1 | /* |
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2 | * webs.c -- GoAhead Embedded HTTP webs server |
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3 | * |
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4 | * Copyright (c) Go Ahead Software Inc., 1995-1999. All Rights Reserved. |
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5 | * |
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6 | * See the file "license.txt" for usage and redistribution license requirements |
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7 | */ |
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8 | |
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9 | /******************************** Description *********************************/ |
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10 | |
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11 | /* |
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12 | * This module implements an embedded HTTP/1.1 webs server. It supports |
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13 | * loadable URL handlers that define the nature of URL processing performed. |
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14 | */ |
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15 | |
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16 | /********************************* Includes ***********************************/ |
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17 | |
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18 | #include "wsIntrn.h" |
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19 | |
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20 | /******************************** Global Data *********************************/ |
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21 | |
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22 | websStatsType websStats; /* Web access stats */ |
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23 | webs_t *webs; /* Open connection list head */ |
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24 | sym_fd_t websMime; /* Set of mime types */ |
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25 | int websMax; /* List size */ |
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26 | int websPort; /* Listen port for server */ |
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27 | char_t websHost[64]; /* Host name for the server */ |
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28 | char_t websIpaddr[64]; /* IP address for the server */ |
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29 | char_t *websHostUrl = NULL; /* URL to access server */ |
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30 | |
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31 | /*********************************** Locals ***********************************/ |
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32 | /* |
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33 | * Standard HTTP error codes |
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34 | */ |
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35 | |
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36 | websErrorType websErrors[] = { |
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37 | { 200, T("Data follows") }, |
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38 | { 204, T("No Content") }, |
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39 | { 301, T("Redirect") }, |
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40 | { 302, T("Redirect") }, |
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41 | { 304, T("User local copy") }, |
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42 | { 400, T("Page not found") }, |
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43 | { 401, T("Password Required") }, |
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44 | { 404, T("Site or Page Not Found") }, |
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45 | { 405, T("Access Denied") }, |
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46 | { 500, T("Web Error") }, |
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47 | { 503, T("Site Temporarily Unavailable. Try again") }, |
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48 | { 0, NULL } |
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49 | }; |
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50 | |
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51 | #if WEBS_LOG_SUPPORT |
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52 | static char_t websLogname[64] = T("log.txt"); /* Log filename */ |
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53 | static int websLogFd; /* Log file handle */ |
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54 | #endif |
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55 | |
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56 | static int websListenSock; /* Listen socket */ |
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57 | |
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58 | /**************************** Forward Declarations ****************************/ |
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59 | |
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60 | static int websAccept(int sid, char *ipaddr, int port); |
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61 | static int websAlloc(int sid); |
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62 | static char_t *websErrorMsg(int code); |
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63 | static void websFree(webs_t wp); |
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64 | static void websFreeVar(sym_t* sp); |
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65 | static int websGetInput(webs_t wp, char_t **ptext, int *nbytes); |
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66 | static int websParseFirst(webs_t wp, char_t *text); |
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67 | static void websParseRequest(webs_t wp); |
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68 | static void websReadEvent(webs_t wp); |
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69 | static void websSocketEvent(int sid, int mask, int data); |
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70 | static void websTimeout(long wp); |
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71 | static void websTimeoutCancel(webs_t wp); |
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72 | static void websMarkTime(webs_t wp); |
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73 | static int websGetTimeSinceMark(webs_t wp); |
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74 | |
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75 | #if WEBS_LOG_SUPPORT |
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76 | static void websLog(webs_t wp, int code); |
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77 | #endif |
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78 | #if WEBS_IF_MODIFIED_SUPPORT |
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79 | static time_t dateParse(time_t tip, char_t *cmd); |
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80 | #endif |
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81 | |
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82 | /*********************************** Code *************************************/ |
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83 | /* |
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84 | * Open the GoAhead WebServer |
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85 | */ |
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86 | |
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87 | int websOpenServer(int port, int retries) |
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88 | { |
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89 | websMimeType *mt; |
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90 | |
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91 | a_assert(port > 0); |
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92 | a_assert(retries >= 0); |
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93 | |
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94 | #if WEBS_PAGE_ROM |
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95 | websRomOpen(); |
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96 | #endif |
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97 | |
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98 | /* |
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99 | * Create a mime type lookup table for quickly determining the content type |
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100 | */ |
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101 | websMime = symOpen(256); |
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102 | a_assert(websMime >= 0); |
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103 | for (mt = websMimeList; mt->type; mt++) { |
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104 | symEnter(websMime, mt->ext, valueString(mt->type, 0), 0); |
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105 | } |
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106 | |
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107 | /* |
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108 | * Open the URL handler module. The caller should create the required |
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109 | * URL handlers after calling this function. |
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110 | */ |
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111 | if (websUrlHandlerOpen() < 0) { |
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112 | return -1; |
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113 | } |
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114 | |
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115 | #if WEBS_LOG_SUPPORT |
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116 | /* |
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117 | * Optional request log support |
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118 | */ |
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119 | websLogFd = gopen(websLogname, O_CREAT | O_TRUNC | O_APPEND | O_WRONLY, |
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120 | 0666); |
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121 | a_assert(websLogFd >= 0); |
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122 | #endif |
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123 | |
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124 | return websOpenListen(port, retries); |
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125 | } |
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126 | |
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127 | /******************************************************************************/ |
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128 | /* |
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129 | * Close the GoAhead WebServer |
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130 | */ |
