// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see .
extern crate multihash;
extern crate cid;
extern crate unicase;
extern crate rlp;
extern crate ethcore;
extern crate parity_bytes as bytes;
extern crate ethereum_types;
extern crate jsonrpc_core as core;
extern crate jsonrpc_http_server as http;
pub mod error;
mod route;
use std::thread;
use std::sync::{mpsc, Arc};
use std::net::{SocketAddr, IpAddr};
use core::futures::future::{self, FutureResult};
use core::futures::{self, Future};
use ethcore::client::BlockChainClient;
use http::hyper::{self, server, Method, StatusCode, Body,
header::{self, HeaderValue},
};
use error::ServerError;
use route::Out;
pub use http::{AccessControlAllowOrigin, Host, DomainsValidation};
/// Request/response handler
pub struct IpfsHandler {
/// Allowed CORS domains
cors_domains: Option>,
/// Hostnames allowed in the `Host` request header
allowed_hosts: Option>,
/// Reference to the Blockchain Client
client: Arc,
}
impl IpfsHandler {
pub fn client(&self) -> &BlockChainClient {
&*self.client
}
pub fn new(cors: DomainsValidation, hosts: DomainsValidation, client: Arc) -> Self {
IpfsHandler {
cors_domains: cors.into(),
allowed_hosts: hosts.into(),
client: client,
}
}
pub fn on_request(&self, req: hyper::Request) -> (Option, Out) {
match *req.method() {
Method::GET | Method::POST => {},
_ => return (None, Out::Bad("Invalid Request")),
}
if !http::is_host_allowed(&req, &self.allowed_hosts) {
return (None, Out::Bad("Disallowed Host header"));
}
let cors_header = http::cors_allow_origin(&req, &self.cors_domains);
if cors_header == http::AllowCors::Invalid {
return (None, Out::Bad("Disallowed Origin header"));
}
let path = req.uri().path();
let query = req.uri().query();
return (cors_header.into(), self.route(path, query));
}
}
impl hyper::service::Service for IpfsHandler {
type ReqBody = Body;
type ResBody = Body;
type Error = hyper::Error;
type Future = FutureResult, Self::Error>;
fn call(&mut self, request: hyper::Request) -> Self::Future {
let (cors_header, out) = self.on_request(request);
let mut res = match out {
Out::OctetStream(bytes) => {
hyper::Response::builder()
.status(StatusCode::OK)
.header("content-type", HeaderValue::from_static("application/octet-stream"))
.body(bytes.into())
},
Out::NotFound(reason) => {
hyper::Response::builder()
.status(StatusCode::NOT_FOUND)
.header("content-type", HeaderValue::from_static("text/plain; charset=utf-8"))
.body(reason.into())
},
Out::Bad(reason) => {
hyper::Response::builder()
.status(StatusCode::BAD_REQUEST)
.header("content-type", HeaderValue::from_static("text/plain; charset=utf-8"))
.body(reason.into())
}
}.expect("Response builder: Parsing 'content-type' header name will not fail; qed");
if let Some(cors_header) = cors_header {
res.headers_mut().append(header::ACCESS_CONTROL_ALLOW_ORIGIN, cors_header);
res.headers_mut().append(header::VARY, HeaderValue::from_static("origin"));
}
future::ok(res)
}
}
/// Add current interface (default: "127.0.0.1:5001") to list of allowed hosts
fn include_current_interface(mut hosts: Vec, interface: String, port: u16) -> Vec {
hosts.push(match port {
80 => interface,
_ => format!("{}:{}", interface, port),
}.into());
hosts
}
#[derive(Debug)]
pub struct Listening {
close: Option>,
thread: Option>,
}
impl Drop for Listening {
fn drop(&mut self) {
self.close.take().unwrap().send(()).unwrap();
let _ = self.thread.take().unwrap().join();
}
}
pub fn start_server(
port: u16,
interface: String,
cors: DomainsValidation,
hosts: DomainsValidation,
client: Arc
) -> Result {
let ip: IpAddr = interface.parse().map_err(|_| ServerError::InvalidInterface)?;
let addr = SocketAddr::new(ip, port);
let hosts: Option> = hosts.into();
let hosts: DomainsValidation<_> = hosts.map(move |hosts| include_current_interface(hosts, interface, port)).into();
let (close, shutdown_signal) = futures::sync::oneshot::channel::<()>();
let (tx, rx) = mpsc::sync_channel::>(1);
let thread = thread::spawn(move || {
let send = |res| tx.send(res).expect("rx end is never dropped; qed");
let server_bldr = match server::Server::try_bind(&addr) {
Ok(s) => s,
Err(err) => {
send(Err(ServerError::from(err)));
return;
}
};
let new_service = move || {
Ok::<_, ServerError>(
IpfsHandler::new(cors.clone(), hosts.clone(), client.clone())
)
};
let server = server_bldr
.serve(new_service)
.map_err(|_| ())
.select(shutdown_signal.map_err(|_| ()))
.then(|_| Ok(()));
hyper::rt::run(server);
send(Ok(()));
});
// Wait for server to start successfuly.
rx.recv().expect("tx end is never dropped; qed")?;
Ok(Listening {
close: close.into(),
thread: thread.into(),
})
}