Subdomains support in content server (webapps server). (#1082)

* Proxy.pac serving

* Subdomains router for dapps

* Proper handling of prefixed and non-prefixed apps

* Changing dapps domain to parity

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, EndpointPath};
 
 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, _path: EndpointPath) -> 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

@@ -16,27 +16,36 @@
 
 use endpoint::Endpoints;
 use page::PageEndpoint;
+use proxypac::ProxyPac;
+use parity_webapp::WebApp;
 
 extern crate parity_status;
 #[cfg(feature = "parity-wallet")]
 extern crate parity_wallet;
 
-
 pub fn main_page() -> &'static str {
 	"/status/"
 }
 
 pub fn all_endpoints() -> 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::boxed());
+
+	insert::<parity_status::App>(&mut pages, "status");
+	insert::<parity_status::App>(&mut pages, "parity");
+
 	wallet_page(&mut pages);
 	pages
 }
 
 #[cfg(feature = "parity-wallet")]
 fn wallet_page(pages: &mut Endpoints) {
-	pages.insert("wallet".to_owned(), Box::new(PageEndpoint::new(parity_wallet::App::default())));
+	insert::<parity_wallet::App>(pages, "wallet");
 }
 
 #[cfg(not(feature = "parity-wallet"))]
 fn wallet_page(_pages: &mut Endpoints) {}
+
+fn insert<T : WebApp + Default + 'static>(pages: &mut Endpoints, id: &str) {
+	pages.insert(id.to_owned(), Box::new(PageEndpoint::new(T::default())));
+}

webapp/src/endpoint.rs

@@ -16,12 +16,73 @@
 
 //! URL Endpoint traits
 
-use hyper::server;
+use hyper::status::StatusCode;
+use hyper::{header, server, Decoder, Encoder, Next};
 use hyper::net::HttpStream;
+
+use std::io::Write;
 use std::collections::HashMap;
 
+#[derive(Debug, PartialEq, Default, Clone)]
+pub struct EndpointPath {
+	pub app_id: String,
+	pub host: String,
+	pub port: u16,
+}
+
 pub trait Endpoint : Send + Sync {
-	fn to_handler(&self, prefix: &str) -> Box<server::Handler<HttpStream>>;
+	fn to_handler(&self, path: EndpointPath) -> 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 = ".parity";
+
 /// Webapps HTTP+RPC server build.
 pub struct ServerBuilder {
 	handler: Arc<IoHandler>,

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, EndpointPath};
 use parity_webapp::WebApp;
 
 pub struct PageEndpoint<T : WebApp + 'static> {
@@ -38,34 +38,53 @@ 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, path: EndpointPath) -> Box<server::Handler<HttpStream>> {
 		Box::new(PageHandler {
 			app: self.app.clone(),
-			prefix: prefix.to_owned(),
-			prefix_with_slash: prefix.to_owned() + "/",
-			path: None,
+			path: path,
+			file: None,
 			write_pos: 0,
 		})
 	}
 }
 
 struct PageHandler<T: WebApp + 'static> {
 	app: Arc<T>,
-	prefix: String,
-	prefix_with_slash: String,
-	path: Option<String>,
+	path: EndpointPath,
+	file: Option<String>,
 	write_pos: usize,
 }
 
+impl<T: WebApp + 'static> PageHandler<T> {
+	fn extract_path(&self, path: &str) -> String {
+		let prefix = "/".to_owned() + &self.path.app_id;
+		let prefix_with_slash = prefix.clone() + "/";
+
+		// Index file support
+		match path == "/" || path == &prefix || path == &prefix_with_slash {
+			true => "index.html".to_owned(),
+			false => if path.starts_with(&prefix_with_slash) {
+				path[prefix_with_slash.len()..].to_owned()
+			} else if path.starts_with("/") {
+				path[1..].to_owned()
+			} else {
+				path.to_owned()
+			}
+		}
+	}
+}
+
 impl<T: WebApp + 'static> server::Handler<HttpStream> for PageHandler<T> {
 	fn on_request(&mut self, req: server::Request) -> Next {
-		if let RequestUri::AbsolutePath(ref path) = *req.uri() {
-			// Index file support
-			self.path = match path == &self.prefix || path == &self.prefix_with_slash {
-				true => Some("index.html".to_owned()),
-				false => Some(path[self.prefix_with_slash.len()..].to_owned()),
-			};
-		}
+		self.file = match *req.uri() {
+			RequestUri::AbsolutePath(ref path) => {
+				Some(self.extract_path(path))
+			},
+			RequestUri::AbsoluteUri(ref url) => {
+				Some(self.extract_path(url.path()))
+			},
+			_ => None,
+		};
 		Next::write()
 	}
 
@@ -74,7 +93,7 @@ impl<T: WebApp + 'static> server::Handler<HttpStream> for PageHandler<T> {
 	}
 
 	fn on_response(&mut self, res: &mut server::Response) -> Next {
-		if let Some(f) = self.path.as_ref().and_then(|f| self.app.file(f)) {
+		if let Some(f) = self.file.as_ref().and_then(|f| self.app.file(f)) {
 			res.set_status(StatusCode::Ok);
 			res.headers_mut().set(header::ContentType(f.content_type.parse().unwrap()));
 			Next::write()
@@ -86,7 +105,7 @@ impl<T: WebApp + 'static> server::Handler<HttpStream> for PageHandler<T> {
 
 	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
 		let (wrote, res) = {
-			let file = self.path.as_ref().and_then(|f| self.app.file(f));
+			let file = self.file.as_ref().and_then(|f| self.app.file(f));
 			match file {
 				None => (None, Next::end()),
 				Some(f) if self.write_pos == f.content.len() => (None, Next::end()),

webapp/src/proxypac.rs

@@ -0,0 +1,48 @@
+// 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 endpoint::{Endpoint, Handler, ContentHandler, EndpointPath};
+use DAPPS_DOMAIN;
+
+pub struct ProxyPac;
+
+impl ProxyPac {
+	pub fn boxed() -> Box<Endpoint> {
+		Box::new(ProxyPac)
+	}
+}
+
+impl Endpoint for ProxyPac {
+	fn to_handler(&self, path: EndpointPath) -> Box<Handler> {
+		let content = format!(
+r#"
+function FindProxyForURL(url, host) {{
+	if (shExpMatch(host, "*{0}"))
+	{{
+		return "PROXY {1}:{2}";
+	}}
+
+	return "DIRECT";
+}}
+"#,
+			DAPPS_DOMAIN, path.host, path.port);
+		Box::new(ContentHandler::new(content, "application/javascript".to_owned()))
+	}
+}
+
+