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pub extern crate futures;
pub extern crate tokio_core;
pub extern crate url;
#[macro_use]
extern crate nom;
use std::borrow::Cow;
use std::fmt;
use std::io::{self, Error, ErrorKind, Write};
use std::net::{SocketAddr, ToSocketAddrs};
use futures::{Future, Sink, Stream};
use tokio_core::io::{EasyBuf, Codec, Framed, Io, IoFuture};
pub mod prelude {
pub use tokio_core::io::Io;
pub use tokio_core::net::TcpStream;
pub use tokio_core::reactor::Core;
pub use futures::{Future, Sink, Stream, IntoFuture};
pub use futures::future::{BoxFuture, empty, err, lazy, ok, result};
}
use url::{Url, ParseError};
use nom::IResult;
mod parser;
mod response;
pub use response::{HttpResponse, Header};
pub struct HttpRequest {
url: Url,
method: Method,
headers: Vec<(Cow<'static, str>, Cow<'static, str>)>,
body: Vec<u8>
}
pub enum Method {
Get,
Head,
Post,
Put,
Delete,
Connect,
Options,
Trace,
Other(String)
}
impl fmt::Display for Method {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use Method::*;
match *self {
Get => write!(f, "GET"),
Head => write!(f, "HEAD"),
Post => write!(f, "POST"),
Put => write!(f, "PUT"),
Delete => write!(f, "DELETE"),
Connect => write!(f, "CONNECT"),
Options => write!(f, "OPTIONS"),
Trace => write!(f, "TRACE"),
Other(ref other) => write!(f, "{}", other)
}
}
}
impl HttpRequest {
pub fn new<U: AsRef<str>>(method: Method, url: U) -> Result<HttpRequest, ParseError> {
url.as_ref().parse().map(|url: Url| {
use std::fmt::Write;
let mut host = url.host_str().unwrap_or("").to_string();
if let Some(port) = url.port() {
write!(host, ":{}", port).unwrap();
}
HttpRequest {
url: url,
method: method,
headers: vec![],
body: vec![]
}.header("Host", host)
})
}
pub fn header<K: Into<Cow<'static, str>>, V: Into<Cow<'static, str>>>(mut self, name: K, value: V) -> HttpRequest {
self.headers.push((name.into(), value.into()));
self
}
pub fn get<U: AsRef<str>>(url: U) -> Result<HttpRequest, ParseError> {
Self::new(Method::Get, url)
}
pub fn post<U: AsRef<str>, I: Into<Vec<u8>>>(url: U, body: I) -> Result<HttpRequest, ParseError> {
let bytes = body.into();
let mut req = Self::new(Method::Post, url)?.header("Content-Length", bytes.len().to_string());
req.body = bytes;
Ok(req)
}
pub fn addr(&self) -> Result<SocketAddr, Error> {
let mut addrs = self.url.to_socket_addrs()?;
addrs.next().ok_or(Error::new(ErrorKind::UnexpectedEof, "no address"))
}
pub fn send<T: 'static + Io + Send>(self, framed: Framed<T, HttpCodec>) -> IoFuture<(Option<HttpResponse>, Framed<T, HttpCodec>)> {
framed.send(self).and_then(|framed| {
framed.into_future().and_then(|(res, stream)| {
Ok((res, stream))
}).map_err(|(err, _stream)| err)
}).boxed()
}
}
impl fmt::Display for HttpRequest {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{} {}", self.method, self.url.path())?;
if let Some(query) = self.url.query() {
write!(f, "?{}", query)?;
}
if let Some(fragment) = self.url.fragment() {
write!(f, "#{}", fragment)?;
}
write!(f, " HTTP/1.1\r\n")?;
for &(ref name, ref value) in &self.headers {
write!(f, "{}: {}\r\n", name, value)?;
}
write!(f, "\r\n")
}
}
#[derive(Debug)]
pub struct HttpCodec {
response: Option<HttpResponse>,
bytes_left: usize
}
impl HttpCodec {
pub fn new() -> HttpCodec {
HttpCodec {
response: None,
bytes_left: 0
}
}
fn decode_header(&mut self, buf: &mut EasyBuf) -> Result<Option<HttpResponse>, Error> {
let (bytes_left, response) = match parser::response(buf.as_ref()) {
IResult::Incomplete(_) => return Ok(None),
IResult::Error(e) => return Err(Error::new(ErrorKind::InvalidData, e)),
IResult::Done(rest, response) => (rest.len(), response)
};
let after_header = buf.len() - bytes_left;
buf.drain_to(after_header);
if response.is_informational() || response.status() == 204 ||
response.status() == 304 {
assert!(bytes_left == 0);
return Ok(Some(response));
}
if response.has("Transfer-Encoding", "chunked") {
unimplemented!()
}
let length =
if let Some(ref length) = response["Content-Length"] {
Some(length.parse::<usize>().map_err(|e| Error::new(ErrorKind::InvalidData, e))?)
