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♻️ Fixing clippy lints

main
_ 2020-11-29 18:37:33 +00:00
parent 5c0d7ea998
commit 687cffdf90
3 changed files with 135 additions and 66 deletions
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12
crates/ptth_relay/src/config.rs
View File

@ -1,19 +1,21 @@
// False positive with itertools::process_results
#![allow (clippy::redundant_closure)]
use std::{
collections::*,
collections::HashMap,
convert::{TryFrom, TryInto},
iter::FromIterator,
path::Path,
};
use serde::Deserialize;
use crate::errors::ConfigError;
// Stuff we need to load from the config file and use to
// set up the HTTP server
pub mod file {
use super::*;
use std::collections::HashMap;
use serde::Deserialize;
#[derive (Deserialize)]
pub struct Server {
@ -76,7 +78,7 @@ impl Config {
let mut f = tokio::fs::File::open (path).await?;
let mut buffer = vec! [0u8; 4096];
let mut buffer = vec! [0_u8; 4096];
let bytes_read = f.read (&mut buffer).await?;
buffer.truncate (bytes_read);

42
crates/ptth_relay/src/errors.rs
View File

@ -29,8 +29,50 @@ pub enum ShuttingDownError {
ShuttingDown,
}
#[derive (Error, Debug)]
pub enum HandleHttpResponseError {
#[error ("HTTP error")]
Http (#[from] http::Error),
#[error ("Missing PTTH magic header")]
MissingPtthMagicHeader,
#[error ("PTTH magic header is not base64")]
PtthMagicHeaderNotBase64 (base64::DecodeError),
#[error ("PTTH magic header could not be decoded as MessagePack")]
PtthMagicHeaderNotMsgPack (rmp_serde::decode::Error),
#[error ("Couldn't tell server something")]
LostServer,
#[error ("Relaying task panicked")]
RelayingTaskPanicked (#[from] tokio::task::JoinError),
}
#[derive (Error, Debug)]
pub enum RequestError {
#[error ("HTTP error")]
Http (#[from] http::Error),
#[error ("MessagePack encode error")]
MsgPack (#[from] rmp_serde::encode::Error),
#[error ("Handlebars rendering error")]
Handlebars (#[from] handlebars::RenderError),
#[error ("Error handling HTTP response")]
HandleHttpResponse (#[from] HandleHttpResponseError),
#[error ("Error is mysterious!")]
Mysterious,
}
#[derive (Error, Debug)]
pub enum RelayError {
#[error ("Handlebars template file error")]
TemplateFile (#[from] handlebars::TemplateFileError),
#[error ("Hyper error")]
Hyper (#[from] hyper::Error),
}

147
crates/ptth_relay/src/lib.rs
View File

@ -1,8 +1,23 @@
#![warn (clippy::pedantic)]
// I'm not sure if I like this one
#![allow (clippy::enum_glob_use)]
// I don't see the point in documenting the errors outside of where the
// error type is defined.
#![allow (clippy::missing_errors_doc)]
// I don't see the point of writing the type twice if I'm initializing a struct
// and the type is already in the struct definition.
