Initial commit0.1.0

1 files changed, 100 insertions, 0 deletions

diff --git a/src/net.c b/src/net.c
new file mode 100644
index 0000000..f7dc481
--- /dev/null
+++ b/src/net.c
@@ -0,0 +1,100 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <curl/curl.h>
+#include <json.h>
+
+#include "net.h"
+#include "common.h"
+ 
+size_t memoryCallback(void* contents, size_t size, size_t nmemb, void* userp)
+{
+  size_t realsize = size * nmemb;
+  struct MemoryStruct* mem = (struct MemoryStruct*)userp;
+ 
+  uint8_t* ptr = realloc(mem->memory, mem->size + realsize + 1);
+  if(ptr == NULL) {
+    /* out of memory! */ 
+    puts("out of memory");
+    return 0;
+  }
+ 
+  mem->memory = ptr;
+  memcpy(&(mem->memory[mem->size]), contents, realsize);
+  mem->size += realsize;
+  mem->memory[mem->size] = 0;
+ 
+  return realsize;
+}
+
+struct MemoryStruct* downloadToRam(const char* URL)
+{
+    CURL* curl_handle;
+    CURLcode res;
+
+    struct MemoryStruct* chunk = malloc(sizeof(struct MemoryStruct));
+
+    chunk->memory = malloc(1);
+    chunk->size = 0;
+
+    curl_global_init(CURL_GLOBAL_ALL);
+
+    curl_handle = curl_easy_init();
+
+    curl_easy_setopt(curl_handle, CURLOPT_URL, URL);
+    curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, memoryCallback);
+    curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void*)chunk);
+    curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, USER_AGENT);
+    curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1L);
+
+    res = curl_easy_perform(curl_handle);
+
+    long http_code = 0;
+    curl_easy_getinfo (curl_handle, CURLINFO_RESPONSE_CODE, &http_code);
+
+    if(res != CURLE_OK) {
+        fprintf(stderr, "curl_easy_perform() failed: %s\n",
+        curl_easy_strerror(res));
+        return NULL;
+    }
+    else if (http_code != 200)
+    {
+        fprintf(stderr, "Server didn't respond as expected [HTTP Error %li]\n", http_code);
+        return NULL;
+    }
+
+    curl_easy_cleanup(curl_handle);
+    curl_global_cleanup();
+
+    return chunk;
+}
+
+int downloadFile(const char* URL, const char* path)
+{
+    struct MemoryStruct* chunk = downloadToRam(URL);
+
+    if (chunk)
+    {
+        FILE* file = fopen(path, "wb");
+        fwrite(chunk->memory, chunk->size, 1, file);
+        fclose(file);
+
+        free(chunk->memory);
+        free(chunk);
+    }
+
+    return 0;
+}
+
+struct json_object* fetchJSON(const char* URL)
+{
+    struct MemoryStruct* chunk = downloadToRam(URL);
+
+    struct json_object* json = json_tokener_parse((char*)chunk->memory);
+
+    free(chunk->memory);
+    free(chunk);
+
+    return json;
+}
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