Proxy.pac serving

webapp/src/api.rs

@@ -16,12 +16,8 @@
 
 //! Simple REST API
 
-use std::io::Write;
 use std::sync::Arc;
-use hyper::status::StatusCode;
-use hyper::{header, server, Decoder, Encoder, Next};
-use hyper::net::HttpStream;
-use endpoint::{Endpoint, Endpoints};
+use endpoint::{Endpoint, Endpoints, ContentHandler, Handler, HostInfo};
 
 pub struct RestApi {
 	endpoints: Arc<Endpoints>,
@@ -46,49 +42,8 @@ impl RestApi {
 }
 
 impl Endpoint for RestApi {
-	fn to_handler(&self, _prefix: &str) -> Box<server::Handler<HttpStream>> {
-		Box::new(RestApiHandler {
-			pages: self.list_pages(),
-			write_pos: 0,
-		})
+	fn to_handler(&self, _prefix: &str, _host: Option<HostInfo>) -> Box<Handler> {
+		Box::new(ContentHandler::new(self.list_pages(), "application/json".to_owned()))
 	}
 }
 
-struct RestApiHandler {
-	pages: String,
-	write_pos: usize,
-}
-
-impl server::Handler<HttpStream> for RestApiHandler {
-	fn on_request(&mut self, _request: server::Request) -> Next {
-		Next::write()
-	}
-
-	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
-		Next::write()
-	}
-
-	fn on_response(&mut self, res: &mut server::Response) -> Next {
-		res.set_status(StatusCode::Ok);
-		res.headers_mut().set(header::ContentType("application/json".parse().unwrap()));
-		Next::write()
-	}
-	
-	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
-		let bytes = self.pages.as_bytes();
-		if self.write_pos == bytes.len() {
-			return Next::end();
-		}
-
-		match encoder.write(&bytes[self.write_pos..]) {
-			Ok(bytes) => {
-				self.write_pos += bytes;
-				Next::write()
-			},
-			Err(e) => match e.kind() {
-				::std::io::ErrorKind::WouldBlock => Next::write(),
-				_ => Next::end()
-			},
-		}
-	}
-}

webapp/src/apps.rs

@@ -14,8 +14,10 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+use std::net::SocketAddr;
 use endpoint::Endpoints;
 use page::PageEndpoint;
+use proxypac::ProxyPac;
 
 extern crate parity_status;
 #[cfg(feature = "parity-wallet")]
@@ -26,17 +28,17 @@ pub fn main_page() -> &'static str {
 	"/status/"
 }
 
-pub fn all_endpoints() -> Endpoints {
+pub fn all_endpoints(addr: &SocketAddr) -> Endpoints {
 	let mut pages = Endpoints::new();
 	pages.insert("status".to_owned(), Box::new(PageEndpoint::new(parity_status::App::default())));
+	pages.insert("proxy".to_owned(), ProxyPac::new(addr));
+
 	wallet_page(&mut pages);
 	pages
 }
 
-#[cfg(feature = "parity-wallet")]
 fn wallet_page(pages: &mut Endpoints) {
+	if cfg!(feature = "parity-wallet") {
 		pages.insert("wallet".to_owned(), Box::new(PageEndpoint::new(parity_wallet::App::default())));
 	}
-
-#[cfg(not(feature = "parity-wallet"))]
-fn wallet_page(_pages: &mut Endpoints) {}
+}

webapp/src/endpoint.rs

@@ -16,12 +16,72 @@
 
 //! URL Endpoint traits
 
-use hyper::server;
+use url::Host;
+use hyper::status::StatusCode;
+use hyper::{header, server, Decoder, Encoder, Next};
 use hyper::net::HttpStream;
+
+use std::io::Write;
 use std::collections::HashMap;
 
+pub struct HostInfo {
+	pub host: Host,
+	pub port: u16,
+}
+
 pub trait Endpoint : Send + Sync {
-	fn to_handler(&self, prefix: &str) -> Box<server::Handler<HttpStream>>;
+	fn to_handler(&self, prefix: &str, host: Option<HostInfo>) -> Box<server::Handler<HttpStream>>;
 }
 
