--- /dev/null
+/*
+ Copyright (C) 2010-2011 wpitchoune@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
+*/
+
+#include <locale.h>
+#include <libintl.h>
+#define _(str) gettext(str)
+
+#include "plib/url.h"
+#include "server/server.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <curl/curl.h>
+#include <json/json.h>
+
+#include "rsensor.h"
+
+struct ucontent {
+ char *data;
+ size_t len;
+};
+
+static CURL *curl;
+
+size_t cbk_curl(void *buffer, size_t size, size_t nmemb, void *userp)
+{
+ size_t realsize = size * nmemb;
+ struct ucontent *mem = (struct ucontent *)userp;
+
+ mem->data = realloc(mem->data, mem->len + realsize + 1);
+
+ memcpy(&(mem->data[mem->len]), buffer, realsize);
+ mem->len += realsize;
+ mem->data[mem->len] = 0;
+
+ return realsize;
+}
+
+char *create_api_1_0_sensors_url(const char *base_url)
+{
+ char *nurl = url_normalize(base_url);
+ int n = strlen(nurl) + strlen(URL_BASE_API_1_0_SENSORS) + 1;
+ char *ret = malloc(n);
+
+ strcpy(ret, nurl);
+ strcat(ret, URL_BASE_API_1_0_SENSORS);
+
+ free(nurl);
+
+ return ret;
+}
+
+struct psensor *json_object_to_psensor(json_object * o,
+ const char *sensors_url,
+ int values_max_length)
+{
+ json_object *oid;
+ json_object *oname;
+ json_object *otype;
+ struct psensor *s;
+ char *eid;
+ char *url;
+
+ oid = json_object_object_get(o, "id");
+ oname = json_object_object_get(o, "name");
+ otype = json_object_object_get(o, "type");
+
+ eid = url_encode(json_object_get_string(oid));
+ url = malloc(strlen(sensors_url) + 1 + strlen(eid) + 1);
+ sprintf(url, "%s/%s", sensors_url, eid);
+
+ s = psensor_create(strdup(url),
+ strdup(json_object_get_string(oname)),
+ json_object_get_int(otype) | SENSOR_TYPE_REMOTE,
+ values_max_length);
+ s->url = url;
+
+ free(eid);
+
+ return s;
+}
+
+void rsensor_init()
+{
+ curl = curl_easy_init();
+}
+
+void rsensor_end()
+{
+ curl_easy_cleanup(curl);
+}
+
+json_object *get_json_object(const char *url)
+{
+
+ struct ucontent chunk;
+ json_object *obj = NULL;
+
+ if (!curl)
+ return NULL;
+
+ chunk.data = malloc(1);
+ chunk.len = 0;
+
+ curl_easy_setopt(curl, CURLOPT_URL, url);
+ curl_easy_setopt(curl, CURLOPT_VERBOSE, 0);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, cbk_curl);
+ curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
+
+ if (curl_easy_perform(curl) == CURLE_OK)
+ obj = json_tokener_parse(chunk.data);
+ else
+ fprintf(stderr, _("ERROR: Fail to connect to: %s\n"), url);
+
+ free(chunk.data);
+
+ return obj;
+}
+
+struct psensor **get_remote_sensors(const char *server_url,
+ int values_max_length)
+{
+ struct psensor **sensors = NULL;
+ char *url;
+ json_object *obj;
+
+ url = create_api_1_0_sensors_url(server_url);
+
+ obj = get_json_object(url);
+
+ if (obj && !is_error(obj)) {
+ int i;
+ int n = json_object_array_length(obj);
+ sensors = malloc((n + 1) * sizeof(struct psensor *));
+
+ for (i = 0; i < n; i++) {
+ struct psensor *s = json_object_to_psensor
+ (json_object_array_get_idx(obj, i),
+ url,
+ values_max_length);
+ sensors[i] = s;
+ }
+
+ sensors[n] = NULL;
+
+ json_object_put(obj);
+ } else {
+ fprintf(stderr, _("ERROR: Invalid content: %s\n"), url);
+ }
+
+ free(url);
+
+ if (!sensors) {
+ sensors = malloc(sizeof(struct psensor *));
+ *sensors = NULL;
+ }
+
+ return sensors;
+}
+
+void remote_psensor_update(struct psensor *s)
+{
+ json_object *obj = get_json_object(s->url);
+
+ if (obj && !is_error(obj)) {
+ json_object *om;
+
+ om = json_object_object_get(obj, "last_measure");
+
+ if (!is_error(obj)) {
+ json_object *ov, *ot;
+ struct timeval tv;
+
+ ov = json_object_object_get(om, "value");
+ ot = json_object_object_get(om, "time");
+
+ tv.tv_sec = json_object_get_int(ot);
+ tv.tv_usec = 0;
+
+ psensor_set_current_measure
+ (s, json_object_get_double(ov), tv);;
+ }
+
+ json_object_put(obj);
+ } else {
+ printf(_("ERROR: Invalid JSON: %s\n"), s->url);
+ }
+
+}
+
+void remote_psensor_list_update(struct psensor **sensors)
+{
+ struct psensor **cur = sensors;
+
+ while (*cur) {
+ struct psensor *s = *cur;
+
+ if (s->type & SENSOR_TYPE_REMOTE)
+ remote_psensor_update(s);
+
+ cur++;
+ }
+}
projects / psensor.git / blobdiff