Question

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Php – Debugging Curl

I am using curl to fetch the user data from youtube API
The code is

    $url_userInfo =  'https://gdata.youtube.com/feeds/api/users/default?access_token=ya29.AHES6ZS7GMdZf91LbMtoOdhFSFOpTuHHT-t7pSggAp-tS0A;

print_r($url_userInfo);
$ch = curl_init($url_userInfo);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, '3');
$content = curl_exec($ch);
curl_close($ch);
print_r( $content);

If I manually visit this url it displays the data in xml form. but there is nothing to print in $content.

Is there any problem with code??

Answer 1

That’s actually a HTTPS link, i.e. it uses SSL, and you need to get cacert.pem, and set up cURL for SSL to make that work.

You can get the certificate here!

and you would set it up like so:

$curl = curl_init();
$browser = $_SERVER['HTTP_USER_AGENT'];
$header[0] = "Accept: text/xml,application/xml,application/xhtml+xml,";
$header[0] .= "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
$header[] = "Cache-Control: max-age=0";
$header[] = "Connection: keep-alive";
$header[] = "Keep-Alive: 300";
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Language: en-us,en;q=0.5";
$header[] = "Pragma: ";
curl_setopt($curl, CURLOPT_FAILONERROR,true);
curl_setopt($curl, CURLOPT_USERAGENT, $browser);
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_REFERER, 'http://www.google.com');
curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
curl_setopt($curl, CURLOPT_AUTOREFERER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl, CURLOPT_TIMEOUT, 20);
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY); //needed for SSL
curl_setopt($curl, CURLOPT_CAINFO, "/scripts/cacert.pem"); //path to file
curl_setopt($curl, CURLOPT_URL, $url_userInfo);
$content = curl_exec($curl);
echo curl_error($curl);  //display errors under development
curl_close($ch);
print_r( $content );

Using a proper user agent, and authenticating with SSL and a certificate, just like the browser would.