Not seeing all traffic incoming from a website in the inspector under the network tab?

user_2769934 0
Viewed 188

So when I go to a website like, say https://coinmarketcap.com (that displays the prices of cryptocurrencies), in my Chrome Browser, it looks like I dont see all activity going on in the inspector under the Network tab.

Here is a screenshot to visualize the website: enter image description here

I see the prices are updated live on the website (without refreshing), but I don't see any activity in the Network inspector.

There is of course activity when I load the page for the first time, but nothing after that even tho the website dynamically updates the prices? My firsts thought was, that it could be fake updates via a JS script on the client-side, but there are many websites I know where you can't see this, so what's going on here? What types of protocols are used to achieve this, because I know that WebSockets and polling (xhr) always shows up.

A screenshot of the network inspector, just be clear what I mean by that (showing traffic for the first 50 ms (loading time) and then nothing afterwards) enter image description here

web-inspector google-chrome networking
3 Answers

It using Web socket, you filter the request by WS and should see the latest ws connection. Click on it and sees the message for this socket. enter image description here

user_11015700

it was necessary to use a proxy like burpsuite in order to capture the sockets sent and received by the client / server here is the result it's about 72 request received in a single second

Burpsuite Websocket history

user_110039180

The website you suggested is using Websockets for communication.

To see WebSockets request in WS tab in Network inspector, You will have to open the console first then refresh the page.

The console needs to capture the initial handshakes when communication initializes. So if you open the website first then check the console, you may not find anything in WS.

user_17595190
Related