ASP.NET Redirect behind proxy fails, ASP 3.0 works

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  • Andy Todd

    ASP.NET Redirect behind proxy fails, ASP 3.0 works

    Hi

    We have just moved an ASP.NET application into the live environment which is
    as follows:

    Sun Proxy Server / Firewall
    Windows 2000 Server / IIS5

    The URL for the site maps to the Sun proxy box. This translates the request
    and maps it to the Win2K server which responds through the proxy. The Win2K
    box has no direct connection to the internet. AFAIK the Win2K box knows
    nothing about the "real" URL being requested.

    We have a problem when issuing a Response.Redire ct for a relative path from
    ASP.NET. The code looks like:

    Response.Redire ct("home.aspx", false);

    The redirect sends the URL from the Win2K box back to the client with a 302
    status - the client then requests home.aspx, but incorrectly using the URL of
    the Win2K server.

    For example:

    - HTTP Post: http://dev.dfes.gov.uk/progressfile/...ons/index.aspx
    - index.aspx issues a redirect to home.aspx
    - Browser recieves this as 302 and is given the URL

    - Request fails the URL SHOULD be


    /0215wideninghor izons/ is the Virtual directory on the Win2K box.

    We could code around this, but as a test I wrote an ASP 3.0 page and an
    ASP.NET page which both issue just one command;
    Response.Redire ct("home.aspx") ;

    When I run both of these the ASP 3 page succeeds and redirects to the
    correct URL. The ASP.NET page however fails. Also a test with
    FormsAuthentica tion.RedirectFr omLoginPage() fails, sending the user to the
    wrong URL.

    We could code around this, but it looks like either a bug in Redirecting in
    ASP.NET, or there's something I don't know about the config which could help.

    Any suggestions greatly appreciated.

    Thanks
    Andy

    --
    Senior Developer - 3T Productions Ltd
    MCP ASP.NET
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