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"registry+https://github.com/rust-lang/crates.io-index" +checksum = "504a2476202769977a040c6364301a3f65d0cc9e3fb08600b2bda150a0488316" diff --git a/proxy/cats/Cargo.toml b/proxy/cats/Cargo.toml new file mode 100644 index 0000000..78a44e1 --- /dev/null +++ b/proxy/cats/Cargo.toml @@ -0,0 +1,13 @@ +[package] +name = "cats" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +hyper = { version = "0.14", features = ["full"] } +tokio = { version = "1", features = ["full"] } +lazy_static = "1.4" +unicase = "2.6" +hyper-tls = "0.5.0" diff --git a/proxy/cats/README.md b/proxy/cats/README.md new file mode 100644 index 0000000..00faada --- /dev/null +++ b/proxy/cats/README.md @@ -0,0 +1,3 @@ +# cats - cache .ts + +> barebones caching reverse proxy for HLS diff --git a/proxy/cats/src/hyper_reverse_proxy/LICENSE b/proxy/cats/src/hyper_reverse_proxy/LICENSE new file mode 100644 index 0000000..57bc88a --- /dev/null +++ b/proxy/cats/src/hyper_reverse_proxy/LICENSE @@ -0,0 +1,202 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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A simple reverse proxy, to be used with [Hyper]. +//! +//! The implementation ensures that [Hop-by-hop headers] are stripped correctly in both directions, +//! and adds the client's IP address to a comma-space-separated list of forwarding addresses in the +//! `X-Forwarded-For` header. +//! +//! The implementation is based on Go's [`httputil.ReverseProxy`]. +//! +//! [Hyper]: http://hyper.rs/ +//! [Hop-by-hop headers]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html +//! [`httputil.ReverseProxy`]: https://golang.org/pkg/net/http/httputil/#ReverseProxy +//! +//! # Example +//! +//! Add these dependencies to your `Cargo.toml` file. +//! +//! ```toml +//! [dependencies] +//! hyper-reverse-proxy = "0.5" +//! hyper = { version = "0.14", features = ["full"] } +//! tokio = { version = "1", features = ["full"] } +//! ``` +//! +//! The following example will set up a reverse proxy listening on `127.0.0.1:13900`, +//! and will proxy these calls: +//! +//! * `"/target/first"` will be proxied to `http://127.0.0.1:13901` +//! +//! * `"/target/second"` will be proxied to `http://127.0.0.1:13902` +//! +//! * All other URLs will be handled by `debug_request` function, that will display request information. +//! +//! ```rust,no_run +//! use hyper::server::conn::AddrStream; +//! use hyper::{Body, Request, Response, Server, StatusCode}; +//! use hyper::service::{service_fn, make_service_fn}; +//! use std::{convert::Infallible, net::SocketAddr}; +//! use std::net::IpAddr; +//! +//! fn debug_request(req: Request) -> Result, Infallible> { +//! let body_str = format!("{:?}", req); +//! Ok(Response::new(Body::from(body_str))) +//! } +//! +//! async fn handle(client_ip: IpAddr, req: Request) -> Result, Infallible> { +//! if req.uri().path().starts_with("/target/first") { +//! // will forward requests to port 13901 +//! match hyper_reverse_proxy::call(client_ip, "http://127.0.0.1:13901", req).await { +//! Ok(response) => {Ok(response)} +//! Err(_error) => {Ok(Response::builder() +//! .status(StatusCode::INTERNAL_SERVER_ERROR) +//! .body(Body::empty()) +//! .unwrap())} +//! } +//! } else if req.uri().path().starts_with("/target/second") { +//! // will forward requests to port 13902 +//! match hyper_reverse_proxy::call(client_ip, "http://127.0.0.1:13902", req).await { +//! Ok(response) => {Ok(response)} +//! Err(_error) => {Ok(Response::builder() +//! .status(StatusCode::INTERNAL_SERVER_ERROR) +//! .body(Body::empty()) +//! .unwrap())} +//! } +//! } else { +//! debug_request(req) +//! } +//! } +//! +//! #[tokio::main] +//! async fn main() { +//! let bind_addr = "127.0.0.1:8000"; +//! let addr:SocketAddr = bind_addr.parse().expect("Could not parse ip:port."); +//! +//! let make_svc = make_service_fn(|conn: &AddrStream| { +//! let remote_addr = conn.remote_addr().ip(); +//! async move { +//! Ok::<_, Infallible>(service_fn(move |req| handle(remote_addr, req))) +//! } +//! }); +//! +//! let server = Server::bind(&addr).serve(make_svc); +//! +//! println!("Running server on {:?}", addr); +//! +//! if let Err(e) = server.await { +//! eprintln!