change src structure
This commit is contained in:
Jun Kurihara
parent
6b87e669e5
commit
09c6c4c102
9 changed files with 5 additions and 5 deletions
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@ -1,300 +0,0 @@
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// Highly motivated by https://github.com/felipenoris/hyper-reverse-proxy
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use super::{utils_headers::*, utils_request::*, utils_response::ResLog, utils_synth_response::*};
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use crate::{
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backend::{ServerNameLC, Upstream},
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error::*,
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globals::Globals,
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log::*,
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};
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use hyper::{
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client::connect::Connect,
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header::{self, HeaderValue},
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http::uri::Scheme,
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Body, Client, Request, Response, StatusCode, Uri, Version,
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};
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use std::{env, net::SocketAddr, sync::Arc};
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use tokio::{io::copy_bidirectional, time::timeout};
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#[derive(Clone)]
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pub struct HttpMessageHandler<T>
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where
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T: Connect + Clone + Sync + Send + 'static,
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{
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pub forwarder: Arc<Client<T>>,
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pub globals: Arc<Globals>,
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}
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impl<T> HttpMessageHandler<T>
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where
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T: Connect + Clone + Sync + Send + 'static,
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{
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fn return_with_error_log(&self, status_code: StatusCode, log_data: &mut MessageLog) -> Result<Response<Body>> {
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log_data.status_code(&status_code).output();
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http_error(status_code)
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}
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pub async fn handle_request(
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self,
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mut req: Request<Body>,
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client_addr: SocketAddr, // アクセス制御用
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listen_addr: SocketAddr,
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tls_enabled: bool,
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tls_server_name: Option<ServerNameLC>,
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) -> Result<Response<Body>> {
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req.log_debug(&client_addr, Some("(from Client)"));
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////////
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let mut log_data = MessageLog::from(&req);
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log_data.client_addr(&client_addr);
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//////
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// Here we start to handle with server_name
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let server_name_bytes = if let Ok(v) = req.parse_host() {
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v.to_ascii_lowercase()
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} else {
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return self.return_with_error_log(StatusCode::BAD_REQUEST, &mut log_data);
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};
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// check consistency of between TLS SNI and HOST/Request URI Line.
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#[allow(clippy::collapsible_if)]
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if tls_enabled && self.globals.sni_consistency {
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if !server_name_bytes.eq_ignore_ascii_case(&tls_server_name.unwrap_or_default()) {
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return self.return_with_error_log(StatusCode::MISDIRECTED_REQUEST, &mut log_data);
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}
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}
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// Find backend application for given server_name, and drop if incoming request is invalid as request.
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let backend = if let Some(be) = self.globals.backends.apps.get(&server_name_bytes) {
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be
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} else if let Some(default_server_name) = &self.globals.backends.default_server_name {
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debug!("Serving by default app");
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self.globals.backends.apps.get(default_server_name).unwrap()
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} else {
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return self.return_with_error_log(StatusCode::SERVICE_UNAVAILABLE, &mut log_data);
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};
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// Redirect to https if !tls_enabled and redirect_to_https is true
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if !tls_enabled && backend.https_redirection.unwrap_or(false) {
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debug!("Redirect to secure connection: {}", &backend.server_name);
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log_data.status_code(&StatusCode::PERMANENT_REDIRECT).output();
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return secure_redirection(&backend.server_name, self.globals.https_port, &req);
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}
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// Find reverse proxy for given path and choose one of upstream host
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// Longest prefix match
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let path = req.uri().path();
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let upstream = if let Some(upstream) = backend.reverse_proxy.get(path) {
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upstream
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} else {
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return self.return_with_error_log(StatusCode::NOT_FOUND, &mut log_data);
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};
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let upstream_scheme_host = if let Some(u) = upstream.get() {
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u
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} else {
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return self.return_with_error_log(StatusCode::SERVICE_UNAVAILABLE, &mut log_data);
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};
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// Upgrade in request header
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let upgrade_in_request = extract_upgrade(req.headers());
