Correct settings headers for HTTP2

Add test to verify number of Set-Cookies

src/server/h2writer.rs

@@ -112,7 +112,7 @@ impl<H: 'static> Writer for H2Writer<H> {
                 DATE => has_date = true,
                 _ => (),
             }
-            resp.headers_mut().insert(key, value.clone());
+            resp.headers_mut().append(key, value.clone());
         }
 
         // set date header
@@ -151,6 +151,8 @@ impl<H: 'static> Writer for H2Writer<H> {
                 .insert(CONTENT_ENCODING, HeaderValue::try_from(ce).unwrap());
         }
 
+        trace!("Response: {:?}", resp);
+
         match self
             .respond
             .send_response(resp, self.flags.contains(Flags::EOF))
@@ -159,8 +161,6 @@ impl<H: 'static> Writer for H2Writer<H> {
             Err(_) => return Err(io::Error::new(io::ErrorKind::Other, "err")),
         }
 
-        trace!("Response: {:?}", msg);
-
         let body = msg.replace_body(Body::Empty);
         if let Body::Binary(bytes) = body {
             if bytes.is_empty() {

tests/test_server.rs

@@ -931,3 +931,47 @@ fn test_application() {
     let response = srv.execute(request.send()).unwrap();
     assert!(response.status().is_success());
 }
+
+#[test]
+fn test_server_cookies() {
+    use actix_web::http;
+
+    let mut srv = test::TestServer::with_factory(|| {
+        App::new().resource("/", |r| r.f(|_| HttpResponse::Ok().cookie(http::CookieBuilder::new("first", "first_value").http_only(true).finish())
+                                                               .cookie(http::Cookie::new("second", "first_value"))
+                                                               .cookie(http::Cookie::new("second", "second_value"))
+                                                               .finish())
+        )
+    });
+
+    let first_cookie = http::CookieBuilder::new("first", "first_value").http_only(true).finish();
+    let second_cookie = http::Cookie::new("second", "second_value");
+
+    let request = srv.get().finish().unwrap();
+    let response = srv.execute(request.send()).unwrap();
+    assert!(response.status().is_success());
+
+    let cookies = response.cookies().expect("To have cookies");
+    assert_eq!(cookies.len(), 2);
+    if cookies[0] == first_cookie {
+        assert_eq!(cookies[1], second_cookie);
+    } else {
+        assert_eq!(cookies[0], second_cookie);
+        assert_eq!(cookies[1], first_cookie);
+    }
+
+    let first_cookie = first_cookie.to_string();
+    let second_cookie = second_cookie.to_string();
+    //Check that we have exactly two instances of raw cookie headers
+    let cookies = response.headers().get_all(http::header::SET_COOKIE)
+                                    .iter()
+                                    .map(|header| header.to_str().expect("To str").to_string())
+                                    .collect::<Vec<_>>();
+    assert_eq!(cookies.len(), 2);
+    if cookies[0] == first_cookie {
+        assert_eq!(cookies[1], second_cookie);
+    } else {
+        assert_eq!(cookies[0], second_cookie);
+        assert_eq!(cookies[1], first_cookie);
+    }
+}