How to grab headers when cURLing a page

Question

I'm trying to curl a page (server.php) and send it three variables in a header ($webServiceId $hash and $timestamp), shown below. How can I grab the two variables out of the header in server.php so I can process them and send a response? I've tried googling and searching here, but I can't seem to find out how.

$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, 'server.php');
curl_setopt($ch, CURLOPT_HTTPGET, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: URL-Encoded-API-Key {$webServiceId},{$hash},{$timestamp}"));
$response = curl_exec($ch);
curl_close ($ch);
// dump response
print_r( $response );

If server.php echos the headers its recieved back through the response, the print_r of $response yields:

HTTP/1.1 200 OK Date: Thu, 02 Aug 2012 22:18:59 GMT Server: LiteSpeed Connection: close X-Powered-By: PHP/5.3.14 Allow: GET

the Authorization: URL-Encoded-API-Key is't in there. Could I be setting up the curl header wrong?

Answer 1

The function getallheaders() will return the complete request headers. If you call it from server.php you should be able to receive the custom headers sent with cURL.

http://php.net/manual/en/function.getallheaders.php

EDIT

By the way, you need quotes around server.php :

curl_setopt($ch, CURLOPT_URL, 'server.php');

EDIT 2

I tested it using 2 scripts:

client.php

$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, 'http://127.0.0.1/server.php');
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: URL-Encoded-API-Key 12,12113132,1330032113"));
$response = curl_exec($ch);
curl_close ($ch);

// dump response
var_dump( $response );

server.php

var_dump(getallheaders());

When calling client.php I get the following response:

array(3) {
  ["Host"]=>
  string(9) "127.0.0.1"
  ["Accept"]=>
  string(3) "*/*"
  ["Authorization"]=>
  string(42) "URL-Encoded-API-Key 12,12113132,1330032113"
}

My guess is your custom header is incorrectly formatted. Try using a simple header and see if it works:

curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: 123456"));

Answer 2

I've never used getallheaders() but the documentation says it reads the headers for the current request, which is not what you are doing.

The answer is here: Can PHP cURL retrieve response headers AND body in a single request?

After you get all the headers as a string, then explode it, just go through each with a strstr() or regex to get the values.

Answer 3

You're doing it wrong. "CURLOPT_HEADER" is just a bool to show request and response headers in the output. You need to be using "CURLOPT_HTTPHEADER", which expects an array of headers and is used to pass headers with the request.

Look at: http://www.php.net/manual/en/function.curl-setopt.php