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Some improvements to the wasi-http client implementation of write. (#6161)

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* Improve write implementation for streams

* Add trailers implementation for responses.

* Improve tests.

* Update tests.
This commit is contained in:
Brendan Burns
2023-04-10 20:26:19 -07:00
committed by GitHub
parent 85f0c68008
commit 3ff6e0fe03
8 changed files with 166 additions and 33 deletions
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4
Cargo.lock generated
View File

@@ -3045,6 +3045,10 @@ dependencies = [
"cap-std",
"cargo_metadata",
"cfg-if",
"http",
"http-body",
"http-body-util",
"hyper",
"os_pipe",
"target-lexicon",
"tempfile",

6
crates/test-programs/Cargo.toml
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@@ -23,8 +23,12 @@ os_pipe = "0.9"
anyhow = { workspace = true }
wat = { workspace = true }
cap-std = { workspace = true }
tokio = { version = "1.8.0", features = ["rt-multi-thread"] }
tokio = { version = "1.8.0", features = ["net", "rt-multi-thread"] }
wasmtime-wasi-http = { workspace = true }
hyper = { version = "1.0.0-rc.3", features = ["full"] }
http = { version = "0.2.9" }
http-body = "1.0.0-rc.2"
http-body-util = "0.1.0-rc.2"
[features]
test_programs = []

48
crates/test-programs/tests/http_tests/runtime/wasi_http_tests.rs
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@@ -4,11 +4,59 @@ use wasmtime::{Config, Engine, Linker, Module, Store};
use wasmtime_wasi::{sync::WasiCtxBuilder, WasiCtx};
use wasmtime_wasi_http::WasiHttp;
use http_body_util::combinators::BoxBody;
use http_body_util::BodyExt;
use hyper::server::conn::http1;
use hyper::{body::Bytes, service::service_fn, Request, Response};
use std::{error::Error, net::SocketAddr};
use tokio::net::TcpListener;
async fn test(
req: Request<hyper::body::Incoming>,
) -> http::Result<Response<BoxBody<Bytes, hyper::Error>>> {
let method = req.method().to_string();
Response::builder()
.status(http::StatusCode::OK)
.header("x-wasmtime-test-method", method)
.body(req.into_body().boxed())
}
async fn async_run_serve() -> Result<(), Box<dyn Error + Send + Sync>> {
let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
let listener = TcpListener::bind(addr).await?;
loop {
let (stream, _) = listener.accept().await?;
tokio::task::spawn(async move {
if let Err(err) = http1::Builder::new()
.serve_connection(stream, service_fn(test))
.await
{
println!("Error serving connection: {:?}", err);
}
});
}
}
fn run_server() -> Result<(), Box<dyn Error + Send + Sync>> {
let rt = tokio::runtime::Runtime::new()?;
let _ent = rt.enter();
rt.block_on(async_run_serve())?;
Ok(())
}
pub fn instantiate_inherit_stdio(
data: &[u8],
bin_name: &str,
_workspace: Option<&Path>,
) -> anyhow::Result<()> {
let _thread = std::thread::spawn(|| {
run_server().unwrap();
});
let config = Config::new();
let engine = Engine::new(&config)?;
let module = Module::new(&engine, &data).context("failed to create wasm module")?;

