Add HTTP/1.0 support and simplify persistent connections handling

samples/chat/chat_server_lib.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("chat_server");
 #import("dart:io");
 #import("dart:isolate");
 #import("dart:json");
 
 typedef void RequestHandler(HttpRequest request, HttpResponse response);
@@ skipping 357 matching lines @@
         String extension = fileName.substring(lastDot);
         if (extension == ".css") { mimeType = "text/css"; }
         if (extension == ".js") { mimeType = "application/javascript"; }
         if (extension == ".ico") { mimeType = "image/vnd.microsoft.icon"; }
         if (extension == ".png") { mimeType = "image/png"; }
       }
       response.setHeader("Content-Type", mimeType);
       // Get the length of the file for setting the Content-Length header.
       RandomAccessFile openedFile = file.openSync();
       response.contentLength = openedFile.lengthSync();
-      openedFile.close();
+      openedFile.closeSync();
       // Pipe the file content into the response.
-      file.openInputStreamSync().pipe(response.outputStream);
+      file.openInputStream().pipe(response.outputStream);
     } else {
       print("File not found: $fileName");
       _notFoundHandler(request, response);
     }
   }
 
   // Serve the not found page.
   void _notFoundHandler(HttpRequest request, HttpResponse response) {
     if (_notFoundPage == null) {
       _notFoundPage = notFoundPageHtml.charCodes();
@@ skipping 318 matching lines @@
     }
   }
 
   int _timeRange;
   List<int> _buckets;
   int _currentBucket;
   int _currentBucketTime;
   num _bucketTimeRange;
   int _sum;
 }