CODEWITHSUNDEEP
htmlwebsocketjetty-8
DPD
DPD

Reputation: 1804

is it possible to send a data when a websocket connection is opened

I am implementing a Jetty Websocket servlet. When the server receives a new connection, I want to send a message that will be read by websocket's onopen function. I want this message to be sent only during the open and not using the regular connection.SendMessage() function. Is it possible to do that? and how?

Upvotes: 38

Views: 32447

Answers (2)

Lewis
Lewis

Reputation: 14926

Don't forget the query string. It's valid in WebSocket url.

new Websocket('ws://yoursite.com/path?a=1&b=2&c=3')

Then you can easily parse this url on server side to retrieve the data.

Upvotes: 74

simonc
simonc

Reputation: 42195

There is no support for this in the protocol but you could fudge something yourself.

  • When your server completes a handshake, store the initial message you want to deliver to a client.
  • In your client's onopen function, send a "read initial message" request.
  • In your server, check that this client hasn't read its initial message; respond with the message; set a flag saying that the initial message has been sent.
  • Your client and server are both now free to send other messages.

Upvotes: 26

Related Questions