130 lines
4.8 KiB
Rust
130 lines
4.8 KiB
Rust
// Copyright 2019-2021 Parity Technologies (UK) Ltd.
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//
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// Permission is hereby granted, free of charge, to any
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// person obtaining a copy of this software and associated
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// documentation files (the "Software"), to deal in the
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// Software without restriction, including without
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// limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice
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// shall be included in all copies or substantial portions
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// of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//! jsonrpsee supports two kinds of middlewares `http_middleware` and `rpc_middleware`.
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//!
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//! This example demonstrates how to use the `http_middleware` which applies for each
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//! HTTP request.
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//!
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//! A typical use-case for this it to apply a specific CORS policy which applies both
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//! for HTTP and WebSocket.
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//!
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use hyper::Method;
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use hyper::body::Bytes;
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use hyper::http::HeaderValue;
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use jsonrpsee::rpc_params;
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use std::iter::once;
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use std::net::SocketAddr;
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use std::time::Duration;
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use tower_http::LatencyUnit;
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use tower_http::compression::CompressionLayer;
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use tower_http::cors::CorsLayer;
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use tower_http::sensitive_headers::SetSensitiveRequestHeadersLayer;
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use tower_http::trace::{DefaultMakeSpan, DefaultOnResponse, TraceLayer};
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use jsonrpsee::core::client::ClientT;
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use jsonrpsee::http_client::HttpClient;
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use jsonrpsee::server::{RpcModule, Server};
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use jsonrpsee::ws_client::WsClientBuilder;
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#[tokio::main]
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async fn main() -> anyhow::Result<()> {
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tracing_subscriber::FmtSubscriber::builder()
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.with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
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.try_init()
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.expect("setting default subscriber failed");
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let addr = run_server().await?;
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// WebSocket.
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{
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let client = WsClientBuilder::default().build(format!("ws://{}", addr)).await?;
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let response: String = client.request("say_hello", rpc_params![]).await?;
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println!("[main]: ws response: {:?}", response);
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let _response: Result<String, _> = client.request("unknown_method", rpc_params![]).await;
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let _ = client.request::<String, _>("say_hello", rpc_params![]).await?;
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}
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tokio::time::sleep(std::time::Duration::from_secs(1)).await;
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// HTTP.
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{
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let client = HttpClient::builder().build(format!("http://{}", addr))?;
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let response: String = client.request("say_hello", rpc_params![]).await?;
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println!("[main]: http response: {:?}", response);
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let _response: Result<String, _> = client.request("unknown_method", rpc_params![]).await;
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let _ = client.request::<String, _>("say_hello", rpc_params![]).await?;
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}
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Ok(())
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}
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async fn run_server() -> anyhow::Result<SocketAddr> {
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let cors = CorsLayer::new()
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// Allow `POST` when accessing the resource
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.allow_methods([Method::POST])
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// Allow requests from any origin
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.allow_origin(HeaderValue::from_str("http://example.com").unwrap())
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.allow_headers([hyper::header::CONTENT_TYPE]);
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// Custom tower service to handle the RPC requests
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let service_builder = tower::ServiceBuilder::new()
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// Add high level tracing/logging to all requests
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.layer(
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TraceLayer::new_for_http()
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.on_request(
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|request: &hyper::Request<_>, _span: &tracing::Span| tracing::info!(request = ?request, "on_request"),
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)
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.on_body_chunk(|chunk: &Bytes, latency: Duration, _: &tracing::Span| {
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tracing::info!(size_bytes = chunk.len(), latency = ?latency, "sending body chunk")
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})
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.make_span_with(DefaultMakeSpan::new().include_headers(true))
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.on_response(DefaultOnResponse::new().include_headers(true).latency_unit(LatencyUnit::Micros)),
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)
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// Mark the `Authorization` request header as sensitive so it doesn't show in logs
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.layer(SetSensitiveRequestHeadersLayer::new(once(hyper::header::AUTHORIZATION)))
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.layer(cors)
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.layer(CompressionLayer::new())
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.timeout(Duration::from_secs(2));
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let server =
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Server::builder().set_http_middleware(service_builder).build("127.0.0.1:0".parse::<SocketAddr>()?).await?;
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let addr = server.local_addr()?;
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let mut module = RpcModule::new(());
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module.register_method("say_hello", |_, _, _| "lo").unwrap();
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let handle = server.start(module);
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// In this example we don't care about doing shutdown so let's it run forever.
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// You may use the `ServerHandle` to shut it down or manage it yourself.
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tokio::spawn(handle.stopped());
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Ok(addr)
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}
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