use std::sync::{LazyLock, OnceLock};use std::{any::type_name, borrow::Cow, mem, pin::Pin, task::Poll, time::Duration}; use anyhow::anyhow;use bytes::{BufMut, Bytes, BytesMut};use futures::{AsyncRead, TryStreamExt as _};use http_client::{http, RedirectPolicy};use regex::Regex;use reqwest::{ header::{HeaderMap, HeaderValue}, redirect,};use smol::future::FutureExt; const DEFAULT_CAPACITY: usize = 4096;static RUNTIME: OnceLock<tokio::runtime::Runtime> = OnceLock::new();static REDACT_REGEX: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"key=[^&]+").unwrap()); pub struct ReqwestClient { client: reqwest::Client, proxy: Option<http::Uri>, handle: tokio::runtime::Handle,} impl ReqwestClient { fn builder() -> reqwest::ClientBuilder { reqwest::Client::builder() .use_rustls_tls() .connect_timeout(Duration::from_secs(10)) } pub fn new() -> Self { Self::builder() .build() .expect("Failed to initialize HTTP client") .into() } pub fn user_agent(agent: &str) -> anyhow::Result<Self> { let mut map = HeaderMap::new(); map.insert(http::header::USER_AGENT, HeaderValue::from_str(agent)?); let client = Self::builder().default_headers(map).build()?; Ok(client.into()) } pub fn proxy_and_user_agent(proxy: Option<http::Uri>, agent: &str) -> anyhow::Result<Self> { let mut map = HeaderMap::new(); map.insert(http::header::USER_AGENT, HeaderValue::from_str(agent)?); let mut client = Self::builder().default_headers(map); if let Some(proxy) = proxy.clone().and_then(|proxy_uri| { reqwest::Proxy::all(proxy_uri.to_string()) .inspect_err(|e| log::error!("Failed to parse proxy URI {}: {}", proxy_uri, e)) .ok() }) { client = client.proxy(proxy); } let client = client .use_preconfigured_tls(http_client::tls_config()) .build()?; let mut client: ReqwestClient = client.into(); client.proxy = proxy; Ok(client) }} impl From<reqwest::Client> for ReqwestClient { fn from(client: reqwest::Client) -> Self { let handle = tokio::runtime::Handle::try_current().unwrap_or_else(|_| { log::debug!("no tokio runtime found, creating one for Reqwest..."); let runtime = RUNTIME.get_or_init(|| { tokio::runtime::Builder::new_multi_thread() // Since we now have two executors, let's try to keep our footprint small .worker_threads(1) .enable_all() .build() .expect("Failed to initialize HTTP client") }); runtime.handle().clone() }); Self { client, handle, proxy: None, } }} // This struct is essentially a re-implementation of// https://docs.rs/tokio-util/0.7.12/tokio_util/io/struct.ReaderStream.html// except outside of Tokio's aegisstruct StreamReader { reader: Option<Pin<Box<dyn futures::AsyncRead + Send + Sync>>>, buf: BytesMut, capacity: usize,} impl StreamReader { fn new(reader: Pin<Box<dyn futures::AsyncRead + Send + Sync>>) -> Self { Self { reader: Some(reader), buf: BytesMut::new(), capacity: DEFAULT_CAPACITY, } }} impl futures::Stream for StreamReader { type Item = std::io::Result<Bytes>; fn poll_next( mut self: Pin<&mut Self>, cx: &mut std::task::Context<'_>, ) -> Poll<Option<Self::Item>> { let mut this = self.as_mut(); let mut reader = match this.reader.take() { Some(r) => r, None => return Poll::Ready(None), }; if this.buf.capacity() == 0 { let capacity = this.capacity; this.buf.reserve(capacity); } match poll_read_buf(&mut reader, cx, &mut this.buf) { Poll::Pending => Poll::Pending, Poll::Ready(Err(err)) => { self.reader = None; Poll::Ready(Some(Err(err))) } Poll::Ready(Ok(0)) => { self.reader = None; Poll::Ready(None) } Poll::Ready(Ok(_)) => { let chunk = this.buf.split(); self.reader = Some(reader); Poll::Ready(Some(Ok(chunk.freeze()))) } } }} /// Implementation from <https://docs.rs/tokio-util/0.7.12/src/tokio_util/util/poll_buf.rs.html>/// Specialized for this use casepub fn poll_read_buf( io: &mut Pin<Box<dyn futures::AsyncRead + Send + Sync>>, cx: &mut std::task::Context<'_>, buf: &mut BytesMut,) -> Poll<std::io::Result<usize>> { if !buf.has_remaining_mut() { return Poll::Ready(Ok(0)); } let n = { let dst = buf.chunk_mut(); // Safety: `chunk_mut()` returns a `&mut UninitSlice`, and `UninitSlice` is a // transparent wrapper around `[MaybeUninit<u8>]`. let dst = unsafe { &mut *(dst as *mut _ as *mut [std::mem::MaybeUninit<u8>]) }; let mut buf = tokio::io::ReadBuf::uninit(dst); let ptr = buf.filled().as_ptr(); let unfilled_portion = buf.initialize_unfilled(); // SAFETY: Pin projection let io_pin = unsafe { Pin::new_unchecked(io) }; std::task::ready!