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ClientRequest::send_body takes impl MessageBody (#2546)

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Rob Ede 2021-12-25 02:33:37 +00:00 committed by GitHub
parent 1296e07c48
commit d2590fd46c
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18 changed files with 853 additions and 687 deletions
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66
.github/workflows/ci-master.yml vendored Normal file
View file

@ -0,0 +1,66 @@
name: CI (master only)
on:
push:
branches: [master]
jobs:
ci_feature_powerset_check:
name: Verify Feature Combinations
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Install stable
uses: actions-rs/toolchain@v1
with:
toolchain: stable-x86_64-unknown-linux-gnu
profile: minimal
override: true
- name: Generate Cargo.lock
uses: actions-rs/cargo@v1
with: { command: generate-lockfile }
- name: Cache Dependencies
uses: Swatinem/rust-cache@v1.2.0
- name: Install cargo-hack
uses: actions-rs/cargo@v1
with:
command: install
args: cargo-hack
- name: check feature combinations
uses: actions-rs/cargo@v1
with: { command: ci-check-all-feature-powerset }
- name: check feature combinations
uses: actions-rs/cargo@v1
with: { command: ci-check-all-feature-powerset-linux }
coverage:
name: coverage
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Install stable
uses: actions-rs/toolchain@v1
with:
toolchain: stable-x86_64-unknown-linux-gnu
profile: minimal
override: true
- name: Generate Cargo.lock
uses: actions-rs/cargo@v1
with: { command: generate-lockfile }
- name: Cache Dependencies
uses: Swatinem/rust-cache@v1.2.0
- name: Generate coverage file
run: |
cargo install cargo-tarpaulin --vers "^0.13"
cargo tarpaulin --workspace --features=rustls,openssl --out Xml --verbose
- name: Upload to Codecov
uses: codecov/codecov-action@v1
with: { file: cobertura.xml }

62
.github/workflows/ci.yml vendored
View file

@ -96,68 +96,6 @@ jobs:
cargo install cargo-cache --version 0.6.3 --no-default-features --features ci-autoclean
cargo-cache
ci_feature_powerset_check:
name: Verify Feature Combinations
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Install stable
uses: actions-rs/toolchain@v1
with:
toolchain: stable-x86_64-unknown-linux-gnu
profile: minimal
override: true
- name: Generate Cargo.lock
uses: actions-rs/cargo@v1
with: { command: generate-lockfile }
- name: Cache Dependencies
uses: Swatinem/rust-cache@v1.2.0
- name: Install cargo-hack
uses: actions-rs/cargo@v1
with:
command: install
args: cargo-hack
- name: check feature combinations
uses: actions-rs/cargo@v1
with: { command: ci-check-all-feature-powerset }
- name: check feature combinations
uses: actions-rs/cargo@v1
with: { command: ci-check-all-feature-powerset-linux }
coverage:
name: coverage
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Install stable
uses: actions-rs/toolchain@v1
with:
toolchain: stable-x86_64-unknown-linux-gnu
profile: minimal
override: true
- name: Generate Cargo.lock
uses: actions-rs/cargo@v1
with: { command: generate-lockfile }
- name: Cache Dependencies
uses: Swatinem/rust-cache@v1.2.0
- name: Generate coverage file
if: github.ref == 'refs/heads/master'
run: |
cargo install cargo-tarpaulin --vers "^0.13"
cargo tarpaulin --workspace --features=rustls,openssl --out Xml --verbose
- name: Upload to Codecov
if: github.ref == 'refs/heads/master'
uses: codecov/codecov-action@v1
with: { file: cobertura.xml }
rustdoc:
name: doc tests
runs-on: ubuntu-latest

6
awc/CHANGES.md
View file

@ -3,8 +3,14 @@
## Unreleased - 2021-xx-xx
- Rename `Connector::{ssl => openssl}`. [#2503]
- Improve `Client` instantiation efficiency when using `openssl` by only building connectors once. [#2503]
- `ClientRequest::send_body` now takes an `impl MessageBody`. [#2546]
- Rename `MessageBody => ResponseBody` to avoid conflicts with `MessageBody` trait. [#2546]
- `impl Future` for `ResponseBody` no longer requires the body type be `Unpin`. [#2546]
- `impl Future` for `JsonBody` no longer requires the body type be `Unpin`. [#2546]
- `impl Stream` for `ClientResponse` no longer requires the body type be `Unpin`. [#2546]
[#2503]: https://github.com/actix/actix-web/pull/2503
[#2546]: https://github.com/actix/actix-web/pull/2546
## 3.0.0-beta.14 - 2021-12-17

19
awc/src/any_body.rs
View file

@ -77,10 +77,27 @@ impl<B> AnyBody<B>
where
B: MessageBody + 'static,
{
/// Converts a [`MessageBody`] type into the best possible representation.
///
/// Checks size for `None` and tries to convert to `Bytes`. Otherwise, uses the `Body` variant.
pub fn from_message_body(body: B) -> Self
where
B: MessageBody,
{
if matches!(body.size(), BodySize::None) {
return Self::None;
}
match body.try_into_bytes() {
Ok(body) => Self::Bytes { body },
Err(body) => Self::new(body),
}
}
pub fn into_boxed(self) -> AnyBody {
match self {
Self::None => AnyBody::None,
Self::Bytes { body: bytes } => AnyBody::Bytes { body: bytes },
Self::Bytes { body } => AnyBody::Bytes { body },
Self::Body { body } => AnyBody::new_boxed(body),
}
}

2
awc/src/connect.rs
View file

@ -16,7 +16,7 @@ use crate::{
client::{
Connect as ClientConnect, ConnectError, Connection, ConnectionIo, SendRequestError,
},
response::ClientResponse,
ClientResponse,
};
pub type BoxConnectorService = Rc<

