CURLOPT_HEADER返回401

Question

I need to get the location header. From what I've read, this should be as simple as

curl_setopt($c, CURLOPT_HEADER, true);
curl_setopt($c, CURLOPT_FOLLOWLOCATION, false);

If I don't include those two options, the curl request works fine, but I'm not able to get the location header.

If I do include those two options, then I get a 401 error.

The Location that is being returned should be a URL that does require an additional login. What am I doing wrong?

If it makes a difference, I'm doing a PUT.

Update: Turns out I was looking too much at the trees and not enough at the forest. When generated the information needed for a response to this question I realized the issue was actually with the call prior to this call.

Before the PUT, I need to get a session token. Since I wasn't parsing out the headers when getting the session token, I was getting a blank session token which was resulting in the 401 for the PUT.

Answer 1

HTTP response headers are included to the result of curl_exec when you set CURLOPT_HEADER option. So if you want to get response headers you have to extract it from the result using substr() and curl_getinfo(CURLINFO_HEADER_SIZE).

Here is a sample:

$c = curl_init();
// setting options including CURLOPT_HEADER
// ...
$result = curl_exec($c);
$info = curl_getinfo($c);
curl_close($c);
// extracting headers from result:
$n = $info['header_size'];
$headers = rtrim(substr($result, 0, $n));
$content = substr($result, $n);