Add req field to Unit and remove cloned parts from request (#158)

Instead of cloning most of `Request`'s fields individually when
creating a `Unit`, this PR switches to just cloning `Request` and
stuffing it in `Unit`, and changes references to `unit.[field]` to
`unit.req.[field]` where appropriate.

Fixes #155

src/pool.rs

@@ -394,7 +394,7 @@ impl<R: Read + Sized + Into<Stream>> PoolReturnRead<R> {
     fn return_connection(&mut self) {
         // guard we only do this once.
         if let (Some(unit), Some(reader)) = (self.unit.take(), self.reader.take()) {
-            let state = &mut unit.agent.lock().unwrap();
+            let state = &mut unit.req.agent.lock().unwrap();
             // bring back stream here to either go into pool or dealloc
             let stream = reader.into();
             if !stream.is_poolable() {
@@ -402,7 +402,7 @@ impl<R: Read + Sized + Into<Stream>> PoolReturnRead<R> {
                 return;
             }
             // insert back into pool
-            let key = PoolKey::new(&unit.url, &unit.proxy);
+            let key = PoolKey::new(&unit.url, &unit.req.proxy);
             state.pool().add(key, stream);
         }
     }

src/stream.rs

@@ -343,8 +343,12 @@ pub(crate) fn connect_https(unit: &Unit) -> Result<Stream, Error> {
 
     let sni = webpki::DNSNameRef::try_from_ascii_str(hostname)
         .map_err(|err| Error::DnsFailed(err.to_string()))?;
-    let tls_conf: &Arc<rustls::ClientConfig> =
+    let tls_conf: &Arc<rustls::ClientConfig> = unit
-        unit.tls_config.as_ref().map(|c| &c.0).unwrap_or(&*TLS_CONF);
+        .req
+        .tls_config
+        .as_ref()
+        .map(|c| &c.0)
+        .unwrap_or(&*TLS_CONF);
     let sess = rustls::ClientSession::new(&tls_conf, sni);
 
     let sock = connect_host(unit, hostname, port)?;
@@ -362,7 +366,7 @@ pub(crate) fn connect_https(unit: &Unit) -> Result<Stream, Error> {
     let port = unit.url.port().unwrap_or(443);
     let sock = connect_host(unit, hostname, port)?;
 
-    let tls_connector: Arc<native_tls::TlsConnector> = match &unit.tls_connector {
+    let tls_connector: Arc<native_tls::TlsConnector> = match &unit.req.tls_connector {
         Some(connector) => connector.0.clone(),
         None => Arc::new(native_tls::TlsConnector::new().map_err(|e| Error::TlsError(e))?),
     };
@@ -377,14 +381,14 @@ pub(crate) fn connect_https(unit: &Unit) -> Result<Stream, Error> {
 }
 
 pub(crate) fn connect_host(unit: &Unit, hostname: &str, port: u16) -> Result<TcpStream, Error> {
-    let deadline: Option<Instant> = if unit.timeout_connect > 0 {
+    let deadline: Option<Instant> = if unit.req.timeout_connect > 0 {
-        Instant::now().checked_add(Duration::from_millis(unit.timeout_connect))
+        Instant::now().checked_add(Duration::from_millis(unit.req.timeout_connect))
     } else {
         unit.deadline
     };
 
     // TODO: Find a way to apply deadline to DNS lookup.
-    let sock_addrs: Vec<SocketAddr> = match unit.proxy {
+    let sock_addrs: Vec<SocketAddr> = match unit.req.proxy {
         Some(ref proxy) => format!("{}:{}", proxy.server, proxy.port),
         None => format!("{}:{}", hostname, port),
     }
@@ -396,7 +400,7 @@ pub(crate) fn connect_host(unit: &Unit, hostname: &str, port: u16) -> Result<Tcp
         return Err(Error::DnsFailed(format!("No ip address for {}", hostname)));
     }
 
