1 files changed, 128 insertions, 0 deletions
diff --git a/src/net.c b/src/net.c
new file mode 100644
index 0000000..0ae8e23
--- /dev/null
+++ b/src/net.c
@@ -0,0 +1,128 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <curl/curl.h>
+#include <json.h>
+
+#include "net.h"
+#include "fs.h"
+
+#define USER_AGENT NAME "/" VERSION
+
+void net_init()
+{
+    curl_global_init(CURL_GLOBAL_ALL);
+}
+
+void net_deinit()
+{
+    curl_global_cleanup();
+}
+
+static inline size_t memoryCallback(const 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)
+        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 = CURLE_OK;
+
+    struct MemoryStruct* chunk = malloc(sizeof(struct MemoryStruct));
+
+    if (chunk)
+    {
+        chunk->memory = malloc(1);
+        if (!chunk->memory)
+        {
+            free(chunk);
+            return NULL;
+        }
+        chunk->memory[0] = 0;
+        chunk->size = 0;
+
+        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);
+        curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 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 || http_code != 200)
+        {
+            freeDownload(chunk);
+            chunk = NULL;
+        }
+
+        curl_easy_cleanup(curl_handle);
+    }
+
+    return chunk;
+}
+
+size_t downloadToFile(const char* url, const char* path)
+{
+    size_t out_write = 0;
+    struct MemoryStruct* chunk = downloadToRam(url);
+
+    if (chunk)
+    {
+        FILE* fp = fopen(path, "wb");
+
+        if (fp)
+        {
+            out_write = fwrite(chunk->memory, sizeof(uint8_t), chunk->size, fp);
+            fclose(fp);
+        }
+
+        freeDownload(chunk);
+    }
+
+    return out_write;
+}
+
+void freeDownload(struct MemoryStruct* chunk)
+{
+    if (chunk)
+    {
+        if (chunk->memory)
+            free(chunk->memory);
+        free(chunk);
+    }
+}
+
+struct json_object* fetchJSON(const char* url)
+{
+    struct json_object* json = NULL;
+    struct MemoryStruct* chunk = downloadToRam(url);
+
+    if (chunk)
+    {
+        json = json_tokener_parse((char*)chunk->memory);
+        freeDownload(chunk);
+    }
+
+    return json;
+}