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#include <stdio.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <pthread.h>
#include <curl/curl.h>
#include <json.h>
#include "midtrans.h"
#define ORDER_ID "SANDBOX-G710367688-806"
static _Bool production = 0;
static char *base_url;
static CURL *curl;
static struct curl_slist *slist;
static pthread_t *threads;
static size_t num_threads = 0;
static size_t append(char *data, size_t size, size_t nmemb, char **json)
{
size_t realsize = size * nmemb;
size_t json_len = *json ? strlen(*json) : 0;
*json = realloc(*json, json_len + realsize + 1);
strlcpy(&(*json)[json_len], data, realsize + 1);
return realsize;
}
void midtrans_init(const char *api_key, const char *cainfo)
{
static const char *prefix = "SB-";
if (strncmp(api_key, prefix, strlen(prefix)))
production = 1;
static const char *url_tmpl = "https://api.%smidtrans.com/v2/";
static const char *infix = "sandbox.";
base_url = malloc(strlen(url_tmpl) - strlen ("%s")
+ !production * strlen(infix) + 1);
sprintf(base_url, url_tmpl, production ? "" : infix);
curl_global_init(CURL_GLOBAL_SSL);
curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, append);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
#ifdef DEBUG
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
#endif
static const char *basic_tmpl = "%s:";
const size_t basic_len = strlen(basic_tmpl) - strlen("%s")
+ strlen(api_key);
char basic[basic_len + 1];
sprintf(basic, basic_tmpl, api_key);
BIO *b64 = BIO_new(BIO_f_base64());
BIO *mem = BIO_new(BIO_s_mem());
BIO_push(b64, mem);
BIO_write(b64, basic, basic_len);
BIO_flush(b64);
char *pp;
long base64_len = BIO_get_mem_data(b64, &pp) - 1;
char base64[base64_len + 1];
strlcpy(base64, pp, base64_len + 1);
BIO_free_all(b64);
static const char *hdr_tmpl = "Authorization: Basic %s";
char auth[strlen(hdr_tmpl) - strlen("%s") + base64_len + 1];
sprintf(auth, hdr_tmpl, base64);
slist = curl_slist_append(NULL, auth);
slist = curl_slist_append(slist, "Accept: application/json");
slist = curl_slist_append(slist, "Content-Type: application/json");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
if (cainfo)
curl_easy_setopt(curl, CURLOPT_CAINFO, cainfo);
}
static void *request(void *arg)
{
char *json = NULL;
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &json);
curl_easy_perform(curl);
#ifdef DEBUG
printf("%s\n", json);
#endif
free(json);
return NULL;
}
void midtrans_status(const char *order_id)
{
static const char *tmpl = "%s%s/status";
char url[strlen(tmpl) - strlen("%s") * 2 + strlen(base_url)
+ (production ? strlen(order_id) : strlen(ORDER_ID)) + 1];
sprintf(url, tmpl, base_url, production ? order_id : ORDER_ID);
curl_easy_setopt(curl, CURLOPT_URL, url);
threads = realloc(threads, ++num_threads * sizeof(pthread_t));
pthread_create(&threads[num_threads - 1], NULL, request, NULL);
}
void midtrans_cleanup()
{
for (size_t i = 0; i < num_threads; i++)
pthread_join(threads[i], NULL);
free(base_url);
curl_slist_free_all(slist);
curl_easy_cleanup(curl);
curl_global_cleanup();
}
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