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I am trying to know how WhatsApp web-client communicates

I am using WhatsApp app on my Android mobile phone and using Firefox 56 on Windows 7 desktop for web-client

In Firefox I have opened https://web.whatsapp.com/ , scanned the QR in my mobile, completed initial hand-shake and started using WhatsApp web-client

In Firefox I opened Network Monitor tool to view the network communication of the WhatsApp web-client, I sent a message from my mobile app to one of my friends, the message gets reflected in the web-client instantly but I don't see any entry in the Network Monitor tool

How does WhatsApp web-client communicate with the server or the mobile app, how to capture the communication

Thanks in advance !

Dinesh
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    Related newer question: https://stackoverflow.com/questions/66905708/how-to-decrypt-sent-binary-message-by-whatsapp-web – baptx Jun 28 '21 at 13:58

1 Answers1

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Web.whatsapp.com uses web socket to communicate,

first open developer toolbar in chrome then login in web.whatsapp.com then go to network tab in developer toolbar find WS filter and click on it. You'll find web.whatsapp.com is connected on wss://web.whatsapp.com/ws

SPS
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  • I think the OP wanted to capture (decrypt) the message that we see in the network monitor. – baptx Jun 28 '21 at 13:58