;
+  SOCKET sock;
+  struct vec vec;
+  struct socket so, *listener;
+
+  while (success && (list = next_option(list, &vec, NULL)) != NULL) {
+    if (!parse_port_string(&vec, &so)) {
+      cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
+          __func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
+      success = 0;
+    } else if (so.is_ssl && ctx->ssl_ctx == NULL) {
+      cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?");
+      success = 0;
+    } else if ((sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) ==
+               INVALID_SOCKET ||
+#if !defined(_WIN32)
+               // On Windows, SO_REUSEADDR is recommended only for
+               // broadcast UDP sockets
+               setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on,
+                          sizeof(on)) != 0 ||
+#endif // !_WIN32
+               // Set TCP keep-alive. This is needed because if HTTP-level
+               // keep-alive is enabled, and client resets the connection,
+               // server won't get TCP FIN or RST and will keep the connection
+               // open forever. With TCP keep-alive, next keep-alive
+               // handshake will figure out that the client is down and
+               // will close the server end.
+               // Thanks to Igor Klopov who suggested the patch.
+               setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on,
+                          sizeof(on)) != 0 ||
+               bind(sock, &so.lsa.sa, sizeof(so.lsa)) != 0 ||
+               listen(sock, 100) != 0) {
+      closesocket(sock);
+      cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
+          vec.len, vec.ptr, strerror(ERRNO));
+      success = 0;
+    } else if ((listener = (struct socket *)
+                calloc(1, sizeof(*listener))) == NULL) {
+      closesocket(sock);
+      cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
+      success = 0;
+    } else {
+      *listener = so;
+      listener->sock = sock;
+      set_close_on_exec(listener->sock);
+      listener->next = ctx->listening_sockets;
+      ctx->listening_sockets = listener;
+    }
+  }
+
+  if (!success) {
+    close_all_listening_sockets(ctx);
+  }
+
+  return success;
+}
+
+static void log_header(const struct mg_connection *conn, const char *header,
+                       FILE *fp) {
+  const char *header_value;
+
+  if ((header_value = mg_get_header(conn, header)) == NULL) {
+    (void) fprintf(fp, "%s", " -");
+  } else {
+    (void) fprintf(fp, " \"%s\"", header_value);
+  }
+}
+
+static void log_access(const struct mg_connection *conn) {
+  const struct mg_request_info *ri;
+  FILE *fp;
+  char date[64], src_addr[20];
+
+  fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ?  NULL :
+    mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
+
+  if (fp == NULL)
+    return;
+
+  strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
+           localtime(&conn->birth_time));
+
+  ri = &conn->request_info;
+  flockfile(fp);
+
+  sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+  fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
+          src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date,
+          ri->request_method ? ri->request_method : "-",
+          ri->uri ? ri->uri : "-", ri->http_version,
+          conn->request_info.status_code, conn->num_bytes_sent);
+  log_header(conn, "Referer", fp);
+  log_header(conn, "User-Agent", fp);
+  fputc('\n', fp);
+  fflush(fp);
+
+  funlockfile(fp);
+  fclose(fp);
+}
+
+static int isbyte(int n) {
+  return n >= 0 && n <= 255;
+}
+
+// Verify given socket address against the ACL.
+// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
+static int check_acl(struct mg_context *ctx, const union usa *usa) {
+  int a, b, c, d, n, mask, allowed;
+  char flag;
+  uint32_t acl_subnet, acl_mask, remote_ip;
+  struct vec vec;
+  const char *list = ctx->config[ACCESS_CONTROL_LIST];
+
+  if (list == NULL) {
+    return 1;
+  }
+
+  (void) memcpy(&remote_ip, &usa->sin.sin_addr, sizeof(remote_ip));
+
+  // If any ACL is set, deny by default
+  allowed = '-';
+
+  while ((list = next_option(list, &vec, NULL)) != NULL) {
+    mask = 32;
+
+    if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) {
+      cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
+      return -1;
+    } else if (flag != '+' && flag != '-') {
+      cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr);
+      return -1;
+    } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
+      cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr);
+      return -1;
+    } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) {
+      // Do nothing, no mask specified
+    } else if (mask < 0 || mask > 32) {
+      cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr);
+      return -1;
+    }
+
+    acl_subnet = (a << 24) | (b << 16) | (c << 8) | d;
+    acl_mask = mask ? 0xffffffffU << (32 - mask) : 0;
+
+    if (acl_subnet == (ntohl(remote_ip) & acl_mask)) {
+      allowed = flag;
+    }
+  }
+
+  return allowed == '+';
+}
+
+static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
+  FD_SET(fd, set);
+  if (fd > (SOCKET) *max_fd) {
+    *max_fd = (int) fd;
+  }
+}
+
+#if !defined(_WIN32)
+static int set_uid_option(struct mg_context *ctx) {
+  struct passwd *pw;
+  const char *uid = ctx->config[RUN_AS_USER];
+  int success = 0;
+
+  if (uid == NULL) {
+    success = 1;
+  } else {
+    if ((pw = getpwnam(uid)) == NULL) {
+      cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
+    } else if (setgid(pw->pw_gid) == -1) {
+      cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
+    } else if (setuid(pw->pw_uid) == -1) {
+      cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
+    } else {
+      success = 1;
+    }
+  }
+
+  return success;
+}
+#endif // !_WIN32
+
+#if !defined(NO_SSL)
+static pthread_mutex_t *ssl_mutexes;
+
+// Return OpenSSL error message
+static const char *ssl_error(void) {
+  unsigned long err;
+  err = ERR_get_error();
+  return err == 0 ? "" : ERR_error_string(err, NULL);
+}
+
+static void ssl_locking_callback(int mode, int mutex_num, const char *file,
+                                 int line) {
+  line = 0;    // Unused
+  file = NULL; // Unused
+
+  if (mode & CRYPTO_LOCK) {
+    (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
+  } else {
+    (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
+  }
+}
+
+static unsigned long ssl_id_callback(void) {
+  return (unsigned long) pthread_self();
+}
+
+#if !defined(NO_SSL_DL)
+static int load_dll(struct mg_context *ctx, const char *dll_name,
+                    struct ssl_func *sw) {
+  union {void *p; void (*fp)(void);} u;
+  void  *dll_handle;
+  struct ssl_func *fp;
+
+  if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
+    cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
+    return 0;
+  }
+
+  for (fp = sw; fp->name != NULL; fp++) {
+#ifdef _WIN32
+    // GetProcAddress() returns pointer to function
+    u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
+#else
+    // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to
+    // function pointers. We need to use a union to make a cast.
+    u.p = dlsym(dll_handle, fp->name);
+#endif // _WIN32
+    if (u.fp == NULL) {
+      cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
+      return 0;
+    } else {
+      fp->ptr = u.fp;
+    }
+  }
+
+  return 1;
+}
+#endif // NO_SSL_DL
+
+// Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
+static int set_ssl_option(struct mg_context *ctx) {
+  struct mg_request_info request_info;
+  SSL_CTX *CTX;
+  int i, size;
+  const char *pem = ctx->config[SSL_CERTIFICATE];
+  const char *chain = ctx->config[SSL_CHAIN_FILE];
+
+  if (pem == NULL) {
+    return 1;
+  }
+
+#if !defined(NO_SSL_DL)
+  if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
+      !load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
+    return 0;
+  }
+#endif // NO_SSL_DL
+
+  // Initialize SSL crap
+  SSL_library_init();
+  SSL_load_error_strings();
+
+  if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) {
+    cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
+  } else if (ctx->user_callback != NULL) {
+    memset(&request_info, 0, sizeof(request_info));
+    request_info.user_data = ctx->user_data;
+    ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX,
+                       &request_info);
+  }
+
+  if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem,
+        SSL_FILETYPE_PEM) == 0) {
+    cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
+    return 0;
+  } else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem,
+        SSL_FILETYPE_PEM) == 0) {
+    cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error());
+    return 0;
+  }
+
+  if (CTX != NULL && chain != NULL &&
+      SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) {
+    cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error());
+    return 0;
+  }
+
+  // Initialize locking callbacks, needed for thread safety.
