Tidy up Response::url initialization

src/response.rs

@@ -498,13 +498,15 @@ impl Response {
         let compression =
             get_header(&headers, "content-encoding").and_then(Compression::from_header_value);
 
+        // remove Content-Encoding and length due to automatic decompression
         if compression.is_some() {
-            headers.retain(|h| h.name() != "content-encoding" && h.name() != "content-length");
-            // remove Content-Encoding and length due to automatic decompression
+            headers.retain(|h| !h.is_name("content-encoding") && !h.is_name("content-length"));
         }
 
+        let url = unit.as_ref().map(|u| u.url.clone());
+
         Ok(Response {
-            url: None,
+            url,
             status_line,
             index,
             status,
@@ -517,13 +519,6 @@ impl Response {
         })
     }
 
-    pub(crate) fn do_from_request(unit: Unit, stream: Stream) -> Result<Response, Error> {
-        let url = Some(unit.url.clone());
-        let mut resp = Response::do_from_stream(stream, Some(unit))?;
-        resp.url = url;
-        Ok(resp)
-    }
-
     #[cfg(test)]
     pub fn as_write_vec(&self) -> &[u8] {
         self.stream.as_write_vec()

src/unit.rs

@@ -281,7 +281,10 @@ fn connect_inner(
     body::send_body(body, unit.is_chunked, &mut stream)?;
 
     // start reading the response to process cookies and redirects.
-    let result = Response::do_from_request(unit.clone(), stream);
+    // TODO: this unit.clone() bothers me. At this stage, we're not
+    // going to use the unit (much) anymore, and it should be possible
+    // to have ownership of it and pass it into the Response.
+    let result = Response::do_from_stream(stream, Some(unit.clone()));
 
     // https://tools.ietf.org/html/rfc7230#section-6.3.1
     // When an inbound connection is closed prematurely, a client MAY