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/**
* Copyright 2018 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { ConnectionTransport } from '../common/ConnectionTransport.js';
import NodeWebSocket from 'ws';
export class NodeWebSocketTransport implements ConnectionTransport {
static create(url: string): Promise<NodeWebSocketTransport> {
return new Promise((resolve, reject) => {
const ws = new NodeWebSocket(url, [], {
perMessageDeflate: false,
maxPayload: 256 * 1024 * 1024, // 256Mb
});
ws.addEventListener('open', () =>
resolve(new NodeWebSocketTransport(ws))
);
ws.addEventListener('error', reject);
});
}
private _ws: NodeWebSocket;
onmessage?: (message: string) => void;
onclose?: () => void;
constructor(ws: NodeWebSocket) {
this._ws = ws;
this._ws.addEventListener('message', (event) => {
if (this.onmessage) this.onmessage.call(null, event.data);
});
this._ws.addEventListener('close', () => {
if (this.onclose) this.onclose.call(null);
});
// Silently ignore all errors - we don't know what to do with them.
this._ws.addEventListener('error', () => {});
this.onmessage = null;
this.onclose = null;
}
send(message: string): void {
this._ws.send(message);
}
close(): void {
this._ws.close();
}
}
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