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// Copyright 2017 rust-ipfs-api Developers
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
//
use hyper;
use hyper::header::{self, Header, Raw};
use std::fmt;
/// Header that is returned for streaming calls.
///
/// A `Trailer` header indicates that after a streaming call, there will
/// be some additional information in the response.
///
#[derive(Debug, Clone, Copy)]
pub enum Trailer {
/// This trailer indicates that an error header will be returned in
/// the stream if there is an error while streaming.
///
StreamError,
}
impl Header for Trailer {
fn header_name() -> &'static str {
"Trailer"
}
fn parse_header(raw: &Raw) -> hyper::Result<Trailer> {
if let Some(bytes) = raw.one() {
let value = String::from_utf8_lossy(bytes);
match value.as_ref() {
"X-Stream-Error" => Ok(Trailer::StreamError),
_ => Err(hyper::Error::Header),
}
} else {
Err(hyper::Error::Header)
}
}
fn fmt_header(&self, f: &mut header::Formatter) -> fmt::Result {
let value = match *self {
Trailer::StreamError => "X-Stream-Error",
};
f.fmt_line(&value)
}
}
/// This header is included while streaming if an error occured
/// while streaming the data.
///
#[derive(Debug, Clone)]
pub struct XStreamError {
pub error: String,
}
impl Header for XStreamError {
fn header_name() -> &'static str {
"X-Stream-Error"
}
fn parse_header(raw: &Raw) -> hyper::Result<XStreamError> {
if let Some(bytes) = raw.one() {
let value = String::from_utf8_lossy(bytes);
Ok(XStreamError {
error: value.into_owned(),
})
} else {
Err(hyper::Error::Header)
}
}
fn fmt_header(&self, f: &mut header::Formatter) -> fmt::Result {
f.fmt_line(&self.error)
}
}
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