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131 | |
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132 | void websCloseServer() |
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133 | { |
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134 | webs_t wp; |
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135 | int wid; |
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136 | |
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137 | /* |
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138 | * Close the listen handle first then all open connections. |
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139 | */ |
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140 | websCloseListen(); |
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141 | |
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142 | /* |
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143 | * Close each open browser connection and free all resources |
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144 | */ |
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145 | for (wid = websMax; webs && wid >= 0; wid--) { |
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146 | if ((wp = webs[wid]) == NULL) { |
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147 | continue; |
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148 | } |
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149 | socketCloseConnection(wp->sid); |
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150 | websFree(wp); |
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151 | } |
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152 | |
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153 | #if WEBS_LOG_SUPPORT |
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154 | if (websLogFd >= 0) { |
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155 | close(websLogFd); |
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156 | websLogFd = -1; |
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157 | } |
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158 | #endif |
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159 | |
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160 | #if WEBS_PAGE_ROM |
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161 | websRomClose(); |
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162 | #endif |
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163 | symClose(websMime, NULL); |
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164 | websFormClose(); |
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165 | websUrlHandlerClose(); |
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166 | } |
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167 | |
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168 | /******************************************************************************/ |
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169 | /* |
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170 | * Open the GoAhead WebServer listen port |
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171 | */ |
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172 | |
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173 | int websOpenListen(int port, int retries) |
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174 | { |
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175 | int i, orig; |
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176 | |
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177 | a_assert(port > 0); |
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178 | a_assert(retries >= 0); |
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179 | |
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180 | orig = port; |
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181 | /* |
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182 | * Open the webs webs listen port. If we fail, try the next port. |
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183 | */ |
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184 | for (i = 0; i <= retries; i++) { |
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185 | websListenSock = socketOpenConnection(NULL, port, websAccept, 0); |
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186 | if (websListenSock >= 0) { |
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187 | break; |
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188 | } |
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189 | port++; |
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190 | } |
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191 | if (i > retries) { |
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192 | error(E_L, E_USER, T("Couldn't open a socket on ports %d - %d"), |
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193 | orig, port - 1); |
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194 | return -1; |
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195 | } |
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196 | trace(0, T("webs: Listening for HTTP requests on port %d\n"), port); |
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197 | |
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198 | /* |
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199 | * Determine the full URL address to access the home page for this web server |
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200 | */ |
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201 | websPort = port; |
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202 | bfreeSafe(B_L, websHostUrl); |
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203 | websHostUrl = NULL; |
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204 | if (port == 80) { |
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205 | websHostUrl = bstrdup(B_L, websHost); |
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206 | } else { |
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207 | gsnprintf(&websHostUrl, WEBS_MAX_URL + 80, T("%s:%d"), websHost, port); |
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208 | } |
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209 | return port; |
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210 | } |
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211 | |
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212 | /******************************************************************************/ |
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213 | /* |
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214 | * Close webs listen port |
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215 | */ |
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216 | |
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217 | void websCloseListen() |
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218 | { |
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219 | if (websListenSock >= 0) { |
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220 | socketCloseConnection(websListenSock); |
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221 | websListenSock = -1; |
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222 | } |
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223 | bfreeSafe(B_L, websHostUrl); |
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224 | websHostUrl = NULL; |
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225 | } |
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226 | |
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227 | /******************************************************************************/ |
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228 | /* |
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229 | * Accept a connection |
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230 | */ |
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231 | |
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232 | static int websAccept(int sid, char *ipaddr, int port) |
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233 | { |
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234 | webs_t wp; |
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235 | int wid; |
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236 | |
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237 | a_assert(ipaddr && *ipaddr); |
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238 | a_assert(sid >= 0); |
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239 | a_assert(port >= 0); |
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240 | |
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241 | /* |
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242 | * Allocate a new handle for this accepted connection. This will allocate |
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243 | * a webs_t structure in the webs[] list |
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244 | */ |
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245 | if ((wid = websAlloc(sid)) < 0) { |
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246 | return -1; |
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247 | } |
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248 | wp = webs[wid]; |
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249 | a_assert(wp); |
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250 | |
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251 | ascToUni(wp->ipaddr, ipaddr, sizeof(wp->ipaddr)); |
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252 | |
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253 | /* |
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254 | * Check if this is a request from a browser on this system. This is useful |
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255 | * to know for permitting administrative operations only for local access |
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256 | */ |
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257 | if (gstrcmp(wp->ipaddr, T("127.0.0.1")) == 0 || |
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258 | gstrcmp(wp->ipaddr, websIpaddr) == 0 || |
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259 | gstrcmp(wp->ipaddr, websHost) == 0) { |
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260 | wp->flags |= WEBS_LOCAL_REQUEST; |
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261 | } |
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262 | |
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263 | /* |
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264 | * Arrange for websSocketEvent to be called when read data is available |
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265 | */ |
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266 | socketCreateHandler(sid, SOCKET_READABLE , websSocketEvent, (int) wp); |
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267 | |
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268 | /* |
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269 | * Arrange for a timeout to kill hung requests |
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270 | */ |
