applet problem

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  • Nick Wedd
    #1

    applet problem

    Here is a test page
    404 Not Found
    http://www.maproom.org/maps/historical/droysens/1886/testj.html

    which uses a Java applet to take a .DjVu format file and display the
    image which it encodes. The page is simple html, you can view its
    source.

    When I started using this applet, it worked on my system with
    Mozila/Netscape, Mozilla/Firebird, Mozilla/Firefox, and Internet
    Explorer, all running on my WindowsXP system. I was warned that the
    applet worked with only some Mac browsers.

    However, now I find that on my system, I only see the image with
    Mozila/Netscape. With Mozilla/Firebird, Mozilla/Firefox, and Internet
    Explorer, the image does not appear. I am puzzled as to what has caused
    the change. My guess is that it has something to do with increased
    security settings - but I can't find where the actual change has
    happened, nor how to reverse it.

    Can anyone here advise?

    Nick
    --
    Nick Wedd nick@maproom.co .uk
    Tags: None
    • SPG
      #2
      Re: applet problem


      "Nick Wedd" <nick@maproom.c o.uk> wrote in message
      news:tMfAjnQ4cI EDFAjw@maproom. demon.co.uk...[color=blue]
      > Here is a test page
      > http://www.maproom.org/maps/historic...886/testj.html
      > which uses a Java applet to take a .DjVu format file and display the image
      > which it encodes. The page is simple html, you can view its source.
      >
      > When I started using this applet, it worked on my system with
      > Mozila/Netscape, Mozilla/Firebird, Mozilla/Firefox, and Internet Explorer,
      > all running on my WindowsXP system. I was warned that the applet worked
      > with only some Mac browsers.
      >
      > However, now I find that on my system, I only see the image with
      > Mozila/Netscape. With Mozilla/Firebird, Mozilla/Firefox, and Internet
      > Explorer, the image does not appear. I am puzzled as to what has caused
      > the change. My guess is that it has something to do with increased
      > security settings - but I can't find where the actual change has happened,
      > nor how to reverse it.
      >
      > Can anyone here advise?
      >
      > Nick
      > --
      > Nick Wedd nick@maproom.co .uk[/color]

      Your problem is that you are trying to download the image via the applet
      from a different server than the one the applet is locate.
      Applets may only ever open connections to the server they originate from for
      security reasons.

      Two options:

      1. Keep the image on your local server (with the applet), or even embed it
      in the jar file
      2. Sign your applet.

      HTH,

      Steve


        Comment

        • Nick Wedd
          #3
          Re: applet problem

          In message <1AhQe.97725$G8 .19382@text.new s.blueyonder.co .uk>, SPG
          <steve.goodsell @nopoo.blueyond er.co.uk> writes[color=blue]
          >
          >"Nick Wedd" <nick@maproom.c o.uk> wrote in message
          >news:tMfAjnQ4c IEDFAjw@maproom .demon.co.uk...[color=green]
          >> Here is a test page
          >> http://www.maproom.org/maps/historic...886/testj.html
          >> which uses a Java applet to take a .DjVu format file and display the image
          >> which it encodes. The page is simple html, you can view its source.
          >>
          >> When I started using this applet, it worked on my system with
          >> Mozila/Netscape, Mozilla/Firebird, Mozilla/Firefox, and Internet Explorer,
          >> all running on my WindowsXP system. I was warned that the applet worked
          >> with only some Mac browsers.
          >>
          >> However, now I find that on my system, I only see the image with
          >> Mozila/Netscape. With Mozilla/Firebird, Mozilla/Firefox, and Internet
          >> Explorer, the image does not appear. I am puzzled as to what has caused
          >> the change. My guess is that it has something to do with increased
          >> security settings - but I can't find where the actual change has happened,
          >> nor how to reverse it.
          >>
          >> Can anyone here advise?
          >>
          >> Nick
          >> --
          >> Nick Wedd nick@maproom.co .uk[/color]
          >
          >Your problem is that you are trying to download the image via the applet
          >from a different server than the one the applet is locate.
          >Applets may only ever open connections to the server they originate from for
          >security reasons.
          >
          >Two options:
          >
          >1. Keep the image on your local server (with the applet), or even embed it
          >in the jar file
          >2. Sign your applet.[/color]

          Thank you very much for your answer!

          The image and the applet are located on the same server, where the html
          also is:
          codebase="../../../../java"
          <param name="data" value='0000.djv u'>

          However, there was something located on a different server:
          <param name="image" value="http://javadjvu.source forge.net">
          This is not the image, it is just an html page. I was recommended to
          put this line there by someone connected with the applet, who said it
          would speed up the operation of the applet; he said its actual content
          was irrelevant. Anyway, I have now replaced this line by
          <param name="image" value="dummy.ht ml">
          where dummy.html is a page located on the same server.
          All my browsers have started displaying the image correctly.

          Nick
          --
          Nick Wedd nick@maproom.co .uk

            Comment

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