How to authenticate Java to fetch URL

Question

I want to fetch a URL with java.net but any connection is refused. I know that when I ask for a page, my browser (IE) uses my Windows login ID to authenticate me, then pass my request through a proxy. Can someone please help me translate this process into the Java libraries and steps to fetch webpage? Thank you.

EDIT: - I'm not sure what kind of authentication it uses here. Before any page is retrieved, it pops up a login window where I have to type in my domain\userid and password. How can I figure out the type of authentication?
- The proxy changes via an automatic configuration script.

kvista · Accepted Answer · 2011-01-12 13:07:39Z

1

I recommend you use HttpClient, which makes authentication very simple:

http://hc.apache.org/httpclient-3.x/authentication.html

It's not clear from your question what exactly the role of the proxy is here in authenticating you, but a combination of HttpClient + the right headers (if you need them) should be sufficient.

answered Jan 12, 2011 at 13:07

kvista

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trojanfoe · Accepted Answer · 2011-01-12 13:06:42Z

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You can configure the Java runtime to use a proxy for Network comms. See this article.

answered Jan 12, 2011 at 13:06

trojanfoe

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Neil Wightman · Accepted Answer · 2011-01-12 13:22:01Z

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You may want to try

java.net.Authenticator.setDefault(yourCustomAuthenticator);

answered Jan 12, 2011 at 13:22

Neil Wightman

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