Cloud Insights Browser Audits PoC

[Blinkuu]

What?

This is a little PoC showcasing the possibility of enabling CDP's Audits domain and listening to associated issues for every page.

To see it work:

make build
./xk6-browser run -v examples/pagegoto.js 2>&1 | grep -E "Audits|onIssueAdded" > logs.log
cat logs.log

Warning: This PoC is not intended to be merged, at least in its current form and status.

Why?

N/A

Checklist

• I have performed a self-review of my code
• I have added tests for my changes
• I have commented on my code, particularly in hard-to-understand areas

Related PR(s)/Issue(s)

[Blinkuu]

I had to update the chromedp package as it didn't have the newest CDP protocol's type definitions and Audits.issueAdded events failed to unmarshal in session.go:

xk6-browser/common/session.go

Lines 85 to 101 in cd451af

	ev, err := cdproto.UnmarshalMessage(msg)
	if errors.Is(err, cdp.ErrUnknownCommandOrEvent("")) && msg.Method == "" {
	// Results from commands may not always have methods in them.
	// This is the reason of this error. So it's harmless.
	//
	// Also:
	// This is most likely an event received from an older
	// Chrome which a newer cdproto doesn't have, as it is
	// deprecated. Ignore that error, and emit raw cdproto.Message.
	s.emit("", msg)
	continue
	}
	if err != nil {
	s.logger.Debugf("Session:readLoop:<-s.readCh", "sid:%v tid:%v cannot unmarshal: %v", s.id, s.targetID, err)
	continue
	}
	s.emit(string(msg.Method), ev)

I simply updated to the newest version:

go get -u github.com/chromedp/chromedp

[Blinkuu]

The new cdproto version removed the already deprecated PostData field on network.Request. Actually supporting the new protocol format could take some time. Not sure what this is used for and how hard it'd be upgrade at this point 🤔

[inancgumus]

Yeah, updating cdproto is fine for this PoC. However, updating cdproto has some issues (as seen here) in general. We can do the update in a separate PR before this one so that we can ensure that the browser module is still stable after the update.