Downloading a file in OkHttp means streaming ResponseBody , choosing a sink, and closing resources correctly. In JQuickCurl, a download is just another curl command: add --output './download/report.pdf' (or -o ) and the executor writes the response bytes to that path for you . No InputStream juggling, no try-with-resources plumbing in your business code. This post covers: The --output one-liner that saves straight to disk. Returning byte[] and saving in Java for full contro...