Question

i have an issue with url lengths in iis7. If you go to:

http://www.somesite.com/myaccount/login.htm?ReturnUrl=aa2Fmyaccounta2FdefaultaaspxadnoaauserSuppliedIdentifierahttpa3Aa2Fa2Faaaaaaamaapenidacoma2Fadnoaareturnatoasigahandleaa7B633942228855348748a7Da7BaRINLQa3Da3Da7DadnoaareturnatoasigaxSa2FFPGusD7UvskGqfkJq4QtEYjc4fSVFoa2F3sXNwCBteGOBJ8mipo7yLsuSk2hEgLogbzn6SthYb0wY3pBQM1OQa3Da3Daopenidaassocahandleaa7BHMACaSHA256a7Da7B4b051c2ba7Da7ddufPa2BAa3Da3Da7Daopenidaclaimedaidahttpa3Aa2Fa2Faaaaaaaaaopbnidacoma2Faopenidaidentityahttpa3Aa2Fa2Faaaaaaaabcpenidacoma2Faopenidamodeaidaresaopenidansahttpa3Aa2Fa2Fspec

The page will load fine but if you add one more character to the end it will throw an error. This might seem abit picky to you but it s stopping me from using open id on my login form since it returns a long url. One option i did consider was changing the requestFiltering, therefore in my web.config i have the following:

<system.webServer>
    <security>
        <requestFiltering>
            <requestLimits maxQueryString="999999999" maxUrl="999999999" />
        </requestFiltering>
    </security>
</system.webServer>

But this did not resolve the issue. I d appreciate it if someone could help. Thanks

Answer 1

This is a limitation of Windows and there is currently no workaround

See this StackOverflow article for more information:

ASP.NET url MAX_PATH limit

Answer 2

nfplee - Are you using Ionics Isapi Rewrite Filter (IIRF) by any chance? I just ran into the same issue where long urls always returns a 404.

If I disable IIRF everything works fine.

Answer 3

You may do something in web.config as follows.

<system.web>
  <httpRuntime maxUrlLength="4000"/>
</system.web>

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