split of logical parts into separate files

1 files changed, 57 insertions, 0 deletions

diff --git a/input_gadgets.c b/input_gadgets.c
new file mode 100644
index 0000000..35dc766
--- /dev/null
+++ b/input_gadgets.c
@@ -0,0 +1,57 @@
+#include <string.h>
+#include <stdlib.h>
+#include <curl/curl.h>
+
+struct MemoryStruct {
+  char *memory;
+  size_t size;
+};
+
+static size_t
+WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
+{
+  size_t realsize = size * nmemb;
+  struct MemoryStruct *mem = (struct MemoryStruct *)userp;
+ 
+  char *ptr = realloc(mem->memory, mem->size + realsize + 1);
+  if(ptr == NULL) {
+    /* out of memory! */ 
+    printf("not enough memory (realloc returned NULL)\n");
+    return 0;
+  }
+ 
+  mem->memory = ptr;
+  memcpy(&(mem->memory[mem->size]), contents, realsize);
+  mem->size += realsize;
+  mem->memory[mem->size] = 0;
+ 
+  return realsize;
+}
+
+int gadgets_retrieve_temperature() {
+  CURL *curl_handle;
+  CURLcode res;
+  struct MemoryStruct chunk;
+
+  chunk.memory = malloc(1);
+  chunk.size = 0;
+
+  curl_global_init(CURL_GLOBAL_ALL);
+
+  curl_handle = curl_easy_init();
+  if (!curl_handle) {
+    perror("Failed to init curl");
+    return -1;
+  }
+  curl_easy_setopt(curl_handle, CURLOPT_URL, "https://wetter.mb.fh-jena.de/station/datenbank/php_giese/online.php");
+  curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1L);
+  curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
+  curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
+  curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
+  res = curl_easy_perform(curl_handle);
+  if (res != CURLE_OK)
+    fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
+  curl_easy_cleanup(curl_handle);
+  printf("%lu bytes retrieved\n", (unsigned long)chunk.size);
+  return 0;
+}