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//
// Created by jhunk on 10/5/23.
//
#include <string.h>
#include <stdlib.h>
#include "download.h"
size_t download_writer(void *fp, size_t size, size_t nmemb, void *stream) {
size_t bytes = fwrite(fp, size, nmemb, (FILE *) stream);
return bytes;
}
long download(char *url, const char *filename, char **errmsg) {
extern char *VERSION;
CURL *c;
CURLcode curl_code;
long http_code = -1;
FILE *fp;
char user_agent[20];
sprintf(user_agent, "stasis/%s", VERSION);
long timeout = 30L;
char *timeout_str = getenv("STASIS_DOWNLOAD_TIMEOUT");
curl_global_init(CURL_GLOBAL_ALL);
c = curl_easy_init();
curl_easy_setopt(c, CURLOPT_URL, url);
curl_easy_setopt(c, CURLOPT_WRITEFUNCTION, download_writer);
fp = fopen(filename, "wb");
if (!fp) {
return -1;
}
curl_easy_setopt(c, CURLOPT_VERBOSE, 0L);
curl_easy_setopt(c, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(c, CURLOPT_USERAGENT, user_agent);
curl_easy_setopt(c, CURLOPT_NOPROGRESS, 0L);
curl_easy_setopt(c, CURLOPT_WRITEDATA, fp);
if (timeout_str) {
timeout = strtol(timeout_str, NULL, 10);
}
curl_easy_setopt(c, CURLOPT_CONNECTTIMEOUT, timeout);
curl_code = curl_easy_perform(c);
if (curl_code != CURLE_OK) {
if (errmsg) {
strcpy(*errmsg, curl_easy_strerror(curl_code));
} else {
fprintf(stderr, "\nCURL ERROR: %s\n", curl_easy_strerror(curl_code));
}
goto failed;
}
curl_easy_getinfo(c, CURLINFO_RESPONSE_CODE, &http_code);
failed:
fclose(fp);
curl_easy_cleanup(c);
curl_global_cleanup();
return http_code;
}
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