@asyncapi/nodejs-ws-template
Version:
Node.js WebSockets template for AsyncAPI generator.
63 lines (54 loc) • 2 kB
HTML
<html lang="en">
<head>
<title>{{ asyncapi.info().title() }}</title>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<meta content="utf-8" http-equiv="encoding">
</head>
<body>
<h1>Open your browser console to see the logs and details of API you can use to talk to the server.</h1>
<script>
let connection;
function displayHelp() {
console.log('Available channels:')
{%- for channelName, channel in asyncapi.channels() %}
{%- if channel.hasSubscribe() %}
console.log('* {{ channelName }}');
{%- endif -%}
{% endfor %}
console.log('Available commands:')
console.log('- listen: Establish a connection with the server at a given path.')
console.log(' Usage: listen(channelName)');
console.log(` Example: listen('{{ asyncapi.channelNames()[0] }}')`);
console.log('- send: Send a message to the server at a currently connected path.')
console.log(' Usage: send(message)');
console.log(` Example: send({ greet: 'Hello from client' })`);
}
function listen(path) {
const url = new URL(path, 'ws://{{ asyncapi.server(params.server).url() }}').toString()
connection = new WebSocket(url)
connection.onerror = error => {
console.log(`WebSocket error: ${error}`)
}
connection.onopen = () => {
console.log('Connected to server');
}
connection.onmessage = e => {
console.log('Server says:', e.data)
}
}
function send(message) {
if (!connection) {
console.error('You have to call listen(channelName) first. See the list of available commands and below.');
displayHelp();
return;
}
let msg = message;
if (typeof msg === 'object') msg = JSON.stringify(msg);
connection.send(msg);
console.info('Hint: check out the server logs to see your message.');
}
displayHelp();
</script>
</body>
</html>