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271 | wp->timeout = emfCreateTimer(WEBS_TIMEOUT, websTimeout, (long) wp); |
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272 | trace(5, T("webs: accept request\n")); |
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273 | return 0; |
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274 | } |
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275 | |
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276 | /******************************************************************************/ |
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277 | /* |
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278 | * The webs socket handler. Called in response to I/O. We just pass control |
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279 | * to the relevant read or write handler. A pointer to the webs structure |
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280 | * is passed as an (int) in iwp. |
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281 | */ |
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282 | |
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283 | static void websSocketEvent(int sid, int mask, int iwp) |
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284 | { |
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285 | webs_t wp; |
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286 | |
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287 | wp = (webs_t) iwp; |
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288 | a_assert(wp); |
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289 | |
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290 | if (! websValid(wp)) { |
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291 | return; |
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292 | } |
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293 | |
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294 | if (mask & SOCKET_READABLE) { |
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295 | websReadEvent(wp); |
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296 | } |
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297 | if (mask & SOCKET_WRITABLE) { |
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298 | if (wp->writeSocket) { |
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299 | (*wp->writeSocket)(wp); |
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300 | } |
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301 | } |
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302 | } |
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303 | |
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304 | /******************************************************************************/ |
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305 | /* |
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306 | * The webs read handler. This is the primary read event loop. It uses a |
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307 | * state machine to track progress while parsing the HTTP request. |
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308 | * Note: we never block as the socket is always in non-blocking mode. |
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309 | */ |
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310 | |
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311 | static void websReadEvent(webs_t wp) |
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312 | { |
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313 | char_t *text; |
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314 | int rc, nbytes, len, done; |
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315 | |
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316 | a_assert(wp); |
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317 | a_assert(websValid(wp)); |
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318 | |
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319 | websMarkTime(wp); |
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320 | |
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321 | /* |
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322 | * Read as many lines as possible. socketGets is called to read the header |
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323 | * and socketRead is called to read posted data. |
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324 | */ |
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325 | text = NULL; |
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326 | for (done = 0; !done; ) { |
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327 | if (text) { |
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328 | bfree(B_L, text); |
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329 | text = NULL; |
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330 | } |
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331 | |
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332 | /* |
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333 | * Get more input into "text". Returns 0, if more data is needed |
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334 | * to continue, -1 if finished with the request, or 1 if all |
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335 | * required data is available for current state. |
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336 | */ |
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337 | while ((rc = websGetInput(wp, &text, &nbytes)) == 0) { |
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338 | ; |
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339 | } |
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340 | |
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341 | /* |
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342 | * websGetInput returns -1 if it finishes with the request |
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343 | */ |
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344 | if (rc < 0) { |
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345 | break; |
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346 | } |
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347 | |
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348 | /* |
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349 | * This is the state machine for the web server. |
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350 | */ |
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351 | switch(wp->state) { |
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352 | case WEBS_BEGIN: |
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353 | /* |
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354 | * Parse the first line of the Http header |
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355 | */ |
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356 | if (websParseFirst(wp, text) < 0) { |
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357 | done++; |
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358 | break; |
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359 | } |
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360 | wp->state = WEBS_HEADER; |
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361 | break; |
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362 | |
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363 | case WEBS_HEADER: |
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364 | /* |
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365 | * Store more of the HTTP header. As we are doing line reads, we |
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366 | * need to separate the lines with '\n' |
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367 | */ |
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368 | if (ringqLen(&wp->header) > 0) { |
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369 | ringqPutstr(&wp->header, T("\n")); |
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370 | } |
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371 | ringqPutstr(&wp->header, text); |
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372 | break; |
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373 | |
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374 | case WEBS_POST_CLEN: |
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375 | /* |
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376 | * POST request with content specified by a content length |
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377 | */ |
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378 | if (wp->query) { |
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379 | if (wp->query[0] && !(wp->flags & WEBS_POST_DATA)) { |
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380 | /* |
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381 | * Special case where the POST request also had query data |
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382 | * specified in the URL, ie. url?query_data. In this case |
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383 | * the URL query data is separated by a '&' from the posted |
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384 | * query data. |
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385 | */ |
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386 | len = gstrlen(wp->query); |
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387 | wp->query = brealloc(B_L, wp->query, (len + gstrlen(text) + |
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388 | 2) * sizeof(char_t)); |
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389 | wp->query[len++] = '&'; |
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390 | gstrcpy(&wp->query[len], text); |
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391 | |
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392 | } else { |
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393 | /* |
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394 | * The existing query data came from the POST request so just |
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395 | * append it. |
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396 | */ |
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397 | len = gstrlen(wp->query); |
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398 | wp->query = brealloc(B_L, wp->query, (len + gstrlen(text) + |
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399 | 1) * sizeof(char_t)); |
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400 | if (wp->query) { |
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401 | gstrcpy(&wp->query[len], text); |
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402 | } |
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403 | } |
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404 | |
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405 | } else { |
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406 | wp->query = bstrdup(B_L, text); |
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407 | } |
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408 | /* |
