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[FIX] Get QR code directly from canvas element (fix #26)

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This commit is contained in:
Pedro Lopez 2019-12-04 02:58:55 -04:00
commit bea1ebf480
3 changed files with 12 additions and 7 deletions
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13
src/Client.js
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@ -3,12 +3,12 @@
const EventEmitter = require('events');
const puppeteer = require('puppeteer');
const moduleRaid = require('moduleraid/moduleraid');
const jsQR = require('jsqr');
const Util = require('./util/Util');
const { WhatsWebURL, UserAgent, DefaultOptions, Events, WAState } = require('./util/Constants');
const { ExposeStore, LoadUtils } = require('./util/Injected');
const ChatFactory = require('./factories/ChatFactory');
const Chat = require('./structures/Chat');
const Message = require('./structures/Message');
/**
@ -65,12 +65,11 @@ class Client extends EventEmitter {
} else {
// Wait for QR Code
const QR_CONTAINER_SELECTOR = '._2d3Jz';
const QR_VALUE_SELECTOR = '._1pw2F';
await page.waitForSelector(QR_CONTAINER_SELECTOR);
const qr = await page.$eval(QR_VALUE_SELECTOR, node => node.getAttribute('data-ref'));
const QR_CANVAS_SELECTOR = 'canvas';
await page.waitForSelector(QR_CANVAS_SELECTOR);
const qrImgData = await page.$eval(QR_CANVAS_SELECTOR, canvas => [].slice.call(canvas.getContext('2d').getImageData(0,0,264,264).data));
const qr = jsQR(qrImgData, 264, 264).data;
this.emit(Events.QR_RECEIVED, qr);
// Wait for code scan