netty5/codec-http
Kasimir Torri c97981403d
Improve PerMessageDeflateClientExtensionHandler (#11413)
Motivation:

The `PerMessageDeflateClientExtensionHandler` has the following strange behaviors currently:

* The `requestedServerNoContext` parameter doesn't actually add the `server_no_context_takeover` parameter to the client offer; instead it depends on the requested server window size.
* The handshake will fail if the server responds with a `server_no_context_takeover` parameter and `requestedServerNoContext` is false. According to RFC 7692 (7.1.1.1) the server may do this, and this means that to cover both cases one needs to use two handshakers in the channel pipeline: one with `requestedServerNoContext = true` and one with `requestedServerNoContext = false`.
* The value of the `server_max_window_bits` parameter in the server response is never checked (should be between 8 and 15). And the value of `client_max_window_bits` is checked only in the branch handling the server window parameter.

Modification:

* Add the `server_no_context_takeover` parameter if `requestedServerNoContext` is true.
* Accept a server handshake response which includes the server no context takeover parameter even if we did not request it.
* Check the values of the client and server window size in their respective branches and fail the handshake if they are out of bounds.

Result:

There will be no need to use two handshakers in the pipeline to be lenient in what handshakes are accepted.
2021-07-02 14:47:59 +02:00
..
src Improve PerMessageDeflateClientExtensionHandler (#11413) 2021-07-02 14:47:59 +02:00
pom.xml [maven-release-plugin] prepare for next development iteration 2021-05-19 12:09:18 +00:00