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#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));
if (chunk)
{
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;
}
void 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);
}
}
struct json_object* fetchJSON(const char* URL)
{
struct MemoryStruct* chunk = downloadToRam(URL);
if (chunk)
{
struct json_object* json = json_tokener_parse((char*)chunk->memory);
free(chunk->memory);
free(chunk);
return json;
}
return NULL;
}
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