+  // http://www.openssl.org/support/faq.html#PROG1
+  size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
+  if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
+    cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
+    return 0;
+  }
+
+  for (i = 0; i < CRYPTO_num_locks(); i++) {
+    pthread_mutex_init(&ssl_mutexes[i], NULL);
+  }
+
+  CRYPTO_set_locking_callback(&ssl_locking_callback);
+  CRYPTO_set_id_callback(&ssl_id_callback);
+
+  // Done with everything. Save the context.
+  ctx->ssl_ctx = CTX;
+
+  return 1;
+}
+
+static void uninitialize_ssl(struct mg_context *ctx) {
+  int i;
+  if (ctx->ssl_ctx != NULL) {
+    CRYPTO_set_locking_callback(NULL);
+    for (i = 0; i < CRYPTO_num_locks(); i++) {
+      pthread_mutex_destroy(&ssl_mutexes[i]);
+    }
+    CRYPTO_set_locking_callback(NULL);
+    CRYPTO_set_id_callback(NULL);
+  }
+}
+#endif // !NO_SSL
+
+static int set_gpass_option(struct mg_context *ctx) {
+  struct mgstat mgstat;
+  const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
+  return path == NULL || mg_stat(path, &mgstat) == 0;
+}
+
+static int set_acl_option(struct mg_context *ctx) {
+  union usa fake;
+  return check_acl(ctx, &fake) != -1;
+}
+
+static void reset_per_request_attributes(struct mg_connection *conn) {
+  struct mg_request_info *ri = &conn->request_info;
+
+  // Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
+  ri->remote_user = ri->request_method = ri->uri = ri->http_version =
+    conn->path_info = NULL;
+  ri->num_headers = 0;
+  ri->status_code = -1;
+
+  conn->num_bytes_sent = conn->consumed_content = 0;
+  conn->content_len = -1;
+  conn->request_len = conn->data_len = 0;
+  conn->must_close = 0;
+}
+
+static void close_socket_gracefully(SOCKET sock) {
+  char buf[BUFSIZ];
+  struct linger linger;
+  int n;
+
+  // Set linger option to avoid socket hanging out after close. This prevent
+  // ephemeral port exhaust problem under high QPS.
+  linger.l_onoff = 1;
+  linger.l_linger = 1;
+  setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &linger, sizeof(linger));
+
+  // Send FIN to the client
+  (void) shutdown(sock, SHUT_WR);
+  set_non_blocking_mode(sock);
+
+  // Read and discard pending data. If we do not do that and close the
+  // socket, the data in the send buffer may be discarded. This
+  // behaviour is seen on Windows, when client keeps sending data
+  // when server decide to close the connection; then when client
+  // does recv() it gets no data back.
+  do {
+    n = pull(NULL, sock, NULL, buf, sizeof(buf));
+  } while (n > 0);
+
+  // Now we know that our FIN is ACK-ed, safe to close
+  (void) closesocket(sock);
+}
+
+static void close_connection(struct mg_connection *conn) {
+  if (conn->ssl) {
+    SSL_free(conn->ssl);
+    conn->ssl = NULL;
+  }
+
+  if (conn->client.sock != INVALID_SOCKET) {
+    close_socket_gracefully(conn->client.sock);
+  }
+}
+
+static void discard_current_request_from_buffer(struct mg_connection *conn) {
+  char *buffered;
+  int buffered_len, body_len;
+
+  buffered = conn->buf + conn->request_len;
+  buffered_len = conn->data_len - conn->request_len;
+  assert(buffered_len >= 0);
+
+  if (conn->content_len <= 0) {
+    // Protect from negative Content-Length, too
+    body_len = 0;
+  } else if (conn->content_len < (int64_t) buffered_len) {
+    body_len = (int) conn->content_len;
+  } else {
+    body_len = buffered_len;
+  }
+
+  conn->data_len -= conn->request_len + body_len;
+  memmove(conn->buf, conn->buf + conn->request_len + body_len,
+          (size_t) conn->data_len);
+}
+
+static int is_valid_uri(const char *uri) {
+  // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
+  // URI can be an asterisk (*) or should start with slash.
