From 9340c5232c39a25108a7fb40337f9b722b411a6d Mon Sep 17 00:00:00 2001
From: Lars Jung <lrsjng@gmail.com>
Date: Thu, 11 Jul 2013 01:32:53 +0200
Subject: [PATCH] Adds a version and url check to not confuse multiple
 installations.

---
 src/_h5ai/server/php/inc/App.php | 13 ++++++++++++-
 src/_h5ai/server/php/index.php   |  9 +++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/_h5ai/server/php/inc/App.php b/src/_h5ai/server/php/inc/App.php
index fa5f372a..28cc07b4 100644
--- a/src/_h5ai/server/php/inc/App.php
+++ b/src/_h5ai/server/php/inc/App.php
@@ -27,6 +27,9 @@ class App {
 		$this->abs_path = $this->get_abs_path($this->abs_href);
 
 		$this->options = load_commented_json($this->app_abs_path . "/conf/options.json");
+
+		$this->is_https = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] === 443);
+		$this->prot_host = 'http' . ($this->is_https ? 's' : '') . '://' . getenv('HTTP_HOST');
 	}
 
 
@@ -146,7 +149,15 @@ class App {
 				return 200;
 			}
 		}
-		return App::$MAGIC_SEQUENCE;
+
+		try {
+			$res = json_decode(file_get_contents($this->prot_host . $abs_href . '?version'));
+			if ($res->version === '{{pkg.version}}' && $res->href === $this->app_abs_href) {
+				return App::$MAGIC_SEQUENCE;
+			}
+		} catch (Exception $e) {}
+
+		return 200;
 	}
 
 
diff --git a/src/_h5ai/server/php/index.php b/src/_h5ai/server/php/index.php
index fdbe6bc8..ace8971c 100644
--- a/src/_h5ai/server/php/index.php
+++ b/src/_h5ai/server/php/index.php
@@ -20,6 +20,15 @@ function normalized_require_once($lib) {
 }
 
 
+/* Fast exit on version check */
+
+if (array_key_exists("version", $_REQUEST)) {
+
+	echo json_encode(array("code" => 0, "version" => "{{pkg.version}}", "href" => APP_ABS_HREF));
+	exit;
+}
+
+
 /* Load Libs */
 
 normalized_require_once("/server/php/inc/util.php");