From 86fc72c68a94054e4b833d89507a49bf99561a2c Mon Sep 17 00:00:00 2001
From: erickoledadevrel <ekoleda+devrel@google.com>
Date: Tue, 9 Jun 2015 11:44:24 -0700
Subject: [PATCH] Fix bug with multiple HTTP headers in batch requests. Fixes
 #548.

---
 Src/GoogleApis/Apis/Requests/BatchRequest.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Src/GoogleApis/Apis/Requests/BatchRequest.cs b/Src/GoogleApis/Apis/Requests/BatchRequest.cs
index fa8c1c96db..6d602afdf0 100644
--- a/Src/GoogleApis/Apis/Requests/BatchRequest.cs
+++ b/Src/GoogleApis/Apis/Requests/BatchRequest.cs
@@ -254,8 +254,13 @@ internal static HttpResponseMessage ParseAsHttpResponse(string content)
                 while (!string.IsNullOrEmpty((line = reader.ReadLine())))
                 {
                     var separatorIndex = line.IndexOf(':');
-                    headersDic.Add(line.Substring(0, separatorIndex).Trim(),
-                        line.Substring(separatorIndex + 1).Trim());
+                    var key = line.Substring(0, separatorIndex).Trim();
+                    var value = line.Substring(separatorIndex + 1).Trim();
+                    if (headersDic.ContainsKey(key)) {
+                        headersDic[key] = headersDic[key] + ", " + value;
+                    } else {
+                        headersDic.Add(key, value);
+                    }
                 }
 
                 // Set the content.