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409 | * Calculate how much more post data is to be read. |
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410 | */ |
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411 | wp->flags |= WEBS_POST_DATA; |
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412 | wp->clen -= nbytes; |
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413 | if (wp->clen > 0) { |
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414 | if (nbytes > 0) { |
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415 | done++; |
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416 | break; |
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417 | } |
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418 | done++; |
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419 | break; |
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420 | } |
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421 | /* |
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422 | * No more data so process the request |
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423 | */ |
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424 | websUrlHandlerRequest(wp); |
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425 | done++; |
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426 | break; |
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427 | |
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428 | case WEBS_POST: |
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429 | /* |
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430 | * POST without content-length specification |
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431 | */ |
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432 | if (wp->query && *wp->query && !(wp->flags & WEBS_POST_DATA)) { |
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433 | len = gstrlen(wp->query); |
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434 | wp->query = brealloc(B_L, wp->query, (len + gstrlen(text) + |
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435 | 2) * sizeof(char_t)); |
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436 | if (wp->query) { |
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437 | wp->query[len++] = '&'; |
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438 | gstrcpy(&wp->query[len], text); |
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439 | } |
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440 | |
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441 | } else { |
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442 | wp->query = bstrdup(B_L, text); |
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443 | } |
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444 | wp->flags |= WEBS_POST_DATA; |
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445 | done++; |
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446 | break; |
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447 | |
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448 | default: |
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449 | websError(wp, 404, T("Bad state")); |
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450 | done++; |
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451 | break; |
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452 | } |
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453 | } |
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454 | if (text) { |
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455 | bfree(B_L, text); |
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456 | } |
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457 | } |
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458 | |
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459 | /******************************************************************************/ |
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460 | /* |
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461 | * Get input from the browser. Return TRUE (!0) if the request has been |
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462 | * handled. Return -1 on errors, 1 if input read, and 0 to instruct the |
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463 | * caller to call again for more input. |
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464 | * |
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465 | * Note: socketRead will Return the number of bytes read if successful. This |
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466 | * may be less than the requested "bufsize" and may be zero. It returns -1 for |
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467 | * errors. It returns 0 for EOF. Otherwise it returns the number of bytes |
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468 | * read. Since this may be zero, callers should use socketEof() to |
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469 | * distinguish between this and EOF. |
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470 | */ |
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471 | |
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472 | static int websGetInput(webs_t wp, char_t **ptext, int *pnbytes) |
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473 | { |
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474 | char_t *text; |
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475 | char buf[WEBS_SOCKET_BUFSIZ+1]; |
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476 | int nbytes, len, clen; |
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477 | |
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478 | a_assert(websValid(wp)); |
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479 | a_assert(ptext); |
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480 | a_assert(pnbytes); |
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481 | |
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482 | *ptext = text = NULL; |
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483 | *pnbytes = 0; |
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484 | |
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485 | /* |
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486 | * If this request is a POST with a content length, we know the number |
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487 | * of bytes to read so we use socketRead(). |
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488 | */ |
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489 | if (wp->state == WEBS_POST_CLEN) { |
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490 | len = (wp->clen > WEBS_SOCKET_BUFSIZ) ? WEBS_SOCKET_BUFSIZ : wp->clen; |
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491 | } else { |
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492 | len = 0; |
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493 | } |
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494 | |
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495 | if (len > 0) { |
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496 | nbytes = socketRead(wp->sid, buf, len); |
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497 | |
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498 | if (nbytes < 0) { /* Error */ |
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499 | websDone(wp, 0); |
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500 | return -1; |
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501 | |
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502 | } else if (nbytes == 0) { /* EOF or No data available */ |
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503 | return -1; |
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504 | |
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505 | } else { /* Valid data */ |
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506 | /* |
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507 | * Convert to UNICODE if necessary. First be sure the string |
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508 | * is NULL terminated. |
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509 | */ |
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510 | buf[nbytes] = '\0'; |
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511 | if ((text = ballocAscToUni(buf)) == NULL) { |
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512 | websError(wp, 503, T("Insufficient memory")); |
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513 | return -1; |
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514 | } |
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515 | } |
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516 | |
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517 | } else { |
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518 | nbytes = socketGets(wp->sid, &text); |
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519 | |
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520 | if (nbytes < 0) { |
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521 | /* |
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522 | * Error, EOF or incomplete |
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523 | */ |
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524 | if (socketEof(wp->sid)) { |
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525 | /* |
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526 | * If this is a post request without content length, process |
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527 | * the request as we now have all the data. Otherwise just |
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528 | * close the connection. |
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529 | */ |
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530 | if (wp->state == WEBS_POST) { |
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531 | websUrlHandlerRequest(wp); |
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532 | } else { |
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533 | websDone(wp, 0); |
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534 | } |
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535 | } |
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536 | /* |
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537 | * If state is WEBS_HEADER and the ringq is empty, then this is a |
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538 | * simple request with no additional header fields to process and |
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539 | * no empty line terminator. |
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540 | */ |
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541 | if (wp->state == WEBS_HEADER && ringqLen(&wp->header) <= 0) { |
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542 | websParseRequest(wp); |
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543 | websUrlHandlerRequest(wp); |
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544 | } |
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545 | return -1; |
