1 /*$T httpd.c GC 1.138 11/17/07 13:10:22 */
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4 * \addtogroup apps @{ £
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5 * \defgroup httpd Web server @{ The uIP web server is a very simplistic
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6 * implementation of an HTTP server. It can serve web pages and files from a
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7 * read-only ROM filesystem, and provides a very small scripting language. £
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8 * \file Web server \author Adam Dunkels <adam@sics.se> £
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9 * Copyright (c) 2004, Adam Dunkels. All rights reserved. Redistribution and use
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10 * in source and binary forms, with or without modification, are permitted
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11 * provided that the following conditions are met: 1. Redistributions of source
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12 * code must retain the above copyright notice, this list of conditions and the
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13 * following disclaimer. 2. Redistributions in binary form must reproduce the
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14 * above copyright notice, this list of conditions and the following disclaimer in
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15 * the documentation and/or other materials provided with the distribution. 3.
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16 * Neither the name of the Institute nor the names of its contributors may be used
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17 * to endorse or promote products derived from this software without specific
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18 * prior written permission. THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND
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19 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
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20 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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21 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR
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22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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24 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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28 * OF SUCH DAMAGE. This file is part of the uIP TCP/IP stack. Author: Adam Dunkels
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29 * <adam@sics.se> $Id: httpd.c,v 1.2 2006/06/11 21:46:38 adam Exp $
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33 #include "httpd-fs.h"
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34 #include "httpd-cgi.h"
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35 #include "http-strings.h"
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39 #define STATE_WAITING 0
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40 #define STATE_OUTPUT 1
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43 #define ISO_space 0x20
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44 #define ISO_bang 0x21
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45 #define ISO_percent 0x25
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46 #define ISO_period 0x2e
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47 #define ISO_slash 0x2f
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48 #define ISO_colon 0x3a
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51 =======================================================================================================================
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52 =======================================================================================================================
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54 static unsigned short generate_part_of_file(void *state)
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56 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
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57 struct httpd_state *s = (struct httpd_state *) state;
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58 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
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60 if(s->file.len > uip_mss())
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66 s->len = s->file.len;
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69 memcpy(uip_appdata, s->file.data, s->len);
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75 =======================================================================================================================
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76 =======================================================================================================================
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78 static PT_THREAD(send_file (struct httpd_state *s))
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80 PSOCK_BEGIN(&s->sout);
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84 PSOCK_GENERATOR_SEND(&s->sout, generate_part_of_file, s);
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85 s->file.len -= s->len;
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86 s->file.data += s->len;
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87 } while(s->file.len > 0);
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89 PSOCK_END(&s->sout);
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93 =======================================================================================================================
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94 =======================================================================================================================
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96 static PT_THREAD(send_part_of_file (struct httpd_state *s))
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98 PSOCK_BEGIN(&s->sout);
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100 PSOCK_SEND(&s->sout, s->file.data, s->len);
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102 PSOCK_END(&s->sout);
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106 =======================================================================================================================
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107 =======================================================================================================================
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109 static void next_scriptstate(struct httpd_state *s)
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115 p = strchr(s->scriptptr, ISO_nl) + 1;
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116 s->scriptlen -= (unsigned short) (p - s->scriptptr);
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121 =======================================================================================================================
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122 =======================================================================================================================
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124 static PT_THREAD(handle_script (struct httpd_state *s))
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130 PT_BEGIN(&s->scriptpt);
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132 while(s->file.len > 0)
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134 /* Check if we should start executing a script. */
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135 if(*s->file.data == ISO_percent && *(s->file.data + 1) == ISO_bang)
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137 s->scriptptr = s->file.data + 3;
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138 s->scriptlen = s->file.len - 3;
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139 if(*(s->scriptptr - 1) == ISO_colon)
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141 httpd_fs_open(s->scriptptr + 1, &s->file);
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142 PT_WAIT_THREAD(&s->scriptpt, send_file(s));
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146 PT_WAIT_THREAD(&s->scriptpt, httpd_cgi(s->scriptptr) (s, s->scriptptr));
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149 next_scriptstate(s);
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152 * The script is over, so we reset the pointers and continue sending the rest of
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155 s->file.data = s->scriptptr;
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156 s->file.len = s->scriptlen;
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160 /* See if we find the start of script marker in the block of HTML to be sent. */
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161 if(s->file.len > uip_mss())
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163 s->len = uip_mss();
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167 s->len = s->file.len;
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170 if(*s->file.data == ISO_percent)
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172 ptr = strchr(s->file.data + 1, ISO_percent);
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176 ptr = strchr(s->file.data, ISO_percent);
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179 if(ptr != NULL && ptr != s->file.data)
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181 s->len = (int) (ptr - s->file.data);
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182 if(s->len >= uip_mss())
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184 s->len = uip_mss();
