Get http response codes

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  • Bart op de grote markt
    #1

    Get http response codes

    Hello

    I have a website in php in which I have some kind of portal to external
    links that come from a database. When a user clicks on a link,
    "link.php" is called, does some stuff (e.g. adds 1 to the visit-count
    of that certain page) and then forwards the user with a location-header
    to the asked page. Now my question: is it possible to get the
    response-code of that asked page? E.g. when code 404 is returned, I
    can put that in the database and then it's easy for me to know when a
    link is broken.

    Kind regards,

    Bart

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    • Sjoerd
      #2
      Re: Get http response codes


      Bart schreef op de grote markt:
      I have a website in php in which I have some kind of portal to external
      links that come from a database. When a user clicks on a link,
      "link.php" is called, does some stuff (e.g. adds 1 to the visit-count
      of that certain page) and then forwards the user with a location-header
      to the asked page. Now my question: is it possible to get the
      response-code of that asked page? E.g. when code 404 is returned, I
      can put that in the database and then it's easy for me to know when a
      link is broken.
      No. When you send a location header to the client, the client requests
      the page it is redirected to. Your PHP page only points to the new
      page, but is not involved in the retrieval of it. Therefore, it can not
      retrieve the headers or the page itself, and thus not the return code
      which is part of the headers.

        Comment

        • Michael Fesser
          #3
          Re: Get http response codes

          ..oO(Bart op de grote markt)
          >I have a website in php in which I have some kind of portal to external
          >links that come from a database. When a user clicks on a link,
          >"link.php" is called, does some stuff (e.g. adds 1 to the visit-count
          >of that certain page) and then forwards the user with a location-header
          >to the asked page. Now my question: is it possible to get the
          >response-code of that asked page? E.g. when code 404 is returned, I
          >can put that in the database and then it's easy for me to know when a
          >link is broken.
          No, because it's the browser that request the other page, not your
          script.

          But you could let your script perform such a check from time to time:
          Maybe every 10th click on that link (or if the last check was more than
          1 month ago) your script itself could send a request to the other site
          to check its state. If the check succeeds, store the result in your DB
          and send the redirect to the browser.

          Micha

            Comment

            • Bart op de grote markt
              #4
              Re: Get http response codes


              Michael Fesser schreef:

              But you could let your script perform such a check from time to time:
              Maybe every 10th click on that link (or if the last check was more than
              1 month ago) your script itself could send a request to the other site
              to check its state. If the check succeeds, store the result in your DB
              and send the redirect to the browser.
              >
              Micha
              Ok, thx, I'm already a lot wiser and maybe this is what I'm going to
              do. It's a nice suggestion.

              Bart

                Comment

                • rh
                  #5
                  Re: Get http response codes


                  "Bart op de grote markt" <bartwarnez@fre egates.bewrote in message
                  news:1162215727 .250479.229640@ i42g2000cwa.goo glegroups.com.. .
                  Hello
                  >
                  I have a website in php in which I have some kind of portal to external
                  links that come from a database. When a user clicks on a link,
                  "link.php" is called, does some stuff (e.g. adds 1 to the visit-count
                  of that certain page) and then forwards the user with a location-header
                  to the asked page. Now my question: is it possible to get the
                  response-code of that asked page? E.g. when code 404 is returned, I
                  can put that in the database and then it's easy for me to know when a
                  link is broken.
                  >
                  Kind regards,
                  >
                  Bart
                  >
                  Yes.

                  When link.php "does some stuff" have it send a HEAD request to the link
                  url.

                  If it comes back as "200 Ok" forward the user to the page, if it comes back
                  as "404 Not Found" or any other error response show the user an error page
                  on your site and log the error for that link.

                  If the response comes back with a 3** redirect, you could parse that url
                  and check it (possibly set up a loop to check multiple redirects), forward
                  the user, or just show an error if you don't want the links to redirect
                  your users.


                  Rich


                    Comment

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