1 | /**
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2 | * Copyright 2018 Google Inc. All rights reserved.
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 | const WebSocket = require('ws');
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17 |
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18 | /**
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19 | * @implements {!Puppeteer.ConnectionTransport}
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20 | */
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21 | class WebSocketTransport {
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22 | /**
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23 | * @param {string} url
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24 | * @return {!Promise<!WebSocketTransport>}
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25 | */
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26 | static create(url) {
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27 | return new Promise((resolve, reject) => {
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28 | const ws = new WebSocket(url, [], { perMessageDeflate: false });
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29 | ws.addEventListener('open', () => resolve(new WebSocketTransport(ws)));
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30 | ws.addEventListener('error', reject);
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31 | });
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32 | }
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33 |
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34 | /**
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35 | * @param {!WebSocket} ws
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36 | */
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37 | constructor(ws) {
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38 | this._ws = ws;
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39 | this._ws.addEventListener('message', event => {
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40 | if (this.onmessage)
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41 | this.onmessage.call(null, event.data);
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42 | });
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43 | this._ws.addEventListener('close', event => {
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44 | if (this.onclose)
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45 | this.onclose.call(null);
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46 | });
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47 | // Silently ignore all errors - we don't know what to do with them.
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48 | this._ws.addEventListener('error', () => {});
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49 | this.onmessage = null;
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50 | this.onclose = null;
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51 | }
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52 |
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53 | /**
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54 | * @param {string} message
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55 | */
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56 | send(message) {
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57 | this._ws.send(message);
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58 | }
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59 |
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60 | close() {
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61 | this._ws.close();
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62 | }
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63 | }
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64 |
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65 | module.exports = WebSocketTransport;
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