Question

I try to get a page with curl from an IIS-Server which demands user authentication.

The curl_exec returns nothing, CURLOPT_RETURNTRANSFER is true. If CURLOPT_RETURNTRANSFER is false the curl_exec returns true.

What’s the problem? The page is neither after successfull nor after unsuccessful authentication empty.

$username = $_POST["acc"];
$password = $_POST["pw"];
$url = "https://secure.website.com/";

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERPWD, "$username:$password");
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FAILONERROR, true);
$page = curl_exec($ch);
echo "Error: " . print_r(curl_getinfo($ch)) . "<br>";
curl_close($ch);

echo "<br>Page:<br>" . $page  . "<br>---------------------------<br>";

The script output looks like this:

Array ( [url] => https://secure.website.com/
        [content_type] => text/html
        [http_code] => 302
        [header_size] => 435
        [request_size] => 137
        [filetime] => -1
        [ssl_verify_result] => 20
        [redirect_count] => 0
        [total_time] => 0.187
        [namelookup_time] => 0
        [connect_time] => 0
        [pretransfer_time] => 0.046
        [size_upload] => 0
        [size_download] => 0
        [speed_download] => 0
        [speed_upload] => 0
        [download_content_length] => 0
        [upload_content_length] => 0
        [starttransfer_time] => 0.187
        [redirect_time] => 0
        [certinfo] => Array ( ) )
        Error: 1

Page:

---------------------------

curl_error outputs no error. The “Error: 1” at the end of the curl_getinfo is kind of my only hint.
The script works on other websites.

Answer 1

Note the status code, which is a 302 Found, meaning that the page is issuing a redirect. Try:

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

This will make cURL follow the redirects for you, and should fix this issue.

(Error: 1 is irrelevant, that’s just because you’re doing echo print_r().)