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Sean McArthur
2016-06-30 17:23:51 -07:00
commit 9bfdcec052
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target
Cargo.lock

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[package]
name = "request"
version = "0.1.0"
authors = ["Sean McArthur <sean.monstar@gmail.com>"]
license = "MIT/Apache-2.0"
[dependencies]
hyper = {git = "https://github.com/hyperium/hyper"}
log = "0.3"
[dev-dependencies]
env_logger = "0.3"

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Copyright (c) 2015
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# request
An ergonomic HTTP Client for Rust

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extern crate request;
extern crate env_logger;
fn main() {
env_logger::init().unwrap();
let mut res = request::get("https://rust-lang.org").unwrap();
println!("Status: {}", res.status());
println!("Headers:\n{}", res.headers());
::std::io::copy(&mut res, &mut ::std::io::stdout()).unwrap();
println!("\n\nDone.");
}

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use std::io::{self, Read};
use hyper::{Method, StatusCode, HttpVersion, Url};
use hyper::header::Headers;
use super::sync;
pub struct Client {
inner: sync::Client,
}
impl Client {
pub fn new() -> Client {
Client {
inner: sync::Client::new(),
}
}
pub fn get(&self, url: &str) -> RequestBuilder {
self.request(Method::Get, Url::parse(url).unwrap())
}
pub fn request(&self, method: Method, url: Url) -> RequestBuilder {
debug!("request {:?} \"{}\"", method, url);
RequestBuilder {
client: self,
method: method,
url: url,
version: HttpVersion::Http11,
headers: Headers::new(),
body: None,
}
}
}
pub struct RequestBuilder<'a> {
client: &'a Client,
method: Method,
url: Url,
version: HttpVersion,
headers: Headers,
body: Option<()>,
}
impl<'a> RequestBuilder<'a> {
pub fn body(mut self, body: ()) -> RequestBuilder<'a> {
self.body = Some(body);
self
}
pub fn send(mut self) -> Result<Response, String> {
self.headers.set(::hyper::header::ContentLength(0));
let req = try!(self.client.inner.request(self.method, self.url, self.version, self.headers));
let res = try!(req.end().map_err(|e| format!("RequestError: end: {}", e)));
Ok(Response {
inner: res
})
}
}
pub struct Response {
inner: sync::Response,
}
impl Response {
pub fn status(&self) -> &StatusCode {
&self.inner.status
}
pub fn headers(&self) -> &Headers {
&self.inner.headers
}
pub fn version(&self) -> &HttpVersion {
&self.inner.version
}
}
impl Read for Response {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
self.inner.read(buf)
}
}

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extern crate hyper;
#[macro_use] extern crate log;
pub use hyper::{Method, StatusCode, header, Url};
pub use self::client::{Client, Response};
mod client;
mod sync;
pub fn get(url: &str) -> Result<Response, String> {
let client = Client::new();
client.get(url).send()
}

