/** * \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,v 1.2 2006/06/11 21:46:38 adam Exp $ */#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 shortgenerate_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;}/*---------------------------------------------------------------------------*/staticPT_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);}/*---------------------------------------------------------------------------*/staticPT_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 voidnext_scriptstate(struct httpd_state *s){  char *p;  p = strchr(s->scriptptr, ISO_nl) + 1;  s->scriptlen -= (unsigned short)(p - s->scriptptr);  s->scriptptr = p;}/*---------------------------------------------------------------------------*/staticPT_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);}/*---------------------------------------------------------------------------*/staticPT_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);}/*---------------------------------------------------------------------------*/staticPT_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);}/*---------------------------------------------------------------------------*/staticPT_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;    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 voidhandle_connection(struct httpd_state *s){  handle_input(s);  if(s->state == STATE_OUTPUT) {    handle_output(s);  }}/*---------------------------------------------------------------------------*/voidhttpd_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. */voidhttpd_init(void){  uip_listen(HTONS(80));}/*---------------------------------------------------------------------------*//** @} */