support get the response body in java-cef #507

I am a java developer， I want to handle the following work with java-cef：

1. Track a specific url when the operator is working in the browser window
2. Analyze the content of the response body sent by the server before it is uploaded to the window.

However, I can't get the actual content of the response body sent by the server with java-cef.

Thank you very much in advance & best regards!