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546 | |
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547 | } else if (nbytes == 0) { |
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548 | if (wp->state == WEBS_HEADER) { |
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549 | /* |
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550 | * Valid empty line, now finished with header |
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551 | */ |
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552 | websParseRequest(wp); |
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553 | if (wp->flags & WEBS_POST_REQUEST) { |
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554 | if (wp->flags & WEBS_CLEN) { |
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555 | wp->state = WEBS_POST_CLEN; |
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556 | clen = wp->clen; |
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557 | } else { |
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558 | wp->state = WEBS_POST; |
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559 | clen = 1; |
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560 | } |
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561 | if (clen > 0) { |
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562 | return 0; /* Get more data */ |
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563 | } |
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564 | return 1; |
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565 | |
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566 | } |
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567 | /* |
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568 | * We've read the header so go and handle the request |
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569 | */ |
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570 | websUrlHandlerRequest(wp); |
---|
571 | } |
---|
572 | return -1; |
---|
573 | |
---|
574 | } |
---|
575 | } |
---|
576 | a_assert(text); |
---|
577 | a_assert(nbytes > 0); |
---|
578 | *ptext = text; |
---|
579 | *pnbytes = nbytes; |
---|
580 | return 1; |
---|
581 | } |
---|
582 | |
---|
583 | /******************************************************************************/ |
---|
584 | /* |
---|
585 | * Parse the first line of a HTTP request |
---|
586 | */ |
---|
587 | |
---|
588 | static int websParseFirst(webs_t wp, char_t *text) |
---|
589 | { |
---|
590 | char_t *op, *proto, *url, *host, *query, *path, *port, *ext, *buf; |
---|
591 | |
---|
592 | a_assert(websValid(wp)); |
---|
593 | a_assert(text && *text); |
---|
594 | |
---|
595 | /* |
---|
596 | * Determine the request type: GET, HEAD or POST |
---|
597 | */ |
---|
598 | op = gstrtok(text, T(" \t")); |
---|
599 | if (op == NULL || *op == '\0') { |
---|
600 | websError(wp, 400, T("Bad HTTP request")); |
---|
601 | return -1; |
---|
602 | } |
---|
603 | if (gstrcmp(op, T("GET")) != 0) { |
---|
604 | if (gstrcmp(op, T("POST")) == 0) { |
---|
605 | wp->flags |= WEBS_POST_REQUEST; |
---|
606 | } else if (gstrcmp(op, T("HEAD")) == 0) { |
---|
607 | wp->flags |= WEBS_HEAD_REQUEST; |
---|
608 | } else { |
---|
609 | websError(wp, 400, T("Bad request type")); |
---|
610 | return -1; |
---|
611 | } |
---|
612 | } |
---|
613 | |
---|
614 | /* |
---|
615 | * Store result in the form (CGI) variable store |
---|
616 | */ |
---|
617 | websSetVar(wp, T("REQUEST_METHOD"), op); |
---|
618 | |
---|
619 | url = gstrtok(NULL, T(" \t\n")); |
---|
620 | if (url == NULL || *url == '\0') { |
---|
621 | websError(wp, 400, T("Bad HTTP request")); |
---|
622 | return -1; |
---|
623 | } |
---|
624 | |
---|
625 | /* |
---|
626 | * Parse the URL and store all the various URL components. websUrlParse |
---|
627 | * returns an allocated buffer in buf which we must free. We support both |
---|
628 | * proxied and non-proxied requests. Proxied requests will have http://host/ |
---|
629 | * at the start of the URL. Non-proxied will just be local path names. |
---|
630 | */ |
---|
631 | host = path = port = proto = query = ext = NULL; |
---|
632 | if (websUrlParse(url, &buf, &host, &path, &port, &query, &proto, |
---|
633 | NULL, &ext) < 0) { |
---|
634 | websError(wp, 400, T("Bad URL format")); |
---|
635 | return -1; |
---|
636 | } |
---|
637 | |
---|
638 | wp->url = bstrdup(B_L, url); |
---|
639 | wp->query = bstrdup(B_L, query); |
---|
640 | wp->host = bstrdup(B_L, host); |
---|
641 | wp->path = bstrdup(B_L, path); |
---|
642 | wp->port = gatoi(port); |
---|
643 | if (gstrcmp(ext, T(".asp")) == 0) { |
---|
644 | wp->flags |= WEBS_ASP; |
---|
645 | } |
---|
646 | bfree(B_L, buf); |
---|
647 | |
---|
648 | websUrlType(url, wp->type, TSZ(wp->type)); |
---|
649 | |
---|
650 | #if WEBS_PROXY_SUPPORT |
---|
651 | /* |
---|
652 | * Determine if this is a request for local webs data. If it is not a proxied |
---|
653 | * request from the browser, we won't see the "http://" or the system name, so |
---|
654 | * we assume it must be talking to us directly for local webs data. |
---|
655 | * Note: not fully implemented yet. |
---|
656 | */ |
---|
657 | if (gstrstr(wp->url, T("http://")) == NULL || |
---|
658 | ((gstrcmp(wp->host, T("localhost")) == 0 || |
---|
659 | gstrcmp(wp->host, websHost) == 0) && (wp->port == websPort))) { |
---|
660 | wp->flags |= WEBS_LOCAL_PAGE; |
---|
661 | if (gstrcmp(wp->path, T("/")) == 0) { |
---|
662 | wp->flags |= WEBS_HOME_PAGE; |
---|
663 | } |
---|
664 | } |
---|
665 | #endif |
---|
666 | |
---|
667 | ringqFlush(&wp->header); |
---|
668 | return 0; |
---|
669 | } |
---|
670 | |
---|
671 | /******************************************************************************/ |
---|
672 | /* |
---|
673 | * Parse a full request |
---|
674 | */ |
---|
675 | |
---|
676 | static void websParseRequest(webs_t wp) |
---|
677 | { |
---|
678 | char_t *upperKey, *cp, *browser, *lp, *key, *value; |
---|
679 | |
---|
680 | a_assert(websValid(wp)); |
---|
681 | |
---|
682 | /* |
---|
683 | * Define default CGI values |
---|
684 | */ |
---|
685 | websSetVar(wp, T("HTTP_AUTHORIZATION"), T("")); |
---|
686 | |
---|
687 | /* |
---|
688 | * Parse the header and create the Http header keyword variables |
---|
689 | * We rewrite the header as we go for non-local requests. NOTE: this |
---|
690 | * modifies the header string directly and tokenizes each line with '\0'. |
---|
691 | */ |
---|
692 | browser = NULL; |
---|
693 | for (lp = (char_t*) wp->header.servp; lp && *lp; ) { |
---|
694 | cp = lp; |
---|
695 | if ((lp = gstrchr(lp, '\n')) != NULL) { |
---|
696 | lp++; |
---|
697 | } |
---|
698 | |
---|
699 | if ((key = gstrtok(cp, T(": \t\n"))) == NULL) { |
---|
700 | continue; |
---|
701 | } |
---|
702 | |
---|
703 | if ((value = gstrtok(NULL, T("\n"))) == NULL) { |
---|
704 | value = T(""); |
---|
705 | } |
---|
706 | |
---|
707 | while (gisspace(*value)) { |
---|
708 | value++; |
---|
709 | } |
---|
710 | strlower(key); |
---|
711 | |
---|
712 | /* |
---|
713 | * Create a variable (CGI) for each line in the header |
---|
714 | */ |
---|
715 | gsnprintf(&upperKey, (gstrlen(key) + 6), T("HTTP_%s"), key); |
---|
716 | for (cp = upperKey; *cp; cp++) { |
---|
717 | if (*cp == '-') |
---|
718 | *cp = '_'; |
---|
719 | } |
---|
720 | strupper(upperKey); |
---|
721 | websSetVar(wp, upperKey, value); |
---|
722 | bfree(B_L, upperKey); |
---|
723 | |
---|
724 | /* |
---|
725 | * Track the requesting agent (browser) type |
---|
726 | */ |
---|
727 | if (gstrcmp(key, T("user-agent")) == 0) { |
---|
728 | wp->userAgent = bstrdup(B_L, value); |
---|
729 | |
---|
730 | /* |
---|
731 | * Parse the user authorization. ie. password |
---|
732 | */ |
---|
733 | } else if (gstrcmp(key, T("authorization")) == 0) { |
---|
734 | char_t password[FNAMESIZE]; |
---|
735 | |
---|
736 | /* |
---|
737 | * The incoming value is password:username |
---|
738 | */ |
---|
739 | if ((cp = gstrchr(value, ' ')) != NULL) { |
---|
740 | websDecode64(password, ++cp, sizeof(password)); |
---|
741 | } else { |
---|
742 | websDecode64(password, value, sizeof(password)); |
---|
743 | } |
---|
744 | if ((cp = gstrchr(password, ':')) != NULL) { |
---|
745 | *cp++ = '\0'; |
---|
746 | } |
---|
747 | if (cp) { |
---|
748 | wp->password = bstrdup(B_L, cp); |
---|
749 | } else { |
---|
750 | wp->password = bstrdup(B_L, T("")); |
---|
751 | } |
---|
752 | |
---|
753 | /* |
---|
754 | * Parse the content length |
---|
755 | */ |
---|
756 | } else if (gstrcmp(key, T("content-length")) == 0) { |
---|
757 | wp->flags |= WEBS_CLEN; |
---|
758 | wp->clen = gatoi(value); |
---|
759 | websSetVar(wp, T("CONTENT_LENGTH"), value); |
---|
760 | |
---|
761 | #if WEBS_KEEP_ALIVE_SUPPORT |
---|
762 | } else if (gstrcmp(key, T("connection")) == 0) { |
---|
763 | strlower(value); |
---|
764 | if (gstrcmp(value, T("keep-alive")) == 0) { |
---|
765 | wp->flags |= WEBS_KEEP_ALIVE; |
---|
766 | } |
---|
767 | #endif |
---|
768 | |
---|
769 | #if WEBS_PROXY_SUPPORT |
---|
770 | /* |
---|
771 | * This may be useful if you wish to keep a local cache of web pages |
---|
772 | * for proxied requests. |
---|
773 | */ |
---|
774 | } else if (gstrcmp(key, T("pragma")) == 0) { |
---|
775 | char_t tmp[256]; |
---|
776 | gstrncpy(tmp, value, TSZ(tmp)); |
---|
777 | strlower(tmp); |
---|
778 | if (gstrstr(tmp, T("no-cache"))) { |
---|
779 | wp->flags |= WEBS_DONT_USE_CACHE; |
---|
780 | } |
---|
781 | #endif |
---|
782 | |
---|
783 | /* |
---|
784 | * Store the cookie |
---|
785 | */ |
---|
786 | } else if (gstrcmp(key, T("cookie")) == 0) { |
---|
787 | wp->flags |= WEBS_COOKIE; |
---|
788 | wp->cookie = bstrdup(B_L, value); |
---|
789 | |
---|
790 | #if WEBS_IF_MODIFIED_SUPPORT |
---|
791 | /* |
---|
792 | * See if the local page has been modified since the browser last |
---|
793 | * requested this document. If not, just return a 302 |
---|
794 | */ |
---|
795 | } else if (gstrcmp(key, T("if-modified-since")) == 0) { |
---|
796 | char_t *cmd; |
---|
797 | time_t tip = 0; |
---|
798 | |
---|
799 | if (cp = gstrchr(value, ';')) { |
---|
800 | *cp = '\0'; |
---|
801 | } |
---|
802 | |
---|
803 | if (cp = gstrstr(value, T(", "))) { |
---|
804 | cp += 2; |
---|
805 | } |
---|
806 | |
---|
807 | if (gstrstr(cp, T("GMT"))) { |
---|
808 | gsnprintf(&cmd, 64, T("clock scan %s -gmt 1"), cp); |
---|
809 | } else { |
---|
810 | gsnprintf(&cmd, 64, T("clock scan %s"), cp); |
---|
811 | } |
---|
812 | if (wp->since = dateParse(tip, cmd)) { |
---|
813 | wp->flags |= WEBS_IF_MODIFIED; |
---|
814 | } |
---|
815 | bfreeSafe(B_L, cmd); |
---|
816 | #endif |
---|
817 | } |
---|
818 | } |
---|
819 | } |
---|
820 | |
---|
821 | |
---|
822 | #if WEBS_IF_MODIFIED_SUPPORT |
---|
823 | /******************************************************************************/ |
---|
824 | /* |
---|
825 | * Parse the date and time string. |
---|
826 | */ |
---|
827 | |
---|
828 | static time_t dateParse(time_t tip, char_t *cmd) |
---|
829 | { |
---|
830 | return (time_t)0; |
---|
831 | } |
---|
832 | #endif |
---|
833 | |
---|
834 | |
---|
835 | /******************************************************************************/ |
---|
836 | /* |
---|
837 | * Set the variable (CGI) environment for this request. Create variables |
---|
838 | * for all standard CGI variables. Also decode the query string and create |
