Fix login page fragment handling after soft reload on Firefox (#353)

* Fix login page fragment handling after soft reload on Firefox.

* Add comments.

* Move changelog entry to correct place.

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>
Co-authored-by: Felix Fontein <felix@fontein.de>

CHANGELOG.md

@@ -8,6 +8,8 @@
 
 ## Changes since v5.0.0
 
+- [#353](https://github.com/pusher/oauth2_proxy/pull/353) Fix login page fragment handling after soft reload on Firefox (@ffdybuster)
+
 # v5.0.0
 
 ## Release Hightlights

templates.go

@@ -135,6 +135,12 @@ func getTemplates() *template.Template {
 			(function() {
 				var inputs = document.getElementsByName('rd');
 				for (var i = 0; i < inputs.length; i++) {
+					// Add hash, but make sure it is only added once
+					var idx = inputs[i].value.indexOf('#');
+					if (idx >= 0) {
+						// Remove existing hash from URL
+						inputs[i].value = inputs[i].value.substr(0, idx);
+					}
 					inputs[i].value += window.location.hash;
 				}
 			})();