openethereum/rpc/src/v1/tests/helpers/fetch.rs

// 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/>.

//! Test implementation of fetch client.

use std::thread;
use std::boxed::Box;
use jsonrpc_core::futures::{self, Future};
use fetch::{self, Fetch, Url, Request};
use futures::future;
use hyper;

/// Test implementation of fetcher. Will always return the same file.
#[derive(Default, Clone)]
pub struct TestFetch;

impl Fetch for TestFetch {
	type Result = Box<Future<Item = fetch::Response, Error = fetch::Error> + Send + 'static>;

	fn fetch(&self, request: Request, abort: fetch::Abort) -> Self::Result {
		let u = request.url().clone();
		let (tx, rx) = futures::oneshot();
		thread::spawn(move || {
			let r = hyper::Response::new().with_body(&b"Some content"[..]);
			tx.send(fetch::Response::new(u, r, abort)).unwrap();
		});

		Box::new(rx.map_err(|_| fetch::Error::Aborted))
	}

	fn get(&self, url: &str, abort: fetch::Abort) -> Self::Result {
		let url: Url = match url.parse() {
			Ok(u) => u,
			Err(e) => return Box::new(future::err(e.into()))
		};
		self.fetch(Request::get(url), abort)
	}

	fn post(&self, url: &str, abort: fetch::Abort) -> Self::Result {
		let url: Url = match url.parse() {
			Ok(u) => u,
			Err(e) => return Box::new(future::err(e.into()))
		};
		self.fetch(Request::post(url), abort)
	}
}