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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <curl/curl.h>
#include <json-c/json.h>
#include "net.h"
#include "fs.h"
// official servers only whitelist some UAs
#define USER_AGENT "murse/0.1 (" NAME "/" VERSION ")"
void net_init(void)
{
curl_global_init(CURL_GLOBAL_ALL);
}
void net_deinit(void)
{
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 = NULL;
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;
}
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