 pub type Endpoints = HashMap<String, Box<Endpoint>>;
+pub type Handler = server::Handler<HttpStream>;
+
+pub struct ContentHandler {
+	content: String,
+	mimetype: String,
+	write_pos: usize,
+}
+
+impl ContentHandler {
+	pub fn new(content: String, mimetype: String) -> Self {
+		ContentHandler {
+			content: content,
+			mimetype: mimetype,
+			write_pos: 0
+		}
+	}
+}
+
+impl server::Handler<HttpStream> for ContentHandler {
+	fn on_request(&mut self, _request: server::Request) -> Next {
+		Next::write()
+	}
+
+	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_response(&mut self, res: &mut server::Response) -> Next {
+		res.set_status(StatusCode::Ok);
+		res.headers_mut().set(header::ContentType(self.mimetype.parse().unwrap()));
+		Next::write()
+	}
+
+	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
+		let bytes = self.content.as_bytes();
+		if self.write_pos == bytes.len() {
+			return Next::end();
+		}
+
+		match encoder.write(&bytes[self.write_pos..]) {
+			Ok(bytes) => {
+				self.write_pos += bytes;
+				Next::write()
+			},
+			Err(e) => match e.kind() {
+				::std::io::ErrorKind::WouldBlock => Next::write(),
+				_ => Next::end()
+			},
+		}
+	}
+}

webapp/src/lib.rs

@@ -57,12 +57,15 @@ mod page;
 mod router;
 mod rpc;
 mod api;
+mod proxypac;
 
 use std::sync::{Arc, Mutex};
 use std::net::SocketAddr;
 use jsonrpc_core::{IoHandler, IoDelegate};
 use router::auth::{Authorization, NoAuth, HttpBasicAuth};
 
+static DAPPS_DOMAIN : &'static str = "dapp";
+
 /// Webapps HTTP+RPC server build.
 pub struct ServerBuilder {
 	handler: Arc<IoHandler>,
@@ -103,7 +106,7 @@ pub struct Server {
 impl Server {
 	fn start_http<A: Authorization + 'static>(addr: &SocketAddr, authorization: A, handler: Arc<IoHandler>) -> Result<Server, ServerError> {
 		let panic_handler = Arc::new(Mutex::new(None));
-		let endpoints = Arc::new(apps::all_endpoints());
+		let endpoints = Arc::new(apps::all_endpoints(addr));
 		let authorization = Arc::new(authorization);
 		let rpc_endpoint = Arc::new(rpc::rpc(handler, panic_handler.clone()));
 		let api = Arc::new(api::RestApi::new(endpoints.clone()));

webapp/src/page/mod.rs

@@ -22,7 +22,7 @@ use hyper::header;
 use hyper::status::StatusCode;
 use hyper::net::HttpStream;
 use hyper::{Decoder, Encoder, Next};
-use endpoint::Endpoint;
+use endpoint::{Endpoint, HostInfo};
 use parity_webapp::WebApp;
 
 pub struct PageEndpoint<T : WebApp + 'static> {
@@ -38,7 +38,7 @@ impl<T: WebApp + 'static> PageEndpoint<T> {
 }
 
 impl<T: WebApp> Endpoint for PageEndpoint<T> {
-	fn to_handler(&self, prefix: &str) -> Box<server::Handler<HttpStream>> {
+	fn to_handler(&self, prefix: &str, _host: Option<HostInfo>) -> Box<server::Handler<HttpStream>> {
 		Box::new(PageHandler {
 			app: self.app.clone(),
 			prefix: prefix.to_owned(),

webapp/src/proxypac.rs

@@ -0,0 +1,54 @@
+// 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/>.
+
+//! Serving ProxyPac file
+
+use std::net::SocketAddr;
+use endpoint::{Endpoint, Handler, ContentHandler, HostInfo};
+use DAPPS_DOMAIN;
+
+pub struct ProxyPac {
+	addr: SocketAddr,
+}
+
+impl ProxyPac {
+	pub fn new(addr: &SocketAddr) -> Box<Endpoint> {
+		Box::new(ProxyPac {
+			addr: addr.clone(),
+		})
+	}
+}
+
+impl Endpoint for ProxyPac {
+	fn to_handler(&self, _prefix: &str, host: Option<HostInfo>) -> Box<Handler> {
+		let host = host.map_or_else(|| format!("{}", self.addr), |h| format!("{}:{}", h.host, h.port));
+		let content = format!(
+r#"
+function FindProxyForURL(url, host) {{
+	if (shExpMatch(host, "*.{0}"))
+	{{
+		return "PROXY {1}";
+	}}
+
+	return "DIRECT";
+}}
+"#,
+			DAPPS_DOMAIN, host);
+		Box::new(ContentHandler::new(content, "application/javascript".to_owned()))
+	}
+}
+
+

