Add new HttpMultipartFormData, used for parsing a MimeMultipart and extracting either text or binar…

tests/standalone/io/http_auth_digest_test.dart

 // Copyright (c) 2013, 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.
 
 import "package:expect/expect.dart";
 import 'dart:async';
 import 'dart:crypto';
 import 'dart:io';
 import 'dart:isolate';
 import 'dart:uri';
@@ skipping 49 matching lines @@
         }
 
         var response = request.response;
         if (request.headers[HttpHeaders.AUTHORIZATION] != null) {
           Expect.equals(1, request.headers[HttpHeaders.AUTHORIZATION].length);
           String authorization =
             request.headers[HttpHeaders.AUTHORIZATION][0];
           HeaderValue header =
               HeaderValue.parse(
                   authorization, parameterSeparator: ",");
-          if (header.value == "basic") {
+          if (header.value.toLowerCase() == "basic") {
             sendUnauthorizedResponse(response);
           } else if (!useNextNonce && nonceCount == nonceStaleAfter) {
             nonce = "87654321";
             nonceCount = 0;
             sendUnauthorizedResponse(response, stale: true);
           } else {
             var uri = header.parameters["uri"];
             var qop = header.parameters["qop"];
             var cnonce = header.parameters["cnonce"];
             var nc = header.parameters["nc"];
-            Expect.equals("digest", header.value);
+            Expect.equals("digest", header.value.toLowerCase());
             Expect.equals("dart", header.parameters["username"]);
             Expect.equals(realm, header.parameters["realm"]);
             Expect.equals("MD5", header.parameters["algorithm"]);
             Expect.equals(nonce, header.parameters["nonce"]);
             Expect.equals(request.uri.path, uri);
             if (qop != null) {
               // A server qop of auth-int is downgraded to none by the client.
               Expect.equals("auth", serverQop);
               Expect.equals("auth", header.parameters["qop"]);
               Expect.isNotNull(cnonce);
@@ skipping 292 matching lines @@
   testAuthenticateCallback(null, null);
   testAuthenticateCallback("MD5", null);
   testAuthenticateCallback("MD5", "auth");
   testAuthenticateCallback("MD5", "auth-int");
   testStaleNonce();
   testNextNonce();
   // These teste are not normally run. They can be used for locally
   // testing with another web server (e.g. Apache).
   //testLocalServerDigest();
 }