Fix HTTP sample implementation to actually wait for connections before attempting to write.

tests/standalone/src/SocketExceptionTest.dart

 // Copyright (c) 2011, 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.
 //
 // Tests socket exceptions.
 
 class SocketExceptionTest {
 
   static final PORT = 0;
   static final HOST = "127.0.0.1";
 
   static void serverSocketExceptionTest() {
     bool exceptionCaught = false;
     bool wrongExceptionCaught = false;
 
     ServerSocket server = new ServerSocket(HOST, PORT, 10);
     Expect.equals(true, server !== null);
     server.close();
     try {
       server.close();
     } catch (SocketIOException ex) {
       exceptionCaught = true;
     } catch (Exception ex) {
       wrongExceptionCaught = true;
     }
     Expect.equals(false, exceptionCaught);
     Expect.equals(true, !wrongExceptionCaught);
-    exceptionCaught = false;
-    try {
-      server.accept();

[Søren Gjesse, 2011/12/01 11:15:43]

Maybe put this back replacing accept with listen.

[Mads Ager (google), 2011/12/01 11:43:59]

Listen is implicit. There is get port but that needs better error handling that
just returns zero at this point.

-    } catch (SocketIOException ex) {
-      exceptionCaught = true;
-    } catch (Exception ex) {
-      wrongExceptionCaught = true;
-    }
-    Expect.equals(true, exceptionCaught);
-    Expect.equals(true, !wrongExceptionCaught);
   }
 
   static void clientSocketExceptionTest() {
     bool exceptionCaught = false;
     bool wrongExceptionCaught = false;
 
     ServerSocket server = new ServerSocket(HOST, PORT, 10);
     Expect.equals(true, server !== null);
     int port = server.port;
     Socket client = new Socket(HOST, port);
@@ skipping 131 matching lines @@
   static void testMain() {
     serverSocketExceptionTest();
     clientSocketExceptionTest();
     indexOutOfRangeExceptionTest();
   }
 }
 
 main() {
   SocketExceptionTest.testMain();
 }