-    let proto = if let Some(ref proxy) = unit.proxy {
+    let proto = if let Some(ref proxy) = unit.req.proxy {
         Some(proxy.proto)
     } else {
         None
@@ -415,7 +419,7 @@ pub(crate) fn connect_host(unit: &Unit, hostname: &str, port: u16) -> Result<Tcp
         // connect with a configured timeout.
         let stream = if Some(Proto::SOCKS5) == proto {
             connect_socks5(
-                unit.proxy.to_owned().unwrap(),
+                unit.req.proxy.to_owned().unwrap(),
                 deadline,
                 sock_addr,
                 hostname,
@@ -448,9 +452,9 @@ pub(crate) fn connect_host(unit: &Unit, hostname: &str, port: u16) -> Result<Tcp
         stream
             .set_read_timeout(Some(time_until_deadline(deadline)?))
             .ok();
-    } else if unit.timeout_read > 0 {
+    } else if unit.req.timeout_read > 0 {
         stream
-            .set_read_timeout(Some(Duration::from_millis(unit.timeout_read as u64)))
+            .set_read_timeout(Some(Duration::from_millis(unit.req.timeout_read as u64)))
             .ok();
     } else {
         stream.set_read_timeout(None).ok();
@@ -460,16 +464,16 @@ pub(crate) fn connect_host(unit: &Unit, hostname: &str, port: u16) -> Result<Tcp
         stream
             .set_write_timeout(Some(time_until_deadline(deadline)?))
             .ok();
-    } else if unit.timeout_write > 0 {
+    } else if unit.req.timeout_write > 0 {
         stream
-            .set_write_timeout(Some(Duration::from_millis(unit.timeout_write as u64)))
+            .set_write_timeout(Some(Duration::from_millis(unit.req.timeout_write as u64)))
             .ok();
     } else {
         stream.set_write_timeout(None).ok();
     }
 
     if proto == Some(Proto::HTTPConnect) {
-        if let Some(ref proxy) = unit.proxy {
+        if let Some(ref proxy) = unit.req.proxy {
             write!(stream, "{}", proxy.connect(hostname, port)).unwrap();
             stream.flush()?;
 

src/test/redirect.rs

@@ -46,7 +46,7 @@ fn redirect_head() {
         test::make_response(302, "Go here", vec!["Location: /redirect_head2"], vec![])
     });
     test::set_handler("/redirect_head2", |unit| {
-        assert_eq!(unit.method, "HEAD");
+        assert_eq!(unit.req.method, "HEAD");
         test::make_response(200, "OK", vec!["x-foo: bar"], vec![])
     });
     let resp = head("test://host/redirect_head1").call();
@@ -62,7 +62,7 @@ fn redirect_get() {
         test::make_response(302, "Go here", vec!["Location: /redirect_get2"], vec![])
     });
     test::set_handler("/redirect_get2", |unit| {
-        assert_eq!(unit.method, "GET");
+        assert_eq!(unit.req.method, "GET");
         assert!(unit.has("Range"));
         assert_eq!(unit.header("Range").unwrap(), "bytes=10-50");
         test::make_response(200, "OK", vec!["x-foo: bar"], vec![])
@@ -82,7 +82,7 @@ fn redirect_post() {
         test::make_response(302, "Go here", vec!["Location: /redirect_post2"], vec![])
     });
     test::set_handler("/redirect_post2", |unit| {
-        assert_eq!(unit.method, "GET");
+        assert_eq!(unit.req.method, "GET");
         test::make_response(200, "OK", vec!["x-foo: bar"], vec![])
     });
     let resp = post("test://host/redirect_post1").call();

src/unit.rs

@@ -1,5 +1,4 @@
 use std::io::{Result as IoResult, Write};
-use std::sync::{Arc, Mutex};
 use std::time;
 
 use qstring::QString;
@@ -12,15 +11,8 @@ use crate::agent::AgentState;
 use crate::body::{self, Payload, SizedReader};
 use crate::header;
 use crate::stream::{self, connect_test, Stream};
-use crate::Proxy;
 use crate::{Error, Header, Request, Response};
 
-#[cfg(feature = "tls")]
-use crate::request::TLSClientConfig;
-
-#[cfg(all(feature = "native-tls", not(feature = "tls")))]
-use crate::request::TLSConnector;
-
 #[cfg(feature = "cookie")]
 use crate::pool::DEFAULT_HOST;
 
