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)
32 #include <sys/types.h>
33 #include <sys/select.h>
34 #include <sys/socket.h>
39 #include <microhttpd.h>
49 #include "psensor_json.h"
55 static const char *DEFAULT_LOG_FILE = "/var/log/psensor-server.log";
57 #define HTML_STOP_REQUESTED \
58 (_("<html><body><p>Server stop requested</p></body></html>"))
60 static const char *program_name;
62 static const int DEFAULT_PORT = 3131;
64 #define PAGE_NOT_FOUND (_("<html><body><p>"\
65 "Page not found - Go to <a href='/'>Main page</a></p></body>"))
67 static struct option long_options[] = {
68 {"version", no_argument, NULL, 'v'},
69 {"help", no_argument, NULL, 'h'},
70 {"port", required_argument, NULL, 'p'},
71 {"wdir", required_argument, NULL, 'w'},
72 {"debug", required_argument, NULL, 'd'},
73 {"log-file", required_argument, NULL, 'l'},
74 {"sensor-log-file", required_argument, NULL, 0},
75 {"sensor-log-interval", required_argument, NULL, 0},
79 static struct server_data server_data;
81 static pthread_mutex_t mutex;
83 static int server_stop_requested;
85 static void print_version(void)
87 printf("psensor-server %s\n", VERSION);
88 printf(_("Copyright (C) %s jeanfi@gmail.com\n"
89 "License GPLv2: GNU GPL version 2 or later "
90 "<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>\n"
91 "This is free software: you are free to change and redistribute it.\n"
92 "There is NO WARRANTY, to the extent permitted by law.\n"),
96 static void print_help(void)
98 printf(_("Usage: %s [OPTION]...\n"), program_name);
100 puts(_("psensor-server is an HTTP server for monitoring hardware "
101 "sensors remotely."));
105 puts(_(" -h, --help display this help and exit\n"
106 " -v, --version display version information and exit"));
109 puts(_(" -p,--port=PORT webserver port\n"
110 " -w,--wdir=DIR directory containing webserver pages"));
113 puts(_(" -d, --debug=LEVEL "
114 "set the debug level, integer between 0 and 3"));
115 puts(_(" -l, --log-file=PATH set the log file to PATH"));
116 puts(_(" --sensor-log-file=PATH set the sensor log file to PATH"));
117 puts(_(" --sensor-log-interval=S "
118 "set the sensor log interval to S (seconds)"));
121 printf(_("Report bugs to: %s\n"), PACKAGE_BUGREPORT);
123 printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
127 * Returns the file path corresponding to a given URL
129 static char *get_path(const char *url, const char *www_dir)
134 if (!strlen(url) || !strcmp(url, ".") || !strcmp(url, "/"))
139 res = malloc(strlen(www_dir)+strlen(p)+1);
141 strcpy(res, www_dir);
147 #if MHD_VERSION >= 0x00090200
149 file_reader(void *cls, uint64_t pos, char *buf, size_t max)
152 file_reader(void *cls, uint64_t pos, char *buf, int max)
157 fseeko(file, pos, SEEK_SET);
158 return fread(buf, 1, max, file);
161 static struct MHD_Response *
162 create_response_api(const char *nurl, const char *method, unsigned int *rp_code)
164 struct MHD_Response *resp;
168 if (!strcmp(nurl, URL_BASE_API_1_1_SENSORS)) {
169 page = sensors_to_json_string(server_data.sensors);
171 } else if (!strcmp(nurl, URL_API_1_1_SYSINFO)) {
172 page = sysinfo_to_json_string(&server_data.psysinfo);
173 } else if (!strcmp(nurl, URL_API_1_1_CPU_USAGE)) {
174 page = sensor_to_json_string(server_data.cpu_usage);
176 } else if (!strncmp(nurl, URL_BASE_API_1_1_SENSORS,
177 strlen(URL_BASE_API_1_1_SENSORS))
178 && nurl[strlen(URL_BASE_API_1_1_SENSORS)] == '/') {
180 const char *sid = nurl + strlen(URL_BASE_API_1_1_SENSORS) + 1;
182 s = psensor_list_get_by_id(server_data.sensors, sid);
185 page = sensor_to_json_string(s);
187 } else if (!strcmp(nurl, URL_API_1_1_SERVER_STOP)) {
189 server_stop_requested = 1;
190 page = strdup(HTML_STOP_REQUESTED);
194 *rp_code = MHD_HTTP_OK;
196 resp = MHD_create_response_from_buffer(strlen(page),
198 MHD_RESPMEM_MUST_FREE);
200 MHD_add_response_header(resp, MHD_HTTP_HEADER_CONTENT_TYPE,
209 static struct MHD_Response *create_response_file(const char *nurl,
211 unsigned int *rp_code,
218 ret = stat(fpath, &st);