6
awc/src/frozen.rs
View file

@ -5,13 +5,13 @@ use futures_core::Stream;
use serde::Serialize;
use actix_http::{
body::MessageBody,
error::HttpError,
header::{HeaderMap, HeaderName, TryIntoHeaderValue},
Method, RequestHead, Uri,
};
use crate::{
any_body::AnyBody,
sender::{RequestSender, SendClientRequest},
BoxError, ClientConfig,
};
@ -46,7 +46,7 @@ impl FrozenClientRequest {
/// Send a body.
pub fn send_body<B>(&self, body: B) -> SendClientRequest
where
B: Into<AnyBody>,
B: MessageBody + 'static,
{
RequestSender::Rc(self.head.clone(), None).send_body(
self.addr,
@ -159,7 +159,7 @@ impl FrozenSendBuilder {
/// Complete request construction and send a body.
pub fn send_body<B>(self, body: B) -> SendClientRequest
where
B: Into<AnyBody>,
B: MessageBody + 'static,
{
if let Some(e) = self.err {
return e.into();

5
awc/src/lib.rs
View file

@ -113,7 +113,7 @@ pub mod error;
mod frozen;
pub mod middleware;
mod request;
mod response;
mod responses;
mod sender;
pub mod test;
pub mod ws;
@ -128,7 +128,8 @@ pub use self::client::Connector;
pub use self::connect::{BoxConnectorService, BoxedSocket, ConnectRequest, ConnectResponse};
pub use self::frozen::{FrozenClientRequest, FrozenSendBuilder};
pub use self::request::ClientRequest;
pub use self::response::{ClientResponse, JsonBody, MessageBody};
#[allow(deprecated)]
pub use self::responses::{ClientResponse, JsonBody, MessageBody, ResponseBody};
pub use self::sender::SendClientRequest;
use std::{convert::TryFrom, rc::Rc, time::Duration};

4
awc/src/middleware/redirect.rs
View file

@ -190,9 +190,7 @@ where
let body_new = if is_redirect {
// try to reuse body
match body {
Some(ref bytes) => AnyBody::Bytes {
body: bytes.clone(),
},
Some(ref bytes) => AnyBody::from(bytes.clone()),
// TODO: should this be AnyBody::Empty or AnyBody::None.
_ => AnyBody::empty(),
}

74
awc/src/request.rs
View file

@ -5,13 +5,13 @@ use futures_core::Stream;
use serde::Serialize;
use actix_http::{
body::MessageBody,
error::HttpError,
header::{self, HeaderMap, HeaderValue, TryIntoHeaderPair},
ConnectionType, Method, RequestHead, Uri, Version,
};
use crate::{
any_body::AnyBody,
error::{FreezeRequestError, InvalidUrl},
frozen::FrozenClientRequest,
sender::{PrepForSendingError, RequestSender, SendClientRequest},
@ -26,20 +26,20 @@ use crate::cookie::{Cookie, CookieJar};
/// This type can be used to construct an instance of `ClientRequest` through a
/// builder-like pattern.
///
/// ```
/// #[actix_rt::main]
/// async fn main() {
/// let response = awc::Client::new()
/// .get("http://www.rust-lang.org") // <- Create request builder
/// .insert_header(("User-Agent", "Actix-web"))
/// .send() // <- Send HTTP request
/// .await;
/// ```no_run
/// # #[actix_rt::main]
/// # async fn main() {
/// let response = awc::Client::new()
/// .get("http://www.rust-lang.org") // <- Create request builder
/// .insert_header(("User-Agent", "Actix-web"))
/// .send() // <- Send HTTP request
/// .await;
///
/// response.and_then(|response| { // <- server HTTP response
/// println!("Response: {:?}", response);
/// Ok(())
/// });
/// }
/// response.and_then(|response| { // <- server HTTP response
/// println!("Response: {:?}", response);
/// Ok(())
/// });
/// # }
/// ```
pub struct ClientRequest {
pub(crate) head: RequestHead,
@ -174,17 +174,13 @@ impl ClientRequest {
/// Append a header, keeping any that were set with an equivalent field name.
///
/// ```
/// # #[actix_rt::main]
/// # async fn main() {
/// # use awc::Client;
/// use awc::http::header::CONTENT_TYPE;
/// ```no_run
/// use awc::{http::header, Client};
///
/// Client::new()
/// .get("http://www.rust-lang.org")
/// .insert_header(("X-TEST", "value"))
/// .insert_header((CONTENT_TYPE, mime::APPLICATION_JSON));
/// # }
/// .insert_header((header::CONTENT_TYPE, mime::APPLICATION_JSON));
/// ```
pub fn append_header(mut self, header: impl TryIntoHeaderPair) -> Self {
match header.try_into_pair() {
@ -252,23 +248,25 @@ impl ClientRequest {
/// Set a cookie
///
/// ```
/// #[actix_rt::main]
/// async fn main() {
/// let resp = awc::Client::new().get("https://www.rust-lang.org")
/// .cookie(
/// awc::cookie::Cookie::build("name", "value")
/// .domain("www.rust-lang.org")
/// .path("/")
/// .secure(true)
/// .http_only(true)
/// .finish(),
/// )
/// .send()
/// .await;
/// ```no_run
/// use awc::{cookie, Client};
///
/// println!("Response: {:?}", resp);
/// }
/// # #[actix_rt::main]
/// # async fn main() {
/// let resp = Client::new().get("https://www.rust-lang.org")
/// .cookie(
/// awc::cookie::Cookie::build("name", "value")
/// .domain("www.rust-lang.org")
/// .path("/")
/// .secure(true)
/// .http_only(true)
/// .finish(),
/// )
/// .send()
/// .await;
///
/// println!("Response: {:?}", resp);
/// # }
/// ```
#[cfg(feature = "cookies")]
pub fn cookie(mut self, cookie: Cookie<'_>) -> Self {
@ -340,7 +338,7 @@ impl ClientRequest {
/// Complete request construction and send body.
pub fn send_body<B>(self, body: B) -> SendClientRequest
where
B: Into<AnyBody>,
B: MessageBody + 'static,
{
let slf = match self.prep_for_sending() {
Ok(slf) => slf,