("server error: {}", e); +//! } +//! } +//! ``` +//! +//! # Vendoring +//! This dependency has been vendored from https://github.com/felipenoris/hyper-reverse-proxy. +//! It has been modified to add TLS support using hyper_tls, and to update the +//! Host header to match the upstream host. + +use hyper::header::{HeaderMap, HeaderValue}; +use hyper::http::header::{InvalidHeaderValue, ToStrError}; +use hyper::http::uri::InvalidUri; +use hyper::{Body, Client, Error, Request, Response, Uri}; +use hyper_tls::HttpsConnector; +use lazy_static::lazy_static; +use std::net::IpAddr; +use std::str::FromStr; + +#[derive(Debug)] +pub enum ProxyError { + InvalidUri(InvalidUri), + HyperError(Error), + ForwardHeaderError, +} + +impl From for ProxyError { + fn from(err: Error) -> ProxyError { + ProxyError::HyperError(err) + } +} + +impl From for ProxyError { + fn from(err: InvalidUri) -> ProxyError { + ProxyError::InvalidUri(err) + } +} + +impl From for ProxyError { + fn from(_err: ToStrError) -> ProxyError { + ProxyError::ForwardHeaderError + } +} + +impl From for ProxyError { + fn from(_err: InvalidHeaderValue) -> ProxyError { + ProxyError::ForwardHeaderError + } +} + +fn is_hop_header(name: &str) -> bool { + use unicase::Ascii; + + // A list of the headers, using `unicase` to help us compare without + // worrying about the case, and `lazy_static!` to prevent reallocation + // of the vector. + lazy_static! { + static ref HOP_HEADERS: Vec> = vec![ + Ascii::new("Connection"), + Ascii::new("Keep-Alive"), + Ascii::new("Proxy-Authenticate"), + Ascii::new("Proxy-Authorization"), + Ascii::new("Te"), + Ascii::new("Trailers"), + Ascii::new("Transfer-Encoding"), + Ascii::new("Upgrade"), + Ascii::new("Host"), + ]; + } + + HOP_HEADERS.iter().any(|h| h == &name) +} + +/// Returns a clone of the headers without the [hop-by-hop headers]. +/// +/// [hop-by-hop headers]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html +fn remove_hop_headers(headers: &HeaderMap) -> HeaderMap { + let mut result = HeaderMap::new(); + for (k, v) in headers.iter() { + if !is_hop_header(k.as_str()) { + result.insert(k.clone(), v.clone()); + } + } + result +} + +fn create_proxied_response(mut response: Response) -> Response { + *response.headers_mut() = remove_hop_headers(response.headers()); + response +} + +fn forward_uri(forward_url: &str, req: &Request) -> Result { + let forward_uri = match req.uri().query() { + Some(query) => format!("{}{}?{}", forward_url, req.uri().path(), query), + None => format!("{}{}", forward_url, req.uri().path()), + }; + + Uri::from_str(forward_uri.as_str()) +} + +fn create_proxied_request( + client_ip: IpAddr, + forward_url: &str, + mut request: Request, +) -> Result, ProxyError> { + *request.headers_mut() = remove_hop_headers(request.headers()); + *request.uri_mut() = forward_uri(forward_url, &request)?; + + let x_forwarded_for_header_name = "x-forwarded-for"; + + // Add forwarding information in the headers + match request.headers_mut().entry(x_forwarded_for_header_name) { + hyper::header::Entry::Vacant(entry) => { + entry.insert(client_ip.to_string().parse()?); + } + + hyper::header::Entry::Occupied(mut entry) => { + let addr = format!("{}, {}", entry.get().to_str()?, client_ip); + entry.insert(addr.parse()?); + } + } + + // Update the Host header + let host = request + .uri() + .host() + .ok_or(ProxyError::ForwardHeaderError)? + .parse()?; + request.headers_mut().entry("host").or_insert(host); + + Ok(request) +} + +pub async fn call( + client_ip: IpAddr, + forward_uri: &str, + request: Request, +) -> Result, ProxyError> { + let proxied_request = create_proxied_request(client_ip, &forward_uri, request)?; + + let https = HttpsConnector::new(); + let client = Client::builder().build::<_, hyper::Body>(https); + let response = client.request(proxied_request).await?; + let proxied_response = create_proxied_response(response); + Ok(proxied_response) +} diff --git a/proxy/cats/src/main.rs b/proxy/cats/src/main.rs new file mode 100644 index 0000000..a61c816 --- /dev/null +++ b/proxy/cats/src/main.rs @@ -0,0 +1,51 @@ +use hyper::server::conn::AddrStream; +use hyper::service::{make_service_fn, service_fn}; +use hyper::{Body, Request, Response, Server, StatusCode}; +use std::{ + convert::Infallible, + net::{IpAddr, SocketAddr}, +}; + +mod hyper_reverse_proxy; + +async fn handle(client_ip: IpAddr, req: Request) -> Result, Infallible> { + println!("{} {} {}", client_ip, req.method(), req.uri()); + + match hyper_reverse_proxy::call(client_ip, "https://dl.kitsu.red", req).await { + Ok(response) => Ok(response), + Err(_error) => { + eprintln!("Error: {:#?}", _error); + Ok(Response::builder() + .status(StatusCode::INTERNAL_SERVER_ERROR) + .body(Body::from("Internal Server Error")) + .unwrap()) + } + } +} + +async fn shutdown_signal() { + // Wait for the CTRL+C signal + tokio::signal::ctrl_c() + .await + .expect("failed to install CTRL+C signal handler"); +} + +#[tokio::main] +async fn main() { + let addr = SocketAddr::from(([127, 0, 0, 1], 3000)); + + let make_svc = make_service_fn(|socket: &AddrStream| { + let remote_addr = socket.remote_addr().ip(); + async move { Ok::<_, Infallible>(service_fn(move |req| handle(remote_addr, req))) } + }); + + let server = Server::bind(&addr) + .serve(make_svc) + .with_graceful_shutdown(shutdown_signal()); + + println!("Listening on http://{}", addr); + if let Err(e) = server.await { + eprintln!("server error: {}", e); + } + println!("Bye!"); +}