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>
45 #include "psensor_json.h"
49 static const char *DEFAULT_LOG_FILE = "/var/log/psensor-server.log";
51 #define HTML_STOP_REQUESTED \
52 (_("<html><body><p>Server stop requested</p></body></html>"))
54 static const char *program_name;
56 #define DEFAULT_PORT 3131
58 #define PAGE_NOT_FOUND (_("<html><body><p>"\
59 "Page not found - Go to <a href='/'>Main page</a></p></body>"))
61 static struct option long_options[] = {
62 {"version", no_argument, 0, 'v'},
63 {"help", no_argument, 0, 'h'},
64 {"port", required_argument, 0, 'p'},
65 {"wdir", required_argument, 0, 'w'},
66 {"debug", required_argument, 0, 'd'},
67 {"log-file", required_argument, 0, 'l'},
71 static struct server_data server_data;
73 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
75 static int server_stop_requested;
79 printf("psensor-server %s\n", VERSION);
80 printf(_("Copyright (C) %s jeanfi@gmail.com\n"
81 "License GPLv2: GNU GPL version 2 or later "
82 "<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>\n"
83 "This is free software: you are free to change and redistribute it.\n"
84 "There is NO WARRANTY, to the extent permitted by law.\n"),
90 printf(_("Usage: %s [OPTION]...\n"), program_name);
92 puts(_("psensor-server is an HTTP server for monitoring hardware "
93 "sensors remotely."));
97 puts(_(" -h, --help display this help and exit\n"
98 " -v, --version display version information and exit"));
101 puts(_(" -p,--port=PORT webserver port\n"
102 " -w,--wdir=DIR directory containing webserver pages"));
105 puts(_(" -d, --debug=LEVEL "
106 "set the debug level, integer between 0 and 3"));
107 puts(_(" -l, --log-file=PATH set the log file to PATH"));
110 printf(_("Report bugs to: %s\n"), PACKAGE_BUGREPORT);
112 printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
116 Returns the file path corresponding to a given URL
118 char *get_path(const char *url, const char *www_dir)
123 if (!strlen(url) || !strcmp(url, ".") || !strcmp(url, "/"))
128 res = malloc(strlen(www_dir)+strlen(p)+1);
130 strcpy(res, www_dir);
136 #if MHD_VERSION >= 0x00090200
138 file_reader(void *cls, uint64_t pos, char *buf, size_t max)
141 file_reader(void *cls, uint64_t pos, char *buf, int max)
146 fseek(file, pos, SEEK_SET);
147 return fread(buf, 1, max, file);
150 struct MHD_Response *
151 create_response_api(const char *nurl,
153 unsigned int *rp_code)
155 struct MHD_Response *resp;
159 if (!strcmp(nurl, URL_BASE_API_1_0_SENSORS)) {
160 page = sensors_to_json_string(server_data.sensors);
162 } else if (!strcmp(nurl, URL_API_1_0_SYSINFO)) {
163 page = sysinfo_to_json_string(&server_data.psysinfo);
164 } else if (!strcmp(nurl, URL_API_1_0_CPU_USAGE)) {
165 page = sensor_to_json_string(server_data.cpu_usage);
167 } else if (!strncmp(nurl, URL_BASE_API_1_0_SENSORS,
168 strlen(URL_BASE_API_1_0_SENSORS))
169 && nurl[strlen(URL_BASE_API_1_0_SENSORS)] == '/') {
171 const char *sid = nurl + strlen(URL_BASE_API_1_0_SENSORS) + 1;
173 s = psensor_list_get_by_id(server_data.sensors, sid);
176 page = sensor_to_json_string(s);
178 } else if (!strcmp(nurl, URL_API_1_0_SERVER_STOP)) {
180 server_stop_requested = 1;
181 page = strdup(HTML_STOP_REQUESTED);
185 *rp_code = MHD_HTTP_OK;
187 resp = MHD_create_response_from_data(strlen(page), page,
190 MHD_add_response_header(resp, MHD_HTTP_HEADER_CONTENT_TYPE,
199 struct MHD_Response *
200 create_response_file(const char *nurl,
