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

utils/pub/curl_client.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library curl_client;
 
 import 'dart:io';
 
 import '../../pkg/http/lib/http.dart' as http;
 import 'io.dart';
@@ skipping 27 matching lines @@
       return Process.start(executable, arguments).chain((process_) {
         process = process_;
         if (requestStream.closed) {
           process.stdin.close();
         } else {
           requestStream.pipe(process.stdin);
         }
 
         return _waitForHeaders(process, expectBody: request.method != "HEAD");
       }).chain((_) => new File(headerFile).readAsLines())
-        .transform((lines) => _buildResponse(process, lines));
+        .transform((lines) => _buildResponse(request, process, lines));
     });
   }
 
   /// Returns the list of arguments to `curl` necessary for performing
   /// [request]. [headerFile] is the path to the file where the response headers
   /// should be stored.
   List<String> _argumentsForRequest(
       http.BaseRequest request, String headerFile) {
     // Note: This line of code gets munged by create_sdk.py to be the correct
     // relative path to the certificate file in the SDK.
@@ skipping 104 matching lines @@
     };
     process.stdout.onClosed = () {
       resetCallbacks();
       chainToCompleter(exitFuture, completer);
     };
     return completer.future;
   }
 
   /// Returns a [http.StreamedResponse] from the response data printed by the
   /// `curl` [process]. [lines] are the headers that `curl` wrote to a file.
-  http.StreamedResponse _buildResponse(Process process, List<String> lines) {
+  http.StreamedResponse _buildResponse(
+      http.BaseRequest request, Process process, List<String> lines) {
     // When curl follows redirects, it prints the redirect headers as well as
     // the headers of the final request. Each block is separated by a blank
     // line. We just care about the last block. There is one trailing empty
     // line, though, which we don't want to consider a separator.
     var lastBlank = lines.lastIndexOf("", lines.length - 2);
     if (lastBlank != -1) lines.removeRange(0, lastBlank + 1);
 
     var statusParts = lines.removeAt(0).split(" ");
     var status = int.parse(statusParts[1]);
     var isRedirect = status >= 300 && status < 400;
     var reasonPhrase =
         Strings.join(statusParts.getRange(2, statusParts.length - 2), " ");
     var headers = <String>{};
     for (var line in lines) {
       if (line.isEmpty) continue;
       var split = split1(line, ":");
       headers[split[0].toLowerCase()] = split[1].trim();
     }
     var responseStream = process.stdout;
     if (responseStream.closed) {
       responseStream = new ListInputStream();
       responseStream.markEndOfStream();
     }
     var contentLength = -1;
     if (headers.containsKey('content-length')) {
       contentLength = int.parse(headers['content-length']);
     }
 
     return new http.StreamedResponse(responseStream, status, contentLength,
+        request: request,
         headers: headers,
         isRedirect: isRedirect,
         reasonPhrase: reasonPhrase);
   }
 
   /// The default executable to use for running curl. On Windows, this is the
   /// path to the bundled `curl.exe`; elsewhere, this is just "curl", and we
   /// assume it to be installed and on the user's PATH.
   static String get _defaultExecutable {
     if (Platform.operatingSystem != 'windows') return 'curl';
     // Note: This line of code gets munged by create_sdk.py to be the correct
     // relative path to curl in the SDK.
     var pathToCurl = "../../third_party/curl/curl.exe";
     return relativeToPub(pathToCurl);
   }
 }