update for last heroku

config.ru

@@ -24,6 +24,30 @@ $rootdir="site"
 $errorFile='site/404.html'
 $mailFile='site/mail_sent.html'
 
+
+module ::Rack
+    class TryStatic < Static
+        def initialize(app, options)
+            super
+            @try = ([''] + Array(options.delete(:try)) + [''])
+        end
+
+        def call(env)
+            @next = 0
+            while @next < @try.size && 404 == (resp = super(try_next(env)))[0] 
+                @next += 1
+            end
+            404 == resp[0] ? @app.call : resp
+        end
+
+        private
+        def try_next(env)
+            env.merge('PATH_INFO' => env['PATH_INFO'] + @try[@next])
+        end
+
+    end
+end
+
 class MyMain < Rack::TryStatic
     def call(env) 
         request = Rack::Request.new(env)
@@ -48,7 +72,7 @@ class MyMain < Rack::TryStatic
                 "Last-Modified"  => File.mtime($mailFile).httpdate,
                 "Content-Type"   => "text/html",
                 "Content-Length" => File.size($mailFile).to_s
-            }, File.read($mailFile)]
+            }, [File.read($mailFile)]]
         else
             super
         end