556
awc/src/response.rs
View file

@ -1,556 +0,0 @@
use std::{
cell::{Ref, RefMut},
fmt,
future::Future,
io,
marker::PhantomData,
pin::Pin,
task::{Context, Poll},
time::{Duration, Instant},
};
use actix_http::{
error::PayloadError, header, header::HeaderMap, BoxedPayloadStream, Extensions,
HttpMessage, Payload, ResponseHead, StatusCode, Version,
};
use actix_rt::time::{sleep, Sleep};
use bytes::{Bytes, BytesMut};
use futures_core::{ready, Stream};
use serde::de::DeserializeOwned;
#[cfg(feature = "cookies")]
use crate::cookie::{Cookie, ParseError as CookieParseError};
use crate::error::JsonPayloadError;
/// Client Response
pub struct ClientResponse<S = BoxedPayloadStream> {
pub(crate) head: ResponseHead,
pub(crate) payload: Payload<S>,
pub(crate) timeout: ResponseTimeout,
}
/// helper enum with reusable sleep passed from `SendClientResponse`.
/// See `ClientResponse::_timeout` for reason.
pub(crate) enum ResponseTimeout {
Disabled(Option<Pin<Box<Sleep>>>),
Enabled(Pin<Box<Sleep>>),
}
impl Default for ResponseTimeout {
fn default() -> Self {
Self::Disabled(None)
}
}
impl ResponseTimeout {
fn poll_timeout(&mut self, cx: &mut Context<'_>) -> Result<(), PayloadError> {
match *self {
Self::Enabled(ref mut timeout) => {
if timeout.as_mut().poll(cx).is_ready() {
Err(PayloadError::Io(io::Error::new(
io::ErrorKind::TimedOut,
"Response Payload IO timed out",
)))
} else {
Ok(())
}
}
Self::Disabled(_) => Ok(()),
}
}
}
impl<S> HttpMessage for ClientResponse<S> {
type Stream = S;
fn headers(&self) -> &HeaderMap {
&self.head.headers
}
fn take_payload(&mut self) -> Payload<S> {
std::mem::replace(&mut self.payload, Payload::None)
}
fn extensions(&self) -> Ref<'_, Extensions> {
self.head.extensions()
}
fn extensions_mut(&self) -> RefMut<'_, Extensions> {
self.head.extensions_mut()
}
}
impl<S> ClientResponse<S> {
/// Create new Request instance
pub(crate) fn new(head: ResponseHead, payload: Payload<S>) -> Self {
ClientResponse {
head,
payload,
timeout: ResponseTimeout::default(),
}
}
#[inline]
pub(crate) fn head(&self) -> &ResponseHead {
&self.head
}
/// Read the Request Version.
#[inline]
pub fn version(&self) -> Version {
self.head().version
}
/// Get the status from the server.
#[inline]
pub fn status(&self) -> StatusCode {
self.head().status
}
#[inline]
/// Returns request's headers.
pub fn headers(&self) -> &HeaderMap {
&self.head().headers
}
/// Set a body and return previous body value
pub fn map_body<F, U>(mut self, f: F) -> ClientResponse<U>
where
F: FnOnce(&mut ResponseHead, Payload<S>) -> Payload<U>,
{
let payload = f(&mut self.head, self.payload);
ClientResponse {
payload,
head: self.head,
timeout: self.timeout,
}
}
/// Set a timeout duration for [`ClientResponse`](self::ClientResponse).
///
/// This duration covers the duration of processing the response body stream
/// and would end it as timeout error when deadline met.
///
/// Disabled by default.
pub fn timeout(self, dur: Duration) -> Self {
let timeout = match self.timeout {
ResponseTimeout::Disabled(Some(mut timeout))
| ResponseTimeout::Enabled(mut timeout) => match Instant::now().checked_add(dur) {
Some(deadline) => {
timeout.as_mut().reset(deadline.into());
ResponseTimeout::Enabled(timeout)
}
None => ResponseTimeout::Enabled(Box::pin(sleep(dur))),
},
_ => ResponseTimeout::Enabled(Box::pin(sleep(dur))),
};
Self {
payload: self.payload,
head: self.head,
timeout,
}
}
/// This method does not enable timeout. It's used to pass the boxed `Sleep` from
/// `SendClientRequest` and reuse it's heap allocation together with it's slot in
/// timer wheel.
pub(crate) fn _timeout(mut self, timeout: Option<Pin<Box<Sleep>>>) -> Self {
self.timeout = ResponseTimeout::Disabled(timeout);
self
}
/// Load request cookies.
#[cfg(feature = "cookies")]
pub fn cookies(&self) -> Result<Ref<'_, Vec<Cookie<'static>>>, CookieParseError> {
struct Cookies(Vec<Cookie<'static>>);
if self.extensions().get::<Cookies>().is_none() {
let mut cookies = Vec::new();
for hdr in self.headers().get_all(&header::SET_COOKIE) {
let s = std::str::from_utf8(hdr.as_bytes()).map_err(CookieParseError::from)?;
cookies.push(Cookie::parse_encoded(s)?.into_owned());
}
self.extensions_mut().insert(Cookies(cookies));
}
Ok(Ref::map(self.extensions(), |ext| {
&ext.get::<Cookies>().unwrap().0
}))
}
/// Return request cookie.
#[cfg(feature = "cookies")]
pub fn cookie(&self, name: &str) -> Option<Cookie<'static>> {
if let Ok(cookies) = self.cookies() {
for cookie in cookies.iter() {
if cookie.name() == name {
return Some(cookie.to_owned());
}
}
}
None
}
}
impl<S> ClientResponse<S>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
{
/// Loads HTTP response's body.
pub fn body(&mut self) -> MessageBody<S> {
MessageBody::new(self)
}
/// Loads and parse `application/json` encoded body.
/// Return `JsonBody<T>` future. It resolves to a `T` value.
///
/// Returns error:
///
/// * content type is not `application/json`
/// * content length is greater than 256k
pub fn json<T: DeserializeOwned>(&mut self) -> JsonBody<S, T> {
JsonBody::new(self)
}
}
impl<S> Stream for ClientResponse<S>
where
S: Stream<Item = Result<Bytes, PayloadError>> + Unpin,
{
type Item = Result<Bytes, PayloadError>;
fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
let this = self.get_mut();
this.timeout.poll_timeout(cx)?;
Pin::new(&mut this.payload).poll_next(cx)
}
}
impl<S> fmt::Debug for ClientResponse<S> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "\nClientResponse {:?} {}", self.version(), self.status(),)?;
writeln!(f, " headers:")?;
for (key, val) in self.headers().iter() {
writeln!(f, " {:?}: {:?}", key, val)?;
}
Ok(())
}
}
const DEFAULT_BODY_LIMIT: usize = 2 * 1024 * 1024;
/// Future that resolves to a complete HTTP message body.
pub struct MessageBody<S> {
length: Option<usize>,
timeout: ResponseTimeout,
body: Result<ReadBody<S>, Option<PayloadError>>,
}
impl<S> MessageBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
{
/// Create `MessageBody` for request.
pub fn new(res: &mut ClientResponse<S>) -> MessageBody<S> {
let length = match res.headers().get(&header::CONTENT_LENGTH) {
Some(value) => {
let len = value.to_str().ok().and_then(|s| s.parse::<usize>().ok());
match len {
None => return Self::err(PayloadError::UnknownLength),
len => len,
}
}
None => None,
};
MessageBody {
length,
