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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_LM3Sxxxx_Eclipse/] [RTOSDemo/] [webserver/] [httpd.c] - Rev 593
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/** * \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) { 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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