#![allow (clippy::default_trait_access)]
// False positive on futures::select! macro
#![allow (clippy::mut_mut)]
use std::{
borrow::Cow,
error::Error,
collections::*,
convert::{Infallible, TryFrom},
collections::HashMap,
convert::TryFrom,
iter::FromIterator,
net::SocketAddr,
path::{Path, PathBuf},
@ -12,6 +27,11 @@ use std::{
time::Duration,
};
use chrono::{
DateTime,
SecondsFormat,
Utc
};
use dashmap::DashMap;
use futures::{
FutureExt,
@ -91,12 +111,6 @@ enum RequestRendezvous {
type ResponseRendezvous = oneshot::Sender <Result <(http_serde::ResponseParts, Body), ShuttingDownError>>;
use chrono::{
DateTime,
SecondsFormat,
Utc
};
#[derive (Clone)]
pub struct ServerStatus {
last_seen: DateTime <Utc>,
@ -174,9 +188,11 @@ async fn handle_http_listen (
watcher_code: String,
api_key: &[u8],
)
-> Result <Response <Body>, http::Error>
-> Result <Response <Body>, RequestError>
{
let trip_error = error_reply (StatusCode::UNAUTHORIZED, "Bad X-ApiKey");
use RequestRendezvous::*;
let trip_error = || Ok (error_reply (StatusCode::UNAUTHORIZED, "Bad X-ApiKey")?);
let expected_tripcode = {
let config = state.config.read ().await;
@ -184,16 +200,16 @@ async fn handle_http_listen (
match config.servers.get (&watcher_code) {
None => {
error! ("Denied http_listen for non-existent server name {}", watcher_code);
return trip_error;
return trip_error ();
},
Some (x) => (*x).tripcode.clone (),
Some (x) => (*x).tripcode,
}
};
let actual_tripcode = blake3::hash (api_key);
if expected_tripcode != actual_tripcode {
error! ("Denied http_listen for bad tripcode {}", base64::encode (actual_tripcode.as_bytes ()));
return trip_error;
return trip_error ();
}
// End of early returns
@ -206,8 +222,6 @@ async fn handle_http_listen (
status.last_seen = Utc::now ();
}
use RequestRendezvous::*;
let (tx, rx) = oneshot::channel ();
{
@ -220,7 +234,7 @@ async fn handle_http_listen (
// handle them immediately
debug! ("Sending {} parked requests to server {}", v.len (), watcher_code);
return ok_reply (rmp_serde::to_vec (&v).unwrap ());
return Ok (ok_reply (rmp_serde::to_vec (&v)?)?);
}
}
@ -234,14 +248,14 @@ async fn handle_http_listen (
x = rx.fuse () => match x {
Ok (Ok (one_req)) => {
debug! ("Unparking server {}", watcher_code);
ok_reply (rmp_serde::to_vec (&vec! [one_req]).unwrap ())
Ok (ok_reply (rmp_serde::to_vec (&vec! [one_req])?)?)
},
Ok (Err (ShuttingDownError::ShuttingDown)) => error_reply (StatusCode::SERVICE_UNAVAILABLE, "Server is shutting down, try again soon"),
Err (_) => error_reply (StatusCode::INTERNAL_SERVER_ERROR, "Server error"),
Ok (Err (ShuttingDownError::ShuttingDown)) => Ok (error_reply (StatusCode::SERVICE_UNAVAILABLE, "Server is shutting down, try again soon")?),
Err (_) => Ok (error_reply (StatusCode::INTERNAL_SERVER_ERROR, "Server error")?),
},
_ = delay_for (Duration::from_secs (30)).fuse () => {
debug! ("Timed out http_listen for server {}", watcher_code);
return error_reply (StatusCode::NO_CONTENT, "No requests now, long-poll again")
return Ok (error_reply (StatusCode::NO_CONTENT, "No requests now, long-poll again")?)
}
}
}
@ -253,26 +267,32 @@ async fn handle_http_response (
state: Arc <RelayState>,
req_id: String,
)
-> Result <Response <Body>, http::Error>
-> Result <Response <Body>, HandleHttpResponseError>
{
let (parts, mut body) = req.into_parts ();
let resp_parts: http_serde::ResponseParts = rmp_serde::from_read_ref (&base64::decode (parts.headers.get (ptth_core::PTTH_MAGIC_HEADER).unwrap ()).unwrap ()).unwrap ();
// Intercept the body packets here so we can check when the stream
// ends or errors out
#[derive (Debug)]
enum BodyFinishedReason {
StreamFinished,
ClientDisconnected,
}
use BodyFinishedReason::*;
use HandleHttpResponseError::*;
let (parts, mut body) = req.into_parts ();
let magic_header = parts.headers.get (ptth_core::PTTH_MAGIC_HEADER).ok_or (MissingPtthMagicHeader)?;
