Support WebSocket connections in standalone VM HTTP library

[sgjesse]

The HTTP library in the standalone VM should support the WebSocket protocol.

It might look something like this:

interface HttpWebSocketConnection {
  void onMessage(...)
  void sendMessage(...)
  ...
}

interface HttpServer {
  ...

  // For handling WebSocket connections.
  onWebSocketConnect(HttpWebSocketConnection connection)
}

With this approach the HttpServer will handle the connection upgrade automatically.

Alternatively it should be possible to control whether to upgrade or not, e.g.:

interface HttpWebSocketOutound {
  void sendMessage(...)
  ...
}

interface WebSocketConnections {
  void onConnect(HttpWebSocketOutound outbound)
  void onMessage(...)
  void onDisconnect(...)
}

interface HttpServer {
  ...

  // For handling WebSocket requests.
  WebSocketConnections onWebSocketConnect(HttpRequest request);
}

If onWebSocketConnect returns null no upgrade/handshake is performed. If an instance of WebSocketConnections is returned this object receives callbacks when something happens in the WebSocket connection. The outbound argument passed to onConnect is used for sending messages.

[DartBot]

This comment was originally written by [email protected]

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Really wish this was available on the server side so I could keep from having to resort to using Node.js for it. I'm guessing this isn't going to be on the radar for a while though.

[sgjesse]

This is on the radar and something we will start looking at within a few weeks. Some initial plumbing was added in http://code.google.com/p/dart/source/detail?r=6464.

[DartBot]

This comment was originally written by [email protected]

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Awesome!

[sgjesse]

Added Started label.

[sgjesse]

Initial implementation of the server end of the web socket in the following changes:

http://code.google.com/p/dart/source/detail?r=6998
http://code.google.com/p/dart/source/detail?r=7008

[sgjesse]

Web socket client implemented in

http://code.google.com/p/dart/source/detail?r=7224

and with bug-fixes in follow-up changes.

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Added Fixed label.

[kevmoo]

Removed Area-IO label.
Added Area-Library, Library-IO labels.