Summary:
Previously, requests were passed to process first in an interceptor, and it is responsibility of an interceptor to process requests for responses. In FlipperOkhttpInterceptor, we did read data from request body before processing it. This caused a bug when the network process itself wants to also read that data, but the stream has been closed because the interceptor has just read. The fix is to report request body after we have triggered network call so that we can just drop request body if we cannot read.
This diff tries to bring back the same functionality while not cause the bug to occur by cloning the content to be read by Flipper and using the same one for the request.
Reviewed By: jknoxville
Differential Revision: D21279679
fbshipit-source-id: 47f8b29a1896705d8d2d601661cd485db572d251
168d06011f