osd-contiki/apps/webserver/httpd-cfs.c

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/*
* 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 Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: httpd-cfs.c,v 1.4 2007/11/22 11:25:08 oliverschmidt Exp $
*/
#include <string.h>
#include "contiki-net.h"
#include "cfs/cfs.h"
#include "webserver.h"
#include "httpd-cfs.h"
#define STATE_WAITING 0
#define STATE_OUTPUT 1
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#define SEND_STRING(s, str) PSOCK_SEND(s, (uint8_t *)str, strlen(str))
MEMB(conns, struct httpd_state, 3);
/*---------------------------------------------------------------------------*/
static
PT_THREAD(send_file(struct httpd_state *s))
{
PSOCK_BEGIN(&s->sout);
do {
/* Read data from file system into buffer */
s->len = cfs_read(s->fd, s->outputbuf, sizeof(s->outputbuf));
/* If there is data in the buffer, send it */
if(s->len > 0) {
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PSOCK_SEND(&s->sout, (uint8_t *)s->outputbuf, s->len);
} else {
break;
}
} while(s->len > 0);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(send_headers(struct httpd_state *s, char *statushdr))
{
char *ptr;
PSOCK_BEGIN(&s->sout);
SEND_STRING(&s->sout, statushdr);
SEND_STRING(&s->sout, "Server: " CONTIKI_VERSION_STRING "\r\n");
ptr = strrchr(s->filename, '.');
if(ptr == NULL) {
SEND_STRING(&s->sout, "Content-type: text/plain\r\n\r\n");
} else if(strncmp(".html", ptr, 5) == 0) {
SEND_STRING(&s->sout, "Content-type: text/html\r\n\r\n");
} else if(strncmp(".css", ptr, 4) == 0) {
SEND_STRING(&s->sout, "Content-type: text/css\r\n\r\n");
} else if(strncmp(".png", ptr, 4) == 0) {
SEND_STRING(&s->sout, "Content-type: image/png\r\n\r\n");
} else if(strncmp(".jpg", ptr, 4) == 0) {
SEND_STRING(&s->sout, "Content-type: image/jpeg\r\n\r\n");
} else {
SEND_STRING(&s->sout, "Content-type: application/octet-stream\r\n\r\n");
}
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(handle_output(struct httpd_state *s))
{
PT_BEGIN(&s->outputpt);
s->fd = cfs_open(s->filename, CFS_READ);
if(s->fd < 0) {
s->fd = cfs_open("404.html", CFS_READ);
if(s->fd < 0) {
uip_abort();
webserver_log_file(&uip_conn->ripaddr, "reset (no 404.html)");
PT_EXIT(&s->outputpt);
}
PT_WAIT_THREAD(&s->outputpt,
send_headers(s, "HTTP/1.0 404 Not found\r\n"));
} else {
PT_WAIT_THREAD(&s->outputpt,
send_headers(s, "HTTP/1.0 200 OK\r\n"));
}
PT_WAIT_THREAD(&s->outputpt, send_file(s));
cfs_close(s->fd);
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, ' ');
if(strncmp(s->inputbuf, "GET ", 4) != 0) {
PSOCK_CLOSE_EXIT(&s->sin);
}
PSOCK_READTO(&s->sin, ' ');
if(s->inputbuf[0] != '/') {
PSOCK_CLOSE_EXIT(&s->sin);
}
if(s->inputbuf[1] == ' ') {
strncpy(s->filename, "index.html", sizeof(s->filename));
} else {
s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
strncpy(s->filename, &s->inputbuf[1], sizeof(s->filename));
}
webserver_log_file(&uip_conn->ripaddr, s->filename);
s->state = STATE_OUTPUT;
while(1) {
PSOCK_READTO(&s->sin, '\n');
if(strncmp(s->inputbuf, "Referer:", 8) == 0) {
s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
webserver_log(s->inputbuf);
}
}
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 *state)
{
struct httpd_state *s = (struct httpd_state *)state;
if(uip_closed() || uip_aborted() || uip_timedout()) {
if(s != NULL) {
memb_free(&conns, s);
}
} else if(uip_connected()) {
s = (struct httpd_state *)memb_alloc(&conns);
if(s == NULL) {
uip_abort();
webserver_log_file(&uip_conn->ripaddr, "reset (no memory block)");
return;
}
tcp_markconn(uip_conn, s);
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PSOCK_INIT(&s->sin, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
PSOCK_INIT(&s->sout, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
PT_INIT(&s->outputpt);
s->state = STATE_WAITING;
timer_set(&s->timer, CLOCK_SECOND * 10);
handle_connection(s);
} else if(s != NULL) {
if(uip_poll()) {
if(timer_expired(&s->timer)) {
uip_abort();
webserver_log_file(&uip_conn->ripaddr, "reset (timeout)");
}
} else {
timer_reset(&s->timer);
}
handle_connection(s);
} else {
uip_abort();
}
}
/*---------------------------------------------------------------------------*/
void
httpd_init(void)
{
tcp_listen(HTONS(80));
memb_init(&conns);
}
/*---------------------------------------------------------------------------*/