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

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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/>.
//! Test implementation of fetch client.
use std::{io, thread};
use jsonrpc_core::futures::{self, Future};
use fetch::{self, Fetch};
/// 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 new() -> Result<Self, fetch::Error> where Self: Sized {
Ok(TestFetch)
}
fn fetch_with_abort(&self, _url: &str, _abort: fetch::Abort) -> Self::Result {
let (tx, rx) = futures::oneshot();
thread::spawn(move || {
let cursor = io::Cursor::new(b"Some content");
tx.send(fetch::Response::from_reader(cursor)).unwrap();
});
Box::new(rx.map_err(|_| fetch::Error::Aborted))
}
}