add bits to deal with Upgrade requests

src/client/response.rs

@@ -65,6 +65,11 @@ impl Response {
             body: body,
         })
     }
+
+    /// Unwraps the Request to return the NetworkStream underneath.
+    pub fn unwrap(self) -> Box<NetworkStream + Send> {
+        self.body.unwrap().unwrap()
+    }
 }
 
 impl Reader for Response {
@@ -73,3 +78,33 @@ impl Reader for Response {
         self.body.read(buf)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::boxed::BoxAny;
+    use std::io::BufferedReader;
+
+    use header::Headers;
+    use http::EofReader;
+    use mock::MockStream;
+    use net::NetworkStream;
+    use status;
+    use version;
+
+    use super::Response;
+
+
+    #[test]
+    fn test_unwrap() {
+        let res = Response {
+            status: status::Ok,
+            headers: Headers::new(),
+            version: version::Http11,
+            body: EofReader(BufferedReader::new(box MockStream as Box<NetworkStream + Send>))
+        };
+
+        let b = res.unwrap().downcast::<MockStream>().unwrap();
+        assert_eq!(b, box MockStream);
+
+    }
+}