From df6da837dca4d1f11c9c288f32d81c24b38345e5 Mon Sep 17 00:00:00 2001
From: logmanoriginal <logmanoriginal@users.noreply.github.com>
Date: Fri, 23 Mar 2018 21:23:27 +0100
Subject: [PATCH] [FacebookBridge] Return error if username starts with slash

Requesting a username with a leading slash would cause error 500
because the requested URI would contain two slashes in a row.

For example username "/test" would result in:
https://facebook.com//test

References #628
---
 bridges/FacebookBridge.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/bridges/FacebookBridge.php b/bridges/FacebookBridge.php
index 90f3d74c..b0b43249 100644
--- a/bridges/FacebookBridge.php
+++ b/bridges/FacebookBridge.php
@@ -127,7 +127,14 @@ class FacebookBridge extends BridgeAbstract {
 					'header' => 'Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE') . "\r\n"
 				)
 			);
+
 			$context = stream_context_create($http_options);
+
+			// First character cannot be a forward slash
+			if(strpos($this->getInput('u'), "/") === 0) {
+				returnClientError('Remove leading slash "/" from the username!');
+			}
+
 			if(!strpos($this->getInput('u'), "/")) {
 				$html = getSimpleHTMLDOM(self::URI . urlencode($this->getInput('u')) . '?_fb_noscript=1',
 				false,