Would A Browser Ever Ignore Case Sensitivity Of The Location Header When Responding To A Redirect
Sep 3, 2010
If a browser requests http://site.com/?q=abc
and gets a 301 redirect response to location http://site.com/?q=ABC (note case of querystring)
Is it possible for the browser to ignore the difference in case and re-request http://site.com/?q=abc, thus causing an infinite redirect loop?That's the scenario that appears to be happening according to the IIS logs. It seems to be isolated to Internet Explorer with some variation of the Ask toolbar installed (based on user-agent values). I even installed the Ask toolbar, but have not been able to recreate this scenario in any way.
I can't post the source code, but for those that want something, here's the general logic:
Page_Load(object sender, EventArgs e)
{
var q = Request.QueryString["q"];[code]...
As you can see, if this page is requested with ?q=abc it will be redirected once, but then it'll render as usual because the redirect goes to ?q=ABC.Is there any scenario where the browser (specifically IE with the Ask toolbar) could ignore the case of the redirect location, causing an endless loop?
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[code]....
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using System;
namespace TestDupRequestCancellation
{
public partial class _Default : System.Web.UI.Page
{
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get
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set
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CurrentValue += 1;
}
}
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Is there anyway to leave the user with the page as it was, so they can just click a button?
Also; please note that this code is the simplest code I could come up with to demonstrate my problem. It's not meant to demonstrate how to check for dup requests.
EDIT: Another change that will allow me to achieve the same results would be to disable all my event handlers.
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Protected
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Object,
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