Web server crashes when spammed with F5 - dart

Question

I made a simple web server but it crashes every time I am refreshing page many times in a short time. I just enter 127.0.0.1:8080 in my browser and then spam with F5. Here is the code to reproduce this issue:
void main()
{
HttpServer server = new HttpServer();
server.addRequestHandler((req) => true, handleGET);
server.listen('127.0.0.1', 8080);
}
void handleGET(HttpRequest req, HttpResponse res)
{
var requestedFile = ".${req.path}";
if(req.path == "/")
{
requestedFile = requestedFile.concat("index.html");
}
File file = new File(requestedFile);
file.exists().then((bool found) {
if(found)
{
file.openInputStream().pipe(res.outputStream);
}
else
{
res.statusCode = HttpStatus.NOT_FOUND;
res.outputStream.close();
}
});
}
The error I get is following:
Unhandled exception:
StreamException: Stream closed
#0 _SocketOutputStream._write (dart:io:6017:30)
#1 _HttpResponse._writeHeader (dart:io:5981:18)
#2 _HttpRequestResponseBase._ensureHeadersSent (dart:io:2696:19)
#3 _HttpResponse._streamClose (dart:io:2921:23)
#4 _HttpOutputStream.close (dart:io:3078:36)
#5 _pipe.<anonymous closure> (dart:io:6271:28)
#6 _BaseDataInputStream._checkScheduleCallbacks.issueCloseCallback (dart:io:6231:59)
#7 _Timer._createTimerHandler._handleTimeout (dart:io:6804:28)
#8 _Timer._createTimerHandler._handleTimeout (dart:io:6812:7)
#9 _Timer._createTimerHandler.<anonymous closure> (dart:io:6820:23)
#10 _ReceivePortImpl._handleMessage (dart:isolate-patch:37:92)
Often before this mayor exception I receive a bunch of warnings like WSASend failed: 10053 but those don't crash the server. I work on Windows if this problem is related to some specific implementation.

Answer 1

Because you are hitting reload very quickly, your code ends up trying to write to a socket that has already been closed. Hence, you should probably catch StreamException and just ignore it. It could be argued that the io library should help you out a bit more. I just filed this bug:
http://code.google.com/p/dart/issues/detail?id=7334&thanks=7334&ts=1355280746