proxmox-backup/proxmox-rest-server/src/h2service.rs

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use anyhow::{Error};
use std::collections::HashMap;
use std::pin::Pin;
use std::sync::Arc;
use std::task::{Context, Poll};
use futures::*;
use hyper::{Body, Request, Response, StatusCode};
use proxmox::api::{ApiResponseFuture, HttpError, Router, RpcEnvironment};
use proxmox::http_err;
use crate::{normalize_uri_path, WorkerTask};
use crate::formatter::*;
/// Hyper Service implementation to handle stateful H2 connections.
///
/// We use this kind of service to handle backup protocol
/// connections. State is stored inside the generic ``rpcenv``. Logs
/// goes into the ``WorkerTask`` log.
pub struct H2Service<E> {
router: &'static Router,
rpcenv: E,
worker: Arc<WorkerTask>,
debug: bool,
}
impl <E: RpcEnvironment + Clone> H2Service<E> {
pub fn new(rpcenv: E, worker: Arc<WorkerTask>, router: &'static Router, debug: bool) -> Self {
Self { rpcenv, worker, router, debug }
}
pub fn debug<S: AsRef<str>>(&self, msg: S) {
if self.debug { self.worker.log_message(msg); }
}
fn handle_request(&self, req: Request<Body>) -> ApiResponseFuture {
let (parts, body) = req.into_parts();
let method = parts.method.clone();
let (path, components) = match normalize_uri_path(parts.uri.path()) {
Ok((p,c)) => (p, c),
Err(err) => return future::err(http_err!(BAD_REQUEST, "{}", err)).boxed(),
};
self.debug(format!("{} {}", method, path));
let mut uri_param = HashMap::new();
let formatter = JSON_FORMATTER;
match self.router.find_method(&components, method, &mut uri_param) {
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None => {
let err = http_err!(NOT_FOUND, "Path '{}' not found.", path);
future::ok(formatter.format_error(err)).boxed()
}
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Some(api_method) => {
crate::rest::handle_api_request(
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self.rpcenv.clone(), api_method, formatter, parts, body, uri_param).boxed()
}
}
}
fn log_response(worker: Arc<WorkerTask>, method: hyper::Method, path: &str, resp: &Response<Body>) {
let status = resp.status();
if !status.is_success() {
let reason = status.canonical_reason().unwrap_or("unknown reason");
let mut message = "request failed";
if let Some(data) = resp.extensions().get::<ErrorMessageExtension>() {
message = &data.0;
}
worker.log_message(format!(
"{} {}: {} {}: {}",
method.as_str(),
path,
status.as_str(),
reason,
message
));
}
}
}
impl <E: RpcEnvironment + Clone> tower_service::Service<Request<Body>> for H2Service<E> {
type Response = Response<Body>;
type Error = Error;
#[allow(clippy::type_complexity)]
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
fn poll_ready(&mut self, _cx: &mut Context) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
let path = req.uri().path().to_owned();
let method = req.method().clone();
let worker = self.worker.clone();
self.handle_request(req)
.map(move |result| match result {
Ok(res) => {
Self::log_response(worker, method, &path, &res);
Ok::<_, Error>(res)
}
Err(err) => {
if let Some(apierr) = err.downcast_ref::<HttpError>() {
let mut resp = Response::new(Body::from(apierr.message.clone()));
resp.extensions_mut().insert(ErrorMessageExtension(apierr.message.clone()));
*resp.status_mut() = apierr.code;
Self::log_response(worker, method, &path, &resp);
Ok(resp)
} else {
let mut resp = Response::new(Body::from(err.to_string()));
resp.extensions_mut().insert(ErrorMessageExtension(err.to_string()));
*resp.status_mut() = StatusCode::BAD_REQUEST;
Self::log_response(worker, method, &path, &resp);
Ok(resp)
}
}
})
.boxed()
}
}