source: rtems/cpukit/httpd/webmain.c @ 70810dc

/*
 * main.c -- Main program for the GoAhead WebServer (RTEMS version)
 *
 * Copyright (c) Go Ahead Software Inc., 1995-1999. All Rights Reserved.
 *
 * See the file "license.txt" for usage and redistribution license requirements
 *
 *  $Id$
 */

/******************************** Description *********************************/

/*
 *      Main program for for the GoAhead WebServer. This is a demonstration
 *      main program to initialize and configure the web server.
 */

/********************************* Includes ***********************************/

#include        "uemf.h"
#include        "wsIntrn.h"
#include        <signal.h>
#include        <sys/time.h>
#include        <pthread.h>

#include        <rtems/error.h>

/*********************************** Locals ***********************************/
/*
 *      Change configuration here
 */

static char_t           *rootWeb = T("web");                    /* Root web directory */
static char_t           *password = T("");                              /* Security password */
static int                      port = 80;                                              /* Server port */
static int                      retries = 5;                                    /* Server port retries */
static int                      finished;                                               /* Finished flag */

/*
 *      Structure to hold timer events
 */
typedef struct {
        void    (*routine)(long arg);   /* Timer routine */
        long    arg;                                    /* Argument to routine */
} websTimer_t;

/* The following holds the pointer to an allocated websTimer_t structure .
 * Using this method only one timer can be active at a time, but
 * for the WebServer, this should be OK. 
 */
websTimer_t *tp;

/****************************** Forward Declarations **************************/

static int      initWebs();
static int      aspTest(int eid, webs_t wp, int argc, char_t **argv);
static void formTest(webs_t wp, char_t *path, char_t *query);
static int  websHomePageHandler(webs_t wp, char_t *urlPrefix, char_t *webDir,
                                int arg, char_t* url, char_t* path, char_t* query);
static void timerProc(int signo);
#if B_STATS
static void printMemStats(int handle, char_t *fmt, ...);
static void memLeaks();
#endif
static timer_t timer_id;
static void rtems_httpd_daemon();
 
/*********************************** Code *************************************/
/*
 *      Main -- entry point from RTEMS
 */
int rtems_initialize_webserver()
{
  rtems_status_code   sc;
  rtems_id            tid;
  int                 priority;

  /***********************************************************************
   * Default HTTPD priority.
   **********************************************************************/
  priority = 40;
  
  sc = rtems_task_create(rtems_build_name('H', 'T', 'P', 'D'),
                         priority, 8*1024,
                         RTEMS_PREEMPT | RTEMS_NO_TIMESLICE | RTEMS_NO_ASR |
                         RTEMS_INTERRUPT_LEVEL(0),
                         RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL,
                         &tid);
   if (sc != RTEMS_SUCCESSFUL)
   {
      return(RTEMS_UNSATISFIED);
   }

   sc = rtems_task_start(tid, rtems_httpd_daemon, 0);
   if (sc != RTEMS_SUCCESSFUL)
   {
      return(RTEMS_UNSATISFIED);
   }   

   return(RTEMS_SUCCESSFUL);

}

static void
rtems_httpd_daemon()
{
/*
 *      Initialize the memory allocator. Allow use of malloc and start with a 
 *      10K heap.
 */
        bopen(NULL, (10 * 1024), B_USE_MALLOC);

/*
 *      Initialize the web server
 */
        if (initWebs() < 0) {
          rtems_panic("Unable to initialize Web server !!\n");
        }

/*
 *      Basic event loop. SocketReady returns true when a socket is ready for
 *      service. SocketSelect will block until an event occurs. SocketProcess
 *      will actually do the servicing.
 */
        while (!finished) {
          if (socketReady() || socketSelect()) {
                        socketProcess();
          }
        }

/*
 *      Close the socket module, report memory leaks and close the memory allocator
 */
        websCloseServer();
        socketClose();
#if B_STATS
        memLeaks();
#endif
        bclose();
        rtems_task_delete( RTEMS_SELF );
}

