Exposing RPC over websockets

signer/src/lib.rs

@@ -50,6 +50,7 @@ extern crate rustc_serialize;
 
 extern crate ethcore_util as util;
 extern crate ethcore_rpc as rpc;
+extern crate jsonrpc_core;
 extern crate ws;
 
 mod signing_queue;

signer/src/signing_queue.rs

@@ -45,7 +45,7 @@ mod test {
 	use std::collections::HashSet;
 	use util::hash::Address;
 	use util::numbers::U256;
-	use rpc::v1::types::transaction_request::TransactionRequest;
+	use rpc::v1::types::TransactionRequest;
 	use super::*;
 
 	#[test]

signer/src/ws_server/mod.rs

@@ -19,11 +19,14 @@
 use ws;
 use std;
 use std::thread;
+use std::default::Default;
 use std::ops::Drop;
 use std::sync::Arc;
-use std::sync::atomic::{AtomicUsize, Ordering};
 use std::net::SocketAddr;
 use util::panics::{PanicHandler, OnPanicListener, MayPanic};
+use jsonrpc_core::{IoHandler, IoDelegate};
+
+mod session;
 
 /// Signer startup error
 #[derive(Debug)]
@@ -43,9 +46,40 @@ impl From<ws::Error> for ServerError {
 	}
 }
 
+/// Builder for `WebSockets` server
+pub struct ServerBuilder {
+	handler: Arc<IoHandler>,
+}
+
+impl Default for ServerBuilder {
+	fn default() -> Self {
+		ServerBuilder::new()
+	}
+}
+
+impl ServerBuilder {
+	/// Creates new `ServerBuilder`
+	pub fn new() -> Self {
+		ServerBuilder {
+			handler: Arc::new(IoHandler::new())
+		}
+	}
+
+	/// Adds rpc delegate
+	pub fn add_delegate<D>(&self, delegate: IoDelegate<D>) where D: Send + Sync + 'static {
+		self.handler.add_delegate(delegate);
+	}
+
+	/// Starts a new `WebSocket` server in separate thread.
+	/// Returns a `Server` handle which closes the server when droped.
+	pub fn start(self, addr: SocketAddr) -> Result<Server, ServerError> {
+		Server::start(addr, self.handler)
+	}
+}
+
 /// `WebSockets` server implementation.
 pub struct Server {
-	handle: Option<thread::JoinHandle<ws::WebSocket<Factory>>>,
+	handle: Option<thread::JoinHandle<ws::WebSocket<session::Factory>>>,
 	broadcaster: ws::Sender,
 	panic_handler: Arc<PanicHandler>,
 }
@@ -53,7 +87,7 @@ pub struct Server {
 impl Server {
 	/// Starts a new `WebSocket` server in separate thread.
 	/// Returns a `Server` handle which closes the server when droped.
-	pub fn start(addr: SocketAddr) -> Result<Server, ServerError> {
+	pub fn start(addr: SocketAddr, handler: Arc<IoHandler>) -> Result<Server, ServerError> {
 		let config = {
 			let mut config = ws::Settings::default();
 			config.max_connections = 5;
@@ -62,10 +96,7 @@ impl Server {
 		};
 
 		// Create WebSocket
-		let session_id = Arc::new(AtomicUsize::new(1));
-		let ws = try!(ws::Builder::new().with_settings(config).build(Factory {
-			session_id: session_id,
-		}));
+		let ws = try!(ws::Builder::new().with_settings(config).build(session::Factory::new(handler)));
 
 		let panic_handler = PanicHandler::new_in_arc();
 		let ph = panic_handler.clone();
@@ -98,31 +129,3 @@ impl Drop for Server {
 		self.handle.take().unwrap().join().unwrap();
 	}
 }
-
-struct Session {
-	id: usize,
-	out: ws::Sender,
-}
-
-impl ws::Handler for Session {
-	fn on_open(&mut self, _shake: ws::Handshake) -> ws::Result<()> {
-		try!(self.out.send(format!("Hello client no: {}. We are not implemented yet.", self.id)));
-		try!(self.out.close(ws::CloseCode::Normal));
-		Ok(())
-	}
-}
-
-struct Factory {
-	session_id: Arc<AtomicUsize>,
-}
-
-impl ws::Factory for Factory {
-	type Handler = Session;
-
-	fn connection_made(&mut self, sender: ws::Sender) -> Self::Handler {
-		Session {
-			id: self.session_id.fetch_add(1, Ordering::SeqCst),
-			out: sender,
-		}
-	}
-}

signer/src/ws_server/session.rs

@@ -0,0 +1,59 @@
+// Copyright 2015, 2016 Ethcore (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 <http://www.gnu.org/licenses/>.
+
+//! Session handlers factory.
+
+use ws;
+use std::sync::Arc;
+use jsonrpc_core::IoHandler;
+
+pub struct Session {
+	out: ws::Sender,
+	handler: Arc<IoHandler>,
+}
+
+impl ws::Handler for Session {
+	fn on_message(&mut self, msg: ws::Message) -> ws::Result<()> {
+		let req = try!(msg.as_text());
+		match self.handler.handle_request(req) {
+			Some(res) => self.out.send(res),
+			None => Ok(()),
+		}
+	}
+}
+
+pub struct Factory {
+	handler: Arc<IoHandler>,
+}
+
+impl Factory {
+	pub fn new(handler: Arc<IoHandler>) -> Self {
+		Factory {
+			handler: handler,
+		}
+	}
+}
+
+impl ws::Factory for Factory {
+	type Handler = Session;
+
+	fn connection_made(&mut self, sender: ws::Sender) -> Self::Handler {
+		Session {
+			out: sender,
+			handler: self.handler.clone(),
+		}
+	}
+}