(io_pin.poll_read(cx, unfilled_portion)?); // Ensure the pointer does not change from under us assert_eq!(ptr, buf.filled().as_ptr()); buf.filled().len() }; // Safety: This is guaranteed to be the number of initialized (and read) // bytes due to the invariants provided by `ReadBuf::filled`. unsafe { buf.advance_mut(n); } Poll::Ready(Ok(n))} fn redact_error(mut error: reqwest::Error) -> reqwest::Error { if let Some(url) = error.url_mut() { if let Some(query) = url.query() { if let Cow::Owned(redacted) = REDACT_REGEX.replace_all(query, "key=REDACTED") { url.set_query(Some(redacted.as_str())); } } } error} impl http_client::HttpClient for ReqwestClient { fn proxy(&self) -> Option<&http::Uri> { self.proxy.as_ref() } fn type_name(&self) -> &'static str { type_name::<Self>() } fn send( &self, req: http::Request<http_client::AsyncBody>, ) -> futures::future::BoxFuture< 'static, Result<http_client::Response<http_client::AsyncBody>, anyhow::Error>, > { let (parts, body) = req.into_parts(); let mut request = self.client.request(parts.method, parts.uri.to_string()); request = request.headers(parts.headers); if let Some(redirect_policy) = parts.extensions.get::<RedirectPolicy>() { request = request.redirect_policy(match redirect_policy { RedirectPolicy::NoFollow => redirect::Policy::none(), RedirectPolicy::FollowLimit(limit) => redirect::Policy::limited(*limit as usize), RedirectPolicy::FollowAll => redirect::Policy::limited(100), }); } let request = request.body(match body.0 { http_client::Inner::Empty => reqwest::Body::default(), http_client::Inner::Bytes(cursor) => cursor.into_inner().into(), http_client::Inner::AsyncReader(stream) => { reqwest::Body::wrap_stream(StreamReader::new(stream)) } }); let handle = self.handle.clone(); async move { let mut response = handle .spawn(async { request.send().await }) .await? .map_err(redact_error)?; let headers = mem::take(response.headers_mut()); let mut builder = http::Response::builder() .status(response.status().as_u16()) .version(response.version()); *builder.headers_mut().unwrap() = headers; let bytes = response .bytes_stream() .map_err(|e| futures::io::Error::new(futures::io::ErrorKind::Other, e)) .into_async_read(); let body = http_client::AsyncBody::from_reader(bytes); builder.body(body).map_err(|e| anyhow!(e)) } .boxed() }} #[cfg(test)]mod tests { use http_client::{http, HttpClient}; use crate::ReqwestClient; #[test] fn test_proxy_uri() { let client = ReqwestClient::new(); assert_eq!(client.proxy(), None); let proxy = http::Uri::from_static("http://localhost:10809"); let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap(); assert_eq!(client.proxy(), Some(&proxy)); let proxy = http::Uri::from_static("https://localhost:10809"); let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap(); assert_eq!(client.proxy(), Some(&proxy)); let proxy = http::Uri::from_static("socks4://localhost:10808"); let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap(); assert_eq!(client.proxy(), Some(&proxy)); let proxy = http::Uri::from_static("socks4a://localhost:10808"); let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap(); assert_eq!(client.proxy(), Some(&proxy)); let proxy = http::Uri::from_static("socks5://localhost:10808"); let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap(); assert_eq!(client.proxy(), Some(&proxy)); let proxy = http::Uri::from_static("socks5h://localhost:10808"); let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap(); assert_eq!(client.proxy(), Some(&proxy)); } #[test] #[should_panic] fn test_invalid_proxy_uri() { let proxy = http::Uri::from_static("file:///etc/hosts"); ReqwestClient::proxy_and_user_agent(Some(proxy), "test").unwrap(); }}
use std::sync::{LazyLock, OnceLock};
