Using Curl for downloading.

[ltc]

Hello,

I'm using Curl 7.47.1 for downloading some files from internet. But I'm facing a trouble and I do not know how to fix it.
Please kindly help me to take a look my trouble as below.

I'd like to download a file at http://www.foxitsoftware.com/downloads/latest.php?product=Foxit-Reader&platform=Windows.
To do it, I set some following options:

char *url = http://www.foxitsoftware.com/downloads/latest.php?product=Foxit-Reader&platform=Windows;
pFile = fopen(outfilename,

"wb");
m_curl = curl_easy_init();

curl_easy_setopt(m_curl, CURLOPT_URL, url);

curl_easy_setopt(m_curl, CURLOPT_FOLLOWLOCATION, 1);

curl_easy_setopt(m_curl, CURLOPT_WRITEFUNCTION, write_data);

curl_easy_setopt(m_curl, CURLOPT_WRITEDATA, pFile);

curl_easy_setopt(m_curl, CURLOPT_HEADER, 0L);

CURLcode res = curl_easy_perform(m_curl);

However, it always returns CURLE_UNSUPPORTED_PROTOCOL after calling curl_easy_perform method.

Could you please let me know where my mistake in my source code?

Thanks,

[xismn]

Make our lives easier and use code tags.
You can configure curl to be a bit more verbose with errors. Try something like this and see what it says:

#include <iostream>
#include <string>
/**/

int main() {
	curl_global_init(CURL_GLOBAL_ALL);
	CURL* handle = curl_easy_init();
	CURLcode code;

	std::string string_error = "";
	std::string string_url = /**/;

	char error_buffer[CURL_ERROR_SIZE] = {};

	curl_easy_setopt(handle, CURLOPT_ERRORBUFFER, error_buffer);
	/*...*/
	curl_easy_setopt(handle, CURLOPT_URL, string_url.c_str());

	code = curl_easy_perform(handle);
	curl_easy_cleanup(handle);

	string_error = error_buffer;
	std::cout << string_error << std::endl;

	curl_global_cleanup();
	return 0;
}

[ltc]

Hi Xismn,
Thanks for your support.
I got error message "Protocol "https" not supported or disabled in libcurl". I check all of Options in libcurl but not found that method.

Could you please tell me how to enable it?
many thanks

[Peter87]

The URL that you are trying to download redirects to another URL that uses the HTTPS protocol.

https://curl.haxx.se/docs/faq.html#Protocol_xxx_not_supported_or_di
https://curl.haxx.se/docs/faq.html#curl_1_SSL_is_disabled_https

[ltc]

Thanks for your help. I fixed it.