On some of my machines I got the error "Error creating offer: SyntaxError: Failed to construct 'RTCPeerConnection': '' is not a valid URL."

[qiulang]

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Browser affected

  System:
    OS: macOS 14.1.2
    CPU: (8) arm64 Apple M2
    Memory: 82.39 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Browsers:
    Chrome: 120.0.6099.109
    Safari: 17.1.2

Description

On some of my machines, when trying https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/

I get "Error creating offer: SyntaxError: Failed to construct 'RTCPeerConnection': '' is not a valid URL."

The console log shows ,

Creating new PeerConnection with config={"iceServers":[{"urls":["stun:stun.l.google.com:19302"]},{"urls":[""],"username":"","credential":""},{"urls":[""],"username":"","credential":""},{"urls":[""],"username":"","credential":""}],"iceTransportPolicy":"all"}

Steps to reproduce

I have restart the machines and Chrome, but I still get the error. But other browsers do not have it.

[alvestrand]

"" is not a legal URL, so the error message is quite correct.

I can reproduce the error by pressing "Add Server" a few times before hitting "Gather candidates" without filling in anything in the URI field of the form. Is this what's happening?

It might be good if the UI did not allow adding an empty URI.

[qiulang]

But I didn't know how I triggered the problem and it just happened and only happened in some of my machine.

[alvestrand]

Try it again and be careful to NOT touch the "Add Server" button, and see if you can reproduce.

[qiulang]

On one of my machine it always happens now but it used to work so I had thought it may be because of some Chrome extensions I installed. I closed all these extension but it still happens. On my other machine I still can not trigger it.

[fippo]

The "Reset to defaults" button should clear the invisible elements. But we should not be adding them in the first place...

[qiulang]

@fippo yes "Reset to defaults" does fix my problem. I just can't find out why it happened in the first place.

[qiulang]

Hi I am closing this issue as I don't want to "waste" my time on this minor issue.

[alvestrand]

See if PR #1648 fixes your issue.