use std::{any::type_name, borrow::Cow, mem, pin::Pin, task::Poll, time::Duration};
use anyhow::anyhow;
use bytes::{BufMut, Bytes, BytesMut};
use futures::{AsyncRead, TryStreamExt as _};
use http_client::{http, RedirectPolicy};
use regex::Regex;
use reqwest::{
header::{HeaderMap, HeaderValue},
redirect,
};
use smol::future::FutureExt;
const DEFAULT_CAPACITY: usize = 4096;
static RUNTIME: OnceLock<tokio::runtime::Runtime> = OnceLock::new();
static REDACT_REGEX: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"key=[^&]+").unwrap());
pub struct ReqwestClient {
client: reqwest::Client,
proxy: Option<http::Uri>,
handle: tokio::runtime::Handle,
}
impl ReqwestClient {
fn builder() -> reqwest::ClientBuilder {
reqwest::Client::builder()
.use_rustls_tls()
.connect_timeout(Duration::from_secs(10))
}
pub fn new() -> Self {
Self::builder()
.build()
.expect("Failed to initialize HTTP client")
.into()
}
pub fn user_agent(agent: &str) -> anyhow::Result<Self> {
let mut map = HeaderMap::new();
map.insert(http::header::USER_AGENT, HeaderValue::from_str(agent)?);
let client = Self::builder().default_headers(map).build()?;
Ok(client.into())
}
pub fn proxy_and_user_agent(proxy: Option<http::Uri>, agent: &str) -> anyhow::Result<Self> {
let mut map = HeaderMap::new();
map.insert(http::header::USER_AGENT, HeaderValue::from_str(agent)?);
let mut client = Self::builder().default_headers(map);
if let Some(proxy) = proxy.clone().and_then(|proxy_uri| {
reqwest::Proxy::all(proxy_uri.to_string())
.inspect_err(|e| log::error!("Failed to parse proxy URI {}: {}", proxy_uri, e))
.ok()
}) {
client = client.proxy(proxy);
}
let client = client
.use_preconfigured_tls(http_client::tls_config())
.build()?;
let mut client: ReqwestClient = client.into();
client.proxy = proxy;
Ok(client)
}
}
impl From<reqwest::Client> for ReqwestClient {
fn from(client: reqwest::Client) -> Self {
let handle = tokio::runtime::Handle::try_current().unwrap_or_else(|_| {
log::debug!("no tokio runtime found, creating one for Reqwest...");
let runtime = RUNTIME.get_or_init(|| {
tokio::runtime::Builder::new_multi_thread()
// Since we now have two executors, let's try to keep our footprint small
.worker_threads(1)
.enable_all()
.build()
.expect("Failed to initialize HTTP client")
});
runtime.handle().clone()
});
Self {
client,
handle,
proxy: None,
}
}
}
// This struct is essentially a re-implementation of
// https://docs.rs/tokio-util/0.7.12/tokio_util/io/struct.ReaderStream.html
// except outside of Tokio's aegis
struct StreamReader {
reader: Option<Pin<Box<dyn futures::AsyncRead + Send + Sync>>>,
buf: BytesMut,
capacity: usize,
}
impl StreamReader {
fn new(reader: Pin<Box<dyn futures::AsyncRead + Send + Sync>>) -> Self {
Self {
reader: Some(reader),
buf: BytesMut::new(),
capacity: DEFAULT_CAPACITY,
}
}
}
impl futures::Stream for StreamReader {
type Item = std::io::Result<Bytes>;
fn poll_next(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> Poll<Option<Self::Item>> {
let mut this = self.as_mut();
let mut reader = match this.reader.take() {
Some(r) => r,
None => return Poll::Ready(None),
};
if this.buf.capacity() == 0 {
let capacity = this.capacity;
this.buf.reserve(capacity);
}
match poll_read_buf(&mut reader, cx, &mut this.buf) {
Poll::Pending => Poll::Pending,
Poll::Ready(Err(err)) => {
self.reader = None;
Poll::Ready(Some(Err(err)))
}
Poll::Ready(Ok(0)) => {
self.reader = None;
Poll::Ready(None)
}
Poll::Ready(Ok(_)) => {
let chunk = this.buf.split();
self.reader = Some(reader);
Poll::Ready(Some(Ok(chunk.freeze())))
}
}
}
}
/// Implementation from <https://docs.rs/tokio-util/0.7.12/src/tokio_util/util/poll_buf.rs.html>
/// Specialized for this use case
pub fn poll_read_buf(
io: &mut Pin<Box<dyn futures::AsyncRead + Send + Sync>>,
cx: &mut std::task::Context<'_>,
buf: &mut BytesMut,
) -> Poll<std::io::Result<usize>> {
if !buf.has_remaining_mut() {
return Poll::Ready(Ok(0));
}
let n = {
let dst = buf.chunk_mut();
// Safety: `chunk_mut()` returns a `&mut UninitSlice`, and `UninitSlice` is a
// transparent wrapper around `[MaybeUninit<u8>]`.
