Bug 109288 – [Qt] After the web process crashes and is restarted, WebView.experimental.onMessageReceived is not invoked anymore

• Component: WebKit Qt
• Status: RESOLVED INVALID

[Olivier Tilloy]

Created attachment 187295 [details]
minimal standalone example to reproduce the bug

This issue is observed with the QML WebView component from QtWebkit 5.0.0 in Ubuntu 12.10.

libqt5webkit5-qmlwebkitplugin version 5.0.0-0ubuntu1~quantal1~test5~withdebug~gstabs~patches installed from https://launchpad.net/~canonical-qt5-edgers/+archive/qt5-proper. According to the source package, the corresponding version of webkit is revision 136242 from trunk.

I’m injecting some javascript into the document using experimental.evaluateJavaScript(…), the code injected calls navigator.qt.postMessage(…) to send messages back to the QML side, and on the QML side I’m getting the messages in the experimental.onMessageReceived(…) slot.
This works nicely, until the web process crashes. If I refresh the page, the web process is restarted, and the code is injected, but I’m not getting the messages on the QML side anymore: experimental.onMessageReceived(…) is never invoked again.

I’ve written a minimal standalone example which I’m attaching here.

Steps to reproduce the issue:

 1) open the QML script from a terminal with qmlscene
 2) observe that when the page is loaded, the message "MESSAGE: hello QML" is printed out to the console
 3) click on the refresh button, and observe that the page is reloaded, and the same message is printed out again to the console
 4) in another terminal window, issue `killall QtWebProcess`
 5) click on the refresh button, observe that the page is reloaded, but the message is not printed out to the console

Please let me know if I can provide more useful/detailed information to help fix the issue.

[Lamarque V. Souza]

Created attachment 204083 [details]
Patch

Proposed patch

[Anders Carlsson]

Comment on attachment 204083 [details]
Patch

Qt has been removed, clearing review flags.

[Jocelyn Turcotte]

=== Bulk closing of Qt bugs ===

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