Libcurl throwing error when downloading ERROR : unknown error - c

Question

I am trying to test libcurl for my project, but when I want to download a test file I get error:
ERROR : Unknown error
but no reason why it happens,
my code:
#include <stdio.h>
#include <curl/curl.h>
int main(int argc, char **argv) {
CURL *curl;
FILE *fp;
char name[30] = {"Test"};
char link[100] = {"ipv4.download.thinkbroadband.com/5MB.zip"};
CURLcode error;
int result;
fp = fopen(name,"Wb");
curl = curl_easy_init();
curl_easy_setopt;(curl, CURLOPT_URL, argv[1] );
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
curl_easy_perform(curl);
result = curl_easy_perform(curl);
if (result = CURLE_OK)
printf("Sucessful download !");
else
printf("Could not download, ERROR : %s \n",curl_easy_strerror(error));
printf("%s",error);
fclose(fp);
curl_easy_cleanup(curl);
}

Answer 1

There's a bunch of errors in the code.
The argument to fopen should be a lower case "w".
You declare both error and result but should use only one.
There's a stray semicolon in the middle of this line: curl_easy_setopt;(curl, CURLOPT_URL, argv[1] );
Combined with what's already mentioned, this should work:
#include <stdio.h>
#include <curl/curl.h>
int main(int argc, char **argv) {
if(argc < 2) {
puts("URL not given");
return 1;
}
CURL *curl;
FILE *fp;
char name[30] = {"Test"};
char link[100] = {"ipv4.download.thinkbroadband.com/5MB.zip"};
CURLcode result;
fp = fopen(name,"w");
curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, argv[1] );
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
result = curl_easy_perform(curl);
if (result == CURLE_OK)
printf("Sucessful download !");
else
printf("Could not download, ERROR : %s \n",curl_easy_strerror(result));
fclose(fp);
curl_easy_cleanup(curl);
return 0;
}
Don't forget to pass the URL as an argument, since you're not actually using link and don't check argc. And I advise you to learn how to use a debugger.

Answer 2

Complete guess - but could it have something to do with your code calling curl_easy_perform(curl); two times instead of once?
This looks suspicious:
curl_easy_perform(curl);
result = curl_easy_perform(curl);
Shouldn't it just be:
result = curl_easy_perform(curl);
Also, shouldn't link have the http prefix on it?
char link[100] = {"http://ipv4.download.thinkbroadband.com/5MB.zip"};

Answer 3

Regarding to your code indentation there are braces missing at least in your else path. That means that the last printf is being executed regardless of the result value...
Does it work as expected if you add the braces like this? Of course together with the other suggestions as stated by selbie and Emanuel P...
if (result == CURLE_OK) {
printf("Sucessful download !");
} else {
printf("Could not download, ERROR : %s \n",curl_easy_strerror(error));
printf("%s",error);
}