94 lines
2.3 KiB
Rust
94 lines
2.3 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Simple REST API
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use std::io::Write;
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use std::sync::Arc;
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use hyper::status::StatusCode;
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use hyper::{header, server, Decoder, Encoder, Next};
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use hyper::net::HttpStream;
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use endpoint::{Endpoint, Endpoints};
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pub struct RestApi {
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endpoints: Arc<Endpoints>,
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}
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impl RestApi {
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pub fn new(endpoints: Arc<Endpoints>) -> Box<Endpoint> {
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Box::new(RestApi {
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endpoints: endpoints
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})
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}
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fn list_pages(&self) -> String {
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let mut s = "[".to_owned();
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for name in self.endpoints.keys() {
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s.push_str(&format!("\"{}\",", name));
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}
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s.push_str("\"rpc\"");
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s.push_str("]");
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s
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}
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}
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impl Endpoint for RestApi {
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fn to_handler(&self, _prefix: &str) -> Box<server::Handler<HttpStream>> {
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Box::new(RestApiHandler {
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pages: self.list_pages(),
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write_pos: 0,
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})
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}
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}
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struct RestApiHandler {
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pages: String,
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write_pos: usize,
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}
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impl server::Handler<HttpStream> for RestApiHandler {
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fn on_request(&mut self, _request: server::Request) -> Next {
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Next::write()
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}
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fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
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Next::write()
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}
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fn on_response(&mut self, res: &mut server::Response) -> Next {
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res.set_status(StatusCode::Ok);
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res.headers_mut().set(header::ContentType("application/json".parse().unwrap()));
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Next::write()
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}
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fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
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let bytes = self.pages.as_bytes();
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if self.write_pos == bytes.len() {
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return Next::end();
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}
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match encoder.write(&bytes[self.write_pos..]) {
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Ok(bytes) => {
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self.write_pos += bytes;
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Next::write()
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},
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Err(e) => match e.kind() {
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::std::io::ErrorKind::WouldBlock => Next::write(),
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_ => Next::end()
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},
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}
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}
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}
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