timeout: std::mem::take(&mut res.timeout),
body: Ok(ReadBody::new(res.take_payload(), DEFAULT_BODY_LIMIT)),
}
}
/// Change max size of payload. By default max size is 2048kB
pub fn limit(mut self, limit: usize) -> Self {
if let Ok(ref mut body) = self.body {
body.limit = limit;
}
self
}
fn err(e: PayloadError) -> Self {
MessageBody {
length: None,
timeout: ResponseTimeout::default(),
body: Err(Some(e)),
}
}
}
impl<S> Future for MessageBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>> + Unpin,
{
type Output = Result<Bytes, PayloadError>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.get_mut();
match this.body {
Err(ref mut err) => Poll::Ready(Err(err.take().unwrap())),
Ok(ref mut body) => {
if let Some(len) = this.length.take() {
if len > body.limit {
return Poll::Ready(Err(PayloadError::Overflow));
}
}
this.timeout.poll_timeout(cx)?;
Pin::new(body).poll(cx)
}
}
}
}
/// Response's payload json parser, it resolves to a deserialized `T` value.
///
/// Returns error:
///
/// * content type is not `application/json`
/// * content length is greater than 64k
pub struct JsonBody<S, U> {
length: Option<usize>,
err: Option<JsonPayloadError>,
timeout: ResponseTimeout,
fut: Option<ReadBody<S>>,
_phantom: PhantomData<U>,
}
impl<S, U> JsonBody<S, U>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
U: DeserializeOwned,
{
/// Create `JsonBody` for request.
pub fn new(res: &mut ClientResponse<S>) -> Self {
// check content-type
let json = if let Ok(Some(mime)) = res.mime_type() {
mime.subtype() == mime::JSON || mime.suffix() == Some(mime::JSON)
} else {
false
};
if !json {
return JsonBody {
length: None,
fut: None,
timeout: ResponseTimeout::default(),
err: Some(JsonPayloadError::ContentType),
_phantom: PhantomData,
};
}
let mut len = None;
if let Some(l) = res.headers().get(&header::CONTENT_LENGTH) {
if let Ok(s) = l.to_str() {
if let Ok(l) = s.parse::<usize>() {
len = Some(l)
}
}
}
JsonBody {
length: len,
err: None,
timeout: std::mem::take(&mut res.timeout),
fut: Some(ReadBody::new(res.take_payload(), 65536)),
_phantom: PhantomData,
}
}
/// Change max size of payload. By default max size is 64kB
pub fn limit(mut self, limit: usize) -> Self {
if let Some(ref mut fut) = self.fut {
fut.limit = limit;
}
self
}
}
impl<T, U> Unpin for JsonBody<T, U>
where
T: Stream<Item = Result<Bytes, PayloadError>> + Unpin,
U: DeserializeOwned,
{
}
impl<T, U> Future for JsonBody<T, U>
where
T: Stream<Item = Result<Bytes, PayloadError>> + Unpin,
U: DeserializeOwned,
{
type Output = Result<U, JsonPayloadError>;
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
if let Some(err) = self.err.take() {
return Poll::Ready(Err(err));
}
if let Some(len) = self.length.take() {
if len > self.fut.as_ref().unwrap().limit {
return Poll::Ready(Err(JsonPayloadError::Payload(PayloadError::Overflow)));
}
}
self.timeout
.poll_timeout(cx)
.map_err(JsonPayloadError::Payload)?;
let body = ready!(Pin::new(&mut self.get_mut().fut.as_mut().unwrap()).poll(cx))?;
Poll::Ready(serde_json::from_slice::<U>(&body).map_err(JsonPayloadError::from))
}
}
struct ReadBody<S> {
stream: Payload<S>,
buf: BytesMut,
limit: usize,
}
impl<S> ReadBody<S> {
fn new(stream: Payload<S>, limit: usize) -> Self {
Self {
stream,
buf: BytesMut::new(),
limit,
}
}
}
impl<S> Future for ReadBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>> + Unpin,
{
type Output = Result<Bytes, PayloadError>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.get_mut();
while let Some(chunk) = ready!(Pin::new(&mut this.stream).poll_next(cx)?) {
if (this.buf.len() + chunk.len()) > this.limit {
return Poll::Ready(Err(PayloadError::Overflow));
}
this.buf.extend_from_slice(&chunk);
}
Poll::Ready(Ok(this.buf.split().freeze()))
}
}
#[cfg(test)]
mod tests {
use super::*;
use serde::{Deserialize, Serialize};
use crate::{http::header, test::TestResponse};
#[actix_rt::test]
async fn test_body() {
let mut req = TestResponse::with_header((header::CONTENT_LENGTH, "xxxx")).finish();
match req.body().await.err().unwrap() {
PayloadError::UnknownLength => {}
_ => unreachable!("error"),
}
let mut req = TestResponse::with_header((header::CONTENT_LENGTH, "10000000")).finish();
match req.body().await.err().unwrap() {
PayloadError::Overflow => {}
_ => unreachable!("error"),
}
let mut req = TestResponse::default()
.set_payload(Bytes::from_static(b"test"))
.finish();
assert_eq!(req.body().await.ok().unwrap(), Bytes::from_static(b"test"));
let mut req = TestResponse::default()
.set_payload(Bytes::from_static(b"11111111111111"))
.finish();
match req.body().limit(5).await.err().unwrap() {
PayloadError::Overflow => {}
_ => unreachable!("error"),
}
}
#[derive(Serialize, Deserialize, PartialEq, Debug)]
struct MyObject {
name: String,
}
fn json_eq(err: JsonPayloadError, other: JsonPayloadError) -> bool {
match err {
JsonPayloadError::Payload(PayloadError::Overflow) => {
matches!(other, JsonPayloadError::Payload(PayloadError::Overflow))
}
JsonPayloadError::ContentType => matches!(other, JsonPayloadError::ContentType),
_ => false,
}
}
#[actix_rt::test]
async fn test_json_body() {
let mut req = TestResponse::default().finish();
let json = JsonBody::<_, MyObject>::new(&mut req).await;
assert!(json_eq(json.err().unwrap(), JsonPayloadError::ContentType));
let mut req = TestResponse::default()
.insert_header((
header::CONTENT_TYPE,
header::HeaderValue::from_static("application/text"),
))
.finish();
let json = JsonBody::<_, MyObject>::new(&mut req).await;
assert!(json_eq(json.err().unwrap(), JsonPayloadError::ContentType));
let mut req = TestResponse::default()
.insert_header((
header::CONTENT_TYPE,
header::HeaderValue::from_static("application/json"),
))
.insert_header((
header::CONTENT_LENGTH,
header::HeaderValue::from_static("10000"),
))
.finish();
let json = JsonBody::<_, MyObject>::new(&mut req).limit(100).await;
assert!(json_eq(
json.err().unwrap(),
JsonPayloadError::Payload(PayloadError::Overflow)
));
let mut req = TestResponse::default()
.insert_header((
header::CONTENT_TYPE,
header::HeaderValue::from_static("application/json"),
))
.insert_header((
header::CONTENT_LENGTH,
header::HeaderValue::from_static("16"),
))
.set_payload(Bytes::from_static(b"{\"name\": \"test\"}"))
.finish();
let json = JsonBody::<_, MyObject>::new(&mut req).await;
assert_eq!(
json.ok().unwrap(),
MyObject {
name: "test".to_owned()
}
);
}
}