+  return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
+}
+
+static void process_new_connection(struct mg_connection *conn) {
+  struct mg_request_info *ri = &conn->request_info;
+  int keep_alive_enabled;
+  const char *cl;
+
+  keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
+
+  do {
+    reset_per_request_attributes(conn);
+    conn->request_len = read_request(NULL, conn->client.sock, conn->ssl,
+                                     conn->buf, conn->buf_size,
+                                     &conn->data_len);
+    assert(conn->data_len >= conn->request_len);
+    if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
+      send_http_error(conn, 413, "Request Too Large", "");
+      return;
+    } if (conn->request_len <= 0) {
+      return;  // Remote end closed the connection
+    }
+
+    // Nul-terminate the request cause parse_http_request() uses sscanf
+    conn->buf[conn->request_len - 1] = '\0';
+    if (!parse_http_request(conn->buf, ri) || !is_valid_uri(ri->uri)) {
+      // Do not put garbage in the access log, just send it back to the client
+      send_http_error(conn, 400, "Bad Request",
+          "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
+    } else if (strcmp(ri->http_version, "1.0") &&
+               strcmp(ri->http_version, "1.1")) {
+      // Request seems valid, but HTTP version is strange
+      send_http_error(conn, 505, "HTTP version not supported", "");
+      log_access(conn);
+    } else {
+      // Request is valid, handle it
+      cl = get_header(ri, "Content-Length");
+      conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
+      conn->birth_time = time(NULL);
+      handle_request(conn);
+      call_user(conn, MG_REQUEST_COMPLETE);
+      log_access(conn);
+      discard_current_request_from_buffer(conn);
+    }
+    if (ri->remote_user != NULL) {
+      free((void *) ri->remote_user);
+    }
+  } while (conn->ctx->stop_flag == 0 &&
+           keep_alive_enabled &&
+           should_keep_alive(conn));
+}
+
+// Worker threads take accepted socket from the queue
+static int consume_socket(struct mg_context *ctx, struct socket *sp) {
+  (void) pthread_mutex_lock(&ctx->mutex);
+  DEBUG_TRACE(("going idle"));
+
+  // If the queue is empty, wait. We're idle at this point.
+  while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
+    pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
+  }
+
+  // If we're stopping, sq_head may be equal to sq_tail.
+  if (ctx->sq_head > ctx->sq_tail) {
+    // Copy socket from the queue and increment tail
+    *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
+    ctx->sq_tail++;
+    DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
+
+    // Wrap pointers if needed
+    while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
+      ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
+      ctx->sq_head -= ARRAY_SIZE(ctx->queue);
+    }
+  }
+
+  (void) pthread_cond_signal(&ctx->sq_empty);
+  (void) pthread_mutex_unlock(&ctx->mutex);
+
+  return !ctx->stop_flag;
+}
+
+static void worker_thread(struct mg_context *ctx) {
+  struct mg_connection *conn;
+  int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]);
+
+  conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size);
+  if (conn == NULL) {
+    cry(fc(ctx), "%s", "Cannot create new connection struct, OOM");
+    return;
+  }
+  conn->buf_size = buf_size;
+  conn->buf = (char *) (conn + 1);
+
+  // Call consume_socket() even when ctx->stop_flag > 0, to let it signal
+  // sq_empty condvar to wake up the master waiting in produce_socket()
+  while (consume_socket(ctx, &conn->client)) {
+    conn->birth_time = time(NULL);
+    conn->ctx = ctx;
+
+    // Fill in IP, port info early so even if SSL setup below fails,
+    // error handler would have the corresponding info.
+    // Thanks to Johannes Winkelmann for the patch.