47
crates/test-programs/wasi-http-tests/src/bin/outbound_request.rs
View File

@@ -21,6 +21,14 @@ impl fmt::Debug for Response {
}
}
impl Response {
fn header(&self, name: &str) -> Option<&String> {
self.headers.iter().find_map(
|(k, v)| if k == name { Some(v) } else { None }
)
}
}
fn request(
method: types::MethodParam<'_>,
scheme: types::SchemeParam<'_>,
@@ -47,9 +55,13 @@ fn request(
body_cursor += written as usize;
}
let future_response = default_outgoing_http::handle(request, None);
// TODO: The current implementation requires this drop after the request is sent.
// The ownership semantics are unclear in wasi-http we should clarify exactly what is
// supposed to happen here.
streams::drop_output_stream(request_body);
let future_response = default_outgoing_http::handle(request, None);
// TODO: we could create a pollable from the future_response and poll on it here to test that
// its available immediately
@@ -71,7 +83,6 @@ fn request(
let body_stream = types::incoming_response_consume(incoming_response)
.map_err(|()| anyhow!("incoming response has no body stream"))?;
types::drop_incoming_response(incoming_response);
let mut body = Vec::new();
let mut eof = false;
@@ -81,6 +92,7 @@ fn request(
body.append(&mut body_chunk);
}
streams::drop_input_stream(body_stream);
types::drop_incoming_response(incoming_response);
Ok(Response {
status,
@@ -89,44 +101,55 @@ fn request(
})
}
fn main() -> Result<()> {
fn main() -> Result<()> {
let missing = "MISSING".to_string();
let r1 = request(
types::MethodParam::Get,
types::SchemeParam::Http,
"postman-echo.com",
"localhost:3000",
"/get",
"?some=arg?goes=here",
&[],
)
.context("postman-echo /get")?;
.context("localhost:3000 /get")?;
println!("postman-echo /get: {r1:?}");
println!("localhost:3000 /get: {r1:?}");
assert_eq!(r1.status, 200);
let method = r1.header("x-wasmtime-test-method").unwrap_or(&missing);
assert_eq!(method, "GET");
assert_eq!(r1.body, b"");
let r2 = request(
types::MethodParam::Post,
types::SchemeParam::Http,
"postman-echo.com",
"localhost:3000",
"/post",
"",
b"{\"foo\": \"bar\"}",
)
.context("postman-echo /post")?;
.context("localhost:3000 /post")?;
println!("postman-echo /post: {r2:?}");
println!("localhost:3000 /post: {r2:?}");
assert_eq!(r2.status, 200);
let method = r2.header("x-wasmtime-test-method").unwrap_or(&missing);
assert_eq!(method, "POST");
assert_eq!(r2.body, b"{\"foo\": \"bar\"}");
let r3 = request(
types::MethodParam::Put,
types::SchemeParam::Http,
"postman-echo.com",
"localhost:3000",
"/put",
"",
&[],
)
.context("postman-echo /put")?;
.context("localhost:3000 /put")?;
println!("postman-echo /put: {r3:?}");
println!("localhost:3000 /put: {r3:?}");
assert_eq!(r3.status, 200);
let method = r3.header("x-wasmtime-test-method").unwrap_or(&missing);
assert_eq!(method, "PUT");
assert_eq!(r3.body, b"");
Ok(())
}

18
crates/wasi-http/src/http_impl.rs
View File

@@ -8,6 +8,7 @@ use bytes::{BufMut, Bytes, BytesMut};
use http_body_util::{BodyExt, Full};
use hyper::Method;
use hyper::Request;
use std::collections::HashMap;
#[cfg(not(any(target_arch = "riscv64", target_arch = "s390x")))]
use std::sync::Arc;
use std::time::Duration;
@@ -201,6 +202,23 @@ impl WasiHttp {
if let Some(chunk) = frame.data_ref() {
buf.put(chunk.clone());
}
if let Some(trailers) = frame.trailers_ref() {
response.trailers = self.fields_id_base;
self.fields_id_base += 1;
let mut map: HashMap<String, Vec<String>> = HashMap::new();
for (name, value) in trailers.iter() {
let key = name.to_string();
match map.get_mut(&key) {
Some(vec) => vec.push(value.to_str()?.to_string()),
None => {
let mut vec = Vec::new();
vec.push(value.to_str()?.to_string());
map.insert(key, vec);
}
};
}
self.fields.insert(response.trailers, map);
}
}
response.body = self.streams_id_base;
self.streams_id_base = self.streams_id_base + 1;

