Why HttpResponse.AppendHeader does not apply if Redirect is used?

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  • newsgroup.poster@gmail.com
    #1

    Why HttpResponse.AppendHeader does not apply if Redirect is used?

    I need to set a custom http header before perform http redirection.

    I do

    response.Append Header("aCustom Header", "aCustomVal ue")
    response.Redire ct("anUrl")

    and my added header doesn't show up, it seems to be erased, if I
    remove the redirect, it does.

    Looking at Redirect documentation (http://msdn.microsoft.com/en-us/
    library/t9dwyts4.aspx) it doesn't explain why the behaviour is
    occuring.

    How can I workarround this issue?

    Am I forced to implement my own redirect?

    Thanks,

    Gauthier Segay
    Tags: None
    • Damien
      #2
      Re: Why HttpResponse.Ap pendHeader does not apply if Redirect is used?

      On Oct 8, 10:52 am, newsgroup.pos.. .@gmail.com wrote:
      I need to set a custom http header before perform http redirection.
      >
      I do
      >
      response.Append Header("aCustom Header", "aCustomVal ue")
      response.Redire ct("anUrl")
      >
      and my added header doesn't show up, it seems to be erased, if I
      remove the redirect, it does.
      >
      Looking at Redirect documentation (http://msdn.microsoft.com/en-us/
      library/t9dwyts4.aspx) it doesn't explain why the behaviour is
      occuring.
      >
      How can I workarround this issue?
      >
      Am I forced to implement my own redirect?
      >
      Thanks,
      >
      Gauthier Segay
      There is a clue in the documentation, under Exceptions:

      HttpException A redirection is attempted after the HTTP
      headers have been sent

      So I think you're going to have to set the RedirectLocatio n property
      and choose an appropriate status to send.

      Damien

        Comment

        • =?Utf-8?B?YnJ1Y2UgYmFya2Vy?=
          #3
          RE: Why HttpResponse.Ap pendHeader does not apply if Redirect is used?

          a Response.Redire ct clears all content. you will need to write your own
          redirect.

          -- bruce (sqlwork.com)


          "newsgroup.post er@gmail.com" wrote:
          I need to set a custom http header before perform http redirection.
          >
          I do
          >
          response.Append Header("aCustom Header", "aCustomVal ue")
          response.Redire ct("anUrl")
          >
          and my added header doesn't show up, it seems to be erased, if I
          remove the redirect, it does.
          >
          Looking at Redirect documentation (http://msdn.microsoft.com/en-us/
          library/t9dwyts4.aspx) it doesn't explain why the behaviour is
          occuring.
          >
          How can I workarround this issue?
          >
          Am I forced to implement my own redirect?
          >
          Thanks,
          >
          Gauthier Segay
          >

            Comment

            • newsgroup.poster@gmail.com
              #4
              Re: Why HttpResponse.Ap pendHeader does not apply if Redirect is used?

              Thanks to both for your replies, I've added a comment to the msdn
              library

              if anyone have pointers to some freely usable implementation of
              redirect that allows more flexibility, that would be of great use.

              In the mean time I've hacked something simpler for my limited usecase.

              On Oct 8, 4:25 pm, Damien <Damien_The_Unb elie...@hotmail .comwrote:
              On Oct 8, 10:52 am, newsgroup.pos.. .@gmail.com wrote:
              >
              >
              >
              I need to set a custom http header before perform http redirection.
              >
              I do
              >
              response.Append Header("aCustom Header", "aCustomVal ue")
              response.Redire ct("anUrl")
              >
              and my added header doesn't show up, it seems to be erased, if I
              remove the redirect, it does.
              >
              Looking at Redirect documentation (http://msdn.microsoft.com/en-us/
              library/t9dwyts4.aspx) it doesn't explain why the behaviour is
              occuring.
              >
              How can I workarround this issue?
              >
              Am I forced to implement my own redirect?
              >
              Thanks,
              >
              Gauthier Segay
              >
              There is a clue in the documentation, under Exceptions:
              >
              HttpException           A redirection is attempted after the HTTP
              headers have been sent
              >
              So I think you're going to have to set the RedirectLocatio n property
              and choose an appropriate status to send.
              >
              Damien

                Comment

                • George
                  #5
                  Re: Why HttpResponse.Ap pendHeader does not apply if Redirect is used?

                  To do redirect you need to do 4 lines of code.

                  Request.Status = "302 Moved Permanently";
                  Request.StatusC ode = 302;
                  Request.AddHead er("Location", sUrl);
                  rq.End();

                  George.

                  <newsgroup.post er@gmail.comwro te in message
                  news:40989aa6-217d-4152-a99e-ec8f435c3b5f@d1 g2000hsg.google groups.com...
                  Thanks to both for your replies, I've added a comment to the msdn
                  library

                  if anyone have pointers to some freely usable implementation of
                  redirect that allows more flexibility, that would be of great use.

                  In the mean time I've hacked something simpler for my limited usecase.

                  On Oct 8, 4:25 pm, Damien <Damien_The_Unb elie...@hotmail .comwrote:
                  On Oct 8, 10:52 am, newsgroup.pos.. .@gmail.com wrote:
                  >
                  >
                  >
                  I need to set a custom http header before perform http redirection.
                  >
                  I do
                  >
                  response.Append Header("aCustom Header", "aCustomVal ue")
                  response.Redire ct("anUrl")
                  >
                  and my added header doesn't show up, it seems to be erased, if I
                  remove the redirect, it does.
                  >
                  Looking at Redirect documentation (http://msdn.microsoft.com/en-us/
                  library/t9dwyts4.aspx) it doesn't explain why the behaviour is
                  occuring.
                  >
                  How can I workarround this issue?
                  >
                  Am I forced to implement my own redirect?
                  >
                  Thanks,
                  >
                  Gauthier Segay
                  >
                  There is a clue in the documentation, under Exceptions:
                  >
                  HttpException A redirection is attempted after the HTTP
                  headers have been sent
                  >
                  So I think you're going to have to set the RedirectLocatio n property
                  and choose an appropriate status to send.
                  >
                  Damien

                    Comment

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