202 lines
5.8 KiB
Rust
202 lines
5.8 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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extern crate multihash;
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extern crate cid;
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extern crate unicase;
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extern crate rlp;
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extern crate ethcore;
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extern crate parity_bytes as bytes;
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extern crate ethereum_types;
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extern crate jsonrpc_core;
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extern crate jsonrpc_http_server as http;
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pub mod error;
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mod route;
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use std::thread;
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use std::sync::{mpsc, Arc};
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use std::net::{SocketAddr, IpAddr};
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use jsonrpc_core::futures::future::{self, FutureResult};
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use jsonrpc_core::futures::{self, Future};
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use ethcore::client::BlockChainClient;
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use http::hyper::{self, server, Method, StatusCode, Body,
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header::{self, HeaderValue},
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};
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use error::ServerError;
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use route::Out;
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pub use http::{AccessControlAllowOrigin, Host, DomainsValidation};
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/// Request/response handler
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pub struct IpfsHandler {
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/// Allowed CORS domains
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cors_domains: Option<Vec<AccessControlAllowOrigin>>,
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/// Hostnames allowed in the `Host` request header
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allowed_hosts: Option<Vec<Host>>,
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/// Reference to the Blockchain Client
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client: Arc<dyn BlockChainClient>,
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}
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impl IpfsHandler {
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pub fn client(&self) -> &dyn BlockChainClient {
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&*self.client
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}
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pub fn new(cors: DomainsValidation<AccessControlAllowOrigin>, hosts: DomainsValidation<Host>, client: Arc<dyn BlockChainClient>) -> Self {
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IpfsHandler {
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cors_domains: cors.into(),
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allowed_hosts: hosts.into(),
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client,
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}
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}
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pub fn on_request(&self, req: hyper::Request<Body>) -> (Option<HeaderValue>, Out) {
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match *req.method() {
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Method::GET | Method::POST => {},
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_ => return (None, Out::Bad("Invalid Request")),
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}
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if !http::is_host_allowed(&req, &self.allowed_hosts) {
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return (None, Out::Bad("Disallowed Host header"));
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}
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let cors_header = http::cors_allow_origin(&req, &self.cors_domains);
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if cors_header == http::AllowCors::Invalid {
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return (None, Out::Bad("Disallowed Origin header"));
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}
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let path = req.uri().path();
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let query = req.uri().query();
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return (cors_header.into(), self.route(path, query));
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}
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}
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impl hyper::service::Service for IpfsHandler {
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type ReqBody = Body;
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type ResBody = Body;
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type Error = hyper::Error;
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type Future = FutureResult<hyper::Response<Body>, Self::Error>;
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fn call(&mut self, request: hyper::Request<Self::ReqBody>) -> Self::Future {
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let (cors_header, out) = self.on_request(request);
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let mut res = match out {
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Out::OctetStream(bytes) => {
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hyper::Response::builder()
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.status(StatusCode::OK)
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.header("content-type", HeaderValue::from_static("application/octet-stream"))
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.body(bytes.into())
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},
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Out::NotFound(reason) => {
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hyper::Response::builder()
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.status(StatusCode::NOT_FOUND)
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.header("content-type", HeaderValue::from_static("text/plain; charset=utf-8"))
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.body(reason.into())
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},
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Out::Bad(reason) => {
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hyper::Response::builder()
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.status(StatusCode::BAD_REQUEST)
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.header("content-type", HeaderValue::from_static("text/plain; charset=utf-8"))
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.body(reason.into())
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}
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}.expect("Response builder: Parsing 'content-type' header name will not fail; qed");
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if let Some(cors_header) = cors_header {
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res.headers_mut().append(header::ACCESS_CONTROL_ALLOW_ORIGIN, cors_header);
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res.headers_mut().append(header::VARY, HeaderValue::from_static("origin"));
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}
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future::ok(res)
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}
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}
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/// Add current interface (default: "127.0.0.1:5001") to list of allowed hosts
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fn include_current_interface(mut hosts: Vec<Host>, interface: String, port: u16) -> Vec<Host> {
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hosts.push(match port {
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80 => interface,
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_ => format!("{}:{}", interface, port),
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}.into());
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hosts
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}
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#[derive(Debug)]
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pub struct Listening {
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close: Option<futures::sync::oneshot::Sender<()>>,
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thread: Option<thread::JoinHandle<()>>,
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}
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impl Drop for Listening {
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fn drop(&mut self) {
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self.close.take().unwrap().send(()).unwrap();
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let _ = self.thread.take().unwrap().join();
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}
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}
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pub fn start_server(
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port: u16,
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interface: String,
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cors: DomainsValidation<AccessControlAllowOrigin>,
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hosts: DomainsValidation<Host>,
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client: Arc<dyn BlockChainClient>
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) -> Result<Listening, ServerError> {
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let ip: IpAddr = interface.parse().map_err(|_| ServerError::InvalidInterface)?;
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let addr = SocketAddr::new(ip, port);
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let hosts: Option<Vec<_>> = hosts.into();
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let hosts: DomainsValidation<_> = hosts.map(move |hosts| include_current_interface(hosts, interface, port)).into();
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let (close, shutdown_signal) = futures::sync::oneshot::channel::<()>();
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let (tx, rx) = mpsc::sync_channel::<Result<(), ServerError>>(1);
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let thread = thread::spawn(move || {
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let send = |res| tx.send(res).expect("rx end is never dropped; qed");
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let server_bldr = match server::Server::try_bind(&addr) {
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Ok(s) => s,
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Err(err) => {
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send(Err(ServerError::from(err)));
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return;
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}
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};
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let new_service = move || {
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Ok::<_, ServerError>(
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IpfsHandler::new(cors.clone(), hosts.clone(), client.clone())
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)
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};
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let server = server_bldr
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.serve(new_service)
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.map_err(|_| ())
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.select(shutdown_signal.map_err(|_| ()))
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.then(|_| Ok(()));
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hyper::rt::run(server);
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send(Ok(()));
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});
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// Wait for server to start successfuly.
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rx.recv().expect("tx end is never dropped; qed")?;
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Ok(Listening {
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close: close.into(),
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thread: thread.into(),
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})
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}
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