normalize headers from a proxied request so that rack doesnt choke on…

… them
ncr · Feb 21, 2014 · 8b8601a · 8b8601a
1 parent 43daaea
commit 8b8601a
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/lib/rack/proxy.rb b/lib/rack/proxy.rb
@@ -24,6 +24,13 @@ def extract_http_request_headers(env)
         headers.merge!("X-Forwarded-For" =>  x_forwarded_for)
       end
 
+      def normalize_headers(headers)
+        mapped = headers.map do|k, v| 
+          [k, if v.is_a? Array then v.first else v end]
+        end
+        Hash[mapped]
+      end
+
       protected
 
       def reconstruct_header_name(name)
@@ -97,7 +104,7 @@ def perform_request(env)
         end
       end
 
-      headers = (target_response.respond_to?(:headers) && target_response.headers) || target_response.to_hash
+      headers = (target_response.respond_to?(:headers) && target_response.headers) || self.class.normalize_headers(target_response.to_hash)
       body    = target_response.body
       body    = [body] unless body.respond_to?(:each)