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refactor: use browser-compliant interface of 'ws' (#3218)

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Bundled version of Puppeteer should rely on native WebSocket.

Luckily, 'ws' module supports the same interface as the native
browser websockets. This patch switches WebSocketTransport to
use the browser-compliant interface of 'ws'.

After this patch, I was able to bundle Puppeteer for browser
using the following config in `package.json`:

```json
"browser": {
  "./lib/BrowserFetcher.js": false,
  "ws": "./lib/BrowserWebSocket",
  "fs": false,
  "child_process": false,
  "rimraf": false,
  "readline": false
}
```

where `./lib/BrowserWebSocket` is:

```js
module.exports = WebSocket;
```

and the bundling command is:

```sh
$ browserify -r ./index.js:puppeteer > ppweb.js
```

References #2119
This commit is contained in:
Andrey Lushnikov 2018-09-11 18:41:28 +01:00 committed by GitHub
parent 56b3bd809e
commit 9c4b6d06e2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 7 deletions
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14
lib/WebSocketTransport.js
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@ -25,9 +25,9 @@ class WebSocketTransport {
*/
static create(url) {
return new Promise((resolve, reject) => {
const ws = new WebSocket(url, { perMessageDeflate: false });
ws.on('open', () => resolve(new WebSocketTransport(ws)));
ws.on('error', reject);
const ws = new WebSocket(url, [], { perMessageDeflate: false });
ws.addEventListener('open', () => resolve(new WebSocketTransport(ws)));
ws.addEventListener('error', reject);
});
}
@ -36,16 +36,16 @@ class WebSocketTransport {
*/
constructor(ws) {
this._ws = ws;
this._ws.on('message', event => {
this._ws.addEventListener('message', event => {
if (this.onmessage)
this.onmessage.call(null, event);
this.onmessage.call(null, event.data);
});
this._ws.on('close', event => {
this._ws.addEventListener('close', event => {
if (this.onclose)
this.onclose.call(null);
});
// Silently ignore all errors - we don't know what to do with them.
this._ws.on('error', () => {});
this._ws.addEventListener('error', () => {});
this.onmessage = null;
this.onclose = null;
}