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refactor: separeted forwarder definition for more flexibility

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Jun Kurihara 2023-08-08 17:59:20 +09:00
commit 43b004cf6e
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5 changed files with 84 additions and 15 deletions
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5
config-example.toml
View file

@ -56,7 +56,10 @@ upstream = [
{ location = 'www.yahoo.co.jp', tls = true },
]
load_balance = "round_robin" # or "random" or "sticky" (sticky session) or "none" (fix to the first one, default)
upstream_options = ["override_host", "convert_https_to_2"]
upstream_options = [
"override_host",
"force_http2_upstream", # mutually exclusive with "force_http11_upstream"
]
# Non-default destination in "localhost" app, which is routed by "path"
[[apps.localhost.reverse_proxy]]

58
rpxy-lib/src/handler/forwarder.rs Normal file
View file

@ -0,0 +1,58 @@
use crate::error::RpxyError;
use async_trait::async_trait;
use derive_builder::Builder;
use hyper::{
body::{Body, HttpBody},
client::{connect::Connect, HttpConnector},
Client, Request, Response,
};
use hyper_rustls::HttpsConnector;
#[async_trait]
/// Definition of the forwarder that simply forward requests from downstream client to upstream app servers.
pub trait ForwardRequest<B> {
type Error;
async fn request(&self, req: Request<B>) -> Result<Response<Body>, Self::Error>;
}
#[derive(Builder, Clone)]
/// Forwarder struct
pub struct Forwarder<C, B = Body>
where
C: Connect + Clone + Sync + Send + 'static,
{
// TODO: need `h2c` or http/2-only client separately
inner: Client<C, B>,
}
#[async_trait]
impl<C, B> ForwardRequest<B> for Forwarder<C, B>
where
B: HttpBody + Send + 'static,
B::Data: Send,
B::Error: Into<Box<dyn std::error::Error + Send + Sync>>,
C: Connect + Clone + Sync + Send + 'static,
{
type Error = RpxyError;
async fn request(&self, req: Request<B>) -> Result<Response<Body>, Self::Error> {
// TODO:
// TODO: Implement here a client that handles `h2c` requests
// TODO:
self.inner.request(req).await.map_err(RpxyError::Hyper)
}
}
impl Forwarder<HttpsConnector<HttpConnector>, Body> {
pub async fn new() -> Self {
// let connector = TrustDnsResolver::default().into_rustls_webpki_https_connector();
let connector = hyper_rustls::HttpsConnectorBuilder::new()
.with_webpki_roots()
.https_or_http()
.enable_http1()
.enable_http2()
.build();
let inner = Client::builder().build::<_, Body>(connector);
Self { inner }
}
}

12
rpxy-lib/src/handler/handler_main.rs
View file

@ -1,5 +1,11 @@
// Highly motivated by https://github.com/felipenoris/hyper-reverse-proxy
use super::{utils_headers::*, utils_request::*, utils_synth_response::*, HandlerContext};
use super::{
forwarder::{ForwardRequest, Forwarder},
utils_headers::*,
utils_request::*,
utils_synth_response::*,
HandlerContext,
};
use crate::{
backend::{Backend, UpstreamGroup},
certs::CryptoSource,
@ -14,7 +20,7 @@ use hyper::{
client::connect::Connect,
header::{self, HeaderValue},
http::uri::Scheme,
Body, Client, Request, Response, StatusCode, Uri, Version,
Body, Request, Response, StatusCode, Uri, Version,
};
use std::{net::SocketAddr, sync::Arc};
use tokio::{io::copy_bidirectional, time::timeout};
@ -27,7 +33,7 @@ where
T: Connect + Clone + Sync + Send + 'static,
U: CryptoSource + Clone,
{
forwarder: Arc<Client<T>>,
forwarder: Arc<Forwarder<T>>,
globals: Arc<Globals<U>>,
}

6
rpxy-lib/src/handler/mod.rs
View file

@ -1,3 +1,4 @@
mod forwarder;
mod handler_main;
mod utils_headers;
mod utils_request;
@ -5,7 +6,10 @@ mod utils_synth_response;
#[cfg(feature = "sticky-cookie")]
use crate::backend::LbContext;
pub use handler_main::{HttpMessageHandler, HttpMessageHandlerBuilder, HttpMessageHandlerBuilderError};
pub use {
forwarder::Forwarder,
handler_main::{HttpMessageHandler, HttpMessageHandlerBuilder, HttpMessageHandlerBuilderError},
};
#[allow(dead_code)]
#[derive(Debug)]

18
rpxy-lib/src/lib.rs
View file

@ -8,9 +8,14 @@ mod log;
mod proxy;
mod utils;
use crate::{error::*, globals::Globals, handler::HttpMessageHandlerBuilder, log::*, proxy::ProxyBuilder};
use crate::{
error::*,
globals::Globals,
handler::{Forwarder, HttpMessageHandlerBuilder},
log::*,
proxy::ProxyBuilder,
};
use futures::future::select_all;
use hyper::Client;
// use hyper_trust_dns::TrustDnsResolver;
use std::sync::Arc;
@ -62,17 +67,10 @@ where
request_count: Default::default(),
runtime_handle: runtime_handle.clone(),
});
// let connector = TrustDnsResolver::default().into_rustls_webpki_https_connector();
let connector = hyper_rustls::HttpsConnectorBuilder::new()
.with_webpki_roots()
.https_or_http()
.enable_http1()
.enable_http2()
.build();
// TODO: HTTP2 only client is needed for http2 cleartext case
let msg_handler = HttpMessageHandlerBuilder::default()
.forwarder(Arc::new(Client::builder().build::<_, hyper::Body>(connector)))
.forwarder(Arc::new(Forwarder::new().await))
.globals(globals.clone())
.build()?;