+    // TODO(lsm): Fix IPv6 case
+    conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port);
+    memcpy(&conn->request_info.remote_ip,
+           &conn->client.rsa.sin.sin_addr.s_addr, 4);
+    conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
+    conn->request_info.is_ssl = conn->client.is_ssl;
+
+    if (!conn->client.is_ssl ||
+        (conn->client.is_ssl && sslize(conn, SSL_accept))) {
+      process_new_connection(conn);
+    }
+
+    close_connection(conn);
+  }
+  free(conn);
+
+  // Signal master that we're done with connection and exiting
+  (void) pthread_mutex_lock(&ctx->mutex);
+  ctx->num_threads--;
+  (void) pthread_cond_signal(&ctx->cond);
+  assert(ctx->num_threads >= 0);
+  (void) pthread_mutex_unlock(&ctx->mutex);
+
+  DEBUG_TRACE(("exiting"));
+}
+
+// Master thread adds accepted socket to a queue
+static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
+  (void) pthread_mutex_lock(&ctx->mutex);
+
+  // If the queue is full, wait
+  while (ctx->stop_flag == 0 &&
+         ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
+    (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
+  }
+
+  if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) {
+    // Copy socket to the queue and increment head
+    ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
+    ctx->sq_head++;
+    DEBUG_TRACE(("queued socket %d", sp->sock));
+  }
+
+  (void) pthread_cond_signal(&ctx->sq_full);
+  (void) pthread_mutex_unlock(&ctx->mutex);
+}
+
+static void accept_new_connection(const struct socket *listener,
+                                  struct mg_context *ctx) {
+  struct socket accepted;
+  char src_addr[20];
+  socklen_t len;
+  int allowed;
+
+  len = sizeof(accepted.rsa);
+  accepted.lsa = listener->lsa;
+  accepted.sock = accept(listener->sock, &accepted.rsa.sa, &len);
+  if (accepted.sock != INVALID_SOCKET) {
+    allowed = check_acl(ctx, &accepted.rsa);
+    if (allowed) {
+      // Put accepted socket structure into the queue
+      DEBUG_TRACE(("accepted socket %d", accepted.sock));
+      accepted.is_ssl = listener->is_ssl;
+      produce_socket(ctx, &accepted);
+    } else {
+      sockaddr_to_string(src_addr, sizeof(src_addr), &accepted.rsa);
+      cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr);
+      (void) closesocket(accepted.sock);
+    }
+  }
+}
+
+static void master_thread(struct mg_context *ctx) {
+  fd_set read_set;
+  struct timeval tv;
+  struct socket *sp;
+  int max_fd;
+
+  // Increase priority of the master thread
+#if defined(_WIN32)
+  SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
+#endif
+  
+#if defined(ISSUE_317)
+  struct sched_param sched_param;
+  sched_param.sched_priority = sched_get_priority_max(SCHED_RR);
+  pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param);
+#endif
+
+  while (ctx->stop_flag == 0) {
+    FD_ZERO(&read_set);
+    max_fd = -1;
+
+    // Add listening sockets to the read set
+    for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
+      add_to_set(sp->sock, &read_set, &max_fd);
+    }
+
+    tv.tv_sec = 0;
+    tv.tv_usec = 200 * 1000;
+
+    if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
+#ifdef _WIN32
+      // On windows, if read_set and write_set are empty,
+      // select() returns "Invalid parameter" error
+      // (at least on my Windows XP Pro). So in this case, we sleep here.
+      mg_sleep(1000);
+#endif // _WIN32
+    } else {
+      for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
+        if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) {
+          accept_new_connection(sp, ctx);
+        }
+      }
+    }
+  }
+  DEBUG_TRACE(("stopping workers"));
+
+  // Stop signal received: somebody called mg_stop. Quit.
+  close_all_listening_sockets(ctx);
+
+  // Wakeup workers that are waiting for connections to handle.