192
awc/src/responses/json_body.rs Normal file
View file

@ -0,0 +1,192 @@
use std::{
future::Future,
marker::PhantomData,
mem,
pin::Pin,
task::{Context, Poll},
};
use actix_http::{error::PayloadError, header, HttpMessage};
use bytes::Bytes;
use futures_core::{ready, Stream};
use pin_project_lite::pin_project;
use serde::de::DeserializeOwned;
use super::{read_body::ReadBody, ResponseTimeout, DEFAULT_BODY_LIMIT};
use crate::{error::JsonPayloadError, ClientResponse};
pin_project! {
/// A `Future` that reads a body stream, parses JSON, resolving to a deserialized `T`.
///
/// # Errors
/// `Future` implementation returns error if:
/// - content type is not `application/json`;
/// - content length is greater than [limit](JsonBody::limit) (default: 2 MiB).
pub struct JsonBody<S, T> {
#[pin]
body: Option<ReadBody<S>>,
length: Option<usize>,
timeout: ResponseTimeout,
err: Option<JsonPayloadError>,
_phantom: PhantomData<T>,
}
}
impl<S, T> JsonBody<S, T>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
T: DeserializeOwned,
{
/// Creates a JSON body stream reader from a response by taking its payload.
pub fn new(res: &mut ClientResponse<S>) -> Self {
// check content-type
let json = if let Ok(Some(mime)) = res.mime_type() {
mime.subtype() == mime::JSON || mime.suffix() == Some(mime::JSON)
} else {
false
};
if !json {
return JsonBody {
length: None,
body: None,
timeout: ResponseTimeout::default(),
err: Some(JsonPayloadError::ContentType),
_phantom: PhantomData,
};
}
let length = res
.headers()
.get(&header::CONTENT_LENGTH)
.and_then(|len_hdr| len_hdr.to_str().ok())
.and_then(|len_str| len_str.parse::<usize>().ok());
JsonBody {
body: Some(ReadBody::new(res.take_payload(), DEFAULT_BODY_LIMIT)),
length,
timeout: mem::take(&mut res.timeout),
err: None,
_phantom: PhantomData,
}
}
/// Change max size of payload. Default limit is 2 MiB.
pub fn limit(mut self, limit: usize) -> Self {
if let Some(ref mut fut) = self.body {
fut.limit = limit;
}
self
}
}
impl<S, T> Future for JsonBody<S, T>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
T: DeserializeOwned,
{
type Output = Result<T, JsonPayloadError>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.project();
if let Some(err) = this.err.take() {
return Poll::Ready(Err(err));
}
if let Some(len) = this.length.take() {
let body = Option::as_ref(&this.body).unwrap();
if len > body.limit {
return Poll::Ready(Err(JsonPayloadError::Payload(PayloadError::Overflow)));
}
}
this.timeout
.poll_timeout(cx)
.map_err(JsonPayloadError::Payload)?;
let body = ready!(this.body.as_pin_mut().unwrap().poll(cx))?;
Poll::Ready(serde_json::from_slice::<T>(&body).map_err(JsonPayloadError::from))
}
}
#[cfg(test)]
mod tests {
use actix_http::BoxedPayloadStream;
use serde::{Deserialize, Serialize};
use static_assertions::assert_impl_all;
use super::*;
use crate::{http::header, test::TestResponse};
assert_impl_all!(JsonBody<BoxedPayloadStream, String>: Unpin);
#[derive(Serialize, Deserialize, PartialEq, Debug)]
struct MyObject {
name: String,
}
fn json_eq(err: JsonPayloadError, other: JsonPayloadError) -> bool {
match err {
JsonPayloadError::Payload(PayloadError::Overflow) => {
matches!(other, JsonPayloadError::Payload(PayloadError::Overflow))
}
JsonPayloadError::ContentType => matches!(other, JsonPayloadError::ContentType),
_ => false,
}
}
#[actix_rt::test]
async fn read_json_body() {
let mut req = TestResponse::default().finish();
let json = JsonBody::<_, MyObject>::new(&mut req).await;
assert!(json_eq(json.err().unwrap(), JsonPayloadError::ContentType));
let mut req = TestResponse::default()
.insert_header((
header::CONTENT_TYPE,
header::HeaderValue::from_static("application/text"),
))
.finish();
let json = JsonBody::<_, MyObject>::new(&mut req).await;
assert!(json_eq(json.err().unwrap(), JsonPayloadError::ContentType));
let mut req = TestResponse::default()
.insert_header((
header::CONTENT_TYPE,
header::HeaderValue::from_static("application/json"),
))
.insert_header((
header::CONTENT_LENGTH,
header::HeaderValue::from_static("10000"),
))
.finish();
let json = JsonBody::<_, MyObject>::new(&mut req).limit(100).await;
assert!(json_eq(
json.err().unwrap(),
JsonPayloadError::Payload(PayloadError::Overflow)
));
let mut req = TestResponse::default()
.insert_header((
header::CONTENT_TYPE,
header::HeaderValue::from_static("application/json"),
))
.insert_header((
header::CONTENT_LENGTH,
header::HeaderValue::from_static("16"),
))
.set_payload(Bytes::from_static(b"{\"name\": \"test\"}"))
.finish();
let json = JsonBody::<_, MyObject>::new(&mut req).await;
assert_eq!(
json.ok().unwrap(),
MyObject {
name: "test".to_owned()
}
);
}
}

