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I have the same problem as described in this post: "First external login attempt redirects back to login action, second one works"

For him it works at second try but for me it's not working at all, he mentioned in his post that he found the reason but I don't understand how he solved it, I searched a lot with no hope :(

If I create a standalone MVC project with Owin membership everything will work as expected, but when I put it in an existing MVC project it redirects to login page each time I tried to login with external provider basically the Form Authentication causes the issue but how to force the Owin method to pass the Authorization, I added [AllowAnonymous] but didn't solve it.

For Facebook and Google there is a js solution to open the login using there api but for Twitter I didn't find a way to open the login page using Twitter js api, so for this reason I need to get Owin to work since I need the user to login using his Twitter account.

Please Advise

Community
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Fadl Assaad
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1 Answers1

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You should use HttpContext.Response.SuppressFormsAuthenticationRedirect = true;

when you call HttpContext.GetOwinContext().Authentication.Challenge

Nicolas Viard
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