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Re: java webstart problem

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  To: comp.lang.java.gui
Mark Thornton wrote:
> Rogan Dawes wrote:
>> Mark Thornton wrote:
>>
>> While we are talking about WebStart, I thought I'd mention a PHP 
>> utility that I wrote to allow those of us with cheap hosting plans to 
>> host WebStart-able applications easily.
>>

> How strange --- I've done one too! Mine is running on a little Synology 
> DS-101j NAS device. One catch is that this device doesn't support the 
> Apache mod_rewrite or the addHandler functionality and thus every 
> resource to be downloaded needs a little PHP stub, and thus all the URLs 
> end in .PHP (e.g. myapp.jar.php). This introduces a couple of further 
> issues:
> 
> 1. The first release of Java 6 doesn't then work with signed jar files. 
> It gives a security exception. Subsequent (and previous) releases don't 
> have this problem.

I have seen a problem with Java 6 where it throws SecurityExceptions if 
the signed .jar is empty. Is that what you are referring to?

> 2. Java 6 doesn't include pack.gz in the list of accepted encodings. 
> Apparently this is also tied to the extension rather than the context.
> 
> 3. Although the application then works, it never appears in the Java 
> control panel applet's list of applications. Nor does it offer to create 
> a shortcut or start menu entry.

You are probably missing something simple. You might like to compare the 
series of conversations between WebStart and your device, and between 
WebStart and a real download servlet using an intercepting proxy like 
WebScarab. You will probably see some missing headers or something.

> My PHP script processes any local URL's in JNLP files to append the 
> necessary .PHP extension, as well replacing $$ macros.
> 
> Anyway subject to the caveats above, I have now got it to work. Those 
> issues and others meant it was a lot harder and took longer than I 
> expected.

Neat.

> As far as I can see the big problem is there is no minimum standard of 
> what you can expect from a host in terms of what is permitted in 
> .htaccess files. My Synology device is very restrictive in this respect. 
> PHP also has a lot of 'optional' elements, so many useful functions may 
> simply be missing. One of the advantages of Java is that
> so much is guaranteed to be present. Not so with PHP.

Yes, you are absolutely right. The lack of consistency is a pity. I did 
tried not to use anything *too* sophisticated, but I guess you are 
running in a seriously resource constrained environment.

> Mark Thornton

Regards,

Rogan
P.S. Sorry for the late reply, I have been travelling without access to 
my news feed.

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java webstart problem "Bruintje Beer" <bruintje.beer@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
  Re: java webstart problem "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
    Re: java webstart problem "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
      Re: java webstart problem "tar" <tar@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
        Re: java webstart problem "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
        Re: java webstart problem "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
    Re: java webstart problem "Gunter Herrmann" <gunter.herrmann@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
      Re: java webstart problem "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
        Re: java webstart problem "Rogan Dawes" <rogan.dawes@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
          Re: java webstart problem "Mark Thornton" <mark.thornton@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
            Re: java webstart problem "Rogan Dawes" <rogan.dawes@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
              Re: java webstart problem "Mark Thornton" <mark.thornton@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
                Re: java webstart problem "Rogan Dawes" <rogan.dawes@THRWHITE.remove-dii-this> - 2011-04-27 15:41 +0000
                Re: java webstart problem "Mark Thornton" <mark.thornton@THRWHITE.remove-dii-this> - 2011-04-27 15:41 +0000
              Re: java webstart problem "Mark Thornton" <mark.thornton@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000
          Re: java webstart problem "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:40 +0000

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