---|
839 | * a variable for each name=value pair. |
---|
840 | */ |
---|
841 | |
---|
842 | void websSetEnv(webs_t wp) |
---|
843 | { |
---|
844 | char_t portBuf[8]; |
---|
845 | char_t *keyword, *value; |
---|
846 | |
---|
847 | a_assert(websValid(wp)); |
---|
848 | |
---|
849 | websSetVar(wp, T("QUERY_STRING"), wp->query); |
---|
850 | websSetVar(wp, T("GATEWAY_INTERFACE"), T("CGI/1.1")); |
---|
851 | websSetVar(wp, T("SERVER_HOST"), websHost); |
---|
852 | websSetVar(wp, T("SERVER_URL"), websHostUrl); |
---|
853 | websSetVar(wp, T("REMOTE_HOST"), wp->ipaddr); |
---|
854 | websSetVar(wp, T("REMOTE_ADDR"), wp->ipaddr); |
---|
855 | websSetVar(wp, T("PATH_INFO"), wp->path); |
---|
856 | stritoa(websPort, portBuf, sizeof(portBuf)); |
---|
857 | websSetVar(wp, T("SERVER_PORT"), portBuf); |
---|
858 | |
---|
859 | /* |
---|
860 | * Decode and create an environment query variable for each query keyword. |
---|
861 | * We split into pairs at each '&', then split pairs at the '='. |
---|
862 | * Note: we rely on wp->decodedQuery preserving the decoded values in the |
---|
863 | * symbol table. |
---|
864 | */ |
---|
865 | wp->decodedQuery = bstrdup(B_L, wp->query); |
---|
866 | keyword = gstrtok(wp->decodedQuery, T("&")); |
---|
867 | while (keyword != NULL) { |
---|
868 | if ((value = gstrchr(keyword, '=')) != NULL) { |
---|
869 | *value++ = '\0'; |
---|
870 | websDecodeUrl(keyword, keyword, gstrlen(keyword)); |
---|
871 | websDecodeUrl(value, value, gstrlen(value)); |
---|
872 | |
---|
873 | } else { |
---|
874 | value = T(""); |
---|
875 | } |
---|
876 | |
---|
877 | if (*keyword) { |
---|
878 | websSetVar(wp, keyword, value); |
---|
879 | } |
---|
880 | keyword = gstrtok(NULL, T("&")); |
---|
881 | } |
---|
882 | |
---|
883 | #if EMF |
---|
884 | /* |
---|
885 | * Add GoAhead Embedded Management Framework defines |
---|
886 | */ |
---|
887 | websSetEmfEnvironment(wp); |
---|
888 | #endif |
---|
889 | } |
---|
890 | |
---|
891 | /******************************************************************************/ |
---|
892 | /* |
---|
893 | * Define a webs (CGI) variable for this connection. Also create in relevant |
---|
894 | * scripting engines. Note: the incoming value may be volatile. |
---|
895 | */ |
---|
896 | |
---|
897 | void websSetVar(webs_t wp, char_t *var, char_t *value) |
---|
898 | { |
---|
899 | value_t v; |
---|
900 | |
---|
901 | a_assert(websValid(wp)); |
---|
902 | |
---|
903 | /* |
---|
904 | * value_instring will allocate the string if required. |
---|
905 | */ |
---|
906 | if (value) { |
---|
907 | v = valueString(value, VALUE_ALLOCATE); |
---|
908 | } else { |
---|
909 | v = valueString(T(""), VALUE_ALLOCATE); |
---|
910 | } |
---|
911 | symEnter(wp->cgiVars, var, v, 0); |
---|
912 | } |
---|
913 | |
---|
914 | /******************************************************************************/ |
---|
915 | /* |
---|
916 | * Return TRUE if a webs variable exists for this connection. |
---|
917 | */ |
---|
918 | |
---|
919 | int websTestVar(webs_t wp, char_t *var) |
---|
920 | { |
---|
921 | sym_t *sp; |
---|
922 | |
---|
923 | a_assert(websValid(wp)); |
---|
924 | |
---|
925 | if (var == NULL || *var == '\0') { |
---|
926 | return 0; |
---|
927 | } |
---|
928 | |
---|
929 | if ((sp = symLookup(wp->cgiVars, var)) == NULL) { |
---|
930 | return 0; |
---|
931 | } |
---|
932 | return 1; |
---|
933 | } |
---|
934 | |
---|
935 | /******************************************************************************/ |
---|
936 | /* |
---|
937 | * Get a webs variable but return a default value if string not found. |
---|
938 | * Note, defaultGetValue can be NULL to permit testing existance. |
---|
939 | */ |
---|
940 | |
---|
941 | char_t *websGetVar(webs_t wp, char_t *var, char_t *defaultGetValue) |
---|
942 | { |
---|
943 | sym_t *sp; |
---|
944 | |
---|
945 | a_assert(websValid(wp)); |
---|
946 | a_assert(var && *var); |
---|
947 | |
---|
948 | if ((sp = symLookup(wp->cgiVars, var)) != NULL) { |
---|
949 | a_assert(sp->content.type == string); |
---|
950 | if (sp->content.value.string) { |
---|
951 | return sp->content.value.string; |
---|
952 | } else { |
---|
953 | return T(""); |
---|
954 | } |
---|
955 | } |
---|
956 | return defaultGetValue; |
---|
957 | } |
---|
958 | |
---|
959 | /******************************************************************************/ |
---|
960 | /* |
---|
961 | * Cancel the request timeout. Note may be called multiple times. |
---|
962 | */ |
---|
963 | |
---|
964 | static void websTimeoutCancel(webs_t wp) |
---|
965 | { |
---|
966 | a_assert(websValid(wp)); |
---|
967 | |
---|
968 | if (wp->timeout) { |
---|
969 | emfDeleteTimer(wp->timeout); |
---|
970 | wp->timeout = NULL; |
---|
971 | } |
---|
972 | } |
---|
973 | |
---|
974 | /******************************************************************************/ |
---|
975 | /* |
---|
976 | * Output a HTTP response back to the browser. If redirect is set to a |
---|
977 | * URL, the browser will be sent to this location. |
---|
978 | */ |
---|
979 | |
---|
980 | void websResponse(webs_t wp, int code, char_t *message, char_t *redirect) |
---|
981 | { |
---|
982 | char_t *date; |
---|
983 | |
---|
984 | a_assert(websValid(wp)); |
---|
985 | |
---|
986 | /* |
---|
987 | * IE3.0 needs no Keep Alive for some return codes. |
---|
988 | */ |
---|
989 | wp->flags &= ~WEBS_KEEP_ALIVE; |
---|
990 | |
---|
991 | /* |
---|
992 | * Only output the header if a header has not already been output. |
---|
993 | */ |
---|
994 | if ( !(wp->flags & WEBS_HEADER_DONE)) { |
---|
995 | wp->flags |= WEBS_HEADER_DONE; |
---|
996 | websWrite(wp, T("HTTP/1.0 %d %s\r\n"), code, websErrorMsg(code)); |
---|
997 | |
---|
998 | /* by license terms the following line of code must |
---|
999 | * not be modified. |
---|
1000 | */ |
---|
1001 | websWrite(wp, T("Server: GoAhead-Webs\r\n")); |
---|
1002 | |
---|
1003 | if (wp->flags & WEBS_KEEP_ALIVE) { |
---|
1004 | websWrite(wp, T("Connection: keep-alive\r\n")); |
---|
1005 | } |
---|
1006 | websWrite(wp, T("Pragma: no-cache\r\nCache-Control: no-cache\r\n")); |
---|
1007 | |
---|
1008 | if ((date = websGetDateString(NULL)) != NULL) { |
---|
1009 | websWrite(wp, T("Date: %s\r\n"), date); |
---|
1010 | bfree(B_L, date); |
---|
1011 | } |
---|
1012 | websWrite(wp, T("Content-Type: text/html\r\n")); |
---|
1013 | |
---|
1014 | /* |
---|
1015 | * We don't do a string length here as the message may be multi-line. |
---|
1016 | * Ie. <CR><LF> will count as only one and we will have a content-length |
---|
1017 | * that is too short. |
---|
1018 | * |
---|
1019 | * websWrite(wp, T("Content-Length: %s\r\n"), message); |
---|
1020 | */ |
---|
1021 | if (redirect) { |
---|
1022 | websWrite(wp, T("Location: %s\r\n"), redirect); |
---|
1023 | } |
---|
1024 | websWrite(wp, T("\r\n")); |
---|
1025 | } |
---|
1026 | |
---|
1027 | if (message && *message) { |
---|
1028 | websWrite(wp, T("%s\r\n"), message); |
---|
1029 | } |
---|
1030 | websDone(wp, code); |
---|
1031 | } |
---|
1032 | |
---|
1033 | /******************************************************************************/ |
---|
1034 | /* |
---|
1035 | * Redirect the user to another webs page |
---|
1036 | */ |
---|
1037 | |
---|
1038 | void websRedirect(webs_t wp, char_t *url) |
---|
1039 | { |
---|
1040 | char_t *msgbuf, *urlbuf; |
---|
1041 | |
---|
1042 | a_assert(websValid(wp)); |
---|
1043 | a_assert(url); |
---|
1044 | |
---|
1045 | websStats.redirects++; |
---|
1046 | msgbuf = urlbuf = NULL; |
---|
1047 | |
---|
1048 | /* |
---|
1049 | * Some browsers require a http://host qualified URL for redirection |
---|
1050 | */ |
---|
1051 | if (gstrstr(url, T("http://")) == NULL) { |
---|
1052 | if (*url == '/') { |
---|
1053 | url++; |
---|
1054 | } |
---|
1055 | gsnprintf(&urlbuf, WEBS_MAX_URL + 80, T("http://%s/%s"), |
---|
1056 | websGetVar(wp, T("HTTP_HOST"), websHostUrl), url); |
---|
1057 | url = urlbuf; |
---|
1058 | } |
---|
1059 | |
---|
1060 | /* |
---|
1061 | * Add human readable message for completeness. Should not be required. |
---|
1062 | */ |
---|
1063 | gsnprintf(&msgbuf, WEBS_MAX_URL + 80, |
---|
1064 | T("<html><head></head><body>\r\n\ |
---|
1065 | This document has moved to a new <a href=\"%s\">location</a>.\r\n\ |
---|
1066 | Please update your documents to reflect the new location.\r\n\ |
---|
1067 | </body></html>\r\n"), url); |
---|
1068 | |
---|
1069 | websResponse(wp, 302, msgbuf, url); |
---|
1070 | |
---|
1071 | bfreeSafe(B_L, msgbuf); |
---|
1072 | bfreeSafe(B_L, urlbuf); |
---|
1073 | } |
---|
1074 | |
---|
1075 | /******************************************************************************/ |
---|
1076 | /* |
---|
1077 | * Output an error message and cleanup |
---|
1078 | */ |
---|
1079 | |
---|
1080 | void websError(webs_t wp, int code, char_t *fmt, ...) |
---|
1081 | { |
---|
1082 | va_list args; |
---|
1083 | char_t *msg, *userMsg, *buf; |
---|
1084 | |
---|
1085 | a_assert(websValid(wp)); |
---|
1086 | a_assert(fmt); |
---|
1087 | |
---|
1088 | websStats.errors++; |
---|
1089 | |
---|
1090 | va_start(args, fmt); |
---|
1091 | userMsg = NULL; |
---|
1092 | gvsnprintf(&userMsg, WEBS_BUFSIZE, fmt, args); |
---|
1093 | va_end(args); |
---|
1094 | |
---|
1095 | msg = T("<html><head><title>Document Error: %s</title></head>\r\n\ |
---|
1096 | <body><h2>Access Error: %s</h2>\r\n\ |
---|
1097 | when trying to obtain <b>%s</b><br><p>%s</p></body></html>\r\n"); |
---|
1098 | /* |
---|
1099 | * Ensure we have plenty of room |
---|
1100 | */ |
---|
1101 | buf = NULL; |
---|
1102 | gsnprintf(&buf, WEBS_BUFSIZE, msg, websErrorMsg(code), |
---|
1103 | websErrorMsg(code), wp->url, userMsg); |
---|
1104 | |
---|
1105 | websResponse(wp, code, buf, NULL); |
---|
1106 | bfreeSafe(B_L, buf); |
---|
1107 | bfreeSafe(B_L, userMsg); |
---|
1108 | } |
---|
1109 | |
---|
1110 | /******************************************************************************/ |
---|
1111 | /* |
---|
1112 | * Return the error message for a given code |
---|
1113 | */ |
---|
1114 | |
---|
1115 | static char_t *websErrorMsg(int code) |
---|
1116 | { |
---|
1117 | websErrorType* ep; |
---|
1118 | |
---|
1119 | for (ep = websErrors; ep->code; ep++) { |
---|
1120 | if (code == ep->code) { |
---|
1121 | return ep->msg; |
---|
1122 | } |
---|
1123 | } |
---|
1124 | a_assert(0); |
---|
1125 | return T(""); |
---|
1126 | } |
---|
1127 | |
---|
1128 | /******************************************************************************/ |
---|
1129 | /* |
---|
1130 | * Do formatted output to the browser. This is the public ASP and form |
---|
1131 | * write procedure. |
---|
1132 | */ |
---|
1133 | |
---|
1134 | int websWrite(webs_t wp, char_t* fmt, ...) |
---|
1135 | { |
---|
1136 | va_list vargs; |
---|
1137 | char_t *buf; |
---|
1138 | int rc; |
---|
1139 | |
---|
1140 | a_assert(websValid(wp)); |
---|
1141 | |
---|
1142 | va_start(vargs, fmt); |
---|
1143 | |
---|
1144 | buf = NULL; |
---|
1145 | rc = 0; |
---|
1146 | if (gvsnprintf(&buf, WEBS_BUFSIZE, fmt, vargs) >= WEBS_BUFSIZE) { |
---|
1147 | trace(0, T("webs: websWrite lost data, buffer overflow\n")); |
---|
1148 | } |
---|
1149 | va_end(vargs); |
---|
1150 | a_assert(buf); |
---|
1151 | if (buf) { |
---|
1152 | rc = websWriteBlock(wp, buf, gstrlen(buf)); |
---|
1153 | bfree(B_L, buf); |
