1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
use std::collections::HashMap;
use std::net::SocketAddr;
use std::pin::Pin;
use std::time::Instant;
use std::sync::Arc;
use bytes::IntoBuf;
use futures::future::Future;
use futures_util::future::*;
use futures_util::stream::*;
use hyper::server::conn::AddrStream;
use hyper::service::{make_service_fn, service_fn};
use hyper::{Body, Method, Request, Response, Server, StatusCode};
use serde::{Deserialize, Serialize};
use tokio::net::{TcpListener, TcpStream};
use tokio_rustls::server::TlsStream;
use tokio_rustls::TlsAcceptor;
use crate::data::*;
use crate::error::Error;
use crate::server::TlsConfig;
use crate::tls_util;
pub trait RpcMessage: Serialize + for<'de> Deserialize<'de> + Send + Sync {}
type ResponseFuture = Pin<Box<dyn Future<Output = Result<Response<Body>, Error>> + Send>>;
type Handler = Box<dyn Fn(Request<Body>, SocketAddr) -> ResponseFuture + Send + Sync>;
pub struct RpcServer {
pub bind_addr: SocketAddr,
pub tls_config: Option<TlsConfig>,
handlers: HashMap<String, Handler>,
}
async fn handle_func<M, F, Fut>(
handler: Arc<F>,
req: Request<Body>,
sockaddr: SocketAddr,
name: Arc<String>,
) -> Result<Response<Body>, Error>
where
M: RpcMessage + 'static,
F: Fn(M, SocketAddr) -> Fut + Send + Sync + 'static,
Fut: Future<Output = Result<M, Error>> + Send + 'static,
{
let begin_time = Instant::now();
let whole_body = hyper::body::to_bytes(req.into_body()).await?;
let msg = rmp_serde::decode::from_read::<_, M>(whole_body.into_buf())?;
let req_str = debug_serialize(&msg);
match handler(msg, sockaddr).await {
Ok(resp) => {
let resp_bytes = rmp_to_vec_all_named::<Result<M, String>>(&Ok(resp))?;
trace!("]RPC:{},ok ({} ms)", name, (Instant::now()-begin_time).as_millis());
Ok(Response::new(Body::from(resp_bytes)))
}
Err(e) => {
let err_str = format!("{}", e);
let rep_bytes = rmp_to_vec_all_named::<Result<M, String>>(&Err(err_str))?;
let mut err_response = Response::new(Body::from(rep_bytes));
*err_response.status_mut() = e.http_status_code();
warn!("RPC error ({}): {} ({} ms), request: {}", name, e, (Instant::now()-begin_time).as_millis(), req_str);
Ok(err_response)
}
}
}
impl RpcServer {
pub fn new(bind_addr: SocketAddr, tls_config: Option<TlsConfig>) -> Self {
Self {
bind_addr,
tls_config,
handlers: HashMap::new(),
}
}
pub fn add_handler<M, F, Fut>(&mut self, name: String, handler: F)
where
M: RpcMessage + 'static,
F: Fn(M, SocketAddr) -> Fut + Send + Sync + 'static,
Fut: Future<Output = Result<M, Error>> + Send + 'static,
{
let name2 = Arc::new(name.clone());
let handler_arc = Arc::new(handler);
let handler = Box::new(move |req: Request<Body>, sockaddr: SocketAddr| {
let handler2 = handler_arc.clone();
let b: ResponseFuture = Box::pin(handle_func(handler2, req, sockaddr, name2.clone()));
b
});
self.handlers.insert(name, handler);
}
async fn handler(
self: Arc<Self>,
req: Request<Body>,
addr: SocketAddr,
) -> Result<Response<Body>, Error> {
if req.method() != &Method::POST {
let mut bad_request = Response::default();
*bad_request.status_mut() = StatusCode::BAD_REQUEST;
return Ok(bad_request);
}
let path = &req.uri().path()[1..];
let handler = match self.handlers.get(path) {
Some(h) => h,
None => {
let mut not_found = Response::default();
*not_found.status_mut() = StatusCode::NOT_FOUND;
return Ok(not_found);
}
};
let resp_waiter = tokio::spawn(handler(req, addr));
match resp_waiter.await {
Err(err) => {
warn!("Handler await error: {}", err);
let mut ise = Response::default();
*ise.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
Ok(ise)
}
Ok(Err(err)) => {
let mut bad_request = Response::new(Body::from(format!("{}", err)));
*bad_request.status_mut() = StatusCode::BAD_REQUEST;
Ok(bad_request)
}
Ok(Ok(resp)) => Ok(resp),
}
}
pub async fn run(
self: Arc<Self>,
shutdown_signal: impl Future<Output = ()>,
) -> Result<(), Error> {
if let Some(tls_config) = self.tls_config.as_ref() {
let ca_certs = tls_util::load_certs(&tls_config.ca_cert)?;
let node_certs = tls_util::load_certs(&tls_config.node_cert)?;
let node_key = tls_util::load_private_key(&tls_config.node_key)?;
let mut ca_store = rustls::RootCertStore::empty();
for crt in ca_certs.iter() {
ca_store.add(crt)?;
}
let mut config =
rustls::ServerConfig::new(rustls::AllowAnyAuthenticatedClient::new(ca_store));
config.set_single_cert([&node_certs[..], &ca_certs[..]].concat(), node_key)?;
let tls_acceptor = Arc::new(TlsAcceptor::from(Arc::new(config)));
let mut listener = TcpListener::bind(&self.bind_addr).await?;
let incoming = listener.incoming().filter_map(|socket| async {
match socket {
Ok(stream) => match tls_acceptor.clone().accept(stream).await {
Ok(x) => Some(Ok::<_, hyper::Error>(x)),
Err(_e) => None,
},
Err(_) => None,
}
});
let incoming = hyper::server::accept::from_stream(incoming);
let self_arc = self.clone();
let service = make_service_fn(|conn: &TlsStream<TcpStream>| {
let client_addr = conn
.get_ref()
.0
.peer_addr()
.unwrap_or(([0, 0, 0, 0], 0).into());
let self_arc = self_arc.clone();
async move {
Ok::<_, Error>(service_fn(move |req: Request<Body>| {
self_arc.clone().handler(req, client_addr).map_err(|e| {
warn!("RPC handler error: {}", e);
e
})
}))
}
});
let server = Server::builder(incoming).serve(service);
let graceful = server.with_graceful_shutdown(shutdown_signal);
info!("RPC server listening on http://{}", self.bind_addr);
graceful.await?;
} else {
let self_arc = self.clone();
let service = make_service_fn(move |conn: &AddrStream| {
let client_addr = conn.remote_addr();
let self_arc = self_arc.clone();
async move {
Ok::<_, Error>(service_fn(move |req: Request<Body>| {
self_arc.clone().handler(req, client_addr).map_err(|e| {
warn!("RPC handler error: {}", e);
e
})
}))
}
});
let server = Server::bind(&self.bind_addr).serve(service);
let graceful = server.with_graceful_shutdown(shutdown_signal);
info!("RPC server listening on http://{}", self.bind_addr);
graceful.await?;
}
Ok(())
}
}
|
