122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
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/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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* This file is a modified version of the lwIP web server demo. The original
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* author is unknown because the file didn't contain any license information.
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*/
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/**
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* @file web.c
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* @brief HTTP server wrapper thread code.
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* @addtogroup WEB_THREAD
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* @{
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*/
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#include "ch.h"
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#include "lwip/opt.h"
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#include "lwip/arch.h"
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#include "lwip/api.h"
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#include "web.h"
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#if LWIP_NETCONN
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static const char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
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static const char http_index_html[] = "<html><head><title>Congrats!</title></head><body><h1>Welcome to our lwIP HTTP server!</h1><p>This is a small test page.</body></html>";
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static void http_server_serve(struct netconn *conn) {
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struct netbuf *inbuf;
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char *buf;
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u16_t buflen;
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err_t err;
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/* Read the data from the port, blocking if nothing yet there.
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We assume the request (the part we care about) is in one netbuf */
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err = netconn_recv(conn, &inbuf);
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if (err == ERR_OK) {
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netbuf_data(inbuf, (void **)&buf, &buflen);
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/* Is this an HTTP GET command? (only check the first 5 chars, since
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there are other formats for GET, and we're keeping it very simple )*/
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if (buflen>=5 &&
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buf[0]=='G' &&
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buf[1]=='E' &&
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buf[2]=='T' &&
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buf[3]==' ' &&
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buf[4]=='/' ) {
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/* Send the HTML header
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* subtract 1 from the size, since we dont send the \0 in the string
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* NETCONN_NOCOPY: our data is const static, so no need to copy it
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*/
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netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY);
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/* Send our HTML page */
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netconn_write(conn, http_index_html, sizeof(http_index_html)-1, NETCONN_NOCOPY);
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}
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}
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/* Close the connection (server closes in HTTP) */
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netconn_close(conn);
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/* Delete the buffer (netconn_recv gives us ownership,
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so we have to make sure to deallocate the buffer) */
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netbuf_delete(inbuf);
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}
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/**
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* Stack area for the http thread.
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*/
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THD_WORKING_AREA(wa_http_server, WEB_THREAD_STACK_SIZE);
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/**
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* HTTP server thread.
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*/
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THD_FUNCTION(http_server, p) {
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struct netconn *conn, *newconn;
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err_t err;
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(void)p;
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chRegSetThreadName("http");
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/* Create a new TCP connection handle */
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conn = netconn_new(NETCONN_TCP);
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LWIP_ERROR("http_server: invalid conn", (conn != NULL), chThdExit(MSG_RESET););
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/* Bind to port 80 (HTTP) with default IP address */
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netconn_bind(conn, NULL, WEB_THREAD_PORT);
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/* Put the connection into LISTEN state */
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netconn_listen(conn);
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/* Goes to the final priority after initialization.*/
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chThdSetPriority(WEB_THREAD_PRIORITY);
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while (true) {
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err = netconn_accept(conn, &newconn);
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if (err != ERR_OK)
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continue;
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http_server_serve(newconn);
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netconn_delete(newconn);
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}
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}
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#endif /* LWIP_NETCONN */
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/** @} */
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