print a url that can show the qrcode image for convenience

examples/ding-dong-bot.ts

@@ -32,7 +32,8 @@ import { FileBox }  from 'file-box'
 import {
   Wechaty,
   log,
-}               from '../src/'
+  qrcodeValueToImageUrl,
+}                         from '../src/'
 
 const BOT_QR_CODE_IMAGE_FILE = path.resolve(
   __dirname,
@@ -78,7 +79,9 @@ bot
   if (data) {
     console.log(data)
   }
-  console.log(`[${status}] Scan QR Code above url to log in: `)
+  console.log(qrcodeValueToImageUrl(qrcode))
+  console.log('^^^ Online QR Code Image URL ^^^ ')
+  console.log(`[${status}] ${qrcode} Scan QR Code above url to log in: `)
 })
 .on('message', async msg => {
   try {

src/config.ts

@@ -218,6 +218,14 @@ export interface Sayable {
 // String.fromCharCode(8197)
 export const FOUR_PER_EM_SPACE = String.fromCharCode(0x2005)
 
+export function qrcodeValueToImageUrl(qrcodeValue: string): string {
+  return [
+    'https://api.qrserver.com/v1/create-qr-code/?data=',
+    encodeURIComponent(qrcodeValue),
+    '&size=220x220&margin=0',
+  ].join('')
+}
+
 export {
   log,
   Raven,

src/index.ts

@@ -5,8 +5,9 @@ export {
 export {
   config,
   log,
+  qrcodeValueToImageUrl,
   VERSION,
-}                     from './config'
+}                         from './config'
 
 /**
  * We need to put `Wechaty` at the beginning of this file for import