* http3: implement server idle timeout support
This update introduces the ability for an HTTP/3 server to enforce an idle
timeout on connections. This timeout will trigger when no new requests are
received on a connection, irrespective of any PING frames received at the
QUIC level.
* fix deadlock when http3 idle timeout is not enabled
* fix typo
* Switch to a more efficient implementation
* Avoid a goroutine
* Avoid constent re-adjusting of a timer
* Works with hijacked streams
* Generalize the idle timeout description
* Add an integration test for http server idle timeout
* Attempt to fix other tests impacted by the new idle timeout test
* pass a context to Transport.ConnContext
This context is cancelled when the QUIC connection is closed, or when
the QUIC handshake fails. This allows the application to easily build
and garbage collect a map of active connections.
* correctly handle fresh contexts returned from ConnContext
This is more useful than the maximum frame size. The user of the library
shouldn't have to care about the QUIC framing layer.
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Co-authored-by: 世界 <i@sekai.icu>
Currently the HTTPStreamer is implemented on the http.Request.Body. This
complicates usage, since it's not easily possible to flush the HTTP
header, requiring users to manually flash the header before taking over
the stream.
With this change, the HTTP header is now flushed automatically as soon
as HTTPStream is called.
The stream exposes two methods required for doing an HTTP request:
SendRequestHeader and ReadResponse. This can be used by applications
that wish to use the stream for non-HTTP content afterwards. This will
lead to a simplification in the API we need to expose for WebTransport,
and will make it easier to send HTTP Datagrams associated with this
stream.
The http.Request.Body can be type-asserted to a http3.Settingser. The
Settings method on this interface blocks until the client's SETTINGS
frame has been received.
* use Transport.VerifySourceAddress to control the Retry Mechanism
This can be used to rate-limit handshakes originating from unverified
source addresses. Rate-limiting for handshakes can be implemented using
the GetConfigForClient callback on the Config.
* pass the remote address to Transport.VerifySourceAddress
For some requests, the client is required to check the server's HTTP/3
SETTINGS. For example, a client is only allowed to send HTTP/3 datagrams
if the server explicitly enabled support.
SETTINGS are sent asynchronously on a control stream (usually the first
unidirectional stream). This means that the SETTINGS might not be
available at the beginning of the connection. This is not expected to be
the common case, since the server can send the SETTINGS in 0.5-RTT data,
but we have to be able to deal with arbitrary delays.
For WebTransport, there are even more SETTINGS values that the client
needs to check. By making CheckSettings a callback on the RoundTripOpt,
this entire validation logic can live at the WebTransport layer.