220 if (!ret && (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) {
221 file = fopen(fpath, "rb");
224 *rp_code = MHD_HTTP_OK;
228 return MHD_create_response_from_buffer
232 return MHD_create_response_from_callback
237 (MHD_ContentReaderFreeCallback)&fclose);
240 log_err("Failed to open: %s.", fpath);
247 static struct MHD_Response *
248 create_response(const char *nurl, const char *method, unsigned int *rp_code)
250 char *page, *fpath, *rpath;
251 struct MHD_Response *resp = NULL;
254 if (!strncmp(nurl, URL_BASE_API_1_1, strlen(URL_BASE_API_1_1))) {
255 resp = create_response_api(nurl, method, rp_code);
257 fpath = get_path(nurl, server_data.www_dir);
259 rpath = realpath(fpath, NULL);
261 n = strlen(server_data.www_dir);
262 if (!strncmp(server_data.www_dir, rpath, n))
263 resp = create_response_file(nurl,
276 page = strdup(PAGE_NOT_FOUND);
277 *rp_code = MHD_HTTP_NOT_FOUND;
279 return MHD_create_response_from_buffer(strlen(page),
281 MHD_RESPMEM_MUST_FREE);
284 static int cbk_http_request(void *cls,
285 struct MHD_Connection *connection,
289 const char *upload_data,
290 size_t *upload_data_size,
294 struct MHD_Response *response;
297 unsigned int resp_code;
299 if (strcmp(method, "GET"))
302 if (&dummy != *ptr) {
303 /* The first time only the headers are valid, do not
304 * respond in the first round...
310 if (*upload_data_size)
313 *ptr = NULL; /* clear context pointer */
315 log_debug(_("HTTP Request: %s"), url);
317 nurl = url_normalize(url);
320 response = create_response(nurl, method, &resp_code);
321 pmutex_unlock(&mutex);
323 ret = MHD_queue_response(connection, resp_code, response);
324 MHD_destroy_response(response);
331 int main(int argc, char *argv[])
333 struct MHD_Daemon *d;
334 int port, opti, optc, cmdok, ret, slog_interval;
335 char *log_file, *slog_file;
337 program_name = argv[0];
339 setlocale(LC_ALL, "");
342 bindtextdomain(PACKAGE, LOCALEDIR);
346 server_data.www_dir = NULL;
348 server_data.psysinfo.interfaces = NULL;
356 while ((optc = getopt_long(argc,
364 server_data.www_dir = realpath(optarg, NULL);
377 log_level = atoi(optarg);
378 log_info(_("Enables debug mode: %d"), log_level);
382 log_file = strdup(optarg);
385 if (!strcmp(long_options[opti].name, "sensor-log-file"))
386 slog_file = strdup(optarg);
387 else if (!strcmp(long_options[opti].name,
388 "sensor-log-interval"))
389 slog_interval = atoi(optarg);
397 if (!cmdok || optind != argc) {
398 fprintf(stderr, _("Try `%s --help' for more information.\n"),
403 if (!server_data.www_dir) {
404 server_data.www_dir = realpath(DEFAULT_WWW_DIR, NULL);
405 if (!server_data.www_dir) {
407 _("Webserver directory does not exist.\n"));
413 log_file = strdup(DEFAULT_LOG_FILE);
419 hddtemp_psensor_list_append(&server_data.sensors, 600);
421 lmsensor_psensor_list_append(&server_data.sensors, 600);
424 server_data.cpu_usage = create_cpu_usage_sensor(600);
427 if (!server_data.sensors || !*server_data.sensors)
428 log_err(_("No sensors detected."));
430 d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION,
432 NULL, NULL, &cbk_http_request, server_data.sensors,
435 log_err(_("Failed to create Web server."));
439 log_info(_("Web server started on port: %d"), port);
440 log_info(_("WWW directory: %s"), server_data.www_dir);
441 log_info(_("URL: http://localhost:%d"), port);
444 if (slog_interval <= 0)
446 ret = slog_activate(slog_file,
451 log_err(_("Failed to activate logging of sensors."));
454 while (!server_stop_requested) {
458 sysinfo_update(&server_data.psysinfo);
459 cpu_usage_sensor_update(server_data.cpu_usage);
463 atasmart_psensor_list_update(server_data.sensors);
466 hddtemp_psensor_list_update(server_data.sensors);
468 lmsensor_psensor_list_update(server_data.sensors);
470 psensor_log_measures(server_data.sensors);
472 pmutex_unlock(&mutex);
480 /* sanity cleanup for valgrind */
481 psensor_list_free(server_data.sensors);
483 psensor_free(server_data.cpu_usage);
485 free(server_data.www_dir);
492 if (log_file != DEFAULT_LOG_FILE)