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188 PT_WAIT_THREAD(&s->scriptpt, send_part_of_file(s));
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189 s->file.data += s->len;
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190 s->file.len -= s->len;
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194 PT_END(&s->scriptpt);
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198 =======================================================================================================================
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199 =======================================================================================================================
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201 static PT_THREAD(send_headers (struct httpd_state *s, const char *statushdr))
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207 PSOCK_BEGIN(&s->sout);
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209 PSOCK_SEND_STR(&s->sout, statushdr);
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211 ptr = strrchr(s->filename, ISO_period);
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214 PSOCK_SEND_STR(&s->sout, http_content_type_binary);
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216 else if(strncmp(http_html, ptr, 5) == 0 || strncmp(http_shtml, ptr, 6) == 0)
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218 PSOCK_SEND_STR(&s->sout, http_content_type_html);
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220 else if(strncmp(http_css, ptr, 4) == 0)
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222 PSOCK_SEND_STR(&s->sout, http_content_type_css);
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224 else if(strncmp(http_png, ptr, 4) == 0)
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226 PSOCK_SEND_STR(&s->sout, http_content_type_png);
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228 else if(strncmp(http_gif, ptr, 4) == 0)
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230 PSOCK_SEND_STR(&s->sout, http_content_type_gif);
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232 else if(strncmp(http_jpg, ptr, 4) == 0)
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234 PSOCK_SEND_STR(&s->sout, http_content_type_jpg);
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238 PSOCK_SEND_STR(&s->sout, http_content_type_plain);
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241 PSOCK_END(&s->sout);
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245 =======================================================================================================================
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246 =======================================================================================================================
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248 static PT_THREAD(handle_output (struct httpd_state *s))
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254 PT_BEGIN(&s->outputpt);
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256 if(!httpd_fs_open(s->filename, &s->file))
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258 httpd_fs_open(http_404_html, &s->file);
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259 strcpy(s->filename, http_404_html);
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260 PT_WAIT_THREAD(&s->outputpt, send_headers(s, http_header_404));
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261 PT_WAIT_THREAD(&s->outputpt, send_file(s));
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265 PT_WAIT_THREAD(&s->outputpt, send_headers(s, http_header_200));
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266 ptr = strchr(s->filename, ISO_period);
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267 if(ptr != NULL && strncmp(ptr, http_shtml, 6) == 0)
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269 vProcessInput( s->filename );
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270 PT_INIT(&s->scriptpt);
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271 PT_WAIT_THREAD(&s->outputpt, handle_script(s));
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275 PT_WAIT_THREAD(&s->outputpt, send_file(s));
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279 PSOCK_CLOSE(&s->sout);
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280 PT_END(&s->outputpt);
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284 =======================================================================================================================
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285 =======================================================================================================================
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287 static PT_THREAD(handle_input (struct httpd_state *s))
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289 PSOCK_BEGIN(&s->sin);
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291 PSOCK_READTO(&s->sin, ISO_space);
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293 if(strncmp(s->inputbuf, http_get, 4) != 0)
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295 PSOCK_CLOSE_EXIT(&s->sin);
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298 PSOCK_READTO(&s->sin, ISO_space);
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300 if(s->inputbuf[0] != ISO_slash)
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302 PSOCK_CLOSE_EXIT(&s->sin);
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305 if(s->inputbuf[1] == ISO_space)
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307 strncpy(s->filename, http_index_html, sizeof(s->filename));
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311 s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
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313 /* Process any form input being sent to the server. */
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316 * extern void vApplicationProcessFormInput( char *pcInputString, long
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317 * xInputLength ); £
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318 * vApplicationProcessFormInput( s->inputbuf, PSOCK_DATALEN(&s->sin) );
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322 strncpy(s->filename, &s->inputbuf[0], sizeof(s->filename));
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325 /* httpd_log_file(uip_conn->ripaddr, s->filename); */
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326 s->state = STATE_OUTPUT;
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330 PSOCK_READTO(&s->sin, ISO_nl);
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332 if(strncmp(s->inputbuf, http_referer, 8) == 0)
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334 s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
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336 /* httpd_log(&s->inputbuf[9]); */
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340 PSOCK_END(&s->sin);
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344 =======================================================================================================================
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345 =======================================================================================================================
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347 static void handle_connection(struct httpd_state *s)
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350 if(s->state == STATE_OUTPUT)
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357 =======================================================================================================================
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358 =======================================================================================================================
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360 void httpd_appcall(void)
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362 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
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363 struct httpd_state *s = (struct httpd_state *) &(uip_conn->appstate);
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364 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
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366 if(uip_closed() || uip_aborted() || uip_timedout())
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369 else if(uip_connected())
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371 PSOCK_INIT(&s->sin, s->inputbuf, sizeof(s->inputbuf) - 1);
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372 PSOCK_INIT(&s->sout, s->inputbuf, sizeof(s->inputbuf) - 1);
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373 PT_INIT(&s->outputpt);
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374 s->state = STATE_WAITING;
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376 /* timer_set(&s->timer, CLOCK_SECOND * 100); */
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378 handle_connection(s);
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395 handle_connection(s);
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404 =======================================================================================================================
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405 \brief Initialize the web server This function initializes the web server and should be called at system boot-up.
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406 =======================================================================================================================
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408 void httpd_init(void)
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410 uip_listen(HTONS(80));
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