56
crates/wasi-http/src/streams_impl.rs
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@@ -2,6 +2,7 @@ use crate::poll::Pollable;
use crate::streams::{InputStream, OutputStream, StreamError};
use crate::WasiHttp;
use anyhow::{anyhow, bail};
use bytes::BufMut;
use std::vec::Vec;
impl crate::streams::Host for WasiHttp {
@@ -27,10 +28,23 @@ impl crate::streams::Host for WasiHttp {
fn skip(
&mut self,
_this: InputStream,
_len: u64,
stream: InputStream,
len: u64,
) -> wasmtime::Result<Result<(u64, bool), StreamError>> {
bail!("unimplemented: skip");
let s = self
.streams
.get_mut(&stream)
.ok_or_else(|| anyhow!("stream not found: {stream}"))?;
if len == 0 {
Ok(Ok((0, s.len() > 0)))
} else if s.len() > len.try_into()? {
s.truncate(len.try_into()?);
Ok(Ok((len, false)))
} else {
let bytes = s.len();
s.truncate(s.len());
Ok(Ok((bytes.try_into()?, true)))
}
}
fn subscribe_to_input_stream(&mut self, _this: InputStream) -> wasmtime::Result<Pollable> {
@@ -38,11 +52,7 @@ impl crate::streams::Host for WasiHttp {
}
fn drop_input_stream(&mut self, stream: InputStream) -> wasmtime::Result<()> {
let r = self
.streams
.get_mut(&stream)
.ok_or_else(|| anyhow!("no such input-stream {stream}"))?;
r.truncate(0);
self.streams.remove(&stream);
Ok(())
}
@@ -51,17 +61,32 @@ impl crate::streams::Host for WasiHttp {
this: OutputStream,
buf: Vec<u8>,
) -> wasmtime::Result<Result<u64, StreamError>> {
// TODO: Make this a real write not a replace.
self.streams.insert(this, bytes::Bytes::from(buf.clone()));
match self.streams.get(&this) {
Some(data) => {
let mut new = bytes::BytesMut::with_capacity(data.len() + buf.len());
new.put(data.clone());
new.put(bytes::Bytes::from(buf.clone()));
self.streams.insert(this, new.freeze());
}
None => {
self.streams.insert(this, bytes::Bytes::from(buf.clone()));
}
}
Ok(Ok(buf.len().try_into()?))
}
fn write_zeroes(
&mut self,
_this: OutputStream,
_len: u64,
this: OutputStream,
len: u64,
) -> wasmtime::Result<Result<u64, StreamError>> {
bail!("unimplemented: write_zeroes");
let mut data = Vec::with_capacity(len.try_into()?);
let mut i = 0;
while i < len {
data.push(0);
i = i + 1;
}
self.write(this, data)
}
fn splice(
@@ -85,9 +110,8 @@ impl crate::streams::Host for WasiHttp {
bail!("unimplemented: subscribe_to_output_stream");
}
fn drop_output_stream(&mut self, _this: OutputStream) -> wasmtime::Result<()> {
//bail!("unimplemented: drop_output_stream");
//FIXME: intentionally ignoring
fn drop_output_stream(&mut self, stream: OutputStream) -> wasmtime::Result<()> {
self.streams.remove(&stream);
Ok(())
}
}

2
crates/wasi-http/src/struct.rs
View File

@@ -34,6 +34,7 @@ pub struct ActiveResponse {
pub status: u16,
pub body: u32,
pub response_headers: HashMap<String, Vec<String>>,
pub trailers: u32,
}
impl ActiveRequest {
@@ -60,6 +61,7 @@ impl ActiveResponse {
status: 0,
body: 0,
response_headers: HashMap::new(),
trailers: 0,
}
}
}

18
crates/wasi-http/src/types_impl.rs
View File

@@ -101,8 +101,16 @@ impl crate::types::Host for WasiHttp {
self.fields.insert(id, m.clone());
Ok(id)
}
fn finish_incoming_stream(&mut self, _s: IncomingStream) -> wasmtime::Result<Option<Trailers>> {
bail!("unimplemented: finish_incoming_stream")
fn finish_incoming_stream(&mut self, s: IncomingStream) -> wasmtime::Result<Option<Trailers>> {
for (_, value) in self.responses.iter() {
if value.body == s {
return match value.trailers {
0 => Ok(None),
_ => Ok(Some(value.trailers)),
};
}
}
bail!("unknown stream!")
}
fn finish_outgoing_stream(
&mut self,
@@ -181,8 +189,10 @@ impl crate::types::Host for WasiHttp {
.requests
.get_mut(&request)
.ok_or_else(|| anyhow!("unknown request: {request}"))?;
req.body = self.streams_id_base;
self.streams_id_base = self.streams_id_base + 1;
if req.body == 0 {
req.body = self.streams_id_base;
self.streams_id_base = self.streams_id_base + 1;
}
Ok(Ok(req.body))
}
fn drop_response_outparam(&mut self, _response: ResponseOutparam) -> wasmtime::Result<()> {