} else {
None
};
if let Some(length) = length {
self.response = Some(response);
self.bytes_left = length;
return self.decode(buf);
} else {
unimplemented!()
}
}
}
impl Codec for HttpCodec {
type In = HttpResponse;
type Out = HttpRequest;
fn decode(&mut self, buf: &mut EasyBuf) -> Result<Option<HttpResponse>, Error> {
if self.response.is_none() {
self.decode_header(buf)
} else {
let buf_len = buf.len();
println!("{} bytes left to read, got {} bytes", self.bytes_left, buf_len);
if buf_len > self.bytes_left {
Err(Error::new(ErrorKind::InvalidData, "extraneous data"))
} else {
self.response.as_mut().map(|res| response::append(res, buf.drain_to(buf_len).as_slice()));
if buf_len == self.bytes_left {
Ok(self.response.take())
} else {
self.bytes_left -= buf_len;
Ok(None)
}
}
}
}
fn encode(&mut self, msg: HttpRequest, buf: &mut Vec<u8>) -> io::Result<()> {
write!(buf, "{}", msg)?;
buf.extend_from_slice(&msg.body);
Ok(())
}
}
#[cfg(test)]
mod tests {
extern crate env_logger;
use std::io::{Error, ErrorKind};
use std::thread;
use std::time::Duration;
use super::prelude::*;
use super::futures::sync::mpsc;
use {HttpRequest, HttpCodec};
#[test]
fn channel() {
let string = "http://localhost:3000/post-test".to_string();
let req = HttpRequest::post(&string, vec![1, 2, 3, 4]).unwrap()
.header("Content-Type", "text/plain");
let mut core = Core::new().unwrap();
let addr = req.addr().unwrap();
let handle = core.handle();
let (mut sender, receiver) = mpsc::channel(1);
thread::spawn(|| {
for i in 0 .. 4 {
let url = "http://localhost:3000/post-test";
let elements = (0 .. (i + 1)).collect::<Vec<_>>();
let req = HttpRequest::post(url, elements).unwrap()
.header("Content-Type", "text/plain");
sender = sender.send(req).wait().unwrap();
thread::sleep(Duration::from_millis(100));
}
});
let _framed = core.run(TcpStream::connect(&addr, &handle).and_then(|connection| {
let framed = connection.framed(HttpCodec::new());
receiver.fold(framed, |framed, req| {
req.send(framed).and_then(|(res, framed)| {
println!("channel got response {}", res.unwrap());
Ok(framed)
}).map_err(|_| ())
}).map_err(|()| Error::new(ErrorKind::Other, "oops"))
})).unwrap();
}
#[test]
fn two_frames() {
let string = "http://localhost:3000/post-test".to_string();
let req = HttpRequest::post(&string, vec![1, 2, 3, 4, 5, 6]).unwrap()
.header("Content-Type", "text/plain");
let mut core = Core::new().unwrap();
let addr = req.addr().unwrap();
let handle = core.handle();
let (res, framed) = core.run(TcpStream::connect(&addr, &handle).and_then(|connection| {
let framed = connection.framed(HttpCodec::new());
req.send(framed)
})).unwrap();
println!("hello 1 {}", res.unwrap());
thread::sleep(Duration::from_secs(1));
let req = HttpRequest::get("http://localhost:3000/").unwrap();
let (res, _framed) = core.run(req.send(framed)).unwrap();
if let Some(res) = res {
println!("hello 2 {}", res);
assert!(res.is("Connection", "close"));
} else {
assert!(false);
}
}
}