49
awc/src/responses/mod.rs Normal file
View file

@ -0,0 +1,49 @@
use std::{future::Future, io, pin::Pin, task::Context};
use actix_http::error::PayloadError;
use actix_rt::time::Sleep;
mod json_body;
mod read_body;
mod response;
mod response_body;
pub use self::json_body::JsonBody;
pub use self::response::ClientResponse;
#[allow(deprecated)]
pub use self::response_body::{MessageBody, ResponseBody};
/// Default body size limit: 2 MiB
const DEFAULT_BODY_LIMIT: usize = 2 * 1024 * 1024;
/// Helper enum with reusable sleep passed from `SendClientResponse`.
///
/// See [`ClientResponse::_timeout`] for reason.
pub(crate) enum ResponseTimeout {
Disabled(Option<Pin<Box<Sleep>>>),
Enabled(Pin<Box<Sleep>>),
}
impl Default for ResponseTimeout {
fn default() -> Self {
Self::Disabled(None)
}
}
impl ResponseTimeout {
fn poll_timeout(&mut self, cx: &mut Context<'_>) -> Result<(), PayloadError> {
match *self {
Self::Enabled(ref mut timeout) => {
if timeout.as_mut().poll(cx).is_ready() {
Err(PayloadError::Io(io::Error::new(
io::ErrorKind::TimedOut,
"Response Payload IO timed out",
)))
} else {
Ok(())
}
}
Self::Disabled(_) => Ok(()),
}
}
}

61
awc/src/responses/read_body.rs Normal file
View file

@ -0,0 +1,61 @@
use std::{
future::Future,
pin::Pin,
task::{Context, Poll},
};
use actix_http::{error::PayloadError, Payload};
use bytes::{Bytes, BytesMut};
use futures_core::{ready, Stream};
use pin_project_lite::pin_project;
pin_project! {
pub(crate) struct ReadBody<S> {
#[pin]
pub(crate) stream: Payload<S>,
pub(crate) buf: BytesMut,
pub(crate) limit: usize,
}
}
impl<S> ReadBody<S> {
pub(crate) fn new(stream: Payload<S>, limit: usize) -> Self {
Self {
stream,
buf: BytesMut::new(),
limit,
}
}
}
impl<S> Future for ReadBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
{
type Output = Result<Bytes, PayloadError>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let mut this = self.project();
while let Some(chunk) = ready!(this.stream.as_mut().poll_next(cx)?) {
if (this.buf.len() + chunk.len()) > *this.limit {
return Poll::Ready(Err(PayloadError::Overflow));
}
this.buf.extend_from_slice(&chunk);
}
Poll::Ready(Ok(this.buf.split().freeze()))
}
}
#[cfg(test)]
mod tests {
use static_assertions::assert_impl_all;
use super::*;
use crate::any_body::AnyBody;
assert_impl_all!(ReadBody<()>: Unpin);
assert_impl_all!(ReadBody<AnyBody>: Unpin);
}

