openethereum/dapps/src/handlers/streaming.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/>.
//! Content Stream Response
use std::io;
use hyper::{self, header, mime, StatusCode};
use handlers::{add_security_headers, Reader};
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use Embeddable;
pub struct StreamingHandler<R> {
initial: Vec<u8>,
content: R,
status: StatusCode,
mimetype: mime::Mime,
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safe_to_embed_on: Embeddable,
}
impl<R: io::Read> StreamingHandler<R> {
pub fn new(content: R, status: StatusCode, mimetype: mime::Mime, safe_to_embed_on: Embeddable) -> Self {
StreamingHandler {
initial: Vec::new(),
content,
status,
mimetype,
safe_to_embed_on,
}
}
pub fn set_initial_content(&mut self, content: &str) {
self.initial = content.as_bytes().to_vec();
}
pub fn into_response(self) -> (Reader<R>, hyper::Response) {
let (reader, body) = Reader::pair(self.content, self.initial);
let mut res = hyper::Response::new()
.with_status(self.status)
.with_header(header::ContentType(self.mimetype))
.with_body(body);
add_security_headers(&mut res.headers_mut(), self.safe_to_embed_on);
(reader, res)
}
}