/******************************************************************************/
/*
 *      Initialize the web server.
 */

static int initWebs()
{
        struct hostent* hp;
        struct in_addr  intaddr;
        char                    host[128], dir[128], webdir[128];
        char                    *cp;
        char_t                  wbuf[128];

/*
 *      Initialize the socket subsystem
 */
        socketOpen();

/*
 *      Define the local Ip address, host name, default home page and the 
 *      root web directory.
 */
        if (gethostname(host, sizeof(host)) < 0) {
                error(E_L, E_LOG, T("Can't get hostname"));
                return -1;
                }
        
/*      intaddr.s_addr = (unsigned long) hostGetByName(host); */
        if ((hp = gethostbyname(host)) == NULL) {
                error(E_L, E_LOG, T("Can't get host address"));
                return -1;
        }
        memcpy((char *) &intaddr, (char *) hp->h_addr_list[0],
                (size_t) hp->h_length);

/*
 *      Set ../web as the root web. Modify this to suit your needs
 */
        getcwd(dir, sizeof(dir)); 
        if ((cp = strrchr(dir, '/'))) {
                *cp = '\0';
        }
        sprintf(webdir, "%s/%s", dir, rootWeb);

/*
 *      Configure the web server options before opening the web server
 */
        websSetDefaultDir(webdir);
        ascToUni(wbuf, inet_ntoa(intaddr), sizeof(wbuf));
        websSetIpaddr(wbuf);
        ascToUni(wbuf, host, sizeof(wbuf));
        websSetHost(wbuf);

/*
 *      Configure the web server options before opening the web server
 */
        websSetDefaultPage(T("default.asp"));
        websSetPassword(password);

/* 
 *      Open the web server on the given port. If that port is taken, try
 *      the next sequential port for up to "retries" attempts.
 */
        websOpenServer(port, retries);

/*
 *      First create the URL handlers. Note: handlers are called in sorted order
 *      with the longest path handler examined first. Here we define the security 
 *      handler, forms handler and the default web page handler.
 */
        websUrlHandlerDefine(T(""), NULL, 0, websSecurityHandler, 
                WEBS_HANDLER_FIRST);
        websUrlHandlerDefine(T("/goform"), NULL, 0, websFormHandler, 0);
        websUrlHandlerDefine(T(""), NULL, 0, websDefaultHandler, 
                WEBS_HANDLER_LAST); 

/*
 *      Now define two test procedures. Replace these with your application
 *      relevant ASP script procedures and form functions.
 */
        websAspDefine(T("aspTest"), aspTest);
        websFormDefine(T("formTest"), formTest);

/*
 *      Create a handler for the default home page
 */
        websUrlHandlerDefine(T("/"), NULL, 0, websHomePageHandler, 0); 
        return 0;
}

/******************************************************************************/
/*
 *      Test Javascript binding for ASP. This will be invoked when "aspTest" is
 *      embedded in an ASP page. See web/asp.asp for usage. Set browser to 
 *      "localhost/asp.asp" to test.
 */

static int aspTest(int eid, webs_t wp, int argc, char_t **argv)
{
        char_t  *name, *address;

        if (ejArgs(argc, argv, T("%s %s"), &name, &address) < 2) {
                websError(wp, 400, T("Insufficient args\n"));
                return -1;
        }
        return websWrite(wp, T("Name: %s, Address %s"), name, address);
}
/******************************************************************************/
/*
 *      Test form for posted data (in-memory CGI). This will be called when the
 *      form in web/asp.asp is invoked. Set browser to "localhost/asp.asp" to test.
 */

static void formTest(webs_t wp, char_t *path, char_t *query)
{
        char_t  *name, *address;

        name = websGetVar(wp, T("name"), T("Joe Smith")); 
        address = websGetVar(wp, T("address"), T("1212 Milky Way Ave.")); 

        websHeader(wp);
        websWrite(wp, T("<body><h2>Name: %s, Address: %s</h2>\n"), name, address);
        websFooter(wp);
        websDone(wp, 200);
}

