Bug 66713 – postMessage to raises INVALID_STATE_ERR instead of DATA_CLONE_ERR in many cases.

• Component: DOM
• Status: RESOLVED FIXED

[David Levin]

Bring our implementation in alignment with the current spec.

[David Levin]

Created attachment 104763 [details]
Patch

[David Levin]

Comment on attachment 104763 [details]
Patch

Need to add the new chromium results.

[David Levin]

Created attachment 105088 [details]
Patch

[Dmitry Titov]

It is a change in behavior. Although likely not a big compat issue, but what do the FF and IE throw in those cases?

[David Levin]

it seems that neither Windows Internet Explorer 10 platform preview 2 edition (WIE10PP2E) nor Firefox nightly implement MessageChannel yet (http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#message-channels).

But I did alternate tests. For Firefox, I did something like this:
  var w = new Worker(location.href);
  w.postMessage(document);

It resulted in a data clone error. (Adding a port argument didn't work because it seems that they don't support this yet.)

For WIE10PP2E, 
   var w = new Worker(location.href);
   w.postMessage("hi", [null]);
resulted in invalid state error and
   var w = new Worker(location.href);
   w.postMessage(document);
resulted in an obscure hresult being returned.

So in short FireFox throws a data clone error. WIE10PP2E returns invalid state at the moment but they were released before the spec changed to this.

Regardless, these errors should only happen when there is a developer programming error, so I'm pretty doubtful that this will be an error condition that folks are trying to handle.

[Dmitry Titov]

Comment on attachment 105088 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=105088&action=review

r=me with a nit.

> LayoutTests/ChangeLog:3
> +        postMessage to raises INVALID_STATE_ERR instead of DATA_CLONE_ERR in many cases.

"to raises" -> "to raise"?

> Source/WebCore/ChangeLog:3
> +        postMessage to raises INVALID_STATE_ERR instead of DATA_CLONE_ERR in many cases.

same as above

[David Levin]

Committed as http://trac.webkit.org/changeset/93986