Hi Dan,

Le jeudi 10 février 2005 à 09:02 -0800, dsmall0@fast... a écrit :
> On Thu, 10 Feb 2005 12:00:25 +0100, "Erik Bruchez" <ebruchez@orbe...>
> said:
> > Eric van der Vlist wrote:
> >
> > >      1. That would be nice if the URL generator could rely on the media
> > >         type given by the OS for local files. For instance, if I read
> > >         a .swx file and that my OS is configured correctly, the URL
> > >         generator could guess that the media type is
> > >         "application/vnd.sun.xml.writer".
> >
> > Is there a standard mechanism in Java to get the media type of a file
> > from the OS? With URLConnection, you can get information based on the
> > content-type header if there is one, or based on content (fairly poorly
> > implemented in the JDK last time I checked).
>
> Not in JDK 1.4.  Haven't looked in JDK 1.5.
>
> In any case implementing it is a total mess.   For example on
> Linux I can specify the type associated with a file extension
> via
> o /etc/magic
> o KDE's desktop settings
> o GNOME desktop settings
> o XPDE desktop settings
> o ....
>
> So what gets used will depend how I log in.  

Yes, media types are an incredibly simple idea which implementation is
incredibly broken :-( ...
>
> And wrt /etc/magic, it isn't standard.  That is that while it's
> described in POSIX.2 it, in practice the format of the file,
> the command lines to work with it, and the output from the tools
> that do work with it, all vary from *NIX platform to platform.
>
> So getting the type from the OS when writing Java isn't a
> good proposition.  
>
> On the other hand, perhaps there something that can be done
> in JavaScript.  That is if what one wants to do is meet
> the browser user's expectation wrt to file type then perhaps
> JavaScript could be used to achieve this....  

Yes, but that's not the case here: I'd just like that the URL generator
be able to guess the type from the filename, all that server side!

I think that having a presentation server global media-type.xml property
file and a class to exploit it would help a lot and would provide
consistency over the different processors.

Eric

> -- Regards, Dan S
>
>
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--
Did you know it? Python has now a Relax NG (partial) implementation.
                                          http://advogato.org/proj/xvif/
------------------------------------------------------------------------
Eric van der Vlist       http://xmlfr.org            http://dyomedea.com
(ISO) RELAX NG   ISBN:0-596-00421-4 http://oreilly.com/catalog/relax
(W3C) XML Schema ISBN:0-596-00252-1 http://oreilly.com/catalog/xmlschema
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