Make IOSink implement StringSink

sdk/lib/io/http_headers.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.
 
 part of dart.io;
 
 class _HttpHeaders implements HttpHeaders {
   _HttpHeaders(String this.protocolVersion)
       : _headers = new Map<String, List<String>>();
 
@@ skipping 332 matching lines @@
   _write(IOSink sink) {
     final COLONSP = const [_CharCode.COLON, _CharCode.SP];
     final COMMASP = const [_CharCode.COMMA, _CharCode.SP];
     final CRLF = const [_CharCode.CR, _CharCode.LF];
 
     var bufferSize = 16 * 1024;
     var buffer = new Uint8List(bufferSize);
     var bufferPos = 0;
 
     void writeBuffer() {
-      sink.add(buffer.getRange(0, bufferPos));
+      sink.writeBytes(buffer.getRange(0, bufferPos));
       bufferPos = 0;
     }
 
     // Format headers.
     _headers.forEach((String name, List<String> values) {
       bool fold = _foldHeader(name);
       List<int> nameData;
       nameData = name.codeUnits;
       int nameDataLen = nameData.length;
       if (nameDataLen + 2 > bufferSize - bufferPos) writeBuffer();
@@ skipping 250 matching lines @@
     _value = parseValue();
     skipWS();
     if (done()) return;
     maybeExpect(parameterSeparator);
     parseParameters();
   }
 }
 
 
 class _ContentType extends _HeaderValue implements ContentType {
+  String _primaryType = "";
+  String _subType = "";
+
   _ContentType(String primaryType,
                String subType,
                String charset,
                Map<String, String> parameters)
       : _primaryType = primaryType, _subType = subType, super("") {
     if (_primaryType == null) _primaryType = "";
     if (_subType == null) _subType = "";
     _value = "$_primaryType/$_subType";;
     if (parameters != null) {
       parameters.forEach((String key, String value) {
         this.parameters[key.toLowerCase()] = value.toLowerCase();
       });
     }
     if (charset != null) {
       this.parameters["charset"] = charset.toLowerCase();
     }
   }
 
-    _ContentType.fromString(String value) : super.fromString(value) {
+  _ContentType.fromString(String value) : super.fromString(value) {
     int index = _value.indexOf("/");
     if (index == -1 || index == (_value.length - 1)) {
       _primaryType = _value.trim().toLowerCase();
       _subType = "";
     } else {
       _primaryType = _value.substring(0, index).trim().toLowerCase();
       _subType = _value.substring(index + 1).trim().toLowerCase();
     }
   }
 
   String get primaryType => _primaryType;
 
   String get subType => _subType;
 
   String get charset => parameters["charset"];
-
-  String _primaryType = "";
-  String _subType = "";
 }
 
 
 class _Cookie implements Cookie {
   _Cookie([String this.name, String this.value]);
 
   _Cookie.fromSetCookieValue(String value) {
     // Parse the 'set-cookie' header value.
     _parseSetCookieValue(value);
   }
@@ skipping 112 matching lines @@
 
   String name;
   String value;
   DateTime expires;
   int maxAge;
   String domain;
   String path;
   bool httpOnly = false;
   bool secure = false;
 }