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
62 static const char http_html_hdr_200[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
63 static const char http_html_hdr_404[] = "HTTP/1.1 404 Not Found\r\nContent-type: text/html\r\n\r\n";
64 static const char http_html_hdr_500[] = "HTTP/1.1 500 Internal Server Error\r\nContent-type: text/html\r\n\r\n";
66 static HttpCGI *cgi_table;
67 static http_handler_t http_callback;
70 static char http_hexToAscii(char first, char second)
78 return strtol(hex, &stop, 16);
81 void http_decodeUri(const char *raw_buf, size_t raw_len, char *decodec_buf, size_t len)
84 for (size_t i = 0; i < raw_len; i++)
89 if (raw_buf[i] == '%')
93 /* convert hex value after % */
94 value = http_hexToAscii(raw_buf[i + 1], raw_buf[i + 2]);
97 *decodec_buf++ = value;
104 *decodec_buf++ = raw_buf[i];
109 void http_getPageName(const char *recv_buf, size_t recv_len, char *page_name, size_t len)
114 if (recv_buf && (recv_len > sizeof("GET /")))
116 if (*recv_buf++ == 'G' &&
117 *recv_buf++ == 'E' && *recv_buf++ == 'T')
120 /* skip the space and "/" */
127 while ((size_t)i < recv_len)
129 char ch = *(recv_buf++);
130 if (ch == ' ' || ch == '\t' || ch == '\n')
132 if((size_t)i == len - 1)
141 INLINE const char *get_ext(const char *name)
143 const char *ext = strstr(name, ".");
152 * Send on \param client socket
153 * the 200 Ok http header
155 void http_sendOk(struct netconn *client)
157 netconn_write(client, http_html_hdr_200, sizeof(http_html_hdr_200) - 1, NETCONN_NOCOPY);
162 * Send on \param client socket
163 * the 404 File not found http header
165 void http_sendFileNotFound(struct netconn *client)
167 netconn_write(client, http_html_hdr_404, sizeof(http_html_hdr_404) - 1, NETCONN_NOCOPY);
171 * Send on \param client socket
172 * the 500 internal server error http header
174 void http_sendInternalErr(struct netconn *client)
176 netconn_write(client, http_html_hdr_500, sizeof(http_html_hdr_500) - 1, NETCONN_NOCOPY);
179 static http_handler_t cgi_search(const char *name, HttpCGI *table)
185 const char *ext = get_ext(name);
186 LOG_INFO("EXT %s\n", ext);
189 if (ext && table[i].type == CGI_MATCH_EXT)
191 LOG_INFO("Match all ext %s\n", ext);
192 if (!strcmp(table[i].name, ext))
195 else if (table[i].type == CGI_MATCH_NAME)
197 LOG_INFO("Match all name %s\n", name);
198 if (strstr(name, table[i].name) != NULL)
201 else /* (table[i].type == CGI_MATCH_WORD) */
203 LOG_INFO("Match all word %s\n", name);
204 if (!strcmp(table[i].name, name))
211 return table[i].handler;
214 static char req_string[80];
217 * Http polling function.
219 * Call this functions to process each client connections.
222 void http_poll(struct netconn *server)
224 struct netconn *client;
225 struct netbuf *rx_buf_conn;
229 client = netconn_accept(server);
233 rx_buf_conn = netconn_recv(client);
236 netbuf_data(rx_buf_conn, (void **)&rx_buf, &len);
239 memset(req_string, 0, sizeof(req_string));
240 http_getPageName(rx_buf, len, req_string, sizeof(req_string));
242 LOG_INFO("Search %s\n", req_string);
243 if (req_string[0] == '\0')
244 strcpy(req_string, HTTP_DEFAULT_PAGE);
246 http_handler_t cgi = cgi_search(req_string, cgi_table);
249 if (cgi(client, req_string, rx_buf, len) < 0)
251 LOG_ERR("Internal server error\n");
252 http_sendInternalErr(client);
253 netconn_write(client, http_server_error, http_server_error_len - 1, NETCONN_NOCOPY);
258 http_callback(client, req_string, rx_buf, len);
261 netconn_close(client);
262 netbuf_delete(rx_buf_conn);
264 netconn_delete(client);
268 * Init the http server.
270 * The simply http server call for each client request the default_callback function. The
271 * user should define this callback to manage the client request, i.e. reading site's page
272 * from SD card. The user can define the cgi_table, where associate one callback to the user string.
273 * In this way the user could filter some client request and redirect they to custom callback, i.e.
274 * the client could request status of the device only loading the particular page name.
276 * \param default_callback fuction that server call for all request, that does'nt match cgi table.
277 * \param table of callcack to call when client request a particular page.
279 void http_init(http_handler_t default_callback, struct HttpCGI *table)
281 ASSERT(default_callback);
284 http_callback = default_callback;