/******************************************************************************/
/*
 *      Create a timer to invoke the routine in "delay" milliseconds.
 */

void *emfCreateTimer(int delay, void (*routine)(long arg),      long arg)
{
/* this variable is only used in the if'ed 0 section below */
#if 0
        struct sigaction        act;
#endif
        struct itimerspec its = { {0,0}, {0,0} };
        struct sigevent se;
        int     status;

        if ((tp = balloc(B_L, sizeof(websTimer_t)))) {
                tp->routine = routine;
                tp->arg = arg;
        }
        else {
                return NULL;
        }

        se.sigev_notify = SIGEV_THREAD;
        se.sigev_value.sival_ptr = tp;
        se.sigev_notify_function = (void (*)(union sigval)) timerProc;

        /*
         * NOT POSIX?
         * se.sigev_notify_attributes = NULL;
         */


        status = timer_create(CLOCK_REALTIME, &se, &timer_id);
        if (status != 0) {
                bfree(B_L, tp);
                return NULL;
        }
        /* convert delay millisecs to secs and usecs required by struct */
        its.it_value.tv_sec = delay / 1000;
        its.it_value.tv_nsec = (delay % 1000) * 1000000;

        status = timer_settime(timer_id, 0, &its, 0);
        if (status != 0) {
                bfree(B_L, tp);
                return NULL;
        }
        
#if 0
        act.sa_flags = 0;
        sigemptyset(&act.sa_mask);
        act.sa_handler = timerProc;
        sigaction(SIGALRM, &act, NULL);

        /* convert delay millisecs to secs and usecs required by struct */
        its.it_value.tv_sec = delay / 1000;
        its.it_value.tv_usec = (delay % 1000) * 1000;

        if (setitimer(ITIMER_REAL, &its, NULL) ==  -1) {
                bfree(B_L, tp);
                return NULL;
        }
#endif
        return tp;
}

/******************************************************************************/
/*
 *      Delete a timer
 */

void emfDeleteTimer(void * id)
{
        websTimer_t *wtp;
        /*struct itimerval its = { {0,0}, {0,0} };*/

        wtp = (websTimer_t *)id;
        /*      setitimer(ITIMER_REAL, &its, NULL);*/
        timer_delete(timer_id);
        bfree(B_L, wtp);
}

/******************************************************************************/
/*
 *      Timer handler
 */

static void timerProc(int signo)
{
        websTimer_t wtp = *tp;

/* Copy the timer structure to a local first and delete it before calling
 * the function, since the function could create another timer.  In this 
 * implementation, only one timer can be allocated at a time.
 */

        bfree(B_L, tp);
        (wtp.routine)(wtp.arg);
}

/******************************************************************************/
/*
 *      Home page handler
 */

static int websHomePageHandler(webs_t wp, char_t *urlPrefix, char_t *webDir,
        int arg, char_t* url, char_t* path, char_t* query)
{
/*
 *      If the empty or "/" URL is invoked, redirect default URLs to the home page
 */
        if (*url == '\0' || gstrcmp(url, T("/")) == 0) {
                websRedirect(wp, T("home.asp"));
                return 1;
        }
        return 0;
}

/******************************************************************************/

#if B_STATS
static void memLeaks() 
{
        int             fd;

        if ((fd = gopen(T("leak.txt"), O_CREAT | O_TRUNC | O_WRONLY)) >= 0) {
                bstats(fd, printMemStats);
                close(fd);
        }
}

/******************************************************************************/
/*
 *      Print memory usage / leaks
 */

static void printMemStats(int handle, char_t *fmt, ...)
{
        va_list         args;
        char_t          buf[256];

        va_start(args, fmt);
        vsprintf(buf, fmt, args);
        va_end(args);
        write(handle, buf, strlen(buf));
}
#endif

/******************************************************************************/