More sensor information in struct; added handle_url; new node_id column in sendmysql

RaspberryPi/restcurl.c

@@ -1 +1,65 @@
- 
+#include "restcurl.h"
+#include <curl/curl.h>
+
+static struct url_data {
+    size_t size;
+    char* data;
+};
+
+static size_t write_data(void *ptr, size_t size, size_t nmemb, struct url_data *data) {
+    size_t index = data->size;
+    size_t n = (size * nmemb);
+    char* tmp;
+
+    data->size += (size * nmemb);
+
+    tmp = realloc(data->data, data->size + 1); /* +1 for '\0' */
+
+    if(tmp) {
+        data->data = tmp;
+    } else {
+        if(data->data) {
+            free(data->data);
+        }
+        fprintf(stderr, "Failed to allocate memory.\n");
+        return 0;
+    }
+
+    memcpy((data->data + index), ptr, n);
+    data->data[data->size] = '\0';
+
+    return size * nmemb;
+}
+
+char *handle_url(char *url) {
+    CURL *curl;
+
+    struct url_data data;
+    data.size = 0;
+    data.data = malloc(4096); /* reasonable size initial buffer */
+    if(NULL == data.data) {
+        fprintf(stderr, "Failed to allocate memory.\n");
+        return NULL;
+    }
+
+    data.data[0] = '\0';
+
+    CURLcode res;
+
+    curl = curl_easy_init();
+    if (curl) {
+        curl_easy_setopt(curl, CURLOPT_URL, url);
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &data);
+        res = curl_easy_perform(curl);
+        if(res != CURLE_OK) {
+                fprintf(stderr, "curl_easy_perform() failed: %s\n",  
+                        curl_easy_strerror(res));
+        }
+
+        curl_easy_cleanup(curl);
+
+    }
+    return data.data;
+}
+