+  pthread_cond_broadcast(&ctx->sq_full);
+
+  // Wait until all threads finish
+  (void) pthread_mutex_lock(&ctx->mutex);
+  while (ctx->num_threads > 0) {
+    (void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
+  }
+  (void) pthread_mutex_unlock(&ctx->mutex);
+
+  // All threads exited, no sync is needed. Destroy mutex and condvars
+  (void) pthread_mutex_destroy(&ctx->mutex);
+  (void) pthread_cond_destroy(&ctx->cond);
+  (void) pthread_cond_destroy(&ctx->sq_empty);
+  (void) pthread_cond_destroy(&ctx->sq_full);
+
+#if !defined(NO_SSL)
+  uninitialize_ssl(ctx);
+#endif
+
+  // Signal mg_stop() that we're done
+  ctx->stop_flag = 2;
+
+  DEBUG_TRACE(("exiting"));
+}
+
+static void free_context(struct mg_context *ctx) {
+  int i;
+
+  // Deallocate config parameters
+  for (i = 0; i < NUM_OPTIONS; i++) {
+    if (ctx->config[i] != NULL)
+      free(ctx->config[i]);
+  }
+
+  // Deallocate SSL context
+  if (ctx->ssl_ctx != NULL) {
+    SSL_CTX_free(ctx->ssl_ctx);
+  }
+#ifndef NO_SSL
+  if (ssl_mutexes != NULL) {
+    free(ssl_mutexes);
+  }
+#endif // !NO_SSL
+
+  // Deallocate context itself
+  free(ctx);
+}
+
+void mg_stop(struct mg_context *ctx) {
+  ctx->stop_flag = 1;
+
+  // Wait until mg_fini() stops
+  while (ctx->stop_flag != 2) {
+    mg_sleep(10);
+  }
+  free_context(ctx);
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+  (void) WSACleanup();
+#endif // _WIN32
+}
+
+struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
+                            const char **options) {
+  struct mg_context *ctx;
+  const char *name, *value, *default_value;
+  int i;
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+  WSADATA data;
+  WSAStartup(MAKEWORD(2,2), &data);
+  InitializeCriticalSection(&global_log_file_lock);
+#endif // _WIN32
+
+  // Allocate context and initialize reasonable general case defaults.
+  // TODO(lsm): do proper error handling here.
+  ctx = (struct mg_context *) calloc(1, sizeof(*ctx));
+  ctx->user_callback = user_callback;
+  ctx->user_data = user_data;
+
+  while (options && (name = *options++) != NULL) {
+    if ((i = get_option_index(name)) == -1) {
+      cry(fc(ctx), "Invalid option: %s", name);
+      free_context(ctx);
+      return NULL;
+    } else if ((value = *options++) == NULL) {
+      cry(fc(ctx), "%s: option value cannot be NULL", name);
+      free_context(ctx);
+      return NULL;
+    }
+    if (ctx->config[i] != NULL) {
+      cry(fc(ctx), "%s: duplicate option", name);
+    }
+    ctx->config[i] = mg_strdup(value);
+    DEBUG_TRACE(("[%s] -> [%s]", name, value));
+  }
+
+  // Set default value if needed
+  for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
+    default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
+    if (ctx->config[i] == NULL && default_value != NULL) {
+      ctx->config[i] = mg_strdup(default_value);
+      DEBUG_TRACE(("Setting default: [%s] -> [%s]",
+                   config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
+                   default_value));
+    }
+  }
+
+  // NOTE(lsm): order is important here. SSL certificates must
+  // be initialized before listening ports. UID must be set last.
+  if (!set_gpass_option(ctx) ||
+#if !defined(NO_SSL)
+      !set_ssl_option(ctx) ||
+#endif
+      !set_ports_option(ctx) ||
+#if !defined(_WIN32)
+      !set_uid_option(ctx) ||
+#endif
+      !set_acl_option(ctx)) {
+    free_context(ctx);
+    return NULL;
+  }
+
+#if !defined(_WIN32) && !defined(__SYMBIAN32__)
+  // Ignore SIGPIPE signal, so if browser cancels the request, it
+  // won't kill the whole process.
+  (void) signal(SIGPIPE, SIG_IGN);
+  // Also ignoring SIGCHLD to let the OS to reap zombies properly.
+  (void) signal(SIGCHLD, SIG_IGN);
+#endif // !_WIN32
+
+  (void) pthread_mutex_init(&ctx->mutex, NULL);
+  (void) pthread_cond_init(&ctx->cond, NULL);
+  (void) pthread_cond_init(&ctx->sq_empty, NULL);
+  (void) pthread_cond_init(&ctx->sq_full, NULL);
+
+  // Start master (listening) thread
+  start_thread(ctx, (mg_thread_func_t) master_thread, ctx);
+
+  // Start worker threads
+  for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
+    if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) {
+      cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);
+    } else {
+      ctx->num_threads++;
+    }
+  }
+
+  return ctx;
+}
Index: services/mghttpd/mongoose.h
===================================================================
--- services/mghttpd/mongoose.h	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
+++ services/mghttpd/mongoose.h	(revision 2cbf1af59dd3f15bbcfa554b903f1f473f2b3be8)
@@ -0,0 +1,238 @@
+// Copyright (c) 2004-2011 Sergey Lyubka
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef MONGOOSE_HEADER_INCLUDED
+#define  MONGOOSE_HEADER_INCLUDED
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+struct mg_context;     // Handle for the HTTP service itself
+struct mg_connection;  // Handle for the individual connection
+
+
+// This structure contains information about the HTTP request.
