From 3ddd32fe366db8c7547c788d9988e7c60a72a3a8 Mon Sep 17 00:00:00 2001
From: James Moger <james.moger@gitblit.com>
Date: Thu, 11 Sep 2014 10:59:54 -0400
Subject: [PATCH] Merged #176 "Preserve refs in commits, tree, and docs navbar links"

---
 src/main/java/com/gitblit/servlet/DownloadZipFilter.java |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/main/java/com/gitblit/servlet/DownloadZipFilter.java b/src/main/java/com/gitblit/servlet/DownloadZipFilter.java
index 0c7b3e5..42257a2 100644
--- a/src/main/java/com/gitblit/servlet/DownloadZipFilter.java
+++ b/src/main/java/com/gitblit/servlet/DownloadZipFilter.java
@@ -38,11 +38,14 @@
 	@Override
 	protected String extractRepositoryName(String url) {
 		int a = url.indexOf("r=");
-		String repository = url.substring(a + 2);
-		if (repository.indexOf('&') > -1) {
-			repository = repository.substring(0, repository.indexOf('&'));
+		if (a > -1) {
+			String repository = url.substring(a + 2);
+			if (repository.indexOf('&') > -1) {
+				repository = repository.substring(0, repository.indexOf('&'));
+			}
+			return repository;
 		}
-		return repository;
+		return null;
 	}
 
 	/**

--
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