let dst = unsafe { &mut *(dst as *mut _ as *mut [std::mem::MaybeUninit<u8>]) };
let mut buf = tokio::io::ReadBuf::uninit(dst);
let ptr = buf.filled().as_ptr();
let unfilled_portion = buf.initialize_unfilled();
// SAFETY: Pin projection
let io_pin = unsafe { Pin::new_unchecked(io) };
std::task::ready!(io_pin.poll_read(cx, unfilled_portion)?);
// Ensure the pointer does not change from under us
assert_eq!(ptr, buf.filled().as_ptr());
buf.filled().len()
};
// Safety: This is guaranteed to be the number of initialized (and read)
// bytes due to the invariants provided by `ReadBuf::filled`.
unsafe {
buf.advance_mut(n);
}
Poll::Ready(Ok(n))
}
fn redact_error(mut error: reqwest::Error) -> reqwest::Error {
if let Some(url) = error.url_mut() {
if let Some(query) = url.query() {
if let Cow::Owned(redacted) = REDACT_REGEX.replace_all(query, "key=REDACTED") {
url.set_query(Some(redacted.as_str()));
}
}
}
error
}
impl http_client::HttpClient for ReqwestClient {
fn proxy(&self) -> Option<&http::Uri> {
self.proxy.as_ref()
}
fn type_name(&self) -> &'static str {
type_name::<Self>()
}
fn send(
&self,
req: http::Request<http_client::AsyncBody>,
) -> futures::future::BoxFuture<
'static,
Result<http_client::Response<http_client::AsyncBody>, anyhow::Error>,
> {
let (parts, body) = req.into_parts();
let mut request = self.client.request(parts.method, parts.uri.to_string());
request = request.headers(parts.headers);
if let Some(redirect_policy) = parts.extensions.get::<RedirectPolicy>() {
request = request.redirect_policy(match redirect_policy {
RedirectPolicy::NoFollow => redirect::Policy::none(),
RedirectPolicy::FollowLimit(limit) => redirect::Policy::limited(*limit as usize),
RedirectPolicy::FollowAll => redirect::Policy::limited(100),
});
}
let request = request.body(match body.0 {
http_client::Inner::Empty => reqwest::Body::default(),
http_client::Inner::Bytes(cursor) => cursor.into_inner().into(),
http_client::Inner::AsyncReader(stream) => {
reqwest::Body::wrap_stream(StreamReader::new(stream))
}
});
let handle = self.handle.clone();
async move {
let mut response = handle
.spawn(async { request.send().await })
.await?
.map_err(redact_error)?;
let headers = mem::take(response.headers_mut());
let mut builder = http::Response::builder()
.status(response.status().as_u16())
.version(response.version());
*builder.headers_mut().unwrap() = headers;
let bytes = response
.bytes_stream()
.map_err(|e| futures::io::Error::new(futures::io::ErrorKind::Other, e))
.into_async_read();
let body = http_client::AsyncBody::from_reader(bytes);
builder.body(body).map_err(|e| anyhow!(e))
}
.boxed()
}
}
#[cfg(test)]
mod tests {
use http_client::{http, HttpClient};
use crate::ReqwestClient;
#[test]
fn test_proxy_uri() {
let client = ReqwestClient::new();
assert_eq!(client.proxy(), None);
let proxy = http::Uri::from_static("http://localhost:10809");
let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
assert_eq!(client.proxy(), Some(&proxy));
let proxy = http::Uri::from_static("https://localhost:10809");
let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
assert_eq!(client.proxy(), Some(&proxy));
let proxy = http::Uri::from_static("socks4://localhost:10808");
let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
assert_eq!(client.proxy(), Some(&proxy));
let proxy = http::Uri::from_static("socks4a://localhost:10808");
let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
assert_eq!(client.proxy(), Some(&proxy));
let proxy = http::Uri::from_static("socks5://localhost:10808");
let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
assert_eq!(client.proxy(), Some(&proxy));
let proxy = http::Uri::from_static("socks5h://localhost:10808");
let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
assert_eq!(client.proxy(), Some(&proxy));
}
#[test]
#[should_panic]
fn test_invalid_proxy_uri() {
let proxy = http::Uri::from_static("file:///etc/hosts");
ReqwestClient::proxy_and_user_agent(Some(proxy), "test").unwrap();
}
}