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|
//! Transports for communicating with the docker daemon
extern crate hyper;
extern crate mime;
use hyper::Client;
use hyper::client;
use self::hyper::buffer::BufReader;
use self::hyper::header::ContentType;
use self::hyper::status::StatusCode;
use hyper::method::Method;
use self::mime::{Attr, Mime, Value};
use self::mime::TopLevel::Application;
use self::mime::SubLevel::Json;
use std::fmt;
use std::ops::DerefMut;
use std::io::{Error, ErrorKind, Read, Result, Write};
use hyperlocal::DomainUrl;
fn lift_status_err(status: u16) -> Result<Box<Read>> {
match status {
400 => Err(Error::new(ErrorKind::InvalidInput, "bad parameter")),
404 => Err(Error::new(ErrorKind::InvalidInput, "not found")),
406 => Err(Error::new(ErrorKind::InvalidInput, "not acceptable")),
409 => Err(Error::new(ErrorKind::InvalidInput, "conflict found")),
500 => Err(Error::new(ErrorKind::InvalidInput, "interal server error")),
_ => unreachable!(),
}
}
/// Transports are types which define the means of communication
/// with the docker daemon
pub enum Transport {
/// A network tcp interface
Tcp {
client: Client,
host: String,
},
/// A Unix domain socket
Unix {
client: Client,
path: String,
},
}
impl fmt::Debug for Transport {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Transport::Tcp { ref host, .. } => write!(f, "Tcp({})", host),
Transport::Unix { ref path, .. } => write!(f, "Unix({})", path),
}
}
}
impl Transport {
pub fn request(&self,
method: Method,
endpoint: &str,
body: Option<Body>)
-> Result<String> {
let mut res = match self.stream(method, endpoint, body) {
Ok(r) => r,
Err(e) => panic!("failed request {:?}", e),
};
let mut body = String::new();
res.read_to_string(&mut body).map(|_| body)
}
pub fn stream(&self,
method: Method,
endpoint: &str,
body: Option<Body>)
-> Result<Box<Read>> {
let req = match *self {
Transport::Tcp { ref client, ref host } => {
client.request(method, &format!("{}{}", host, endpoint)[..])
}
Transport::Unix { ref client, ref path } => {
client.request(method, DomainUrl::new(&path, endpoint))
}
};
let embodied = match body {
Some(Body { read: r, size: l }) => {
let reader: &mut Read = *r.deref_mut();
let content_type: Mime = Mime(Application,
Json,
vec![(Attr::Charset, Value::Utf8)]);
req.header(ContentType(content_type)).body(client::Body::SizedBody(reader, l))
}
_ => req,
};
let res = match embodied.send() {
Ok(r) => r,
Err(e) => panic!("failed request {:?}", e),
};
match res.status {
StatusCode::Ok | StatusCode::Created | StatusCode::SwitchingProtocols => {
Ok(Box::new(res))
}
StatusCode::NoContent => Ok(Box::new(BufReader::new("".as_bytes()))),
status => lift_status_err(status.to_u16()),
}
}
}
#[doc(hidden)]
pub struct Body<'a> {
read: &'a mut Box<&'a mut Read>,
size: u64,
}
impl<'a> Body<'a> {
/// Create a new body instance
pub fn new(read: &'a mut Box<&'a mut Read>, size: u64) -> Body<'a> {
Body {
read: read,
size: size,
}
}
}
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