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let request_upgraded = req.extensions_mut().remove::<hyper::upgrade::OnUpgrade>();
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// Build request from destination information
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if let Err(e) = self.generate_request_forwarded(
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&client_addr,
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&listen_addr,
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&mut req,
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upstream_scheme_host,
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&upgrade_in_request,
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upstream,
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tls_enabled,
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) {
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error!("Failed to generate destination uri for reverse proxy: {}", e);
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return self.return_with_error_log(StatusCode::SERVICE_UNAVAILABLE, &mut log_data);
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};
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// debug!("Request to be forwarded: {:?}", req_forwarded);
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req.log_debug(&client_addr, Some("(to Backend)"));
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log_data.xff(&req.headers().get("x-forwarded-for"));
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log_data.upstream(&upstream_scheme_host.to_string());
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//////
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// Forward request to
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let mut res_backend = {
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match timeout(self.globals.upstream_timeout, self.forwarder.request(req)).await {
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Err(_) => {
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return self.return_with_error_log(StatusCode::GATEWAY_TIMEOUT, &mut log_data);
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}
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Ok(x) => match x {
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Ok(res) => res,
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Err(e) => {
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error!("Failed to get response from backend: {}", e);
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return self.return_with_error_log(StatusCode::SERVICE_UNAVAILABLE, &mut log_data);
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}
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},
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}
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};
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res_backend.log_debug(&backend.server_name, &client_addr, Some("(from Backend)"));
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// let response_log = res_backend.status().to_string();
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if res_backend.status() != StatusCode::SWITCHING_PROTOCOLS {
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// Generate response to client
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if self.generate_response_forwarded(&mut res_backend).is_ok() {
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// info!("{} => {}", request_log, response_log);
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res_backend.log_debug(&backend.server_name, &client_addr, Some("(to Client)"));
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log_data.status_code(&res_backend.status()).output();
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return Ok(res_backend);
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} else {
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return self.return_with_error_log(StatusCode::INTERNAL_SERVER_ERROR, &mut log_data);
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}
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}
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// Handle StatusCode::SWITCHING_PROTOCOLS in response
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let upgrade_in_response = extract_upgrade(res_backend.headers());
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if if let (Some(u_req), Some(u_res)) = (upgrade_in_request.as_ref(), upgrade_in_response.as_ref()) {
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u_req.to_ascii_lowercase() == u_res.to_ascii_lowercase()
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} else {
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false
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} {
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if let Some(request_upgraded) = request_upgraded {
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let onupgrade = if let Some(onupgrade) = res_backend.extensions_mut().remove::<hyper::upgrade::OnUpgrade>() {
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onupgrade
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} else {
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error!("Response does not have an upgrade extension");
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return self.return_with_error_log(StatusCode::INTERNAL_SERVER_ERROR, &mut log_data);
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};
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self.globals.runtime_handle.spawn(async move {
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let mut response_upgraded = onupgrade.await.map_err(|e| {
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error!("Failed to upgrade response: {}", e);
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anyhow!("Failed to upgrade response: {}", e)
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})?;
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let mut request_upgraded = request_upgraded.await.map_err(|e| {
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error!("Failed to upgrade request: {}", e);
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anyhow!("Failed to upgrade request: {}", e)
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})?;
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copy_bidirectional(&mut response_upgraded, &mut request_upgraded)
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.await
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.map_err(|e| anyhow!("Coping between upgraded connections failed: {}", e))?;
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Ok(()) as Result<()>
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});
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log_data.status_code(&res_backend.status()).output();
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Ok(res_backend)
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} else {
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error!("Request does not have an upgrade extension");
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self.return_with_error_log(StatusCode::BAD_REQUEST, &mut log_data)
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}
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} else {
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error!(
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"Backend tried to switch to protocol {:?} when {:?} was requested",
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upgrade_in_response, upgrade_in_request
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);
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self.return_with_error_log(StatusCode::INTERNAL_SERVER_ERROR, &mut log_data)
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}
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}
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////////////////////////////////////////////////////
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// Functions to generate messages
