How to modify the header of a HttpUrlConnection

java http http-headers httpurlconnection
tigger picture tigger · Jan 26, 2009 · Viewed 56.6k times · Source

Im trying to improve the Java Html Document a little but i'm running into problems with the HttpUrlConntion. One thing is that some servers block a request if the user agent is a Java VM. Another problem is that the HttpUrlConnection does not set the Referrer or Location header field. Since several sites use these fields to verify that the content was accessed from their own site, I'm blocked here as well. As far as I can see the only resolution is to replace the URL handler of the HTTP protocol. Or is there any way to modify the default HTTP Handler?

Answer

Tom Hawtin - tackline picture Tom Hawtin - tackline · Jan 26, 2009

Open the URL with URL.openConnection. Optionally cast to HttpURLConnection. Call URLConnection.setRequestProperty/addRequestProperty.

The default User-Agent header value is set from the "http.agent" system property. The PlugIn and WebStart allow you to set this property.

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