/* * Copyright (C) 2010-2014 jeanfi@gmail.com * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA */ #define _LARGEFILE_SOURCE 1 #include "config.h" #include #include #define _(str) gettext(str) #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_GTOP #include "sysinfo.h" #include #endif #include #include #include #include "psensor_json.h" #include #include "url.h" #include "server.h" #include "slog.h" static const char *DEFAULT_LOG_FILE = "/var/log/psensor-server.log"; #define HTML_STOP_REQUESTED \ (_("

Server stop requested

")) static const char *program_name; static const int DEFAULT_PORT = 3131; #define PAGE_NOT_FOUND (_("

"\ "Page not found - Go to Main page

")) static struct option long_options[] = { {"version", no_argument, 0, 'v'}, {"help", no_argument, 0, 'h'}, {"port", required_argument, 0, 'p'}, {"wdir", required_argument, 0, 'w'}, {"debug", required_argument, 0, 'd'}, {"log-file", required_argument, 0, 'l'}, {"sensor-log-file", required_argument, 0, 0}, {"sensor-log-interval", required_argument, 0, 0}, {0, 0, 0, 0} }; static struct server_data server_data; static pthread_mutex_t mutex; static int server_stop_requested; static void print_version() { printf("psensor-server %s\n", VERSION); printf(_("Copyright (C) %s jeanfi@gmail.com\n" "License GPLv2: GNU GPL version 2 or later " "\n" "This is free software: you are free to change and redistribute it.\n" "There is NO WARRANTY, to the extent permitted by law.\n"), "2010-2012"); } static void print_help() { printf(_("Usage: %s [OPTION]...\n"), program_name); puts(_("psensor-server is an HTTP server for monitoring hardware " "sensors remotely.")); puts(""); puts("Options:"); puts(_(" -h, --help display this help and exit\n" " -v, --version display version information and exit")); puts(""); puts(_(" -p,--port=PORT webserver port\n" " -w,--wdir=DIR directory containing webserver pages")); puts(""); puts(_(" -d, --debug=LEVEL " "set the debug level, integer between 0 and 3")); puts(_(" -l, --log-file=PATH set the log file to PATH")); puts(_(" --sensor-log-file=PATH set the sensor log file to PATH")); puts(_(" --sensor-log-interval=S " "set the sensor log interval to S (seconds)")); puts(""); printf(_("Report bugs to: %s\n"), PACKAGE_BUGREPORT); puts(""); printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL); } /* * Returns the file path corresponding to a given URL */ static char *get_path(const char *url, const char *www_dir) { const char *p; char *res; if (!strlen(url) || !strcmp(url, ".") || !strcmp(url, "/")) p = "/index.html"; else p = url; res = malloc(strlen(www_dir)+strlen(p)+1); strcpy(res, www_dir); strcat(res, p); return res; } #if MHD_VERSION >= 0x00090200 static ssize_t file_reader(void *cls, uint64_t pos, char *buf, size_t max) #else static int file_reader(void *cls, uint64_t pos, char *buf, int max) #endif { FILE *file = cls; fseeko(file, pos, SEEK_SET); return fread(buf, 1, max, file); } static struct MHD_Response * create_response_api(const char *nurl, const char *method, unsigned int *rp_code) { struct MHD_Response *resp; struct psensor *s; char *page = NULL; if (!strcmp(nurl, URL_BASE_API_1_1_SENSORS)) { page = sensors_to_json_string(server_data.sensors); #ifdef HAVE_GTOP } else if (!strcmp(nurl, URL_API_1_1_SYSINFO)) { page = sysinfo_to_json_string(&server_data.psysinfo); } else if (!strcmp(nurl, URL_API_1_1_CPU_USAGE)) { page = sensor_to_json_string(server_data.cpu_usage); #endif } else if (!strncmp(nurl, URL_BASE_API_1_1_SENSORS, strlen(URL_BASE_API_1_1_SENSORS)) && nurl[strlen(URL_BASE_API_1_1_SENSORS)] == '/') { const char *sid = nurl + strlen(URL_BASE_API_1_1_SENSORS) + 1; s = psensor_list_get_by_id(server_data.sensors, sid); if (s) page = sensor_to_json_string(s); } else if (!strcmp(nurl, URL_API_1_1_SERVER_STOP)) { server_stop_requested = 1; page = strdup(HTML_STOP_REQUESTED); } if (page) { *rp_code = MHD_HTTP_OK; resp = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); MHD_add_response_header(resp, MHD_HTTP_HEADER_CONTENT_TYPE, "application/json"); return resp; } return NULL; } static struct MHD_Response *create_response_file(const char *nurl, const char *method, unsigned int *rp_code, const char *fpath) { struct stat st; int ret; FILE *file; ret = stat(fpath, &st); if (!ret && (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) { file = fopen(fpath, "rb"); if (file) { *rp_code = MHD_HTTP_OK; if (!st.st_size) { fclose(file); return MHD_create_response_from_buffer (0, NULL, 0); } return MHD_create_response_from_callback (st.st_size, 32 * 1024, &file_reader, file, (MHD_ContentReaderFreeCallback)&fclose); } else { log_err("Failed to open: %s.", fpath); } } return NULL; } static