---|
1154 | } |
---|
1155 | return rc; |
---|
1156 | } |
---|
1157 | |
---|
1158 | /******************************************************************************/ |
---|
1159 | /* |
---|
1160 | * Write a block of data of length "nChars" to the user's browser. Public |
---|
1161 | * write block procedure. If unicode is turned on this function expects |
---|
1162 | * buf to be a unicode string and it converts it to ASCII before writing. |
---|
1163 | * See websWriteBlockData to always write binary or ASCII data with no |
---|
1164 | * unicode conversion. This returns the number of char_t's processed. |
---|
1165 | */ |
---|
1166 | |
---|
1167 | int websWriteBlock(webs_t wp, char_t *buf, int nChars) |
---|
1168 | { |
---|
1169 | #if ! UNICODE |
---|
1170 | return websWriteBlockData(wp, buf, nChars); |
---|
1171 | #else |
---|
1172 | int r; |
---|
1173 | char *charBuf; |
---|
1174 | |
---|
1175 | a_assert(buf); |
---|
1176 | a_assert(nChars >= 0); |
---|
1177 | |
---|
1178 | if ((charBuf = ballocUniToAsc(buf, nChars)) == NULL) { |
---|
1179 | return -1; |
---|
1180 | } |
---|
1181 | r = websWriteBlockData(wp, charBuf, nChars); |
---|
1182 | bfree(B_L, charBuf); |
---|
1183 | return r; |
---|
1184 | #endif |
---|
1185 | } |
---|
1186 | |
---|
1187 | /******************************************************************************/ |
---|
1188 | /* |
---|
1189 | * Write a block of data of length "nChars" to the user's browser. Same as |
---|
1190 | * websWriteBlock except that it expects straight ASCII or binary and does no |
---|
1191 | * unicode conversion before writing the data. |
---|
1192 | * This returns the number of chars processed. |
---|
1193 | */ |
---|
1194 | |
---|
1195 | int websWriteBlockData(webs_t wp, char *buf, int nChars) |
---|
1196 | { |
---|
1197 | int len, done; |
---|
1198 | |
---|
1199 | a_assert(wp); |
---|
1200 | a_assert(websValid(wp)); |
---|
1201 | a_assert(buf); |
---|
1202 | a_assert(nChars >= 0); |
---|
1203 | |
---|
1204 | done = len = 0; |
---|
1205 | while (nChars > 0) { |
---|
1206 | if ((len = socketWrite(wp->sid, buf, nChars)) < 0) { |
---|
1207 | return -1; |
---|
1208 | } |
---|
1209 | /* |
---|
1210 | * Block in flush if the last write could not take any more data |
---|
1211 | */ |
---|
1212 | socketFlush(wp->sid, len == 0); |
---|
1213 | nChars -= len; |
---|
1214 | buf += len; |
---|
1215 | done += len; |
---|
1216 | } |
---|
1217 | return done; |
---|
1218 | } |
---|
1219 | |
---|
1220 | /******************************************************************************/ |
---|
1221 | /* |
---|
1222 | * Decode a URL (or part thereof). Allows insitu decoding. |
---|
1223 | */ |
---|
1224 | |
---|
1225 | void websDecodeUrl(char_t *decoded, char_t *token, int len) |
---|
1226 | { |
---|
1227 | char_t *ip, *op; |
---|
1228 | int num, i, c; |
---|
1229 | |
---|
1230 | a_assert(decoded); |
---|
1231 | a_assert(token); |
---|
1232 | num = 0; |
---|
1233 | |
---|
1234 | op = decoded; |
---|
1235 | for (ip = token; *ip && len > 0; ip++, op++) { |
---|
1236 | if (*ip == '+') { |
---|
1237 | *op = ' '; |
---|
1238 | } else if (*ip == '%' && gisxdigit(ip[1]) && gisxdigit(ip[2])) { |
---|
1239 | |
---|
1240 | /* |
---|
1241 | * Convert %nn to a single character |
---|
1242 | */ |
---|
1243 | ip++; |
---|
1244 | for (i = 0; i < 2; i++, ip++) { |
---|
1245 | c = tolower(*ip); |
---|
1246 | if (c >= 'a' && c <= 'f') { |
---|
1247 | num = (num * 16) + 10 + c - 'a'; |
---|
1248 | } else { |
---|
1249 | num = (num * 16) + c - '0'; |
---|
1250 | } |
---|
1251 | } |
---|
1252 | *op = (char_t) num; |
---|
1253 | ip--; |
---|
1254 | |
---|
1255 | } else { |
---|
1256 | *op = *ip; |
---|
1257 | } |
---|
1258 | len--; |
---|
1259 | } |
---|
1260 | *op = '\0'; |
---|
1261 | } |
---|
1262 | |
---|
1263 | /******************************************************************************/ |
---|
1264 | #if WEBS_LOG_SUPPORT |
---|
1265 | /* |
---|
1266 | * Output a log message |
---|
1267 | */ |
---|
1268 | |
---|
1269 | static void websLog(webs_t wp, int code) |
---|
1270 | { |
---|
1271 | char_t *buf; |
---|
1272 | char *abuf; |
---|
1273 | int len; |
---|
1274 | |
---|
1275 | a_assert(websValid(wp)); |
---|
1276 | |
---|
1277 | buf = NULL; |
---|
1278 | gsnprintf(&buf, WEBS_MAX_URL + 80, T("%d %s %d %d\n"), time(0), |
---|
1279 | wp->url, code, wp->written); |
---|
1280 | len = gstrlen(buf); |
---|
1281 | abuf = ballocUniToAsc(buf, len+1); |
---|
1282 | write(websLogFd, abuf, len); |
---|
1283 | bfreeSafe(B_L, buf); |
---|
1284 | bfreeSafe(B_L, abuf); |
---|
1285 | } |
---|
1286 | |
---|
1287 | #endif /* WEBS_LOG_SUPPORT */ |
---|
1288 | |
---|
1289 | /******************************************************************************/ |
---|
1290 | /* |
---|
1291 | * Request timeout. The timeout triggers if we have not read any data from |
---|
1292 | * the users browser in the last WEBS_TIMEOUT period. If we have heard from |
---|
1293 | * the browser, simply re-issue the timeout. |
---|
1294 | */ |
---|
1295 | |
---|
1296 | static void websTimeout(long iwp) |
---|
1297 | { |
---|
1298 | webs_t wp; |
---|
1299 | int delay, tm; |
---|
1300 | |
---|
1301 | wp = (webs_t) iwp; |
---|
1302 | a_assert(websValid(wp)); |
---|
1303 | |
---|
1304 | tm = websGetTimeSinceMark(wp) * 1000; |
---|
1305 | if (tm >= WEBS_TIMEOUT) { |
---|
1306 | websStats.timeouts++; |
---|
1307 | wp->timeout = NULL; |
---|
1308 | websDone(wp, 404); |
---|
1309 | |
---|
1310 | } else { |
---|
1311 | delay = WEBS_TIMEOUT - tm; |
---|
1312 | a_assert(delay > 0); |
---|
1313 | wp->timeout = emfCreateTimer(delay, websTimeout, (long) wp); |
---|
1314 | } |
---|
1315 | } |
---|
1316 | |
---|
1317 | /******************************************************************************/ |
---|
1318 | /* |
---|
1319 | * Called when the request is done. |
---|
1320 | */ |
---|
1321 | |
---|
1322 | void websDone(webs_t wp, int code) |
---|
1323 | { |
---|
1324 | a_assert(websValid(wp)); |
---|
1325 | |
---|
1326 | /* |
---|
1327 | * Disable socket handler in case keep alive set. |
---|
1328 | */ |
---|
1329 | socketDeleteHandler(wp->sid); |
---|
1330 | |
---|
1331 | if (code != 200) { |
---|
1332 | wp->flags &= ~WEBS_KEEP_ALIVE; |
---|
1333 | } |
---|
1334 | |
---|
1335 | #if WEBS_PROXY_SUPPORT |
---|
1336 | if (! (wp->flags & WEBS_LOCAL_PAGE)) { |
---|
1337 | websStats.activeNetRequests--; |
---|
1338 | } |
---|
1339 | #endif |
---|
1340 | |
---|
1341 | #if WEBS_LOG_SUPPORT |
---|
1342 | if (! (wp->flags & WEBS_REQUEST_DONE)) { |
---|
1343 | websLog(wp, code); |
---|
1344 | } |
---|
1345 | #endif |
---|
1346 | |
---|
1347 | /* |
---|
1348 | * Close any opened document by a handler |
---|
1349 | */ |
---|
1350 | websPageClose(wp); |
---|
1351 | |
---|
1352 | /* |
---|
1353 | * If using Keep Alive (HTTP/1.1) we keep the socket open for a period |
---|
1354 | * while waiting for another request on the socket. |
---|
1355 | */ |
---|
1356 | if (wp->flags & WEBS_KEEP_ALIVE) { |
---|
1357 | if (socketFlush(wp->sid, 0) == 0) { |
---|
1358 | wp->state = WEBS_BEGIN; |
---|
1359 | wp->flags |= WEBS_REQUEST_DONE; |
---|
1360 | if (wp->header.buf) { |
---|
1361 | ringqFlush(&wp->header); |
---|
1362 | } |
---|
1363 | socketCreateHandler(wp->sid, SOCKET_READABLE, websSocketEvent, |
---|
1364 | (int) wp); |
---|
1365 | websTimeoutCancel(wp); |
---|
1366 | wp->timeout = emfCreateTimer(WEBS_TIMEOUT, websTimeout, (long) wp); |
---|
1367 | return; |
---|
1368 | } |
---|
1369 | } else { |
---|
1370 | websTimeoutCancel(wp); |
---|
1371 | socketCloseConnection(wp->sid); |
---|
1372 | } |
---|
1373 | websFree(wp); |
---|
1374 | } |
---|
1375 | |
---|
1376 | /******************************************************************************/ |
---|
1377 | /* |
---|
1378 | * Allocate a new webs structure |
---|
1379 | */ |
---|
1380 | |
---|
1381 | static int websAlloc(int sid) |
---|
1382 | { |
---|
1383 | webs_t wp; |
---|
1384 | int wid; |
---|
1385 | |
---|
1386 | /* |
---|
1387 | * Allocate a new handle for this connection |
---|
1388 | */ |
---|
1389 | if ((wid = hAllocEntry((void***) &webs, &websMax, |
---|
1390 | sizeof(struct websRec))) < 0) { |
---|
1391 | return -1; |
---|
1392 | } |
---|
1393 | wp = webs[wid]; |
---|
1394 | |
---|
1395 | wp->wid = wid; |
---|
1396 | wp->sid = sid; |
---|
1397 | wp->state = WEBS_BEGIN; |
---|
1398 | wp->docfd = -1; |
---|
1399 | wp->dir = NULL; |
---|
1400 | |
---|
1401 | ringqOpen(&wp->header, WEBS_HEADER_BUFINC, WEBS_MAX_HEADER); |
---|
1402 | |
---|
1403 | /* |
---|
1404 | * Create storage for the CGI variables. We supply the symbol tables for |
---|
1405 | * both the CGI variables and for the global functions. The function table |
---|
1406 | * is common to all webs instances (ie. all browsers) |
---|
1407 | */ |
---|
1408 | wp->cgiVars = symOpen(64); |
---|
1409 | |
---|
1410 | return wid; |
---|
1411 | } |
---|
1412 | |
---|
1413 | /******************************************************************************/ |
---|
1414 | /* |
---|
1415 | * Free a webs structure |
---|
1416 | */ |
---|
1417 | |
---|
1418 | static void websFree(webs_t wp) |
---|
1419 | { |
---|
1420 | a_assert(websValid(wp)); |
---|
1421 | |
---|
1422 | if (wp->path) |
---|
1423 | bfree(B_L, wp->path); |
---|
1424 | if (wp->url) |
---|
1425 | bfree(B_L, wp->url); |
---|
1426 | if (wp->host) |
---|
1427 | bfree(B_L, wp->host); |
---|
1428 | if (wp->lpath) |
---|
1429 | bfree(B_L, wp->lpath); |
---|
1430 | if (wp->query) |
---|
1431 | bfree(B_L, wp->query); |
---|
1432 | if (wp->decodedQuery) |
---|
1433 | bfree(B_L, wp->decodedQuery); |
---|
1434 | if (wp->password) |
---|
1435 | bfree(B_L, wp->password); |
---|
1436 | if (wp->userName) |
---|
1437 | bfree(B_L, wp->userName); |
---|
1438 | if (wp->cookie) |
---|
1439 | bfree(B_L, wp->cookie); |
---|
1440 | if (wp->userAgent) |
---|
1441 | bfree(B_L, wp->userAgent); |
---|
1442 | if (wp->dir) |
---|
1443 | bfree(B_L, wp->dir); |
---|
1444 | |
---|
1445 | symClose(wp->cgiVars, websFreeVar); |
---|
1446 | |
---|
1447 | if (wp->header.buf) { |
---|
1448 | ringqClose(&wp->header); |
---|
1449 | } |
---|
1450 | |
---|
1451 | websMax = hFree((void***) &webs, wp->wid); |
---|
1452 | bfree(B_L, wp); |
---|
1453 | a_assert(websMax >= 0); |
---|
1454 | } |
---|
1455 | |
---|
1456 | /******************************************************************************/ |
---|
1457 | /* |
---|
1458 | * Callback from symClose. Free the variable. |
---|
1459 | */ |
---|
1460 | |
---|
1461 | static void websFreeVar(sym_t* sp) |
---|
1462 | { |
---|
1463 | valueFree(&sp->content); |
---|
1464 | } |
---|
1465 | |
---|
1466 | /******************************************************************************/ |
---|
1467 | /* |
---|
1468 | * Return the server address |
---|
1469 | */ |
---|
1470 | |
---|
1471 | char_t* websGetHost() |
---|
1472 | { |
---|
1473 | return websHost; |
---|
1474 | } |
---|
1475 | |
---|
1476 | /******************************************************************************/ |
---|
1477 | /* |
---|
1478 | * Return the server address |
---|
1479 | */ |
---|
1480 | |
---|
1481 | char_t* websGetHostUrl() |
---|
1482 | { |
---|
1483 | return websHostUrl; |
---|
1484 | } |
---|
1485 | |
---|
1486 | /******************************************************************************/ |
---|