webapp/src/router/mod.rs

@@ -26,7 +26,7 @@ use hyper;
 use hyper::{server, uri, header};
 use hyper::{Next, Encoder, Decoder};
 use hyper::net::HttpStream;
-use endpoint::{Endpoint, Endpoints};
+use endpoint::{Endpoint, Endpoints, HostInfo};
 use self::url::Url;
 use self::auth::{Authorization, Authorized};
 use self::redirect::Redirection;
@@ -43,32 +43,39 @@ pub struct Router<A: Authorization + 'static> {
 impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
 
 	fn on_request(&mut self, req: server::Request) -> Next {
+		// Check authorization
 		let auth = self.authorization.is_authorized(&req);
+
+		// Choose proper handler depending on path / domain
 		self.handler = match auth {
 			Authorized::No(handler) => handler,
 			Authorized::Yes => {
-				let path = self.extract_request_path(&req);
-				match path {
-					Some(ref url) if self.endpoints.contains_key(url) => {
-						let prefix = "/".to_owned() + url;
-						self.endpoints.get(url).unwrap().to_handler(&prefix)
+				let url = self.extract_url(&req);
+				let app_id = self.extract_app_id(&url);
+				let host = url.map(|u| HostInfo {
+					host: u.host,
+					port: u.port
+				});
+
+				match app_id {
+					Some(ref app_id) if self.endpoints.contains_key(&app_id.id) => {
+						self.endpoints.get(&app_id.id).unwrap().to_handler(&app_id.prefix, host)
 					},
-					Some(ref url) if url == "api" => {
-						self.api.to_handler("/api")
+					Some(ref app_id) if app_id.id == "api" => {
+						self.api.to_handler(&app_id.prefix, host)
 					},
 					_ if *req.method() == hyper::method::Method::Get => {
 						Redirection::new(self.main_page)
 					},
 					_ => {
-						self.rpc.to_handler(&"/")
+						self.rpc.to_handler("/", host)
 					}
 				}
 			}
 		};
-		self.handler.on_request(req)
-		// Check authorization
-		// Choose proper handler depending on path
+
 		// Delegate on_request to proper handler
+		self.handler.on_request(req)
 	}
 
 	/// This event occurs each time the `Request` is ready to be read from.
@@ -95,7 +102,7 @@ impl<A: Authorization> Router<A> {
 		api: Arc<Box<Endpoint>>,
 		authorization: Arc<A>) -> Self {
 
-		let handler = rpc.to_handler(&"/");
+		let handler = rpc.to_handler("/", None);
 		Router {
 			main_page: main_page,
 			endpoints: endpoints,
@@ -132,12 +139,14 @@ impl<A: Authorization> Router<A> {
 		}
 	}
 
-	fn extract_request_path(&self, req: &server::Request) -> Option<String> {
-		let url = self.extract_url(&req);
-		match url {
+	fn extract_app_id(&self, url: &Option<Url>) -> Option<AppId> {
+		match *url {
 			Some(ref url) if url.path.len() > 1 => {
-				let part = url.path[0].clone();
-				Some(part)
+				let id = url.path[0].clone();
+				Some(AppId {
+					id: id.clone(),
+					prefix: "/".to_owned() + &id
+				})
 			},
 			_ => {
 				None
@@ -145,3 +154,8 @@ impl<A: Authorization> Router<A> {
 		}
 	}
 }
+
+struct AppId {
+	id: String,
+	prefix: String
+}

webapp/src/rpc.rs

@@ -19,7 +19,7 @@ use hyper::server;
 use hyper::net::HttpStream;
 use jsonrpc_core::IoHandler;
 use jsonrpc_http_server::{ServerHandler, PanicHandler, AccessControlAllowOrigin};
-use endpoint::Endpoint;
+use endpoint::{Endpoint, HostInfo};
 
 pub fn rpc(handler: Arc<IoHandler>, panic_handler: Arc<Mutex<Option<Box<Fn() -> () + Send>>>>) -> Box<Endpoint> {
 	Box::new(RpcEndpoint {
@@ -36,7 +36,7 @@ struct RpcEndpoint {
 }
 
 impl Endpoint for RpcEndpoint {
-	fn to_handler(&self, _prefix: &str) -> Box<server::Handler<HttpStream>> {
+	fn to_handler(&self, _prefix: &str, _host: Option<HostInfo>) -> Box<server::Handler<HttpStream>> {
 		let panic_handler = PanicHandler { handler: self.panic_handler.clone() };
 		Box::new(ServerHandler::new(self.handler.clone(), self.cors_domain.clone(), panic_handler))
 	}