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Why jquery ajax not sending session cookie


I am getting logged out when I send request by ajax in a login session. I check headers sent by FireBug and show there was not cookie



Source: Tips4allCCNA FINAL EXAM

Comments

  1. AJAX calls only send Cookies if the url you're calling is on the same domain as your calling script.

    This may be a Cross Domain Problem.

    Maybe you tried to call a url from www.domain-a.com while your calling script was on www.domain-b.com (In other words: You made a Cross Domain Call in which case the browser won't sent any cookies to protect your privacy).

    In this case your options are:


    Write a small proxy which resides on domain-b and forwards your requests to domain-a. Your browser will allow you to call the proxy because it's on the same server as the calling script.This proxy then can be configured by you to accept a cookie name and value parameter which it can send to domain-a. But for this to work you need to know the cookie's name and value your server on domain-a wants for authentication.
    If you're fetching JSON objects try to use a JSONP request instead. jQuery supports these. But you need to alter your service on domain-a so that it returns valid JSONP responds.


    Glad if that helped even a little bit.

    ReplyDelete
  2. I am operating in cross-domain scenario. During login remote server is returning Set-Cookie header along with Allow-Access-Control-Credentials set to true.

    The next ajax call to remote server should use this cookie.

    CORS's Access-Control-Allow-Credentials is there to allow cross-domain logging. Check https://developer.mozilla.org/En/HTTP_access_control for examples.

    For me it seems like a bug in JQuery (or at least feature-to-be in next version).

    UPDATE:
    1) Cookies are not set automatically from AJAX response (citation: http://aleembawany.com/2006/11/14/anatomy-of-a-well-designed-ajax-login-experience/)

    Why?

    2) You cannot get value of the cookie from response to set it manually (http://www.w3.org/TR/XMLHttpRequest/#dom-xmlhttprequest-getresponseheader)

    I'm confused..

    There should exist a way to ask jquery.ajax() to set XMLHttpRequest.withCredentials = "true" parameter.

    ANSWER:
    You should use xhrFields param of http://api.jquery.com/jQuery.ajax/

    The example in the documentation is:

    $.ajax({
    url: a_cross_domain_url,
    xhrFields: {
    withCredentials: true
    }
    });

    ReplyDelete

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