2 * Copyright (C) 2010-2012 jeanfi@gmail.com
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #define _(str) gettext(str)
30 #include <sys/types.h>
31 #include <sys/select.h>
32 #include <sys/socket.h>
37 #include <microhttpd.h>
44 #include "psensor_json.h"
49 static const char *program_name;
51 #define DEFAULT_PORT 3131
53 #define PAGE_NOT_FOUND (_("<html><body><p>"\
54 "Page not found - Go to <a href='/'>Main page</a></p></body>"))
56 static struct option long_options[] = {
57 {"version", no_argument, 0, 'v'},
58 {"help", no_argument, 0, 'h'},
59 {"port", required_argument, 0, 'p'},
60 {"wdir", required_argument, 0, 'w'},
61 {"debug", no_argument, 0, 'd'},
65 static struct server_data server_data;
67 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
71 static int server_stop_requested;
75 printf("psensor-server %s\n", VERSION);
76 printf(_("Copyright (C) %s jeanfi@gmail.com\n"
77 "License GPLv2: GNU GPL version 2 or later "
78 "<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>\n"
79 "This is free software: you are free to change and redistribute it.\n"
80 "There is NO WARRANTY, to the extent permitted by law.\n"),
86 printf(_("Usage: %s [OPTION]...\n"), program_name);
88 puts(_("psensor-server is an HTTP server "
89 "for monitoring hardware sensors remotely."));
93 puts(_(" -h, --help display this help and exit\n"
94 " -v, --version display version information and exit"));
98 puts(_(" -d,--debug run in debug mode\n"
99 " -p,--port=PORT webserver port\n"
100 " -w,--wdir=DIR directory containing webserver pages"));
104 printf(_("Report bugs to: %s\n"), PACKAGE_BUGREPORT);
106 printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
110 Returns the file path corresponding to a given URL
112 char *get_path(const char *url, const char *www_dir)
117 if (!strlen(url) || !strcmp(url, ".") || !strcmp(url, "/"))
122 res = malloc(strlen(www_dir)+strlen(p)+1);
124 strcpy(res, www_dir);
130 #if MHD_VERSION >= 0x00090200
132 file_reader(void *cls, uint64_t pos, char *buf, size_t max)
135 file_reader(void *cls, uint64_t pos, char *buf, int max)
140 fseek(file, pos, SEEK_SET);
141 return fread(buf, 1, max, file);
144 struct MHD_Response *
145 create_response_api(const char *nurl,
147 unsigned int *rp_code)
149 struct MHD_Response *resp;
153 if (!strcmp(nurl, URL_BASE_API_1_0_SENSORS)) {
154 page = sensors_to_json_string(server_data.sensors);
156 } else if (!strcmp(nurl, URL_API_1_0_SYSINFO)) {
157 page = sysinfo_to_json_string(&server_data.psysinfo);
158 } else if (!strcmp(nurl, URL_API_1_0_CPU_USAGE)) {
159 page = sensor_to_json_string(server_data.cpu_usage);
161 } else if (!strncmp(nurl, URL_BASE_API_1_0_SENSORS,
162 strlen(URL_BASE_API_1_0_SENSORS))
163 && nurl[strlen(URL_BASE_API_1_0_SENSORS)] == '/') {
165 const char *sid = nurl + strlen(URL_BASE_API_1_0_SENSORS) + 1;
167 s = psensor_list_get_by_id(server_data.sensors, sid);
170 page = sensor_to_json_string(s);
172 } else if (debug && !strcmp(nurl, URL_API_1_0_SERVER_STOP)) {
174 server_stop_requested = 1;
175 page = strdup(_("<html><body><p>"
176 "Server stop requested</p></body></html>"));
180 *rp_code = MHD_HTTP_OK;
182 resp = MHD_create_response_from_data(strlen(page), page,
185 MHD_add_response_header(resp, MHD_HTTP_HEADER_CONTENT_TYPE,