let magic_header = base64::decode (magic_header).map_err (PtthMagicHeaderNotBase64)?;
let resp_parts: http_serde::ResponseParts = rmp_serde::from_read_ref (&magic_header).map_err (PtthMagicHeaderNotMsgPack)?;
// Intercept the body packets here so we can check when the stream
// ends or errors out
let (mut body_tx, body_rx) = mpsc::channel (2);
let (body_finished_tx, body_finished_rx) = oneshot::channel ();
let mut shutdown_watch_rx = state.shutdown_watch_rx.clone ();
spawn (async move {
let relay_task = spawn (async move {
if shutdown_watch_rx.recv ().await == Some (false) {
loop {
let item = body.next ().await;
@ -285,7 +305,7 @@ async fn handle_http_response (
futures::select! {
x = body_tx.send (item).fuse () => if let Err (_) = x {
info! ("Body closed while relaying. (Client hung up?)");
body_finished_tx.send (ClientDisconnected).unwrap ();
body_finished_tx.send (ClientDisconnected).map_err (|_| LostServer).unwrap ();
break;
},
_ = shutdown_watch_rx.recv ().fuse () => {
@ -296,7 +316,7 @@ async fn handle_http_response (
}
else {
debug! ("Finished relaying bytes");
body_finished_tx.send (StreamFinished).unwrap ();
body_finished_tx.send (StreamFinished).map_err (|_| LostServer).unwrap ();
break;
}
}
@ -313,7 +333,7 @@ async fn handle_http_response (
match response_rendezvous.remove (&req_id) {
None => {
error! ("Server tried to respond to non-existent request");
return error_reply (StatusCode::BAD_REQUEST, "Request ID not found in response_rendezvous");
return Ok (error_reply (StatusCode::BAD_REQUEST, "Request ID not found in response_rendezvous")?);
},
Some ((_, x)) => x,
}
@ -323,20 +343,22 @@ async fn handle_http_response (
if tx.send (Ok ((resp_parts, body))).is_err () {
let msg = "Failed to connect to client";
error! (msg);
return error_reply (StatusCode::BAD_GATEWAY, msg);
return Ok (error_reply (StatusCode::BAD_GATEWAY, msg)?);
}
relay_task.await?;
debug! ("Connected server to client for streaming.");
match body_finished_rx.await {
Ok (StreamFinished) => {
error_reply (StatusCode::OK, "StreamFinished")
Ok (error_reply (StatusCode::OK, "StreamFinished")?)
},
Ok (ClientDisconnected) => {
error_reply (StatusCode::OK, "ClientDisconnected")
Ok (error_reply (StatusCode::OK, "ClientDisconnected")?)
},
Err (e) => {
debug! ("body_finished_rx {}", e);
error_reply (StatusCode::OK, "body_finished_rx Err")
Ok (error_reply (StatusCode::OK, "body_finished_rx Err")?)
},
}
}
@ -361,7 +383,7 @@ async fn handle_http_request (
let req = match http_serde::RequestParts::from_hyper (req.method, uri, req.headers) {
Ok (x) => x,
_ => return error_reply (StatusCode::BAD_REQUEST, "Bad request"),
Err (_) => return error_reply (StatusCode::BAD_REQUEST, "Bad request"),
};
let (tx, rx) = oneshot::channel ();
@ -375,6 +397,8 @@ async fn handle_http_request (
trace! ("Created request {}", req_id);
{
use RequestRendezvous::*;
let mut request_rendezvous = state.request_rendezvous.lock ().await;
let wrapped = http_serde::WrappedRequest {
@ -382,8 +406,6 @@ async fn handle_http_request (
req,
};
use RequestRendezvous::*;
let new_rendezvous = match request_rendezvous.remove (&watcher_code) {
Some (ParkedClients (mut v)) => {
debug! ("Parking request {} ({} already queued)", req_id, v.len ());
@ -439,7 +461,7 @@ async fn handle_http_request (
let mut resp = Response::builder ()
.status (hyper::StatusCode::from (parts.status_code));
for (k, v) in parts.headers.into_iter () {
for (k, v) in parts.headers {
resp = resp.header (&k, v);
}
@ -567,17 +589,17 @@ async fn handle_server_list_internal (state: &Arc <RelayState>)
async fn handle_server_list (
state: Arc <RelayState>
) -> Result <Response <Body>, http::Error>
) -> Result <Response <Body>, RequestError>
{
let page = handle_server_list_internal (&state).await;
let s = state.handlebars.render ("relay_server_list", &page).unwrap ();
ok_reply (s)
let s = state.handlebars.render ("relay_server_list", &page)?;
Ok (ok_reply (s)?)