1487 | /* |
---|
1488 | * Return the listen port |
---|
1489 | */ |
---|
1490 | |
---|
1491 | int websGetPort() |
---|
1492 | { |
---|
1493 | return websPort; |
---|
1494 | } |
---|
1495 | |
---|
1496 | /******************************************************************************/ |
---|
1497 | /* |
---|
1498 | * Get the number of bytes to write |
---|
1499 | */ |
---|
1500 | |
---|
1501 | int websGetRequestBytes(webs_t wp) |
---|
1502 | { |
---|
1503 | a_assert(websValid(wp)); |
---|
1504 | |
---|
1505 | return wp->numbytes; |
---|
1506 | } |
---|
1507 | |
---|
1508 | /******************************************************************************/ |
---|
1509 | /* |
---|
1510 | * Get the directory for this request |
---|
1511 | */ |
---|
1512 | |
---|
1513 | char_t *websGetRequestDir(webs_t wp) |
---|
1514 | { |
---|
1515 | a_assert(websValid(wp)); |
---|
1516 | |
---|
1517 | if (wp->dir == NULL) { |
---|
1518 | return T(""); |
---|
1519 | } |
---|
1520 | |
---|
1521 | return wp->dir; |
---|
1522 | } |
---|
1523 | |
---|
1524 | /******************************************************************************/ |
---|
1525 | /* |
---|
1526 | * Get the flags for this request |
---|
1527 | */ |
---|
1528 | |
---|
1529 | int websGetRequestFlags(webs_t wp) |
---|
1530 | { |
---|
1531 | a_assert(websValid(wp)); |
---|
1532 | |
---|
1533 | return wp->flags; |
---|
1534 | } |
---|
1535 | |
---|
1536 | /******************************************************************************/ |
---|
1537 | /* |
---|
1538 | * Return the IP address |
---|
1539 | */ |
---|
1540 | |
---|
1541 | char_t *websGetRequestIpaddr(webs_t wp) |
---|
1542 | { |
---|
1543 | a_assert(websValid(wp)); |
---|
1544 | |
---|
1545 | return wp->ipaddr; |
---|
1546 | } |
---|
1547 | |
---|
1548 | /******************************************************************************/ |
---|
1549 | /* |
---|
1550 | * Set the local path for the request |
---|
1551 | */ |
---|
1552 | |
---|
1553 | char_t *websGetRequestLpath(webs_t wp) |
---|
1554 | { |
---|
1555 | a_assert(websValid(wp)); |
---|
1556 | |
---|
1557 | #if WEBS_PAGE_ROM |
---|
1558 | return wp->path; |
---|
1559 | #else |
---|
1560 | return wp->lpath; |
---|
1561 | #endif |
---|
1562 | } |
---|
1563 | |
---|
1564 | /******************************************************************************/ |
---|
1565 | /* |
---|
1566 | * Get the path for this request |
---|
1567 | */ |
---|
1568 | |
---|
1569 | char_t *websGetRequestPath(webs_t wp) |
---|
1570 | { |
---|
1571 | a_assert(websValid(wp)); |
---|
1572 | |
---|
1573 | if (wp->path == NULL) { |
---|
1574 | return T(""); |
---|
1575 | } |
---|
1576 | |
---|
1577 | return wp->path; |
---|
1578 | } |
---|
1579 | |
---|
1580 | /******************************************************************************/ |
---|
1581 | /* |
---|
1582 | * Return the password |
---|
1583 | */ |
---|
1584 | |
---|
1585 | char_t* websGetRequestPassword(webs_t wp) |
---|
1586 | { |
---|
1587 | a_assert(websValid(wp)); |
---|
1588 | |
---|
1589 | return wp->password; |
---|
1590 | } |
---|
1591 | |
---|
1592 | /******************************************************************************/ |
---|
1593 | /* |
---|
1594 | * Return the request type |
---|
1595 | */ |
---|
1596 | |
---|
1597 | char_t* websGetRequestType(webs_t wp) |
---|
1598 | { |
---|
1599 | a_assert(websValid(wp)); |
---|
1600 | |
---|
1601 | return wp->type; |
---|
1602 | } |
---|
1603 | |
---|
1604 | /******************************************************************************/ |
---|
1605 | /* |
---|
1606 | * Return the username |
---|
1607 | */ |
---|
1608 | |
---|
1609 | char_t* websGetRequestUserName(webs_t wp) |
---|
1610 | { |
---|
1611 | a_assert(websValid(wp)); |
---|
1612 | |
---|
1613 | return wp->userName; |
---|
1614 | } |
---|
1615 | |
---|
1616 | /******************************************************************************/ |
---|
1617 | /* |
---|
1618 | * Get the number of bytes written |
---|
1619 | */ |
---|
1620 | |
---|
1621 | int websGetRequestWritten(webs_t wp) |
---|
1622 | { |
---|
1623 | a_assert(websValid(wp)); |
---|
1624 | |
---|
1625 | return wp->written; |
---|
1626 | } |
---|
1627 | |
---|
1628 | /******************************************************************************/ |
---|
1629 | /* |
---|
1630 | * Set the hostname |
---|
1631 | */ |
---|
1632 | |
---|
1633 | void websSetHost(char_t *host) |
---|
1634 | { |
---|
1635 | gstrncpy(websHost, host, TSZ(websHost)); |
---|
1636 | } |
---|
1637 | |
---|
1638 | /******************************************************************************/ |
---|
1639 | /* |
---|
1640 | * Set the host URL |
---|
1641 | */ |
---|
1642 | |
---|
1643 | void websSetHostUrl(char_t *url) |
---|
1644 | { |
---|
1645 | a_assert(url && *url); |
---|
1646 | |
---|
1647 | bfreeSafe(B_L, websHostUrl); |
---|
1648 | websHostUrl = gstrdup(B_L, url); |
---|
1649 | } |
---|
1650 | |
---|
1651 | /******************************************************************************/ |
---|
1652 | /* |
---|
1653 | * Set the IP address |
---|
1654 | */ |
---|
1655 | |
---|
1656 | void websSetIpaddr(char_t *ipaddr) |
---|
1657 | { |
---|
1658 | a_assert(ipaddr && *ipaddr); |
---|
1659 | |
---|
1660 | gstrncpy(websIpaddr, ipaddr, TSZ(websIpaddr)); |
---|
1661 | } |
---|
1662 | |
---|
1663 | /******************************************************************************/ |
---|
1664 | /* |
---|
1665 | * Set the number of bytes to write |
---|
1666 | */ |
---|
1667 | |
---|
1668 | void websSetRequestBytes(webs_t wp, int bytes) |
---|
1669 | { |
---|
1670 | a_assert(websValid(wp)); |
---|
1671 | a_assert(bytes >= 0); |
---|
1672 | |
---|
1673 | wp->numbytes = bytes; |
---|
1674 | } |
---|
1675 | |
---|
1676 | /******************************************************************************/ |
---|
1677 | /* |
---|
1678 | * Set the flags for this request |
---|
1679 | */ |
---|
1680 | |
---|
1681 | void websSetRequestFlags(webs_t wp, int flags) |
---|
1682 | { |
---|
1683 | a_assert(websValid(wp)); |
---|
1684 | |
---|
1685 | wp->flags = flags; |
---|
1686 | } |
---|
1687 | |
---|
1688 | /******************************************************************************/ |
---|
1689 | /* |
---|
1690 | * Set the local path for the request |
---|
1691 | */ |
---|
1692 | |
---|
1693 | void websSetRequestLpath(webs_t wp, char_t *lpath) |
---|
1694 | { |
---|
1695 | a_assert(websValid(wp)); |
---|
1696 | a_assert(lpath && *lpath); |
---|
1697 | |
---|
1698 | if (wp->lpath) { |
---|
1699 | bfree(B_L, wp->lpath); |
---|
1700 | } |
---|
1701 | wp->lpath = bstrdup(B_L, lpath); |
---|
1702 | websSetVar(wp, T("PATH_TRANSLATED"), wp->lpath); |
---|
1703 | } |
---|
1704 | |
---|
1705 | /******************************************************************************/ |
---|
1706 | /* |
---|
1707 | * Update the URL path and the directory containing the web page |
---|
1708 | */ |
---|
1709 | |
---|
1710 | void websSetRequestPath(webs_t wp, char_t *dir, char_t *path) |
---|
1711 | { |
---|
1712 | char_t *tmp; |
---|
1713 | |
---|
1714 | a_assert(websValid(wp)); |
---|
1715 | |
---|
1716 | if (dir) { |
---|
1717 | tmp = wp->dir; |
---|
1718 | wp->dir = bstrdup(B_L, dir); |
---|
1719 | if (tmp) { |
---|
1720 | bfree(B_L, tmp); |
---|
1721 | } |
---|
1722 | } |
---|
1723 | if (path) { |
---|
1724 | tmp = wp->path; |
---|
1725 | wp->path = bstrdup(B_L, path); |
---|
1726 | websSetVar(wp, T("PATH_INFO"), wp->path); |
---|
1727 | if (tmp) { |
---|
1728 | bfree(B_L, tmp); |
---|
1729 | } |
---|
1730 | } |
---|
1731 | } |
---|
1732 | |
---|
1733 | /******************************************************************************/ |
---|
1734 | /* |
---|
1735 | * Set the Write handler for this socket |
---|
1736 | */ |
---|
1737 | |
---|
1738 | void websSetRequestSocketHandler(webs_t wp, int mask, void (*fn)(webs_t wp)) |
---|
1739 | { |
---|
1740 | a_assert(websValid(wp)); |
---|
1741 | |
---|
1742 | wp->writeSocket = fn; |
---|
1743 | socketCreateHandler(wp->sid, SOCKET_WRITABLE, websSocketEvent, (int) wp); |
---|
1744 | } |
---|
1745 | |
---|
1746 | /******************************************************************************/ |
---|
1747 | /* |
---|
1748 | * Set the number of bytes written |
---|
1749 | */ |
---|
1750 | |
---|
1751 | void websSetRequestWritten(webs_t wp, int written) |
---|
1752 | { |
---|
1753 | a_assert(websValid(wp)); |
---|
1754 | |
---|
1755 | wp->written = written; |
---|
1756 | } |
---|
1757 | |
---|
1758 | /******************************************************************************/ |
---|
1759 | /* |
---|
1760 | * Reurn true if the webs handle is valid |
---|
1761 | */ |
---|
1762 | |
---|
1763 | int websValid(webs_t wp) |
---|
1764 | { |
---|
1765 | int wid; |
---|
1766 | |
---|
1767 | for (wid = 0; wid < websMax; wid++) { |
---|
1768 | if (wp == webs[wid]) { |
---|
1769 | return 1; |
---|
1770 | } |
---|
1771 | } |
---|
1772 | return 0; |
---|
1773 | } |
---|
1774 | |
---|
1775 | /******************************************************************************/ |
---|
1776 | /* |
---|
1777 | * Close the document handle. |
---|
1778 | */ |
---|
1779 | |
---|
1780 | int websCloseFileHandle(webs_t wp) |
---|
1781 | { |
---|
1782 | a_assert(websValid(wp)); |
---|
1783 | |
---|
1784 | #ifndef WEBS_PAGE_ROM |
---|
1785 | if (wp->docfd >= 0) { |
---|
1786 | close(wp->docfd); |
---|
1787 | wp->docfd = -1; |
---|
1788 | } |
---|
1789 | #endif |
---|
1790 | |
---|
1791 | return 0; |
---|
1792 | } |
---|
1793 | |
---|
1794 | /******************************************************************************/ |
---|
1795 | /* |
---|
1796 | * Build an ASCII time string. If sbuf is NULL we use the current time, |
---|
1797 | * else we use the last modified time of sbuf; |
---|
1798 | */ |
---|
1799 | |
---|
1800 | char_t* websGetDateString(websStatType* sbuf) |
---|
1801 | { |
---|
1802 | char_t* cp; |
---|
1803 | char_t* r; |
---|
1804 | time_t now; |
---|
1805 | |
---|
1806 | if (sbuf == NULL) { |
---|
1807 | time(&now); |
---|
1808 | } else { |
---|
1809 | now = sbuf->mtime; |
---|
1810 | } |
---|
1811 | if ((cp = gctime(&now)) != NULL) { |
---|
1812 | cp[gstrlen(cp) - 1] = '\0'; |
---|
1813 | r = bstrdup(B_L, cp); |
---|
1814 | return r; |
---|
1815 | } |
---|
1816 | return NULL; |
---|
1817 | } |
---|
1818 | |
---|
1819 | /******************************************************************************/ |
---|
1820 | /* |
---|
1821 | * Mark time. Set a timestamp so that, later, we can return the number of |
---|
1822 | * seconds since we made the mark. Note that the mark my not be a |
---|
1823 | * "real" time, but rather a relative marker. |
---|
1824 | */ |
---|
1825 | |
---|
1826 | static void websMarkTime(webs_t wp) |
---|
1827 | { |
---|
1828 | wp->timestamp = time(0); |
---|
1829 | } |
---|
1830 | |
---|
1831 | /******************************************************************************/ |
---|
1832 | /* |
---|
1833 | * Get the number of seconds since the last mark. |
---|
1834 | */ |
---|
1835 | |
---|
1836 | static int websGetTimeSinceMark(webs_t wp) |
---|
1837 | { |
---|
1838 | return time(0) - wp->timestamp; |
---|
1839 | } |
---|
1840 | |
---|
1841 | /******************************************************************************/ |
---|