202 unsigned int *rp_code,
209 ret = stat(fpath, &st);
211 if (!ret && (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) {
212 file = fopen(fpath, "rb");
215 *rp_code = MHD_HTTP_OK;
219 return MHD_create_response_from_data
220 (0, NULL, MHD_NO, MHD_NO);
223 return MHD_create_response_from_callback
228 (MHD_ContentReaderFreeCallback)&fclose);
231 log_err("Failed to open: %s.", fpath);
238 struct MHD_Response *
239 create_response(const char *nurl, const char *method, unsigned int *rp_code)
241 struct MHD_Response *resp = NULL;
243 if (!strncmp(nurl, URL_BASE_API_1_0, strlen(URL_BASE_API_1_0))) {
244 resp = create_response_api(nurl, method, rp_code);
246 char *fpath = get_path(nurl, server_data.www_dir);
248 resp = create_response_file(nurl, method, rp_code, fpath);
256 char *page = strdup(PAGE_NOT_FOUND);
257 *rp_code = MHD_HTTP_NOT_FOUND;
259 return MHD_create_response_from_data
260 (strlen(page), page, MHD_YES, MHD_NO);
265 cbk_http_request(void *cls,
266 struct MHD_Connection *connection,
270 const char *upload_data,
271 size_t *upload_data_size, void **ptr)
274 struct MHD_Response *response;
277 unsigned int resp_code;
279 if (strcmp(method, "GET"))
282 if (&dummy != *ptr) {
283 /* The first time only the headers are valid, do not
284 respond in the first round... */
289 if (*upload_data_size)
292 *ptr = NULL; /* clear context pointer */
294 log_debug(_("HTTP Request: %s"), url);
296 nurl = url_normalize(url);
298 pthread_mutex_lock(&mutex);
299 response = create_response(nurl, method, &resp_code);
300 pthread_mutex_unlock(&mutex);
302 ret = MHD_queue_response(connection, resp_code, response);
303 MHD_destroy_response(response);
310 int main(int argc, char *argv[])
312 struct MHD_Daemon *d;
313 int port = DEFAULT_PORT;
318 program_name = argv[0];
320 setlocale(LC_ALL, "");
323 bindtextdomain(PACKAGE, LOCALEDIR);
327 server_data.www_dir = NULL;
328 server_data.psysinfo.interfaces = NULL;
331 while ((optc = getopt_long(argc, argv,
332 "vhp:w:d:", long_options, NULL)) != -1) {
336 server_data.www_dir = strdup(optarg);
349 log_level = atoi(optarg);
351 _("Enables debug mode: %d"),
356 log_file = strdup(optarg);
364 if (!server_data.www_dir)
365 server_data.www_dir = strdup(DEFAULT_WWW_DIR);
368 log_file = strdup(DEFAULT_LOG_FILE);
370 if (!cmdok || optind != argc) {
371 fprintf(stderr, _("Try `%s --help' for more information.\n"),
380 server_data.sensors = get_all_sensors(0, 600);
383 server_data.cpu_usage = create_cpu_usage_sensor(600);
386 if (!*server_data.sensors)
387 log_err(_("No sensors detected."));
389 d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION,
391 NULL, NULL, &cbk_http_request, server_data.sensors,
394 log_err(_("Failed to create Web server."));
398 log_printf(LOG_INFO, _("Web server started on port: %d"), port);
399 log_printf(LOG_INFO, _("WWW directory: %s"), server_data.www_dir);
400 log_printf(LOG_INFO, _("URL: http://localhost:%d"), port);
402 while (!server_stop_requested) {
403 pthread_mutex_lock(&mutex);
406 sysinfo_update(&server_data.psysinfo);
407 cpu_usage_sensor_update(server_data.cpu_usage);
409 psensor_list_update_measures(server_data.sensors);
411 psensor_log_measures(server_data.sensors);
413 pthread_mutex_unlock(&mutex);
419 /* sanity cleanup for valgrind */
420 psensor_list_free(server_data.sensors);
422 psensor_free(server_data.cpu_usage);
424 free(server_data.www_dir);
432 if (log_file != DEFAULT_LOG_FILE)