263 lines
7.9 KiB
C
263 lines
7.9 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: httpd-simple.c,v 1.5 2010/10/19 18:29:04 adamdunkels Exp $
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*/
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/**
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* \file
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* A simple web server forwarding page generation to a protothread
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* \author
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* Adam Dunkels <adam@sics.se>
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* Niclas Finne <nfi@sics.se>
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* Joakim Eriksson <joakime@sics.se>
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*/
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#include <stdio.h>
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#include <string.h>
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#include "contiki-net.h"
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//#include "urlconv.h"
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#include "httpd-simple.h"
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#define webserver_log_file(...)
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#define webserver_log(...)
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#ifndef WEBSERVER_CONF_CFS_CONNS
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#define CONNS UIP_CONNS
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#else /* WEBSERVER_CONF_CFS_CONNS */
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#define CONNS WEBSERVER_CONF_CFS_CONNS
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#endif /* WEBSERVER_CONF_CFS_CONNS */
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#ifndef WEBSERVER_CONF_CFS_URLCONV
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#define URLCONV 0
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#else /* WEBSERVER_CONF_CFS_URLCONV */
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#define URLCONV WEBSERVER_CONF_CFS_URLCONV
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#endif /* WEBSERVER_CONF_CFS_URLCONV */
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#define STATE_WAITING 0
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#define STATE_OUTPUT 1
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MEMB(conns, struct httpd_state, CONNS);
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#define ISO_nl 0x0a
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#define ISO_space 0x20
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#define ISO_period 0x2e
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#define ISO_slash 0x2f
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/*---------------------------------------------------------------------------*/
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static const char *NOT_FOUND = "<html><body bgcolor=\"white\">"
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"<center>"
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"<h1>404 - file not found</h1>"
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"</center>"
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"</body>"
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"</html>";
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/*---------------------------------------------------------------------------*/
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static
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PT_THREAD(send_string(struct httpd_state *s, const char *str))
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{
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PSOCK_BEGIN(&s->sout);
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SEND_STRING(&s->sout, str);
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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const char http_content_type_html[] = "Content-type: text/html\r\n\r\n";
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static
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PT_THREAD(send_headers(struct httpd_state *s, const char *statushdr))
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{
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/* char *ptr; */
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PSOCK_BEGIN(&s->sout);
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SEND_STRING(&s->sout, statushdr);
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/* ptr = strrchr(s->filename, ISO_period); */
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/* if(ptr == NULL) { */
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/* s->ptr = http_content_type_plain; */
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/* } else if(strcmp(http_html, ptr) == 0) { */
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/* s->ptr = http_content_type_html; */
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/* } else if(strcmp(http_css, ptr) == 0) { */
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/* s->ptr = http_content_type_css; */
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/* } else if(strcmp(http_png, ptr) == 0) { */
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/* s->ptr = http_content_type_png; */
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/* } else if(strcmp(http_gif, ptr) == 0) { */
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/* s->ptr = http_content_type_gif; */
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/* } else if(strcmp(http_jpg, ptr) == 0) { */
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/* s->ptr = http_content_type_jpg; */
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/* } else { */
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/* s->ptr = http_content_type_binary; */
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/* } */
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/* SEND_STRING(&s->sout, s->ptr); */
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SEND_STRING(&s->sout, http_content_type_html);
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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const char http_header_200[] = "HTTP/1.0 200 OK\r\nServer: Contiki/2.4 http://www.sics.se/contiki/\r\nConnection: close\r\n";
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const char http_header_404[] = "HTTP/1.0 404 Not found\r\nServer: Contiki/2.4 http://www.sics.se/contiki/\r\nConnection: close\r\n";
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static
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PT_THREAD(handle_output(struct httpd_state *s))
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{
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PT_BEGIN(&s->outputpt);
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s->script = NULL;
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s->script = httpd_simple_get_script(&s->filename[1]);
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if(s->script == NULL) {
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strncpy(s->filename, "/notfound.html", sizeof(s->filename));
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PT_WAIT_THREAD(&s->outputpt,
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send_headers(s, http_header_404));
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PT_WAIT_THREAD(&s->outputpt,
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send_string(s, NOT_FOUND));
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uip_close();
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webserver_log_file(&uip_conn->ripaddr, "404 - not found");
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PT_EXIT(&s->outputpt);
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} else {
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PT_WAIT_THREAD(&s->outputpt,
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send_headers(s, http_header_200));
