4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
33 * \author Daniele Basile <asterix@develer.com>
35 * \brief Simple Http server.
37 * This simple web server read the site's pages from SD card, and manage
38 * the cases where SD is not present or page not found, using embedded pages.
39 * Quering from browser the /status page, the server return a json dictionary where are store
40 * some board status info, like board temperature, up-time, etc.
48 #include "hw/hw_http.h"
50 #include "cfg/cfg_http.h"
52 // Define logging setting (for cfg/log.h module).
53 #define LOG_LEVEL HTTP_LOG_LEVEL
54 #define LOG_VERBOSITY HTTP_LOG_FORMAT
61 static const char http_html_hdr_200[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
62 static const char http_html_hdr_404[] = "HTTP/1.1 404 Not Found\r\nContent-type: text/html\r\n\r\n";
63 static const char http_html_hdr_500[] = "HTTP/1.1 500 Internal Server Error\r\nContent-type: text/html\r\n\r\n";
65 static HttpCGI *cgi_table;
66 static http_handler_t http_callback;
69 * Send on \param client socket
70 * the 200 Ok http header
72 void http_sendOk(struct netconn *client)
74 netconn_write(client, http_html_hdr_200, sizeof(http_html_hdr_200) - 1, NETCONN_NOCOPY);
79 * Send on \param client socket
80 * the 404 File not found http header
82 void http_sendFileNotFound(struct netconn *client)
84 netconn_write(client, http_html_hdr_404, sizeof(http_html_hdr_404) - 1, NETCONN_NOCOPY);
88 * Send on \param client socket
89 * the 500 internal server error http header
91 void http_sendInternalErr(struct netconn *client)
93 netconn_write(client, http_html_hdr_500, sizeof(http_html_hdr_500) - 1, NETCONN_NOCOPY);
96 static void get_fileName(const char *revc_buf, size_t recv_len, char *name, size_t len)
99 char *p = strstr(revc_buf, "GET");
102 /* Find the end of the page request. */
103 char *stop = strstr(revc_buf, "HTTP");
106 LOG_ERR("Bad GET request\n");
111 /* skip the "/" in get string request */
112 p += sizeof("GET") + 1;
116 if ((size_t)i == len || (size_t)i >= recv_len)
126 /* Trail white space in the string. */
128 if (name[i] != ' ' && name[i] != '\t' && name[i] != '\n')
134 INLINE const char *get_ext(const char *name)
136 const char *ext = strstr(name, ".");
143 static http_handler_t cgi_search(const char *name, HttpCGI *table)
149 const char *ext = get_ext(name);
150 LOG_INFO("EXT %s\n", ext);
153 if (ext && table[i].type == CGI_MATCH_EXT)
155 LOG_INFO("Match all ext %s\n", ext);
156 if (!strcmp(table[i].name, ext))
159 else /* (table[i].type == CGI_MATCH_NAME) */
161 LOG_INFO("Match all name %s\n", name);
162 if (!strcmp(table[i].name, name))
169 return table[i].handler;
172 static char req_string[80];
175 * Http polling function.
177 * Call this functions to process each client connections.
180 void http_poll(struct netconn *server)
182 struct netconn *client;
183 struct netbuf *rx_buf_conn;
187 client = netconn_accept(server);
191 rx_buf_conn = netconn_recv(client);
194 netbuf_data(rx_buf_conn, (void **)&rx_buf, &len);
197 memset(req_string, 0, sizeof(req_string));
198 get_fileName(rx_buf, len, req_string, sizeof(req_string));
200 LOG_INFO("Search %s\n", req_string);
201 if (req_string[0] == '\0')
202 strcpy(req_string, HTTP_DEFAULT_PAGE);
204 http_handler_t cgi = cgi_search(req_string, cgi_table);
207 if (cgi(client, req_string, rx_buf, len) < 0)
209 LOG_ERR("Internal server error\n");
210 http_sendInternalErr(client);
211 netconn_write(client, http_server_error, http_server_error_len - 1, NETCONN_NOCOPY);
216 http_callback(client, req_string, rx_buf, len);
219 netconn_close(client);
220 netbuf_delete(rx_buf_conn);
222 netconn_delete(client);
226 * Init the http server.
228 * The simply http server call for each client request the default_callback function. The
229 * user should define this callback to manage the client request, i.e. reading site's page
230 * from SD card. The user can define the cgi_table, where associate one callback to the user string.
231 * In this way the user could filter some client request and redirect they to custom callback, i.e.
232 * the client could request status of the device only loading the particular page name.
234 * \param default_callback fuction that server call for all request, that does'nt match cgi table.
235 * \param table of callcack to call when client request a particular page.
237 void http_init(http_handler_t default_callback, struct HttpCGI *table)
239 ASSERT(default_callback);
242 http_callback = default_callback;