urlconnection

How to use java.net.URLConnection to fire and handle HTTP requests

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Use of java.net.URLConnection is asked about pretty often here, and the Oracle tutorial is too concise about it. That tutorial basically only shows how to fire a GET request and read the response. It doesn’t explain anywhere how to use it to, among others, perform a POST request, set request headers, read response headers, deal … Read more

Why would a “java.net.ConnectException: Connection timed out” exception occur when URL is up?

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Connection timeouts (assuming a local network and several client machines) typically result from a) some kind of firewall on the way that simply eats the packets without telling the sender things like “No Route to host” b) packet loss due to wrong network configuration or line overload c) too many requests overloading the server d) … Read more