src/server/h2service.rs

   1 use anyhow::{Error};
   2
   3 use std::collections::HashMap;
   4 use std::pin::Pin;
   5 use std::sync::Arc;
   6 use std::task::{Context, Poll};
   7
   8 use futures::*;
   9 use hyper::{Body, Request, Response, StatusCode};
  10
  11 use proxmox::api::{ApiResponseFuture, HttpError, Router, RpcEnvironment};
  12 use proxmox::http_err;
  13
  14 use crate::tools;
  15 use crate::server::formatter::*;
  16 use crate::server::WorkerTask;
  17
  18 /// Hyper Service implementation to handle stateful H2 connections.
  19 ///
  20 /// We use this kind of service to handle backup protocol
  21 /// connections. State is stored inside the generic ``rpcenv``. Logs
  22 /// goes into the ``WorkerTask`` log.
  23 pub struct H2Service<E> {
  24     router: &'static Router,
  25     rpcenv: E,
  26     worker: Arc<WorkerTask>,
  27     debug: bool,
  28 }
  29
  30 impl <E: RpcEnvironment + Clone> H2Service<E> {
  31
  32     pub fn new(rpcenv: E, worker: Arc<WorkerTask>, router: &'static Router, debug: bool) -> Self {
  33         Self { rpcenv, worker, router, debug }
  34     }
  35
  36     pub fn debug<S: AsRef<str>>(&self, msg: S) {
  37         if self.debug { self.worker.log(msg); }
  38     }
  39
  40     fn handle_request(&self, req: Request<Body>) -> ApiResponseFuture {
  41
  42         let (parts, body) = req.into_parts();
  43
  44         let method = parts.method.clone();
  45
  46         let (path, components) = match tools::normalize_uri_path(parts.uri.path()) {
  47             Ok((p,c)) => (p, c),
  48             Err(err) => return future::err(http_err!(BAD_REQUEST, "{}", err)).boxed(),
  49         };
  50
  51         self.debug(format!("{} {}", method, path));
  52
  53         let mut uri_param = HashMap::new();
  54
  55         let formatter = &JSON_FORMATTER;
  56
  57         match self.router.find_method(&components, method, &mut uri_param) {
  58             None => {
  59                 let err = http_err!(NOT_FOUND, "Path '{}' not found.", path);
  60                 future::ok((formatter.format_error)(err)).boxed()
  61             }
  62             Some(api_method) => {
  63                 crate::server::rest::handle_api_request(
  64                     self.rpcenv.clone(), api_method, formatter, parts, body, uri_param).boxed()
  65             }
  66         }
  67     }
  68
  69     fn log_response(worker: Arc<WorkerTask>, method: hyper::Method, path: &str, resp: &Response<Body>) {
  70
  71         let status = resp.status();
  72
  73         if !status.is_success() {
  74             let reason = status.canonical_reason().unwrap_or("unknown reason");
  75
  76             let mut message = "request failed";
  77             if let Some(data) = resp.extensions().get::<ErrorMessageExtension>() {
  78                 message = &data.0;
  79             }
  80
  81             worker.log(format!("{} {}: {} {}: {}", method.as_str(), path, status.as_str(), reason, message));
  82         }
  83     }
  84 }
  85
  86 impl <E: RpcEnvironment + Clone> tower_service::Service<Request<Body>> for H2Service<E> {
  87     type Response = Response<Body>;
  88     type Error = Error;
  89     #[allow(clippy::type_complexity)]
  90     type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
  91
  92     fn poll_ready(&mut self, _cx: &mut Context) -> Poll<Result<(), Self::Error>> {
  93         Poll::Ready(Ok(()))
  94     }
  95
  96     fn call(&mut self, req: Request<Body>) -> Self::Future {
  97         let path = req.uri().path().to_owned();
  98         let method = req.method().clone();
  99         let worker = self.worker.clone();
 100
 101         self.handle_request(req)
 102             .map(move |result| match result {
 103                 Ok(res) => {
 104                     Self::log_response(worker, method, &path, &res);
 105                     Ok::<_, Error>(res)
 106                 }
 107                 Err(err) => {
 108                      if let Some(apierr) = err.downcast_ref::<HttpError>() {
 109                         let mut resp = Response::new(Body::from(apierr.message.clone()));
 110                         resp.extensions_mut().insert(ErrorMessageExtension(apierr.message.clone()));
 111                         *resp.status_mut() = apierr.code;
 112                         Self::log_response(worker, method, &path, &resp);
 113                         Ok(resp)
 114                     } else {
 115                         let mut resp = Response::new(Body::from(err.to_string()));
 116                         resp.extensions_mut().insert(ErrorMessageExtension(err.to_string()));
 117                         *resp.status_mut() = StatusCode::BAD_REQUEST;
 118                         Self::log_response(worker, method, &path, &resp);
 119                         Ok(resp)
 120                     }
 121                 }
 122             })
 123             .boxed()
 124     }
 125 }