Relating to #523 (and others) - following those changes, I'm now seeing larger requests being buffered. On its own that's fine, but when larger requests are buffered, I'm now observing that when I try to read the request body, I always get an empty string.

That's caused by receiving React\Http\Io\HttpBodyStream in ServerRequest->getBody(), which has an out-of-spec __toString() implementation. Given that class is marked a @internal, I'm assuming that my actual request handler is receiving that in error.

In the meantime, I can make the buffer size high enough to bypass the problem, but that's not a real solution.

My bridge does nothing special - basic URL-based routing, and the request handler is (effectively) doing json_decode((string)$request->getBody()) which according to the StreamInterface spec should work.

Can you help establish if this is a bug (either here or in react/http), configuration error, or if there's something that needs to be performed on all ServerRequestInterface/StreamInterfaces to establish if there's buffering occurring and ensure that everything is read before the request is handled? This behavior doesn't seem to be noted in the PHP-PM documentation anywhere.