From 4f81e9399051cc90ccddeb69b785d7422a28a1ff Mon Sep 17 00:00:00 2001
From: Comment <tim@gray.(none)>
Date: Wed, 8 May 2013 22:59:04 +0100
Subject: initial commit

---
 httpexists-proxy.php | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100755 httpexists-proxy.php

(limited to 'httpexists-proxy.php')

diff --git a/httpexists-proxy.php b/httpexists-proxy.php
new file mode 100755
index 0000000..adc4df4
--- /dev/null
+++ b/httpexists-proxy.php
@@ -0,0 +1,20 @@
+<?php 
+// Rough proxy to help map.js check for photos.
+// Reason being that requests similar to http://www.tcd.ie/Maps/photos/small/100.jpg
+// were being redirected to http://www.tcd.ie/Maps/photos/small/200.jpg or similar.
+// Because the web server is set up to permenantly redirect 301 to files with a similar name.
+// JavaScript cannot check for redirects (30x) as they are completed before the JavaScript runs.
+// Hence maps.js always got a 200 OK response for redirected photos.
+if (!empty($_GET['httpexistsurl'])) {
+	if (file_exists(dirname($_SERVER['SCRIPT_FILENAME']).'/'.$_GET['httpexistsurl'])) {
+		// all good
+	}
+	else {
+		header("HTTP/1.0 404 Not Found");
+	}
+}
+else {
+	header("HTTP/1.0 404 Not Found");
+}
+
+?>
\ No newline at end of file
-- 
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