UI server refactoring (#5580)

* Full API in Authenticated WS server.

* Replacing UI server with Hyper.

* Solving CLI, RPCs and tests.

* Porting signer tests.

* Fixing origin recognition for dapps/rpc.

* Fixing tests. Adding parity-rpc-client to test.

* Dapps exposed as RPC method.

* JS code to support new connection scheme.

* Fixing dapps tests.

* Updating allowed origins/hosts to support web3.site.

* Fixing tests, fixing UI.

* Fixing tests.

* Removing invalid tests.

* Fixing merge.

* 404 fallback for UI

* Improve ContentFetcher constructor readability.

* Naming.

* Update .gitlab-ci.yml

fix CI lint error

* Fixing tests and linting issues.

* Fixing new tests.

* UI hosts.

* Submodules fix.

dapps/src/apps/ui.rs

@@ -0,0 +1,55 @@
+// Copyright 2015-2017 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 <http://www.gnu.org/licenses/>.
+
+//! UI redirections
+
+use hyper::{Control, StatusCode};
+
+use endpoint::{Endpoint, Handler, EndpointPath};
+use {address, handlers};
+
+/// Redirection to UI server.
+pub struct Redirection {
+	signer_address: Option<(String, u16)>,
+}
+
+impl Redirection {
+	pub fn new(
+		signer_address: Option<(String, u16)>,
+	) -> Self {
+		Redirection {
+			signer_address: signer_address,
+		}
+	}
+}
+
+impl Endpoint for Redirection {
+	fn to_async_handler(&self, _path: EndpointPath, _control: Control) -> Box<Handler> {
+		if let Some(ref signer_address) = self.signer_address {
+			trace!(target: "dapps", "Redirecting to signer interface.");
+			handlers::Redirection::boxed(&format!("http://{}", address(signer_address)))
+		} else {
+			trace!(target: "dapps", "Signer disabled, returning 404.");
+			Box::new(handlers::ContentHandler::error(
+				StatusCode::NotFound,
+				"404 Not Found",
+				"Your homepage is not available when Trusted Signer is disabled.",
+				Some("You can still access dapps by writing a correct address, though. Re-enable Signer to get your homepage back."),
+				self.signer_address.clone(),
+			))
+		}
+	}
+}