c122e97127
This patch does a bunch of refactoring, mostly around error types, but it also
paves the way to allow `Codec` to be used standalone.
* `Codec` (and `FramedRead` / `FramedWrite`) is broken out into a codec module.
* An h2-codec crate is created that re-exports the frame and codec modules.
* New error types are introduced in the internals:
* `RecvError` represents errors caused by trying to receive a frame.
* `SendError` represents errors caused by trying to send a frame.
* `UserError` is an enum of potential errors caused by invalid usage
by the user of the lib.
* `ProtoError` is either a `Reason` or an `io::Error`. However it doesn't
specify connection or stream level.
* `h2::Error` is an opaque error type and is the only error type exposed
by the public API (used to be `ConnectionError`).
There are misc code changes to enable this as well. The biggest is a new "sink"
API for `Codec`. It provides buffer which queues up a frame followed by flush
which writes everything that is queued. This departs from the `Sink` trait in
order to provide more accurate error values. For example, buffer can never fail
(but it will panic if `poll_ready` is not called first).
103 lines
2.3 KiB
Rust
103 lines
2.3 KiB
Rust
extern crate h2;
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extern crate http;
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extern crate bytes;
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extern crate futures;
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extern crate tokio_io;
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extern crate tokio_core;
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extern crate io_dump;
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extern crate env_logger;
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use h2::*;
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use h2::client::{Client, Body};
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use http::*;
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use futures::*;
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use bytes::*;
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use tokio_core::reactor;
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use tokio_core::net::TcpStream;
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struct Process {
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body: Body<Bytes>,
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trailers: bool,
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}
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impl Future for Process {
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type Item = ();
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type Error = h2::Error;
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fn poll(&mut self) -> Poll<(), h2::Error> {
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loop {
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if self.trailers {
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let trailers = try_ready!(self.body.poll_trailers());
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println!("GOT TRAILERS: {:?}", trailers);
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return Ok(().into());
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} else {
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match try_ready!(self.body.poll()) {
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Some(chunk) => {
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println!("GOT CHUNK = {:?}", chunk);
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}
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None => {
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self.trailers = true;
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}
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}
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}
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}
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}
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}
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pub fn main() {
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let _ = env_logger::init();
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let mut core = reactor::Core::new().unwrap();;
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let handle = core.handle();
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let tcp = TcpStream::connect(
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&"127.0.0.1:5928".parse().unwrap(),
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&handle);
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let tcp = tcp.then(|res| {
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let tcp = io_dump::Dump::to_stdout(res.unwrap());
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Client::handshake(tcp)
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})
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.then(|res| {
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let mut client = res.unwrap();
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println!("sending request");
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let request = Request::builder()
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.uri("https://http2.akamai.com/")
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.body(()).unwrap();
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let mut trailers = HeaderMap::new();
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trailers.insert("zomg", "hello".parse().unwrap());
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let mut stream = client.request(request, false).unwrap();
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// send trailers
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stream.send_trailers(trailers).unwrap();
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// Spawn a task to run the client...
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handle.spawn(client.map_err(|e| println!("GOT ERR={:?}", e)));
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stream.and_then(|response| {
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println!("GOT RESPONSE: {:?}", response);
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// Get the body
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let (_, body) = response.into_parts();
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Process {
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body,
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trailers: false,
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}
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}).map_err(|e| {
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println!("GOT ERR={:?}", e);
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})
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})
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;
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core.run(tcp).unwrap();
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}
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