do not set default headers

actix-http/src/client/connection.rs

@@ -12,7 +12,7 @@ use crate::message::{RequestHead, ResponseHead};
 use crate::payload::Payload;
 
 use super::error::SendRequestError;
-use super::pool::Acquired;
+use super::pool::{Acquired, Protocol};
 use super::{h1proto, h2proto};
 
 pub(crate) enum ConnectionType<Io> {
@@ -24,6 +24,8 @@ pub trait Connection {
     type Io: AsyncRead + AsyncWrite;
     type Future: Future<Item = (ResponseHead, Payload), Error = SendRequestError>;
 
+    fn protocol(&self) -> Protocol;
+
     /// Send request and body
     fn send_request<B: MessageBody + 'static>(
         self,
@@ -94,6 +96,14 @@ where
     type Io = T;
     type Future = Box<Future<Item = (ResponseHead, Payload), Error = SendRequestError>>;
 
+    fn protocol(&self) -> Protocol {
+        match self.io {
+            Some(ConnectionType::H1(_)) => Protocol::Http1,
+            Some(ConnectionType::H2(_)) => Protocol::Http2,
+            None => Protocol::Http1,
+        }
+    }
+
     fn send_request<B: MessageBody + 'static>(
         mut self,
         head: RequestHead,
@@ -161,6 +171,13 @@ where
     type Io = EitherIo<A, B>;
     type Future = Box<Future<Item = (ResponseHead, Payload), Error = SendRequestError>>;
 
+    fn protocol(&self) -> Protocol {
+        match self {
+            EitherConnection::A(con) => con.protocol(),
+            EitherConnection::B(con) => con.protocol(),
+        }
+    }
+
     fn send_request<RB: MessageBody + 'static>(
         self,
         head: RequestHead,

actix-http/src/client/h2proto.rs

@@ -107,7 +107,6 @@ where
             let mut head = ResponseHead::new(parts.status);
             head.version = parts.version;
             head.headers = parts.headers.into();
-
             Ok((head, payload))
         })
         .from_err()

actix-http/src/client/mod.rs

@@ -9,3 +9,4 @@ mod pool;
 pub use self::connection::Connection;
 pub use self::connector::Connector;
 pub use self::error::{ConnectError, InvalidUrl, SendRequestError};
+pub use self::pool::Protocol;

actix-http/src/client/pool.rs

@@ -21,8 +21,8 @@ use tokio_timer::{sleep, Delay};
 use super::connection::{ConnectionType, IoConnection};
 use super::error::ConnectError;
 
-#[allow(dead_code)]
 #[derive(Clone, Copy, PartialEq)]
+/// Protocol version
 pub enum Protocol {
     Http1,
     Http2,