+struct mg_request_info {
+  void *user_data;       // User-defined pointer passed to mg_start()
+  char *request_method;  // "GET", "POST", etc
+  char *uri;             // URL-decoded URI
+  char *http_version;    // E.g. "1.0", "1.1"
+  char *query_string;    // URL part after '?' (not including '?') or NULL
+  char *remote_user;     // Authenticated user, or NULL if no auth used
+  char *log_message;     // Mongoose error log message, MG_EVENT_LOG only
+  long remote_ip;        // Client's IP address
+  int remote_port;       // Client's port
+  int status_code;       // HTTP reply status code, e.g. 200
+  int is_ssl;            // 1 if SSL-ed, 0 if not
+  int num_headers;       // Number of headers
+  struct mg_header {
+    char *name;          // HTTP header name
+    char *value;         // HTTP header value
+  } http_headers[64];    // Maximum 64 headers
+};
+
+// Various events on which user-defined function is called by Mongoose.
+enum mg_event {
+  MG_NEW_REQUEST,   // New HTTP request has arrived from the client
+  MG_HTTP_ERROR,    // HTTP error must be returned to the client
+  MG_EVENT_LOG,     // Mongoose logs an event, request_info.log_message
+  MG_INIT_SSL,      // Mongoose initializes SSL. Instead of mg_connection *,
+                    // SSL context is passed to the callback function.
+  MG_REQUEST_COMPLETE  // Mongoose has finished handling the request
+};
+
+// Prototype for the user-defined function. Mongoose calls this function
+// on every MG_* event.
+//
+// Parameters:
+//   event: which event has been triggered.
+//   conn: opaque connection handler. Could be used to read, write data to the
+//         client, etc. See functions below that have "mg_connection *" arg.
+//   request_info: Information about HTTP request.
+//
+// Return:
+//   If handler returns non-NULL, that means that handler has processed the
+//   request by sending appropriate HTTP reply to the client. Mongoose treats
+//   the request as served.
+//   If handler returns NULL, that means that handler has not processed
+//   the request. Handler must not send any data to the client in this case.
+//   Mongoose proceeds with request handling as if nothing happened.
+typedef void * (*mg_callback_t)(enum mg_event event,
+                                struct mg_connection *conn,
+                                const struct mg_request_info *request_info);
+
+
+// Start web server.
+//
+// Parameters:
+//   callback: user defined event handling function or NULL.
+//   options: NULL terminated list of option_name, option_value pairs that
+//            specify Mongoose configuration parameters.
+//
+// Side-effects: on UNIX, ignores SIGCHLD and SIGPIPE signals. If custom
+//    processing is required for these, signal handlers must be set up
+//    after calling mg_start().
+//
+//
+// Example:
+//   const char *options[] = {
+//     "document_root", "/var/www",
+//     "listening_ports", "80,443s",
+//     NULL
+//   };
+//   struct mg_context *ctx = mg_start(&my_func, NULL, options);
+//
+// Please refer to http://code.google.com/p/mongoose/wiki/MongooseManual
+// for the list of valid option and their possible values.
+//
+// Return:
+//   web server context, or NULL on error.
+struct mg_context *mg_start(mg_callback_t callback, void *user_data,
+                            const char **options);
+
+
+// Stop the web server.
+//
+// Must be called last, when an application wants to stop the web server and
+// release all associated resources. This function blocks until all Mongoose
+// threads are stopped. Context pointer becomes invalid.
+void mg_stop(struct mg_context *);
+
+
+// Get the value of particular configuration parameter.
+// The value returned is read-only. Mongoose does not allow changing
+// configuration at run time.
