$.ajax + authentication + `@` in username

I am creating a web app which uses jQuery to authenticate:

$.ajax({
    url: "/session/create?format=json",
    type: "GET",
    dataType: "json",
    cache: false,
    username: $("#signin-email").val(),
    password: $("#signin-password").val(),
    success: function(data) {
      if(data.success) {
        success = true;
      }
    }
  });

The problem is that the code only makes the AJAX-request when the username does not include things like an @ (probably because the @ is a seperator for authentication and host in the URL), which is required in my app. Can anyone help me with how I can do this? I 开发者_运维百科do not mind changing the back-end a little bit, but requiring users to have an @-less email is not an option.

Oh, my back-end is a Ruby-on-Rails app.

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You should replace all @s with %40. The @ is namely teh seperator between the authentication and host in the URL (e.g. http://someone:password@example.com/

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Couldn't replicate described behavior: request is being sent for @-logins. Are you sure that this is not a server problem (e.g. response isn't in json format)? (Btw, I'm using standard jquery, suppose there are no hacks for one that RoR shipped with)