Response.Redirect appends #_=_ at the end of the URL

Question

I am using Response.Redirect in my ASP.NEt to redirect to the same page but with a different query string. However, when the page redirects, for some reasons unknown, this hash #_=_ is being added to the page.

Here's the redirect code in C#:

Response.Redirect("~/signup/?type=facebookregistration");
 return;

What causes this?

Are you using any javascript library that manipulates the `window.location` object such as `Angular JS`? — Leo, Jul 14 '16 at 03:38
@Leo No. only jQuery. When I load the page regurally, it's ok, just when I redirect it happens. — Liron Harel, Jul 14 '16 at 03:40
are you using any third-party OAuth authentication scheme? Such as Facebook, LinkedIn, etc.? — Leo, Jul 14 '16 at 03:47
@IdanShechter `Response.Redirect` should not append `#_=_` by default. Could you able to replicate the issue in a brand new asp.net application with least amount of code? — Win, Jul 14 '16 at 03:51
There is a [similar question](http://stackoverflow.com/questions/7131909/facebook-callback-appends-to-return-url) with big count of answers and comments. — Anton Novik, Jan 12 '17 at 16:13

score 1 · Accepted Answer · answered Jul 14 '16 at 03:58

1

Authenticating with Facebook includes an optional url fragment...redirect_uri, when this fragment is left blank, then the empty fragment #_=_ is appended. They actually mention it in this post

https://developers.facebook.com/blog/post/552/

If this affects the behaviour of your application you can easily remove using javascript

answered Jul 14 '16 at 03:58

Leo

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First of all thanks for finding it. I put a data in the redirect_uri when I call the faceobok api. I don't understand why calling a redirection and reloading the page makes it appear. Maybe I just don't understand what Session redirect is :) – Liron Harel Jul 14 '16 at 04:02

Response.Redirect appends #_=_ at the end of the URL

1 Answers1