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use std::io::{Read, Write};
use std::net::{SocketAddr, TcpStream, ToSocketAddrs};
use std::result::Result as StdResult;
use http::Uri;
use log::*;
use url::Url;
use crate::handshake::client::{Request, Response};
use crate::protocol::WebSocketConfig;
#[cfg(feature = "tls")]
mod encryption {
pub use native_tls::TlsStream;
use native_tls::{HandshakeError as TlsHandshakeError, TlsConnector};
use std::net::TcpStream;
pub use crate::stream::Stream as StreamSwitcher;
pub type AutoStream = StreamSwitcher<TcpStream, TlsStream<TcpStream>>;
use crate::error::Result;
use crate::stream::Mode;
pub fn wrap_stream(stream: TcpStream, domain: &str, mode: Mode) -> Result<AutoStream> {
match mode {
Mode::Plain => Ok(StreamSwitcher::Plain(stream)),
Mode::Tls => {
let connector = TlsConnector::builder().build()?;
connector
.connect(domain, stream)
.map_err(|e| match e {
TlsHandshakeError::Failure(f) => f.into(),
TlsHandshakeError::WouldBlock(_) => {
panic!("Bug: TLS handshake not blocked")
}
})
.map(StreamSwitcher::Tls)
}
}
}
}
#[cfg(not(feature = "tls"))]
mod encryption {
use std::net::TcpStream;
use crate::error::{Error, Result};
use crate::stream::Mode;
pub type AutoStream = TcpStream;
pub fn wrap_stream(stream: TcpStream, _domain: &str, mode: Mode) -> Result<AutoStream> {
match mode {
Mode::Plain => Ok(stream),
Mode::Tls => Err(Error::Url("TLS support not compiled in.".into())),
}
}
}
use self::encryption::wrap_stream;
pub use self::encryption::AutoStream;
use crate::error::{Error, Result};
use crate::handshake::client::ClientHandshake;
use crate::handshake::HandshakeError;
use crate::protocol::WebSocket;
use crate::stream::{Mode, NoDelay};
pub fn connect_with_config<Req: IntoClientRequest>(
request: Req,
config: Option<WebSocketConfig>,
) -> Result<(WebSocket<AutoStream>, Response)> {
let request: Request = request.into_client_request()?;
let uri = request.uri();
let mode = uri_mode(uri)?;
let host = request
.uri()
.host()
.ok_or_else(|| Error::Url("No host name in the URL".into()))?;
let port = uri.port_u16().unwrap_or(match mode {
Mode::Plain => 80,
Mode::Tls => 443,
});
let addrs = (host, port).to_socket_addrs()?;
let mut stream = connect_to_some(addrs.as_slice(), &request.uri(), mode)?;
NoDelay::set_nodelay(&mut stream, true)?;
client_with_config(request, stream, config).map_err(|e| match e {
HandshakeError::Failure(f) => f,
HandshakeError::Interrupted(_) => panic!("Bug: blocking handshake not blocked"),
})
}
pub fn connect<Req: IntoClientRequest>(request: Req) -> Result<(WebSocket<AutoStream>, Response)> {
connect_with_config(request, None)
}
fn connect_to_some(addrs: &[SocketAddr], uri: &Uri, mode: Mode) -> Result<AutoStream> {
let domain = uri
.host()
.ok_or_else(|| Error::Url("No host name in the URL".into()))?;
for addr in addrs {
debug!("Trying to contact {} at {}...", uri, addr);
if let Ok(raw_stream) = TcpStream::connect(addr) {
if let Ok(stream) = wrap_stream(raw_stream, domain, mode) {
return Ok(stream);
}
}
}
Err(Error::Url(format!("Unable to connect to {}", uri).into()))
}
pub fn uri_mode(uri: &Uri) -> Result<Mode> {
match uri.scheme_str() {
Some("ws") => Ok(Mode::Plain),
Some("wss") => Ok(Mode::Tls),
_ => Err(Error::Url("URL scheme not supported".into())),
}
}
pub fn client_with_config<Stream, Req>(
request: Req,
stream: Stream,
config: Option<WebSocketConfig>,
) -> StdResult<(WebSocket<Stream>, Response), HandshakeError<ClientHandshake<Stream>>>
where
Stream: Read + Write,
Req: IntoClientRequest,
{
ClientHandshake::start(stream, request.into_client_request()?, config)?.handshake()
}
pub fn client<Stream, Req>(
request: Req,
stream: Stream,
) -> StdResult<(WebSocket<Stream>, Response), HandshakeError<ClientHandshake<Stream>>>
where
Stream: Read + Write,
Req: IntoClientRequest,
{
client_with_config(request, stream, None)
}
pub trait IntoClientRequest {
fn into_client_request(self) -> Result<Request>;
}
impl<'a> IntoClientRequest for &'a str {
fn into_client_request(self) -> Result<Request> {
let uri: Uri = self.parse()?;
Ok(Request::get(uri).body(())?)
}
}
impl<'a> IntoClientRequest for &'a String {
fn into_client_request(self) -> Result<Request> {
let uri: Uri = self.parse()?;
Ok(Request::get(uri).body(())?)
}
}
impl IntoClientRequest for String {
fn into_client_request(self) -> Result<Request> {
let uri: Uri = self.parse()?;
Ok(Request::get(uri).body(())?)
}
}
impl<'a> IntoClientRequest for &'a Uri {
fn into_client_request(self) -> Result<Request> {
Ok(Request::get(self.clone()).body(())?)
}
}
impl IntoClientRequest for Uri {
fn into_client_request(self) -> Result<Request> {
Ok(Request::get(self).body(())?)
}
}
impl<'a> IntoClientRequest for &'a Url {
fn into_client_request(self) -> Result<Request> {
let uri: Uri = self.as_str().parse()?;
Ok(Request::get(uri).body(())?)
}
}
impl IntoClientRequest for Url {
fn into_client_request(self) -> Result<Request> {
let uri: Uri = self.as_str().parse()?;
Ok(Request::get(uri).body(())?)
}
}
impl IntoClientRequest for Request {
fn into_client_request(self) -> Result<Request> {
Ok(self)
}
}
impl<'h, 'b> IntoClientRequest for httparse::Request<'h, 'b> {
fn into_client_request(self) -> Result<Request> {
use crate::handshake::headers::FromHttparse;
Request::from_httparse(self)
}
}