struct MHD_Response * create_response(const char *nurl, const char *method, unsigned int *rp_code) { char *page, *fpath, *rpath; struct MHD_Response *resp = NULL; int n; if (!strncmp(nurl, URL_BASE_API_1_1, strlen(URL_BASE_API_1_1))) { resp = create_response_api(nurl, method, rp_code); } else { fpath = get_path(nurl, server_data.www_dir); rpath = realpath(fpath, NULL); if (rpath) { n = strlen(server_data.www_dir); if (!strncmp(server_data.www_dir, rpath, n)) resp = create_response_file(nurl, method, rp_code, fpath); free(rpath); } free(fpath); } if (resp) return resp; page = strdup(PAGE_NOT_FOUND); *rp_code = MHD_HTTP_NOT_FOUND; return MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); } static int cbk_http_request(void *cls, struct MHD_Connection *connection, const char *url, const char *method, const char *version, const char *upload_data, size_t *upload_data_size, void **ptr) { static int dummy; struct MHD_Response *response; int ret; char *nurl; unsigned int resp_code; if (strcmp(method, "GET")) return MHD_NO; if (&dummy != *ptr) { /* The first time only the headers are valid, do not respond in the first round... */ *ptr = &dummy; return MHD_YES; } if (*upload_data_size) return MHD_NO; *ptr = NULL; /* clear context pointer */ log_debug(_("HTTP Request: %s"), url); nurl = url_normalize(url); pmutex_lock(&mutex); response = create_response(nurl, method, &resp_code); pmutex_unlock(&mutex); ret = MHD_queue_response(connection, resp_code, response); MHD_destroy_response(response); free(nurl); return ret; } int main(int argc, char *argv[]) { struct MHD_Daemon *d; int port, opti, optc, cmdok, ret, slog_interval; char *log_file, *slog_file; program_name = argv[0]; setlocale(LC_ALL, ""); #if ENABLE_NLS bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); #endif server_data.www_dir = NULL; #ifdef HAVE_GTOP server_data.psysinfo.interfaces = NULL; #endif log_file = NULL; slog_file = NULL; slog_interval = 300; port = DEFAULT_PORT; cmdok = 1; while ((optc = getopt_long(argc, argv, "vhp:w:d:l:", long_options, &opti)) != -1) { switch (optc) { case 'w': if (optarg) server_data.www_dir = realpath(optarg, NULL); break; case 'p': if (optarg) port = atoi(optarg); break; case 'h': print_help(); exit(EXIT_SUCCESS); case 'v': print_version(); exit(EXIT_SUCCESS); case 'd': log_level = atoi(optarg); log_info(_("Enables debug mode: %d"), log_level); break; case 'l': if (optarg) log_file = strdup(optarg); break; case 0: if (!strcmp(long_options[opti].name, "sensor-log-file")) slog_file = strdup(optarg); else if (!strcmp(long_options[opti].name, "sensor-log-interval")) slog_interval = atoi(optarg); break; default: cmdok = 0; break; } } if (!cmdok || optind != argc) { fprintf(stderr, _("Try `%s --help' for more information.\n"), program_name); exit(EXIT_FAILURE); } if (!server_data.www_dir) { server_data.www_dir = realpath(DEFAULT_WWW_DIR, NULL); if (!server_data.www_dir) { fprintf(stderr, _("Webserver directory does not exist.\n")); exit(EXIT_FAILURE); } } if (!log_file) log_file = strdup(DEFAULT_LOG_FILE); pmutex_init(&mutex); log_open(log_file); hddtemp_psensor_list_append(&server_data.sensors, 600); lmsensor_psensor_list_append(&server_data.sensors, 600); #ifdef HAVE_GTOP server_data.cpu_usage = create_cpu_usage_sensor(600); #endif if (!*server_data.sensors) log_err(_("No sensors detected.")); d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION, port, NULL, NULL, &cbk_http_request, server_data.sensors, MHD_OPTION_END); if (!d) { log_err(_("Failed to create Web server.")); exit(EXIT_FAILURE); } log_info(_("Web server started on port: %d"), port); log_info(_("WWW directory: %s"), server_data.www_dir); log_info(_("URL: http://localhost:%d"), port); if (slog_file) { if (slog_interval <= 0) slog_interval = 300; ret = slog_activate(slog_file, server_data.sensors, &mutex, slog_interval); if (!ret) log_err(_("Failed to activate logging of sensors.")); } while (!server_stop_requested) { pmutex_lock(&mutex); #ifdef HAVE_GTOP sysinfo_update(&server_data.psysinfo); cpu_usage_sensor_update(server_data.cpu_usage); #endif #ifdef HAVE_ATASMART atasmart_psensor_list_update(server_data.sensors); #endif hddtemp_psensor_list_update(server_data.sensors); lmsensor_psensor_list_update(server_data.sensors); psensor_log_measures(server_data.sensors); pmutex_unlock(&mutex); sleep(5); } slog_close(); MHD_stop_daemon(d); /* sanity cleanup for valgrind */ psensor_list_free(server_data.sensors); #ifdef HAVE_GTOP psensor_free(server_data.cpu_usage); #endif free(server_data.www_dir); sensors_cleanup(); #ifdef HAVE_GTOP sysinfo_cleanup(); #endif if (log_file != DEFAULT_LOG_FILE) free(log_file); return EXIT_SUCCESS; }