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I have Google'd my butt off, and I can't find anything on this topic.
I am trying to create a download client using Java, and I have figured out how to download files with Java, but I want to accelerate the download speed. I know how this works (opening several connections to the download server), but how can I achieve this?
I am looking for either some detailed explanation of such an algorithm or some code examples.
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This is only possible if the server side supports range requests. You can determine that by checking using a HEAD request if the HTTP response header contains Accept-Ranges: bytes. If that is the case, then you can just spawn several threads which downloads the file in parts using the Range header. The URLConnection and ExecutorService are helpful in this.
Keep in mind that you also take the limitation in amount of threads and network bandwidth of your own machine into account.
URLConnection to fire and handle HTTP requests
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