194 struct MHD_Response *
195 create_response_file(const char *nurl,
197 unsigned int *rp_code,
204 ret = stat(fpath, &st);
206 if (!ret && (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) {
207 file = fopen(fpath, "rb");
210 *rp_code = MHD_HTTP_OK;
214 return MHD_create_response_from_data
215 (0, NULL, MHD_NO, MHD_NO);
218 return MHD_create_response_from_callback
223 (MHD_ContentReaderFreeCallback)&fclose);
226 log_printf(LOG_ERR, "Failed to open: %s\n", fpath);
233 struct MHD_Response *
234 create_response(const char *nurl, const char *method, unsigned int *rp_code)
236 struct MHD_Response *resp = NULL;
238 if (!strncmp(nurl, URL_BASE_API_1_0, strlen(URL_BASE_API_1_0))) {
239 resp = create_response_api(nurl, method, rp_code);
241 char *fpath = get_path(nurl, server_data.www_dir);
243 resp = create_response_file(nurl, method, rp_code, fpath);
251 char *page = strdup(PAGE_NOT_FOUND);
252 *rp_code = MHD_HTTP_NOT_FOUND;
254 return MHD_create_response_from_data
255 (strlen(page), page, MHD_YES, MHD_NO);
260 cbk_http_request(void *cls,
261 struct MHD_Connection *connection,
265 const char *upload_data,
266 size_t *upload_data_size, void **ptr)
269 struct MHD_Response *response;
272 unsigned int resp_code;
274 if (strcmp(method, "GET"))
277 if (&dummy != *ptr) {
278 /* The first time only the headers are valid, do not
279 respond in the first round... */
284 if (*upload_data_size)
287 *ptr = NULL; /* clear context pointer */
290 printf(_("HTTP Request: %s\n"), url);
292 nurl = url_normalize(url);
294 pthread_mutex_lock(&mutex);
295 response = create_response(nurl, method, &resp_code);
296 pthread_mutex_unlock(&mutex);
298 ret = MHD_queue_response(connection, resp_code, response);
299 MHD_destroy_response(response);
306 int main(int argc, char *argv[])
308 struct MHD_Daemon *d;
309 int port = DEFAULT_PORT;
313 program_name = argv[0];
315 setlocale(LC_ALL, "");
318 bindtextdomain(PACKAGE, LOCALEDIR);
322 server_data.www_dir = DEFAULT_WWW_DIR;
323 server_data.psysinfo.interfaces = NULL;
325 while ((optc = getopt_long(argc, argv,
326 "vhp:w:d", long_options, NULL)) != -1) {
330 server_data.www_dir = strdup(optarg);
351 if (!cmdok || optind != argc) {
352 fprintf(stderr, _("Try `%s --help' for more information.\n"),
359 server_data.sensors = get_all_sensors(600);
362 server_data.cpu_usage = create_cpu_usage_sensor(600);
365 if (!*server_data.sensors)
366 fprintf(stderr, _("ERROR: no sensors detected\n"));
368 d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION,
370 NULL, NULL, &cbk_http_request, server_data.sensors,
373 fprintf(stderr, _("ERROR: Fail to create web server\n"));
377 log_printf(LOG_INFO, _("Web server started on port: %d"), port);
378 log_printf(LOG_INFO, _("WWW directory: %s"), server_data.www_dir);
379 log_printf(LOG_INFO, _("URL: http://localhost:%d"), port);
381 while (!server_stop_requested) {
382 pthread_mutex_lock(&mutex);
385 sysinfo_update(&server_data.psysinfo);
386 cpu_usage_sensor_update(server_data.cpu_usage);
388 psensor_list_update_measures(server_data.sensors);
390 pthread_mutex_unlock(&mutex);
396 /* sanity cleanup for valgrind */
397 psensor_list_free(server_data.sensors);
399 psensor_free(server_data.cpu_usage);
401 free(server_data.www_dir);