2 * Copyright (C) 2010-2014 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
19 #define _LARGEFILE_SOURCE 1
24 #define _(str) gettext(str)
31 #include <sys/types.h>
32 #include <sys/select.h>
33 #include <sys/socket.h>
38 #include <microhttpd.h>
47 #include "psensor_json.h"
53 static const char *DEFAULT_LOG_FILE = "/var/log/psensor-server.log";
55 #define HTML_STOP_REQUESTED \
56 (_("<html><body><p>Server stop requested</p></body></html>"))
58 static const char *program_name;
60 static const int DEFAULT_PORT = 3131;
62 #define PAGE_NOT_FOUND (_("<html><body><p>"\
63 "Page not found - Go to <a href='/'>Main page</a></p></body>"))
65 static struct option long_options[] = {
66 {"version", no_argument, 0, 'v'},
67 {"help", no_argument, 0, 'h'},
68 {"port", required_argument, 0, 'p'},
69 {"wdir", required_argument, 0, 'w'},
70 {"debug", required_argument, 0, 'd'},
71 {"log-file", required_argument, 0, 'l'},
72 {"sensor-log-file", required_argument, 0, 0},
73 {"sensor-log-interval", required_argument, 0, 0},
77 static struct server_data server_data;
79 static pthread_mutex_t mutex;
81 static int server_stop_requested;
83 static void print_version()
85 printf("psensor-server %s\n", VERSION);
86 printf(_("Copyright (C) %s jeanfi@gmail.com\n"
87 "License GPLv2: GNU GPL version 2 or later "
88 "<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>\n"
89 "This is free software: you are free to change and redistribute it.\n"
90 "There is NO WARRANTY, to the extent permitted by law.\n"),
94 static void print_help()
96 printf(_("Usage: %s [OPTION]...\n"), program_name);
98 puts(_("psensor-server is an HTTP server for monitoring hardware "
99 "sensors remotely."));
103 puts(_(" -h, --help display this help and exit\n"
104 " -v, --version display version information and exit"));
107 puts(_(" -p,--port=PORT webserver port\n"
108 " -w,--wdir=DIR directory containing webserver pages"));
111 puts(_(" -d, --debug=LEVEL "
112 "set the debug level, integer between 0 and 3"));
113 puts(_(" -l, --log-file=PATH set the log file to PATH"));
114 puts(_(" --sensor-log-file=PATH set the sensor log file to PATH"));
115 puts(_(" --sensor-log-interval=S "
116 "set the sensor log interval to S (seconds)"));
119 printf(_("Report bugs to: %s\n"), PACKAGE_BUGREPORT);
121 printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
125 * Returns the file path corresponding to a given URL
127 static char *get_path(const char *url, const char *www_dir)
132 if (!strlen(url) || !strcmp(url, ".") || !strcmp(url, "/"))
137 res = malloc(strlen(www_dir)+strlen(p)+1);
139 strcpy(res, www_dir);
145 #if MHD_VERSION >= 0x00090200
147 file_reader(void *cls, uint64_t pos, char *buf, size_t max)
150 file_reader(void *cls, uint64_t pos, char *buf, int max)
155 fseeko(file, pos, SEEK_SET);
156 return fread(buf, 1, max, file);
159 static struct MHD_Response *
160 create_response_api(const char *nurl, const char *method, unsigned int *rp_code)
162 struct MHD_Response *resp;
166 if (!strcmp(nurl, URL_BASE_API_1_1_SENSORS)) {
167 page = sensors_to_json_string(server_data.sensors);
169 } else if (!strcmp(nurl, URL_API_1_1_SYSINFO)) {
170 page = sysinfo_to_json_string(&server_data.psysinfo);
171 } else if (!strcmp(nurl, URL_API_1_1_CPU_USAGE)) {
172 page = sensor_to_json_string(server_data.cpu_usage);
174 } else if (!strncmp(nurl, URL_BASE_API_1_1_SENSORS,
175 strlen(URL_BASE_API_1_1_SENSORS))
176 && nurl[strlen(URL_BASE_API_1_1_SENSORS)] == '/') {
178 const char *sid = nurl + strlen(URL_BASE_API_1_1_SENSORS) + 1;
180 s = psensor_list_get_by_id(server_data.sensors, sid);
183 page = sensor_to_json_string(s);
185 } else if (!strcmp(nurl, URL_API_1_1_SERVER_STOP)) {
187 server_stop_requested = 1;
188 page = strdup(HTML_STOP_REQUESTED);
192 *rp_code = MHD_HTTP_OK;
194 resp = MHD_create_response_from_data(strlen(page), page,