257
awc/src/responses/response.rs Normal file
View file

@ -0,0 +1,257 @@
use std::{
cell::{Ref, RefMut},
fmt, mem,
pin::Pin,
task::{Context, Poll},
time::{Duration, Instant},
};
use actix_http::{
error::PayloadError, header, header::HeaderMap, BoxedPayloadStream, Extensions,
HttpMessage, Payload, ResponseHead, StatusCode, Version,
};
use actix_rt::time::{sleep, Sleep};
use bytes::Bytes;
use futures_core::Stream;
use pin_project_lite::pin_project;
use serde::de::DeserializeOwned;
#[cfg(feature = "cookies")]
use crate::cookie::{Cookie, ParseError as CookieParseError};
use super::{JsonBody, ResponseBody, ResponseTimeout};
pin_project! {
/// Client Response
pub struct ClientResponse<S = BoxedPayloadStream> {
pub(crate) head: ResponseHead,
#[pin]
pub(crate) payload: Payload<S>,
pub(crate) timeout: ResponseTimeout,
}
}
impl<S> ClientResponse<S> {
/// Create new Request instance
pub(crate) fn new(head: ResponseHead, payload: Payload<S>) -> Self {
ClientResponse {
head,
payload,
timeout: ResponseTimeout::default(),
}
}
#[inline]
pub(crate) fn head(&self) -> &ResponseHead {
&self.head
}
/// Read the Request Version.
#[inline]
pub fn version(&self) -> Version {
self.head().version
}
/// Get the status from the server.
#[inline]
pub fn status(&self) -> StatusCode {
self.head().status
}
#[inline]
/// Returns request's headers.
pub fn headers(&self) -> &HeaderMap {
&self.head().headers
}
/// Set a body and return previous body value
pub fn map_body<F, U>(mut self, f: F) -> ClientResponse<U>
where
F: FnOnce(&mut ResponseHead, Payload<S>) -> Payload<U>,
{
let payload = f(&mut self.head, self.payload);
ClientResponse {
payload,
head: self.head,
timeout: self.timeout,
}
}
/// Set a timeout duration for [`ClientResponse`](self::ClientResponse).
///
/// This duration covers the duration of processing the response body stream
/// and would end it as timeout error when deadline met.
///
/// Disabled by default.
pub fn timeout(self, dur: Duration) -> Self {
let timeout = match self.timeout {
ResponseTimeout::Disabled(Some(mut timeout))
| ResponseTimeout::Enabled(mut timeout) => match Instant::now().checked_add(dur) {
Some(deadline) => {
timeout.as_mut().reset(deadline.into());
ResponseTimeout::Enabled(timeout)
}
None => ResponseTimeout::Enabled(Box::pin(sleep(dur))),
},
_ => ResponseTimeout::Enabled(Box::pin(sleep(dur))),
};
Self {
payload: self.payload,
head: self.head,
timeout,
}
}
/// This method does not enable timeout. It's used to pass the boxed `Sleep` from
/// `SendClientRequest` and reuse it's heap allocation together with it's slot in
/// timer wheel.
pub(crate) fn _timeout(mut self, timeout: Option<Pin<Box<Sleep>>>) -> Self {
self.timeout = ResponseTimeout::Disabled(timeout);
self
}
/// Load request cookies.
#[cfg(feature = "cookies")]
pub fn cookies(&self) -> Result<Ref<'_, Vec<Cookie<'static>>>, CookieParseError> {
struct Cookies(Vec<Cookie<'static>>);
if self.extensions().get::<Cookies>().is_none() {
let mut cookies = Vec::new();
for hdr in self.headers().get_all(&header::SET_COOKIE) {
let s = std::str::from_utf8(hdr.as_bytes()).map_err(CookieParseError::from)?;
cookies.push(Cookie::parse_encoded(s)?.into_owned());
}
self.extensions_mut().insert(Cookies(cookies));
}
Ok(Ref::map(self.extensions(), |ext| {
&ext.get::<Cookies>().unwrap().0
}))
}
/// Return request cookie.
#[cfg(feature = "cookies")]
pub fn cookie(&self, name: &str) -> Option<Cookie<'static>> {
if let Ok(cookies) = self.cookies() {
for cookie in cookies.iter() {
if cookie.name() == name {
return Some(cookie.to_owned());
}
}
}
None
}
}
impl<S> ClientResponse<S>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
{
/// Returns a [`Future`] that consumes the body stream and resolves to [`Bytes`].
///
/// # Errors
/// `Future` implementation returns error if:
/// - content type is not `application/json`
/// - content length is greater than [limit](JsonBody::limit) (default: 2 MiB)
///
/// # Examples
/// ```no_run
/// # use awc::Client;
/// # use bytes::Bytes;
/// # #[actix_rt::main]
/// # async fn async_ctx() -> Result<(), Box<dyn std::error::Error>> {
/// let client = Client::default();
/// let mut res = client.get("https://httpbin.org/robots.txt").send().await?;
/// let body: Bytes = res.body().await?;
/// # Ok(())
/// # }
/// ```
///
/// [`Future`]: std::future::Future
pub fn body(&mut self) -> ResponseBody<S> {
ResponseBody::new(self)
}
/// Returns a [`Future`] consumes the body stream, parses JSON, and resolves to a deserialized
/// `T` value.
///
/// # Errors
/// Future returns error if:
/// - content type is not `application/json`;
/// - content length is greater than [limit](JsonBody::limit) (default: 2 MiB).
///
/// # Examples
/// ```no_run
/// # use awc::Client;
/// # #[actix_rt::main]
/// # async fn async_ctx() -> Result<(), Box<dyn std::error::Error>> {
/// let client = Client::default();
/// let mut res = client.get("https://httpbin.org/json").send().await?;
/// let val = res.json::<serde_json::Value>().await?;
/// assert!(val.is_object());
/// # Ok(())
/// # }
/// ```
///
/// [`Future`]: std::future::Future
pub fn json<T: DeserializeOwned>(&mut self) -> JsonBody<S, T> {
JsonBody::new(self)
}
}
impl<S> fmt::Debug for ClientResponse<S> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "\nClientResponse {:?} {}", self.version(), self.status(),)?;
writeln!(f, " headers:")?;
for (key, val) in self.headers().iter() {
writeln!(f, " {:?}: {:?}", key, val)?;
}
Ok(())
}
}
impl<S> HttpMessage for ClientResponse<S> {
type Stream = S;
fn headers(&self) -> &HeaderMap {
&self.head.headers
}
fn take_payload(&mut self) -> Payload<S> {
mem::replace(&mut self.payload, Payload::None)
}
fn extensions(&self) -> Ref<'_, Extensions> {
self.head.extensions()
}
fn extensions_mut(&self) -> RefMut<'_, Extensions> {
self.head.extensions_mut()
}
}
impl<S> Stream for ClientResponse<S>
where
S: Stream<Item = Result<Bytes, PayloadError>> + Unpin,
{
type Item = Result<Bytes, PayloadError>;
fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
let this = self.project();
this.timeout.poll_timeout(cx)?;
this.payload.poll_next(cx)
}
}
#[cfg(test)]
mod tests {
use static_assertions::assert_impl_all;
use super::*;
use crate::any_body::AnyBody;
assert_impl_all!(ClientResponse: Unpin);
assert_impl_all!(ClientResponse<()>: Unpin);
assert_impl_all!(ClientResponse<AnyBody>: Unpin);
}