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use std::io::{self, Read, Write};
use std::sync::mpsc;
use std::time::Duration;
use hyper::{self, Control, Next, Method, StatusCode, HttpVersion, RequestUri, Url};
use hyper::header::Headers;
pub struct Client {
inner: hyper::Client<SynchronousHandler>,
}
impl Client {
pub fn new() -> Client {
Client {
inner: hyper::Client::<SynchronousHandler>::configure()
.connect_timeout(Duration::from_secs(10))
.build().unwrap(),
}
}
pub fn request(&self, method: Method, url: Url, version: HttpVersion, headers: Headers) -> Result<Request, String> {
let (ctrl_tx, ctrl_rx) = mpsc::channel();
let (res_tx, res_rx) = mpsc::channel();
let (action_tx, rx) = mpsc::channel();
let (tx, action_rx) = mpsc::channel();
let timeout = Duration::from_secs(10);
try!(self.inner.request(url, SynchronousHandler {
read_timeout: timeout,
write_timeout: timeout,
ctrl_tx: ctrl_tx,
res_tx: res_tx,
tx: tx,
rx: rx,
reading: None,
writing: None,
request: Some((method, version, headers)),
}).map_err(|e| format!("RequestError: {}", e)));
Ok(Request {
res_rx: res_rx,
tx: action_tx,
rx: action_rx,
ctrl: try!(ctrl_rx.recv().map_err(|e| format!("RequestError: waiting for Control: {}", e))),
})
}
}
pub struct Request {
res_rx: mpsc::Receiver<hyper::client::Response>,
tx: mpsc::Sender<Action>,
rx: mpsc::Receiver<io::Result<usize>>,
ctrl: hyper::Control,
}
impl Request {
pub fn end(self) -> Result<Response, String> {
trace!("Request.end");
self.ctrl.ready(Next::read()).unwrap();
let res = try!(self.res_rx.recv().map_err(|e| format!("RequestError: end = {}", e)));
Ok(Response {
status: res.status().clone(),
headers: res.headers().clone(),
version: res.version().clone(),
tx: self.tx,
rx: self.rx,
ctrl: self.ctrl,
})
}
}
impl Write for Request {
fn write(&mut self, msg: &[u8]) -> io::Result<usize> {
self.tx.send(Action::Write(msg.as_ptr(), msg.len())).unwrap();
self.ctrl.ready(Next::write()).unwrap();
let res = self.rx.recv().unwrap();
res
}
fn flush(&mut self) -> io::Result<()> {
panic!("Request.flush() not implemented")
}
}
pub struct Response {
pub headers: Headers,
pub status: StatusCode,
pub version: HttpVersion,
tx: mpsc::Sender<Action>,
rx: mpsc::Receiver<io::Result<usize>>,
ctrl: hyper::Control,
}
impl Read for Response {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
self.tx.send(Action::Read(buf.as_mut_ptr(), buf.len())).unwrap();
self.ctrl.ready(Next::read()).unwrap();
self.rx.recv().unwrap()
}
}
struct SynchronousHandler {
read_timeout: Duration,
write_timeout: Duration,
ctrl_tx: mpsc::Sender<Control>,
res_tx: mpsc::Sender<hyper::client::Response>,
tx: mpsc::Sender<io::Result<usize>>,
rx: mpsc::Receiver<Action>,
reading: Option<(*mut u8, usize)>,
writing: Option<(*const u8, usize)>,
request: Option<(hyper::Method, hyper::HttpVersion, hyper::Headers)>
}
unsafe impl Send for SynchronousHandler {}
impl SynchronousHandler {
fn next(&mut self) -> Next {
match self.rx.try_recv() {
Ok(Action::Read(ptr, len)) => {
self.reading = Some((ptr, len));
Next::read().timeout(self.read_timeout)
},
Ok(Action::Write(ptr, len)) => {
self.writing = Some((ptr, len));
Next::write().timeout(self.write_timeout)
}
Err(mpsc::TryRecvError::Empty) => {
// we're too fast, the other thread hasn't had a chance to respond
Next::wait()
}
Err(mpsc::TryRecvError::Disconnected) => {
// they dropped it
Next::end()
}
}
}
fn reading(&mut self) -> Option<(*mut u8, usize)> {
self.reading.take().or_else(|| {
match self.rx.try_recv() {
Ok(Action::Read(ptr, len)) => {
Some((ptr, len))
},
_ => None
}
})
}
fn writing(&mut self) -> Option<(*const u8, usize)> {
self.writing.take().or_else(|| {
match self.rx.try_recv() {
Ok(Action::Write(ptr, len)) => {
Some((ptr, len))
},
_ => None
}
})
}
}
impl hyper::client::Handler<hyper::client::DefaultTransport> for SynchronousHandler {
fn on_request(&mut self, req: &mut hyper::client::Request) -> Next {
use std::iter::Extend;
let head = self.request.take().unwrap();
trace!("on_request {:?}", head);
req.set_method(head.0);
//req.set_uri(head.1);
req.headers_mut().extend(head.2.iter());
self.next()
}
fn on_request_writable(&mut self, encoder: &mut hyper::Encoder<hyper::client::DefaultTransport>) -> Next {
trace!("on_request_writable");
if let Some(raw) = self.writing() {
let slice = unsafe { ::std::slice::from_raw_parts(raw.0, raw.1) };
if self.tx.send(encoder.write(slice)).is_err() {
return Next::end();
}
}
self.next()
}
fn on_response(&mut self, res: hyper::client::Response) -> Next {
trace!("on_response {:?}", res);
if let Err(_) = self.res_tx.send(res) {
return Next::end();
}
self.next()
}
fn on_response_readable(&mut self, decoder: &mut hyper::Decoder<hyper::client::DefaultTransport>) -> Next {
trace!("on_response_readable");
if let Some(raw) = self.reading() {
let slice = unsafe { ::std::slice::from_raw_parts_mut(raw.0, raw.1) };
if self.tx.send(decoder.read(slice)).is_err() {
return Next::end();
}
}
self.next()
}
fn on_control(&mut self, ctrl: Control) {
self.ctrl_tx.send(ctrl).unwrap();
}
}
enum Action {
Read(*mut u8, usize),
Write(*const u8, usize),
//Request(Method, RequestUri, HttpVersion, Headers),
}
unsafe impl Send for Action {}
#[cfg(test)]
mod tests {
use std::io::{Read, Write};
use std::net::TcpListener;
use std::thread;
#[test]
fn test_get() {
let server = TcpListener::bind("127.0.0.1:0").unwrap();
let addr = server.local_addr().unwrap();
thread::spawn(move || {
let mut inc = server.accept().unwrap().0;
let mut buf = [0; 4096];
inc.read(&mut buf).unwrap();
});
let mut res = super::super::get(&format!("http://{}", addr)).unwrap();
assert_eq!(res.status(), &::hyper::Ok);
let mut buf = Vec::new();
res.read_to_end(&mut buf).unwrap();
}
}