197 MHD_add_response_header(resp, MHD_HTTP_HEADER_CONTENT_TYPE,
206 static struct MHD_Response *create_response_file(const char *nurl,
208 unsigned int *rp_code,
215 ret = stat(fpath, &st);
217 if (!ret && (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) {
218 file = fopen(fpath, "rb");
221 *rp_code = MHD_HTTP_OK;
225 return MHD_create_response_from_data
226 (0, NULL, MHD_NO, MHD_NO);
229 return MHD_create_response_from_callback
234 (MHD_ContentReaderFreeCallback)&fclose);
237 log_err("Failed to open: %s.", fpath);
244 static struct MHD_Response *
245 create_response(const char *nurl, const char *method, unsigned int *rp_code)
247 struct MHD_Response *resp = NULL;
249 if (!strncmp(nurl, URL_BASE_API_1_1, strlen(URL_BASE_API_1_1))) {
250 resp = create_response_api(nurl, method, rp_code);
252 char *fpath = get_path(nurl, server_data.www_dir);
254 resp = create_response_file(nurl, method, rp_code, fpath);
262 char *page = strdup(PAGE_NOT_FOUND);
263 *rp_code = MHD_HTTP_NOT_FOUND;
265 return MHD_create_response_from_data(strlen(page),
271 static int cbk_http_request(void *cls,
272 struct MHD_Connection *connection,
276 const char *upload_data,
277 size_t *upload_data_size, void **ptr)
280 struct MHD_Response *response;
283 unsigned int resp_code;
285 if (strcmp(method, "GET"))
288 if (&dummy != *ptr) {
289 /* The first time only the headers are valid, do not
290 respond in the first round... */
295 if (*upload_data_size)
298 *ptr = NULL; /* clear context pointer */
300 log_debug(_("HTTP Request: %s"), url);
302 nurl = url_normalize(url);
305 response = create_response(nurl, method, &resp_code);
306 pmutex_unlock(&mutex);
308 ret = MHD_queue_response(connection, resp_code, response);
309 MHD_destroy_response(response);
316 int main(int argc, char *argv[])
318 struct MHD_Daemon *d;
319 int port, opti, optc, cmdok, ret, slog_interval;
320 char *log_file, *slog_file;
322 program_name = argv[0];
324 setlocale(LC_ALL, "");
327 bindtextdomain(PACKAGE, LOCALEDIR);
331 server_data.www_dir = NULL;
333 server_data.psysinfo.interfaces = NULL;
341 while ((optc = getopt_long(argc,
349 server_data.www_dir = strdup(optarg);
362 log_level = atoi(optarg);
363 log_info(_("Enables debug mode: %d"), log_level);
367 log_file = strdup(optarg);
370 if (!strcmp(long_options[opti].name, "sensor-log-file"))
371 slog_file = strdup(optarg);
372 else if (!strcmp(long_options[opti].name,
373 "sensor-log-interval"))
374 slog_interval = atoi(optarg);
382 if (!cmdok || optind != argc) {
383 fprintf(stderr, _("Try `%s --help' for more information.\n"),
388 if (!server_data.www_dir)
389 server_data.www_dir = strdup(DEFAULT_WWW_DIR);
392 log_file = strdup(DEFAULT_LOG_FILE);
400 server_data.sensors = get_all_sensors(0, 600);
401 lmsensor_psensor_list_append(&server_data.sensors, 600);
404 server_data.cpu_usage = create_cpu_usage_sensor(600);
407 if (!*server_data.sensors)
408 log_err(_("No sensors detected."));
410 d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION,
412 NULL, NULL, &cbk_http_request, server_data.sensors,
415 log_err(_("Failed to create Web server."));
419 log_info(_("Web server started on port: %d"), port);
420 log_info(_("WWW directory: %s"), server_data.www_dir);
421 log_info(_("URL: http://localhost:%d"), port);
424 if (slog_interval <= 0)
426 ret = slog_activate(slog_file,
431 log_err(_("Failed to activate logging of sensors."));
434 while (!server_stop_requested) {
438 sysinfo_update(&server_data.psysinfo);
439 cpu_usage_sensor_update(server_data.cpu_usage);
441 psensor_list_update_measures(server_data.sensors);
443 lmsensor_psensor_list_update(server_data.sensors);
445 psensor_log_measures(server_data.sensors);
447 pmutex_unlock(&mutex);
455 /* sanity cleanup for valgrind */
456 psensor_list_free(server_data.sensors);
458 psensor_free(server_data.cpu_usage);
460 free(server_data.www_dir);
467 if (log_file != DEFAULT_LOG_FILE)