@@ -28,21 +20,12 @@ use crate::pool::DEFAULT_HOST;
 ///
 /// *Internal API*
 pub(crate) struct Unit {
-    pub agent: Arc<Mutex<AgentState>>,
+    pub req: Request,
     pub url: Url,
     pub is_chunked: bool,
     pub query_string: String,
     pub headers: Vec<Header>,
-    pub timeout_connect: u64,
-    pub timeout_read: u64,
-    pub timeout_write: u64,
     pub deadline: Option<time::Instant>,
-    pub method: String,
-    pub proxy: Option<Proxy>,
-    #[cfg(feature = "tls")]
-    pub tls_config: Option<TLSClientConfig>,
-    #[cfg(all(feature = "native-tls", not(feature = "tls")))]
-    pub tls_connector: Option<TLSConnector>,
 }
 
 impl Unit {
@@ -99,26 +82,17 @@ impl Unit {
         };
 
         Unit {
-            agent: Arc::clone(&req.agent),
+            req: req.clone(),
             url: url.clone(),
             is_chunked,
             query_string,
             headers,
-            timeout_connect: req.timeout_connect,
-            timeout_read: req.timeout_read,
-            timeout_write: req.timeout_write,
             deadline,
-            method: req.method.clone(),
-            proxy: req.proxy.clone(),
-            #[cfg(feature = "tls")]
-            tls_config: req.tls_config.clone(),
-            #[cfg(all(feature = "native-tls", not(feature = "tls")))]
-            tls_connector: req.tls_connector.clone(),
         }
     }
 
     pub fn is_head(&self) -> bool {
-        self.method.eq_ignore_ascii_case("head")
+        self.req.method.eq_ignore_ascii_case("head")
     }
 
     #[cfg(test)]
@@ -217,8 +191,8 @@ pub(crate) fn connect(
                     let mut new_unit = Unit::new(req, &new_url, false, &empty);
                     // this is to follow how curl does it. POST, PUT etc change
                     // to GET on a redirect.
-                    new_unit.method = match &unit.method[..] {
+                    new_unit.req.method = match &unit.req.method[..] {
-                        "GET" | "HEAD" => unit.method,
+                        "GET" | "HEAD" => unit.req.method,
                         _ => "GET".into(),
                     };
                     return connect(req, new_unit, use_pooled, redirect_count + 1, empty, true);
@@ -305,11 +279,11 @@ fn connect_socket(unit: &Unit, use_pooled: bool) -> Result<(Stream, bool), Error
         _ => return Err(Error::UnknownScheme(unit.url.scheme().to_string())),
     };
     if use_pooled {
-        let state = &mut unit.agent.lock().unwrap();
+        let state = &mut unit.req.agent.lock().unwrap();
         // The connection may have been closed by the server
         // due to idle timeout while it was sitting in the pool.
         // Loop until we find one that is still good or run out of connections.
-        while let Some(stream) = state.pool.try_get_connection(&unit.url, &unit.proxy) {
+        while let Some(stream) = state.pool.try_get_connection(&unit.url, &unit.req.proxy) {
             let server_closed = stream.server_closed()?;
             if !server_closed {
                 return Ok((stream, true));
@@ -337,7 +311,7 @@ fn send_prelude(unit: &Unit, stream: &mut Stream, redir: bool) -> IoResult<()> {
     write!(
         prelude,
         "{} {}{} HTTP/1.1\r\n",
-        unit.method,
+        unit.req.method,
         unit.url.path(),
         &unit.query_string
     )?;
@@ -404,7 +378,7 @@ fn save_cookies(unit: &Unit, resp: &Response) {
     }
 
     // only lock if we know there is something to process
-    let state = &mut unit.agent.lock().unwrap();
+    let state = &mut unit.req.agent.lock().unwrap();
     for raw_cookie in cookies.iter() {
         let to_parse = if raw_cookie.to_lowercase().contains("domain=") {
             (*raw_cookie).to_string()