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PT_WAIT_THREAD(&s->outputpt, s->script(s));
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}
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s->script = NULL;
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PSOCK_CLOSE(&s->sout);
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PT_END(&s->outputpt);
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}
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/*---------------------------------------------------------------------------*/
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const char http_get[] = "GET ";
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const char http_index_html[] = "/index.html";
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//const char http_referer[] = "Referer:"
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static
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PT_THREAD(handle_input(struct httpd_state *s))
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{
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PSOCK_BEGIN(&s->sin);
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PSOCK_READTO(&s->sin, ISO_space);
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if(strncmp(s->inputbuf, http_get, 4) != 0) {
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PSOCK_CLOSE_EXIT(&s->sin);
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}
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PSOCK_READTO(&s->sin, ISO_space);
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if(s->inputbuf[0] != ISO_slash) {
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PSOCK_CLOSE_EXIT(&s->sin);
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}
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#if URLCONV
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s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
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urlconv_tofilename(s->filename, s->inputbuf, sizeof(s->filename));
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#else /* URLCONV */
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if(s->inputbuf[1] == ISO_space) {
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strncpy(s->filename, http_index_html, sizeof(s->filename));
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} else {
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s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
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strncpy(s->filename, s->inputbuf, sizeof(s->filename));
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}
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#endif /* URLCONV */
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webserver_log_file(&uip_conn->ripaddr, s->filename);
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s->state = STATE_OUTPUT;
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while(1) {
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PSOCK_READTO(&s->sin, ISO_nl);
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#if 0
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if(strncmp(s->inputbuf, http_referer, 8) == 0) {
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s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
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webserver_log(s->inputbuf);
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}
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#endif
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}
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PSOCK_END(&s->sin);
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}
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/*---------------------------------------------------------------------------*/
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static void
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handle_connection(struct httpd_state *s)
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{
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handle_input(s);
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if(s->state == STATE_OUTPUT) {
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handle_output(s);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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httpd_appcall(void *state)
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{
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struct httpd_state *s = (struct httpd_state *)state;
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if(uip_closed() || uip_aborted() || uip_timedout()) {
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if(s != NULL) {
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s->script = NULL;
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memb_free(&conns, s);
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}
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} else if(uip_connected()) {
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s = (struct httpd_state *)memb_alloc(&conns);
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if(s == NULL) {
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uip_abort();
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webserver_log_file(&uip_conn->ripaddr, "reset (no memory block)");
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return;
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}
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tcp_markconn(uip_conn, s);
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PSOCK_INIT(&s->sin, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
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PSOCK_INIT(&s->sout, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
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PT_INIT(&s->outputpt);
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s->script = NULL;
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s->state = STATE_WAITING;
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timer_set(&s->timer, CLOCK_SECOND * 10);
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handle_connection(s);
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} else if(s != NULL) {
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if(uip_poll()) {
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if(timer_expired(&s->timer)) {
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uip_abort();
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s->script = NULL;
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memb_free(&conns, s);
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webserver_log_file(&uip_conn->ripaddr, "reset (timeout)");
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}
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} else {
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timer_restart(&s->timer);
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}
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handle_connection(s);
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} else {
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uip_abort();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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httpd_init(void)
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{
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tcp_listen(UIP_HTONS(80));
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memb_init(&conns);
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#if URLCONV
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urlconv_init();
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#endif /* URLCONV */
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}
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/*---------------------------------------------------------------------------*/
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