Newer
Older
// Copyright 2019-2021 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to any
// person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the
// Software without restriction, including without
// limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice
// shall be included in all copies or substantial portions
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//! Middleware for `jsonrpsee` servers.
use std::net::SocketAddr;
pub use http::HeaderMap as Headers;
pub use jsonrpsee_types::Params;
/// Defines a middleware specifically for HTTP requests with callbacks during the RPC request life-cycle.
/// The primary use case for this is to collect timings for a larger metrics collection solution.
///
/// See [`HttpServerBuilder::set_middleware`](../../jsonrpsee_http_server/struct.HttpServerBuilder.html#method.set_middleware) method
/// for examples.
pub trait HttpMiddleware: Send + Sync + Clone + 'static {
/// Intended to carry timestamp of a request, for example `std::time::Instant`. How the middleware
/// measures time, if at all, is entirely up to the implementation.
type Instant: std::fmt::Debug + Send + Sync + Copy;
/// Called when a new JSON-RPC request comes to the server.
fn on_request(&self, remote_addr: SocketAddr, headers: &Headers) -> Self::Instant;
/// Called on each JSON-RPC method call, batch requests will trigger `on_call` multiple times.
fn on_call(&self, method_name: &str, params: Params);
/// Called on each JSON-RPC method completion, batch requests will trigger `on_result` multiple times.
fn on_result(&self, method_name: &str, success: bool, started_at: Self::Instant);
/// Called once the JSON-RPC request is finished and response is sent to the output buffer.
fn on_response(&self, result: &str, _started_at: Self::Instant);
}
/// Defines a middleware specifically for WebSocket connections with callbacks during the RPC request life-cycle.
/// The primary use case for this is to collect timings for a larger metrics collection solution.
///
/// See the [`WsServerBuilder::set_middleware`](../../jsonrpsee_ws_server/struct.WsServerBuilder.html#method.set_middleware)
/// for examples.
pub trait WsMiddleware: Send + Sync + Clone + 'static {
/// Intended to carry timestamp of a request, for example `std::time::Instant`. How the middleware
/// measures time, if at all, is entirely up to the implementation.
type Instant: std::fmt::Debug + Send + Sync + Copy;
/// Called when a new client connects
fn on_connect(&self, remote_addr: SocketAddr, headers: &Headers);
/// Called when a new JSON-RPC request comes to the server.
fn on_request(&self) -> Self::Instant;
/// Called on each JSON-RPC method call, batch requests will trigger `on_call` multiple times.
fn on_call(&self, method_name: &str, params: Params);
/// Called on each JSON-RPC method completion, batch requests will trigger `on_result` multiple times.
fn on_result(&self, method_name: &str, success: bool, started_at: Self::Instant);
/// Called once the JSON-RPC request is finished and response is sent to the output buffer.
fn on_response(&self, result: &str, started_at: Self::Instant);
/// Called when a client disconnects
fn on_disconnect(&self, remote_addr: std::net::SocketAddr);
}
impl HttpMiddleware for () {
type Instant = ();
fn on_request(&self, _: std::net::SocketAddr, _: &Headers) -> Self::Instant {}
fn on_call(&self, _: &str, _: Params) {}
fn on_result(&self, _: &str, _: bool, _: Self::Instant) {}
fn on_response(&self, _: &str, _: Self::Instant) {}
fn on_connect(&self, _: std::net::SocketAddr, _: &Headers) {}
fn on_call(&self, _: &str, _: Params) {}
fn on_result(&self, _: &str, _: bool, _: Self::Instant) {}
fn on_response(&self, _: &str, _: Self::Instant) {}
fn on_disconnect(&self, _: std::net::SocketAddr) {}
{
type Instant = (A::Instant, B::Instant);
fn on_connect(&self, remote_addr: std::net::SocketAddr, headers: &Headers) {
(self.0.on_connect(remote_addr, headers), self.1.on_connect(remote_addr, headers));
}
fn on_request(&self) -> Self::Instant {
(self.0.on_request(), self.1.on_request())
}
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
fn on_call(&self, method_name: &str, params: Params) {
self.0.on_call(method_name, params.clone());
self.1.on_call(method_name, params);
}
fn on_result(&self, method_name: &str, success: bool, started_at: Self::Instant) {
self.0.on_result(method_name, success, started_at.0);
self.1.on_result(method_name, success, started_at.1);
}
fn on_response(&self, result: &str, started_at: Self::Instant) {
self.0.on_response(result, started_at.0);
self.1.on_response(result, started_at.1);
}
fn on_disconnect(&self, remote_addr: std::net::SocketAddr) {
(self.0.on_disconnect(remote_addr), self.1.on_disconnect(remote_addr));
}
}
impl<A, B> HttpMiddleware for (A, B)
where
A: HttpMiddleware,
B: HttpMiddleware,
{
type Instant = (A::Instant, B::Instant);
fn on_request(&self, remote_addr: std::net::SocketAddr, headers: &Headers) -> Self::Instant {
(self.0.on_request(remote_addr, headers), self.1.on_request(remote_addr, headers))
}
fn on_call(&self, method_name: &str, params: Params) {
self.0.on_call(method_name, params.clone());
self.1.on_call(method_name, params);
fn on_result(&self, method_name: &str, success: bool, started_at: Self::Instant) {
self.0.on_result(method_name, success, started_at.0);
self.1.on_result(method_name, success, started_at.1);
fn on_response(&self, result: &str, started_at: Self::Instant) {
self.0.on_response(result, started_at.0);
self.1.on_response(result, started_at.1);