Keep around a copy of the http.Request that triggered each Response.

pkg/http/lib/src/base_response.dart

Index: pkg/http/lib/src/base_response.dart
diff --git a/pkg/http/lib/src/base_response.dart b/pkg/http/lib/src/base_response.dart
index 57f4a95b9d578c7e825d59d0cd77210214f14f44..8b7da0cbb743c676d4924e59eee213aac5f29f66 100644
--- a/pkg/http/lib/src/base_response.dart
+++ b/pkg/http/lib/src/base_response.dart
@@ -6,11 +6,16 @@ library base_response;
 
 import 'dart:io';
 
+import 'base_request.dart';
+
 /// The base class for HTTP responses.
 ///
 /// Subclasses of [BaseResponse] are usually not constructed manually; instead,
 /// they're returned by [BaseClient.send] or other HTTP client methods.
 abstract class BaseResponse {
+  /// The (frozen) request that triggered this response.
+  final BaseRequest request;

[Bob Nystrom, 2012/11/29 23:57:04]

Pedantic, but you should have a test that you can access this property and that
it returns the same object you passed to the constructor.

[nweiz, 2012/11/30 00:08:54]

Done.

+
   /// The status code of the response.
   final int statusCode;
 
@@ -37,7 +42,8 @@ abstract class BaseResponse {
   BaseResponse(
       this.statusCode,
       this.contentLength,
-      {this.headers: const <String>{},
+      {this.request,
+       this.headers: const <String>{},
        this.isRedirect: false,
        this.persistentConnection: true,
        this.reasonPhrase});