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Posted to dev@hc.apache.org by Chris Brown <ch...@hotmail.com> on 2004/10/22 10:18:12 UTC
Auto-detecting proxy settings in a standalone Java app
Hello,
I would like to perform a simple request against a HTTP server in an
application that will be deployed to customers with a wide variety of
network configurations. The application won't be deployed as an applet or
within Java Webstart, but will require JDK 1.4.2+ as the platform. The
target audience are all Windows users.
I've searched the HTTPClient archives and also the forums on Sun's Java
Developer site. The only useful links were:
http://forum.java.sun.com/thread.jsp?forum=30&thread=364342
http://www.mail-archive.com/commons-httpclient-dev@jakarta.apache.org/msg05349.html
I get the following error when trying this out:
java.io.IOException: Proxy service provider is not yet set
at com.sun.java.browser.net.ProxyService.getProxyInfo(ProxyService.java:40)
...so I assume this only works within Webstart or an applet.
Is there any way I can *automatically* retrieve the user's browser settings,
even if requires using JNI or JNIWrapper for example ? At least the proxy
host and port, even better if it can automatically enable login (or even
provide me with enough info to use the NTLM features of HTTPClient, if
required by the customer's environment).
Manual proxy configuration generates *way* more support costs at present
than anything else in the project. It's annoying to be disadvantaged in
this way, when most native Windows applications "just work"...
Thanks in advance,
Chris Brown
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Re: Auto-detecting proxy settings in a standalone Java app
Posted by Oleg Kalnichevski <ol...@bearingpoint.com>.
And how often does that happen in a course of one working day? I'd say
not that often. I do agree with Roland that a startup script written in
VBScript appears to be the best solution for the problem
Oleg
On Fri, 2004-10-22 at 10:54, Ortwin Glück wrote:
> Roland Weber wrote:
> > Wait, here is another idea: you could write a startup script that does
> > the proxy settings lookup, then passes the settings through -D
> > definitions as system properties, which can be accessed by your
> > Java application. That's a bit less ugly than calling native code
> > from within the app. The proxy settings for the HttpURLConnection
> > of the JDK are expected as system properties, too.
>
> Of course that implies you need to restart your app, everytime the proxy
> settings change...
>
> Odi
>
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Re: Auto-detecting proxy settings in a standalone Java app
Posted by Ortwin Glück <or...@nose.ch>.
Roland Weber wrote:
> Wait, here is another idea: you could write a startup script that does
> the proxy settings lookup, then passes the settings through -D
> definitions as system properties, which can be accessed by your
> Java application. That's a bit less ugly than calling native code
> from within the app. The proxy settings for the HttpURLConnection
> of the JDK are expected as system properties, too.
Of course that implies you need to restart your app, everytime the proxy
settings change...
Odi
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Re: Auto-detecting proxy settings in a standalone Java app
Posted by Roland Weber <RO...@de.ibm.com>.
Hello Chris,
native Windows applications "just work" because they access native
Windows APIs to read the proxy settings, which are probably stored
somewhere in the Windows registry. Browsers and the Java Plugin
for browsers are native Windows applications, and therefore can do
just that.
The only solution I can imagine right now is for you to write JNI code
that looks up the appropriate keys in the registry. Which means you'll
have to distribute a DLL along with the Java application.
Wait, here is another idea: you could write a startup script that does
the proxy settings lookup, then passes the settings through -D
definitions as system properties, which can be accessed by your
Java application. That's a bit less ugly than calling native code
from within the app. The proxy settings for the HttpURLConnection
of the JDK are expected as system properties, too.
hope that helps,
Roland
"Chris Brown" <ch...@hotmail.com>
22.10.2004 10:18
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Subject
Auto-detecting proxy settings in a standalone Java app
Hello,
I would like to perform a simple request against a HTTP server in an
application that will be deployed to customers with a wide variety of
network configurations. The application won't be deployed as an applet or
within Java Webstart, but will require JDK 1.4.2+ as the platform. The
target audience are all Windows users.
I've searched the HTTPClient archives and also the forums on Sun's Java
Developer site. The only useful links were:
http://forum.java.sun.com/thread.jsp?forum=30&thread=364342
http://www.mail-archive.com/commons-httpclient-dev@jakarta.apache.org/msg05349.html
I get the following error when trying this out:
java.io.IOException: Proxy service provider is not yet set
at
com.sun.java.browser.net.ProxyService.getProxyInfo(ProxyService.java:40)
...so I assume this only works within Webstart or an applet.
Is there any way I can *automatically* retrieve the user's browser
settings,
even if requires using JNI or JNIWrapper for example ? At least the proxy
host and port, even better if it can automatically enable login (or even
provide me with enough info to use the NTLM features of HTTPClient, if
required by the customer's environment).
Manual proxy configuration generates *way* more support costs at present
than anything else in the project. It's annoying to be disadvantaged in
this way, when most native Windows applications "just work"...
Thanks in advance,
Chris Brown
_________________________________________________________________
Bloquez les fenêtres pop-up, c'est gratuit ! http://toolbar.msn.fr
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To unsubscribe, e-mail:
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