}
#[instrument (level = "trace", skip (req, state))]
async fn handle_all (req: Request <Body>, state: Arc <RelayState>)
-> Result <Response <Body>, http::Error>
-> Result <Response <Body>, RequestError>
{
let path = req.uri ().path ();
//println! ("{}", path);
@ -592,44 +614,47 @@ async fn handle_all (req: Request <Body>, state: Arc <RelayState>)
return if let Some (request_code) = prefix_match ("/7ZSFUKGV/http_response/", path) {
let request_code = request_code.into ();
handle_http_response (req, state, request_code).await
Ok (handle_http_response (req, state, request_code).await?)
}
else {
error_reply (StatusCode::BAD_REQUEST, "Can't POST this")
Ok (error_reply (StatusCode::BAD_REQUEST, "Can't POST this")?)
};
}
if let Some (listen_code) = prefix_match ("/7ZSFUKGV/http_listen/", path) {
let api_key = match api_key {
None => return error_reply (StatusCode::UNAUTHORIZED, "Can't register as server without an API key"),
None => return Ok (error_reply (StatusCode::UNAUTHORIZED, "Can't register as server without an API key")?),
Some (x) => x,
};
handle_http_listen (state, listen_code.into (), api_key.as_bytes ()).await
}
else if let Some (rest) = prefix_match ("/frontend/servers/", path) {
if rest == "" {
handle_server_list (state).await
Ok (handle_server_list (state).await?)
}
else if let Some (idx) = rest.find ('/') {
let listen_code = String::from (&rest [0..idx]);
let path = String::from (&rest [idx..]);
let (parts, _) = req.into_parts ();
handle_http_request (parts, path, state, listen_code).await
Ok (handle_http_request (parts, path, state, listen_code).await?)
}
else {
error_reply (StatusCode::BAD_REQUEST, "Bad URI format")
Ok (error_reply (StatusCode::BAD_REQUEST, "Bad URI format")?)
}
}
else if path == "/" {
let s = state.handlebars.render ("relay_root", &()).unwrap ();
ok_reply (s)
let s = state.handlebars.render ("relay_root", &())?;
Ok (ok_reply (s)?)
}
else if path == "/frontend/relay_up_check" {
error_reply (StatusCode::OK, "Relay is up")
Ok (error_reply (StatusCode::OK, "Relay is up")?)
}
else if path == "/frontend/test_mysterious_error" {
Err (RequestError::Mysterious)
}
else {
error_reply (StatusCode::OK, "Hi")
Ok (error_reply (StatusCode::OK, "Hi")?)
}
}
@ -641,10 +666,10 @@ pub fn load_templates (asset_root: &Path)
let asset_root = asset_root.join ("handlebars/relay");
for (k, v) in vec! [
for (k, v) in &[
("relay_server_list", "relay_server_list.html"),
("relay_root", "relay_root.html"),
].into_iter () {
] {
handlebars.register_template_file (k, &asset_root.join (v))?;
}
@ -670,7 +695,7 @@ pub async fn run_relay (
shutdown_oneshot: oneshot::Receiver <()>,
config_reload_path: Option <PathBuf>
)
-> Result <(), Box <dyn Error>>
-> Result <(), RelayError>
{
let addr = SocketAddr::from ((
[0, 0, 0, 0],
@ -693,7 +718,7 @@ pub async fn run_relay (
let state = state.clone ();
async {
Ok::<_, Infallible> (service_fn (move |req| {
Ok::<_, RequestError> (service_fn (move |req| {
let state = state.clone ();
handle_all (req, state)
@ -705,18 +730,18 @@ pub async fn run_relay (
.serve (make_svc);
server.with_graceful_shutdown (async {
use ShuttingDownError::ShuttingDown;
shutdown_oneshot.await.ok ();
state.shutdown_watch_tx.broadcast (true).unwrap ();
use ShuttingDownError::ShuttingDown;
let mut response_rendezvous = state.response_rendezvous.write ().await;
let mut swapped = DashMap::default ();
std::mem::swap (&mut swapped, &mut response_rendezvous);
for (_, sender) in swapped.into_iter () {
for (_, sender) in swapped {
sender.send (Err (ShuttingDown)).ok ();
}