Vert.x websocket client - 400 Bad Request

Question

How can I connect Cex.IO websocket API from my Java verticles?

The problem is that Vert.x doesn't provide me with a way to connect only with WsURI as Node.JS does. I have to specify port and host and get HTTP 400 Bad Request exception.

With Node.js you do:

var WebSocketClient = require('websocket').client;
var client = new WebSocketClient();
client.connect("wss://ws.cex.io/ws/");

With Vert.x you have to do

int host = 443; // That's defaults
String host = "cex.io"; // Am I right by specifying this host?
HttpClient client = Vertx.vertx().createHttpClient();
client.websocket(port, host, "wss://ws.cex.io/ws/", ws -> { ...});

score 6 · Accepted Answer · answered Jul 18 '17 at 16:03

6

This HttpClient#websocket method takes a relative URI as third parameter.

You should be able to connect like this:

client = vertx.createHttpClient(new HttpClientOptions()
  .setDefaultHost("ws.cex.io")
  .setDefaultPort(443)
  .setSsl(true));

client.websocket("/ws", ws -> {
  // Work with the websocket
});

answered Jul 18 '17 at 16:03

tsegismont

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Wow great answer, thanks! Vert.x documentation is not particularly clean on client side WSS, and the examples also skip this little trick required for WSS. – Gee Bee Aug 06 '19 at 13:32
@GeeBee the doc is on GitHub. How about a PR? – tsegismont Aug 08 '19 at 08:35

Vert.x websocket client - 400 Bad Request

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