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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM7_AT91SAM7X256_Eclipse/] [RTOSDemo/] [webserver/] [httpd.c] - Rev 779
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/*$T httpd.c GC 1.138 11/17/07 13:10:22 */ /* * \addtogroup apps @{ £ * \defgroup httpd Web server @{ The uIP web server is a very simplistic * implementation of an HTTP server. It can serve web pages and files from a * read-only ROM filesystem, and provides a very small scripting language. £ * \file Web server \author Adam Dunkels <adam@sics.se> £ * Copyright (c) 2004, Adam Dunkels. All rights reserved. Redistribution and use * in source and binary forms, with or without modification, are permitted * provided that the following conditions are met: 1. Redistributions of source * code must retain the above copyright notice, this list of conditions and the * following disclaimer. 2. Redistributions in binary form must reproduce the * above copyright notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the distribution. 3. * Neither the name of the Institute nor the names of its contributors may be used * to endorse or promote products derived from this software without specific * prior written permission. THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. This file is part of the uIP TCP/IP stack. Author: Adam Dunkels * <adam@sics.se> $Id: httpd.c 2 2011-07-17 20:13:17Z filepang@gmail.com $ */ #include "uip.h" #include "httpd.h" #include "httpd-fs.h" #include "httpd-cgi.h" #include "http-strings.h" #include <string.h> #define STATE_WAITING 0 #define STATE_OUTPUT 1 #define ISO_nl 0x0a #define ISO_space 0x20 #define ISO_bang 0x21 #define ISO_percent 0x25 #define ISO_period 0x2e #define ISO_slash 0x2f #define ISO_colon 0x3a /* ======================================================================================================================= ======================================================================================================================= */ static unsigned short generate_part_of_file(void *state) { /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ struct httpd_state *s = (struct httpd_state *) state; /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ if(s->file.len > uip_mss()) { s->len = uip_mss(); } else { s->len = s->file.len; } memcpy(uip_appdata, s->file.data, s->len); return s->len; } /* ======================================================================================================================= ======================================================================================================================= */ static PT_THREAD(send_file (struct httpd_state *s)) { PSOCK_BEGIN(&s->sout); do { PSOCK_GENERATOR_SEND(&s->sout, generate_part_of_file, s); s->file.len -= s->len; s->file.data += s->len; } while(s->file.len > 0); PSOCK_END(&s->sout); } /* ======================================================================================================================= ======================================================================================================================= */ static PT_THREAD(send_part_of_file (struct httpd_state *s)) { PSOCK_BEGIN(&s->sout); PSOCK_SEND(&s->sout, s->file.data, s->len); PSOCK_END(&s->sout); } /* ======================================================================================================================= ======================================================================================================================= */ static void next_scriptstate(struct httpd_state *s) { /*~~~~~~~*/ char *p; /*~~~~~~~*/ p = strchr(s->scriptptr, ISO_nl) + 1; s->scriptlen -= (unsigned short) (p - s->scriptptr); s->scriptptr = p; } /* ======================================================================================================================= ======================================================================================================================= */ static PT_THREAD(handle_script (struct httpd_state *s)) { /*~~~~~~~~~*/ char *ptr; /*~~~~~~~~~*/ PT_BEGIN(&s->scriptpt); while(s->file.len > 0) { /* Check if we should start executing a script. */ if(*s->file.data == ISO_percent && *(s->file.data + 1) == ISO_bang) { s->scriptptr = s->file.data + 3; s->scriptlen = s->file.len - 3; if(*(s->scriptptr - 1) == ISO_colon) { httpd_fs_open(s->scriptptr + 1, &s->file); PT_WAIT_THREAD(&s->scriptpt, send_file(s)); } else { PT_WAIT_THREAD(&s->scriptpt, httpd_cgi(s->scriptptr) (s, s->scriptptr)); } next_scriptstate(s); /* * The script is over, so we reset the pointers and continue sending the rest of * the file. */ s->file.data = s->scriptptr; s->file.len = s->scriptlen; } else { /* See if we find the start of script marker in the block of HTML to be sent. */ if(s->file.len > uip_mss()) { s->len = uip_mss(); } else { s->len = s->file.len; } if(*s->file.data == ISO_percent) { ptr = strchr(s->file.data + 1, ISO_percent); } else { ptr = strchr(s->file.data, ISO_percent); } if(ptr != NULL && ptr != s->file.data) { s->len = (int) (ptr - s->file.data); if(s->len >= uip_mss()) { s->len = uip_mss(); } } PT_WAIT_THREAD(&s->scriptpt, send_part_of_file(s)); s->file.data += s->len; s->file.len -= s->len; } } PT_END(&s->scriptpt); } /* ======================================================================================================================= ======================================================================================================================= */ static PT_THREAD(send_headers (struct httpd_state *s, const char *statushdr)) { /*~~~~~~~~~*/ char *ptr; /*~~~~~~~~~*/ PSOCK_BEGIN(&s->sout); PSOCK_SEND_STR(&s->sout, statushdr); ptr = strrchr(s->filename, ISO_period); if(ptr == NULL) { PSOCK_SEND_STR(&s->sout, http_content_type_binary); } else if(strncmp(http_html, ptr, 5) == 0 || strncmp(http_shtml, ptr, 6) == 0) { PSOCK_SEND_STR(&s->sout, http_content_type_html); } else if(strncmp(http_css, ptr, 4) == 0) { PSOCK_SEND_STR(&s->sout, http_content_type_css); } else if(strncmp(http_png, ptr, 4) == 0) { PSOCK_SEND_STR(&s->sout, http_content_type_png); } else if(strncmp(http_gif, ptr, 4) == 0) { PSOCK_SEND_STR(&s->sout, http_content_type_gif); } else if(strncmp(http_jpg, ptr, 4) == 0) { PSOCK_SEND_STR(&s->sout, http_content_type_jpg); } else { PSOCK_SEND_STR(&s->sout, http_content_type_plain); } PSOCK_END(&s->sout); } /* ======================================================================================================================= ======================================================================================================================= */ static PT_THREAD(handle_output (struct httpd_state *s)) { /*~~~~~~~~~*/ char *ptr; /*~~~~~~~~~*/ PT_BEGIN(&s->outputpt); if(!httpd_fs_open(s->filename, &s->file)) { httpd_fs_open(http_404_html, &s->file); strcpy(s->filename, http_404_html); PT_WAIT_THREAD(&s->outputpt, send_headers(s, http_header_404)); PT_WAIT_THREAD(&s->outputpt, send_file(s)); } else { PT_WAIT_THREAD(&s->outputpt, send_headers(s, http_header_200)); ptr = strchr(s->filename, ISO_period); if(ptr != NULL && strncmp(ptr, http_shtml, 6) == 0) { vProcessInput( s->filename ); PT_INIT(&s->scriptpt); PT_WAIT_THREAD(&s->outputpt, handle_script(s)); } else { PT_WAIT_THREAD(&s->outputpt, send_file(s)); } } PSOCK_CLOSE(&s->sout); PT_END(&s->outputpt); } /* ======================================================================================================================= ======================================================================================================================= */ static PT_THREAD(handle_input (struct httpd_state *s)) { PSOCK_BEGIN(&s->sin); PSOCK_READTO(&s->sin, ISO_space); if(strncmp(s->inputbuf, http_get, 4) != 0) { PSOCK_CLOSE_EXIT(&s->sin); } PSOCK_READTO(&s->sin, ISO_space); if(s->inputbuf[0] != ISO_slash) { PSOCK_CLOSE_EXIT(&s->sin); } if(s->inputbuf[1] == ISO_space) { strncpy(s->filename, http_index_html, sizeof(s->filename)); } else { s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0; /* Process any form input being sent to the server. */ { /* * extern void vApplicationProcessFormInput( char *pcInputString, long * xInputLength ); £ * vApplicationProcessFormInput( s->inputbuf, PSOCK_DATALEN(&s->sin) ); */ } strncpy(s->filename, &s->inputbuf[0], sizeof(s->filename)); } /* httpd_log_file(uip_conn->ripaddr, s->filename); */ s->state = STATE_OUTPUT; while(1) { PSOCK_READTO(&s->sin, ISO_nl); if(strncmp(s->inputbuf, http_referer, 8) == 0) { s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0; /* httpd_log(&s->inputbuf[9]); */ } } PSOCK_END(&s->sin); } /* ======================================================================================================================= ======================================================================================================================= */ static void handle_connection(struct httpd_state *s) { handle_input(s); if(s->state == STATE_OUTPUT) { handle_output(s); } } /* ======================================================================================================================= ======================================================================================================================= */ void httpd_appcall(void) { /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ struct httpd_state *s = (struct httpd_state *) &(uip_conn->appstate); /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ if(uip_closed() || uip_aborted() || uip_timedout()) { } else if(uip_connected()) { PSOCK_INIT(&s->sin, s->inputbuf, sizeof(s->inputbuf) - 1); PSOCK_INIT(&s->sout, s->inputbuf, sizeof(s->inputbuf) - 1); PT_INIT(&s->outputpt); s->state = STATE_WAITING; /* timer_set(&s->timer, CLOCK_SECOND * 100); */ s->timer = 0; handle_connection(s); } else if(s != NULL) { if(uip_poll()) { ++s->timer; if(s->timer >= 20) { uip_abort(); } } else { s->timer = 0; } handle_connection(s); } else { uip_abort(); } } /* ======================================================================================================================= \brief Initialize the web server This function initializes the web server and should be called at system boot-up. ======================================================================================================================= */ void httpd_init(void) { uip_listen(HTONS(80)); } /* @} */
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