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fn generate_response_forwarded<B: core::fmt::Debug>(&self, response: &mut Response<B>) -> Result<()> {
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let headers = response.headers_mut();
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remove_connection_header(headers);
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remove_hop_header(headers);
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add_header_entry_overwrite_if_exist(headers, "server", env!("CARGO_PKG_NAME"))?;
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#[cfg(feature = "http3")]
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{
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if self.globals.http3 {
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if let Some(port) = self.globals.https_port {
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add_header_entry_overwrite_if_exist(
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headers,
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header::ALT_SVC.as_str(),
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format!(
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"h3=\":{}\"; ma={}, h3-29=\":{}\"; ma={}",
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port, self.globals.h3_alt_svc_max_age, port, self.globals.h3_alt_svc_max_age
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),
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)?;
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}
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}
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}
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Ok(())
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}
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#[allow(clippy::too_many_arguments)]
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fn generate_request_forwarded<B: core::fmt::Debug>(
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&self,
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client_addr: &SocketAddr,
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listen_addr: &SocketAddr,
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req: &mut Request<B>,
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upstream_scheme_host: &Uri,
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upgrade: &Option<String>,
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upstream: &Upstream,
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tls_enabled: bool,
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) -> Result<()> {
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debug!("Generate request to be forwarded");
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// Add te: trailer if contained in original request
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let contains_te_trailers = {
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if let Some(te) = req.headers().get(header::TE) {
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te.as_bytes()
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.split(|v| v == &b',' || v == &b' ')
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.any(|x| x == "trailers".as_bytes())
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} else {
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false
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}
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};
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let uri = req.uri().to_string();
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let headers = req.headers_mut();
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// delete headers specified in header.connection
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remove_connection_header(headers);
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// delete hop headers including header.connection
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remove_hop_header(headers);
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// X-Forwarded-For
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add_forwarding_header(headers, client_addr, listen_addr, tls_enabled, &uri)?;
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// Add te: trailer if te_trailer
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if contains_te_trailers {
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headers.insert(header::TE, HeaderValue::from_bytes("trailers".as_bytes()).unwrap());
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}
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// add "host" header of original server_name if not exist (default)
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if req.headers().get(header::HOST).is_none() {
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let org_host = req.uri().host().ok_or_else(|| anyhow!("Invalid request"))?.to_owned();
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req
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.headers_mut()
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.insert(header::HOST, HeaderValue::from_str(&org_host)?);
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};
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// apply upstream-specific headers given in upstream_option
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let headers = req.headers_mut();
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apply_upstream_options_to_header(headers, client_addr, upstream_scheme_host, upstream)?;
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// update uri in request
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ensure!(upstream_scheme_host.authority().is_some() && upstream_scheme_host.scheme().is_some());
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let new_uri = Uri::builder()
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.scheme(upstream_scheme_host.scheme().unwrap().as_str())
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.authority(upstream_scheme_host.authority().unwrap().as_str());
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let pq = req.uri().path_and_query();
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*req.uri_mut() = match pq {
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None => new_uri,
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Some(x) => new_uri.path_and_query(x.to_owned()),
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}
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.build()?;
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// upgrade
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if let Some(v) = upgrade {
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req.headers_mut().insert(header::UPGRADE, v.parse()?);
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req
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.headers_mut()
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.insert(header::CONNECTION, HeaderValue::from_str("upgrade")?);
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}
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// Change version to http/1.1 when destination scheme is http
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if req.version() != Version::HTTP_11 && upstream_scheme_host.scheme() == Some(&Scheme::HTTP) {
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*req.version_mut() = Version::HTTP_11;
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} else if req.version() == Version::HTTP_3 {
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debug!("HTTP/3 is currently unsupported for request to upstream. Use HTTP/2.");
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*req.version_mut() = Version::HTTP_2;
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}
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Ok(())
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}
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}
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