Crate web_transport_quiche 

WebTransport is a protocol for client-server communication over QUIC. It’s available in the browser as an alternative to HTTP and WebSockets.

WebTransport is layered on top of HTTP/3 which is then layered on top of QUIC. This library hides that detail and tries to expose only the QUIC API, delegating as much as possible to the underlying implementation. See the quiche documentation for more documentation.

QUIC provides two primary APIs:

Streams

QUIC streams are ordered, reliable, flow-controlled, and optionally bidirectional. Both endpoints can create and close streams (including an error code) with no overhead. You can think of them as TCP connections, but shared over a single QUIC connection.

Datagrams

QUIC datagrams are unordered, unreliable, and not flow-controlled. Both endpoints can send datagrams below the MTU size (~1.2kb minimum) and they might arrive out of order or not at all. They are basically UDP packets, except they are encrypted and congestion controlled.

Limitations

WebTransport is able to be pooled with HTTP/3 and multiple WebTransport sessions. This crate avoids that complexity, doing the bare minimum to support a single WebTransport session that owns the entire QUIC connection. If you want to support HTTP/3 on the same host/port, you should use another crate (ex. h3-webtransport). If you want to support multiple WebTransport sessions over the same QUIC connection… you should just dial a new QUIC connection instead.

Re-exports

pub use web_transport_proto as proto;

Modules

ez

Easy-to-use QUIC connection and stream management.

h3

HTTP/3 handshake helpers for WebTransport.

Structs

CertificatePath

TLS credentials to authenticate the endpoint.

ClientBuilder

Construct a WebTransport client using sane defaults.

Connection

An established WebTransport session, acting like a full QUIC connection.

RecvStream

A stream that can be used to receive bytes.

SendStream

A stream that can be used to send bytes.

Server

A WebTransport server that accepts new sessions.

ServerBuilder

Construct a WebTransport server using sane defaults.

SessionAccept

Settings

QUIC configuration parameters.

Enums

CertificateKind

Types of PKI certificates supported by the crate.

ClientError

An error returned when connecting to a WebTransport endpoint.

ServerError

An error returned when receiving a new WebTransport session.

SessionError

An error returned by [Connection], split based on whether they are underlying QUIC errors or WebTransport errors.

StreamError

An error when reading from or writing to a WebTransport stream.