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    // 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/>.

    use apps::DAPPS_DOMAIN;
    use hyper::{server, header, StatusCode};
    use hyper::net::HttpStream;

    use jsonrpc_http_server::{is_host_header_valid};
    use handlers::ContentHandler;

    pub fn is_valid(request: &server::Request<HttpStream>, allowed_hosts: &[String], endpoints: Vec<String>) -> bool {
    	let mut endpoints = endpoints.iter()
    		.map(|endpoint| format!("{}{}", endpoint, DAPPS_DOMAIN))
    		.collect::<Vec<String>>();
    	endpoints.extend_from_slice(allowed_hosts);

    	let header_valid = is_host_header_valid(request, &endpoints);

    	match (header_valid, request.headers().get::<header::Host>()) {
    		(true, _) => true,
    		(_, Some(host)) => host.hostname.ends_with(DAPPS_DOMAIN),
    		_ => false,
    	}
    }

    pub fn host_invalid_response() -> Box<server::Handler<HttpStream> + Send> {
    	Box::new(ContentHandler::error(StatusCode::Forbidden,
    		"Current Host Is Disallowed",
    		"You are trying to access your node using incorrect address.",
    		Some("Use allowed URL or specify different <code>hosts</code> CLI options."),
    		None,
    	))
    }

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