+// If given parameter name is not valid, NULL is returned. For valid
+// names, return value is guaranteed to be non-NULL. If parameter is not
+// set, zero-length string is returned.
+const char *mg_get_option(const struct mg_context *ctx, const char *name);
+
+
+// Return array of strings that represent valid configuration options.
+// For each option, a short name, long name, and default value is returned.
+// Array is NULL terminated.
+const char **mg_get_valid_option_names(void);
+
+
+// Add, edit or delete the entry in the passwords file.
+//
+// This function allows an application to manipulate .htpasswd files on the
+// fly by adding, deleting and changing user records. This is one of the
+// several ways of implementing authentication on the server side. For another,
+// cookie-based way please refer to the examples/chat.c in the source tree.
+//
+// If password is not NULL, entry is added (or modified if already exists).
+// If password is NULL, entry is deleted.
+//
+// Return:
+//   1 on success, 0 on error.
+int mg_modify_passwords_file(const char *passwords_file_name,
+                             const char *domain,
+                             const char *user,
+                             const char *password);
+
+// Send data to the client.
+int mg_write(struct mg_connection *, const void *buf, size_t len);
+
+
+// Send data to the browser using printf() semantics.
+//
+// Works exactly like mg_write(), but allows to do message formatting.  Note
+// that mg_printf() uses internal buffer of size BUFSIZ defined in <stdio.h>
+// (8 KiB on most Linux systems) as temporary message storage for formatting.
+// Do not print data that is bigger than that, otherwise it will be truncated.
+int mg_printf(struct mg_connection *, const char *fmt, ...)
+#ifdef __GNUC__
+__attribute__((format(printf, 2, 3)))
+#endif
+;
+
+
+// Send contents of the entire file together with HTTP headers.
+void mg_send_file(struct mg_connection *conn, const char *path);
+
+
+// Read data from the remote end, return number of bytes read.
+int mg_read(struct mg_connection *, void *buf, size_t len);
+
+
+// Get the value of particular HTTP header.
+//
+// This is a helper function. It traverses request_info->http_headers array,
+// and if the header is present in the array, returns its value. If it is
+// not present, NULL is returned.
+const char *mg_get_header(const struct mg_connection *, const char *name);
+
+
+// Get a value of particular form variable.
+//
+// Parameters:
+//   data: pointer to form-uri-encoded buffer. This could be either POST data,
+//         or request_info.query_string.
+//   data_len: length of the encoded data.
+//   var_name: variable name to decode from the buffer
+//   buf: destination buffer for the decoded variable
+//   buf_len: length of the destination buffer
+//
+// Return:
+//   On success, length of the decoded variable.
+//   On error, -1 (variable not found, or destination buffer is too small).
+//
+// Destination buffer is guaranteed to be '\0' - terminated. In case of
+// failure, dst[0] == '\0'.
+int mg_get_var(const char *data, size_t data_len,
+               const char *var_name, char *buf, size_t buf_len);
+
+// Fetch value of certain cookie variable into the destination buffer.
+//
+// Destination buffer is guaranteed to be '\0' - terminated. In case of
+// failure, dst[0] == '\0'. Note that RFC allows many occurrences of the same
+// parameter. This function returns only first occurrence.
+//
+// Return:
+//   On success, value length.
+//   On error, 0 (either "Cookie:" header is not present at all, or the
+//   requested parameter is not found, or destination buffer is too small
+//   to hold the value).
+int mg_get_cookie(const struct mg_connection *,
+                  const char *cookie_name, char *buf, size_t buf_len);
+
+
+// Return Mongoose version.
+const char *mg_version(void);
+
+
+// MD5 hash given strings.
+// Buffer 'buf' must be 33 bytes long. Varargs is a NULL terminated list of
+// asciiz strings. When function returns, buf will contain human-readable
+// MD5 hash. Example:
+//   char buf[33];
+//   mg_md5(buf, "aa", "bb", NULL);
+void mg_md5(char *buf, ...);
+
+
+#ifdef __cplusplus
+}
+#endif // __cplusplus
+
+#endif // MONGOOSE_HEADER_INCLUDED