144
awc/src/responses/response_body.rs Normal file
View file

@ -0,0 +1,144 @@
use std::{
future::Future,
mem,
pin::Pin,
task::{Context, Poll},
};
use actix_http::{error::PayloadError, header, HttpMessage};
use bytes::Bytes;
use futures_core::Stream;
use pin_project_lite::pin_project;
use super::{read_body::ReadBody, ResponseTimeout, DEFAULT_BODY_LIMIT};
use crate::ClientResponse;
pin_project! {
/// A `Future` that reads a body stream, resolving as [`Bytes`].
///
/// # Errors
/// `Future` implementation returns error if:
/// - content type is not `application/json`;
/// - content length is greater than [limit](JsonBody::limit) (default: 2 MiB).
pub struct ResponseBody<S> {
#[pin]
body: Option<ReadBody<S>>,
length: Option<usize>,
timeout: ResponseTimeout,
err: Option<PayloadError>,
}
}
#[deprecated(since = "3.0.0", note = "Renamed to `ResponseBody`.")]
pub type MessageBody<B> = ResponseBody<B>;
impl<S> ResponseBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
{
/// Creates a body stream reader from a response by taking its payload.
pub fn new(res: &mut ClientResponse<S>) -> ResponseBody<S> {
let length = match res.headers().get(&header::CONTENT_LENGTH) {
Some(value) => {
let len = value.to_str().ok().and_then(|s| s.parse::<usize>().ok());
match len {
None => return Self::err(PayloadError::UnknownLength),
len => len,
}
}
None => None,
};
ResponseBody {
body: Some(ReadBody::new(res.take_payload(), DEFAULT_BODY_LIMIT)),
length,
timeout: mem::take(&mut res.timeout),
err: None,
}
}
/// Change max size limit of payload.
///
/// The default limit is 2 MiB.
pub fn limit(mut self, limit: usize) -> Self {
if let Some(ref mut body) = self.body {
body.limit = limit;
}
self
}
fn err(err: PayloadError) -> Self {
ResponseBody {
body: None,
length: None,
timeout: ResponseTimeout::default(),
err: Some(err),
}
}
}
impl<S> Future for ResponseBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
{
type Output = Result<Bytes, PayloadError>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.project();
if let Some(err) = this.err.take() {
return Poll::Ready(Err(err));
}
if let Some(len) = this.length.take() {
let body = Option::as_ref(&this.body).unwrap();
if len > body.limit {
return Poll::Ready(Err(PayloadError::Overflow));
}
}
this.timeout.poll_timeout(cx)?;
this.body.as_pin_mut().unwrap().poll(cx)
}
}
#[cfg(test)]
mod tests {
use static_assertions::assert_impl_all;
use super::*;
use crate::{http::header, test::TestResponse};
assert_impl_all!(ResponseBody<()>: Unpin);
#[actix_rt::test]
async fn read_body() {
let mut req = TestResponse::with_header((header::CONTENT_LENGTH, "xxxx")).finish();
match req.body().await.err().unwrap() {
PayloadError::UnknownLength => {}
_ => unreachable!("error"),
}
let mut req = TestResponse::with_header((header::CONTENT_LENGTH, "10000000")).finish();
match req.body().await.err().unwrap() {
PayloadError::Overflow => {}
_ => unreachable!("error"),
}
let mut req = TestResponse::default()
.set_payload(Bytes::from_static(b"test"))
.finish();
assert_eq!(req.body().await.ok().unwrap(), Bytes::from_static(b"test"));
let mut req = TestResponse::default()
.set_payload(Bytes::from_static(b"11111111111111"))
.finish();
match req.body().limit(5).await.err().unwrap() {
PayloadError::Overflow => {}
_ => unreachable!("error"),
}
}
}

22
awc/src/sender.rs
View file

@ -8,7 +8,7 @@ use std::{
};
use actix_http::{
body::BodyStream,
body::{BodyStream, MessageBody},
error::HttpError,
header::{self, HeaderMap, HeaderName, TryIntoHeaderValue},
RequestHead, RequestHeadType,
@ -189,15 +189,17 @@ impl RequestSender {
body: B,
) -> SendClientRequest
where
B: Into<AnyBody>,
B: MessageBody + 'static,
{
let req = match self {
RequestSender::Owned(head) => {
ConnectRequest::Client(RequestHeadType::Owned(head), body.into(), addr)
}
RequestSender::Owned(head) => ConnectRequest::Client(
RequestHeadType::Owned(head),
AnyBody::from_message_body(body).into_boxed(),
addr,
),
RequestSender::Rc(head, extra_headers) => ConnectRequest::Client(
RequestHeadType::Rc(head, extra_headers),
body.into(),
AnyBody::from_message_body(body).into_boxed(),
addr,
),
};
@ -229,9 +231,7 @@ impl RequestSender {
response_decompress,
timeout,
config,
AnyBody::Bytes {
body: Bytes::from(body),
},
AnyBody::from_message_body(body.into_bytes()),
)
}
@ -260,9 +260,7 @@ impl RequestSender {
response_decompress,
timeout,
config,
AnyBody::Bytes {
body: Bytes::from(body),
},
AnyBody::from_message_body(body.into_bytes()),
)
}

3
awc/src/ws.rs
View file

@ -42,8 +42,7 @@ use crate::{
header::{self, HeaderName, HeaderValue, TryIntoHeaderValue, AUTHORIZATION},
ConnectionType, Method, StatusCode, Uri, Version,
},
response::ClientResponse,
ClientConfig,
ClientConfig, ClientResponse,
};
#[cfg(feature = "cookies")]

12
src/guard.rs
View file

@ -270,13 +270,11 @@ impl Guard for HeaderGuard {
/// ```
/// use actix_web::{web, guard::Host, App, HttpResponse};
///
/// fn main() {
/// App::new().service(
/// web::resource("/index.html")
/// .guard(Host("www.rust-lang.org"))
/// .to(|| HttpResponse::MethodNotAllowed())
/// );
/// }
/// App::new().service(
/// web::resource("/index.html")
/// .guard(Host("www.rust-lang.org"))
/// .to(|| HttpResponse::MethodNotAllowed())
/// );
/// ```
pub fn Host<H: AsRef<str>>(host: H) -> HostGuard {
HostGuard(host.as_ref().to_string(), None)