Pass query parameters around

redirect/web.config

@@ -5,9 +5,9 @@
             <rules>
                 <rule name="Redirect to localhost" stopProcessing="true">
                     <conditions>
-                        <add input="{QUERY_STRING}" pattern="state=([0-9]+)" />
+                        <add input="{QUERY_STRING}" pattern="state=([0-9]+)(,[^,&amp;]*,([^,&amp;]*))?" />
                     </conditions>
-                    <action type="Redirect" url="http://127.0.0.1:{C:1}/callback" redirectType="Found" />
+                    <action type="Redirect" url="http://127.0.0.1:{C:1}/callback?{UrlDecode:{C:3}}" redirectType="Found" />
                 </rule>
             </rules>
         </rewrite>