Added HTTPResponse::getHeader(), to aid test verification

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@40911 467b73ca-7a2a-4603-9d3b-597d59a354a9

core/control/HTTPResponse.php

@@ -61,10 +61,21 @@ class HTTPResponse extends Object {
 		return $this->body;
 	}
 	
+	/**
+	 * Add a HTTP header to the response, replacing any header of the same name
+	 */
 	function addHeader($header, $value) {
 		$this->headers[$header] = $value;
 	}
 	
+	/**
+	 * Return the HTTP header of the given name
+	 * @returns string
+	 */
+	function getHeader($header) {
+		return $this->headers[$header];
+	}
+	
 	function redirect($dest) {
 		$this->statusCode = 302;
 		$this->headers['Location'] = $dest;