Utilities: Add createPostRedirectLink function.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1548 44740490-163a-0410-bde0-09ae8108e29a

lib/SimpleSAML/Utilities.php

@@ -1764,6 +1764,32 @@ class SimpleSAML_Utilities {
 		exit(0);
 	}
 
+	/**
+	 * Create a link which will POST data.
+	 *
+	 * @param string $destination  The destination URL.
+	 * @param array $post  The name-value pairs which will be posted to the destination.
+	 * @return string  An URL which can be accessed to post the data.
+	 */
+	public static function createPostRedirectLink($destination, $post) {
+		assert('is_string($destination)');
+		assert('is_array($post)');
+
+		$id = SimpleSAML_Utilities::generateID();
+		$postData = array(
+			'post' => $post,
+			'url' => $destination,
+		);
+
+		$session = SimpleSAML_Session::getInstance();
+		$session->setData('core_postdatalink', $id, $postData);
+
+		return SimpleSAML_Utilities::addURLParameter(
+			SimpleSAML_Module::getModuleURL('core/postredirect.php'),
+			array('RedirId' => $id)
+			);
+	}
+
 }
 
 ?>
\ No newline at end of file

modules/core/www/postredirect.php

+<?php
+
+/**
+ * This page provides a way to create a redirect to a POST request.
+ *
+ * @package simpleSAMLphp
+ * @version $Id$
+ */
+
+if (!array_key_exists('RedirId', $_REQUEST)) {
+	throw new SimpleSAML_Error_BadRequest('Missing RedirId parameter.');
+}
+
+$id = $_REQUEST['RedirId'];
+
+$session = SimpleSAML_Session::getInstance();
+$postData = $session->getData('core_postdatalink', $id);
+
+if ($postData === NULL) {
+	/* The post data is missing, probably because it timed out. */
+	throw new Exception('The POST data we should restore was lost.');
+}
+assert('is_array($postData)');
+assert('array_key_exists("url", $postData)');
+assert('array_key_exists("post", $postData)');
+
+$url = $postData['url'];
+$post = $postData['post'];
+
+SimpleSAML_Utilities::postRedirect($url, $post);
+
+?>
\ No newline at end of file