Bug 139342 – Pending API Request URL is wrong after reloading

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKit2

[Carlos Garcia Campos]

It happens when reloading a web view loaded with anything but a URL, because the bf list is not updated for those cases and WebPageProxy::reload() is setting the current bf list item URL as Pending API Request URL. This also causes that progress is reported wrongly, because WebPageProxy::decidePolicyForNavigationAction() resets the Pending API Request URL when it's different than the requested URL. The page load transaction causes the progress to be changed, reporting 1.0 (the previous one), but later something < 1.0 is reported again by the progress tracker.

[Carlos Garcia Campos]

Created attachment 242716 [details]
Patch

I've reused the new test I added for bug #136916 to test this.

[Michael Catanzaro]

Owners?

[Darin Adler]

Comment on attachment 242716 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=242716&action=review

I’m saying review+ but I am not 100% sure this is right.

> Source/WebKit2/UIProcess/WebPageProxy.cpp:902
> +    String url = m_pageLoadState.activeURL();
> +    if (url.isEmpty() && m_backForwardList->currentItem())
> +        url = m_backForwardList->currentItem()->url();
> +
> +    if (!url.isEmpty()) {

Seems a little peculiar here to use isEmpty rather than isNull.

I’m generally concerned that this code is trying to figure out what URL the other process will reload; we are not sending the URL over, so this is trying to predict what the other process will do? If so, then it seems that to be correct this has to match the logic in FrameLoader::reload and other loader logic inside WebCore, and it seems to me that adding this one thing it’s still far from matching it! It’s nice to fix this one particular case, but what about:

- The case where there is an unreachableURL.
- If a window is created by javascript, its main frame can have an empty but non-nil URL. We need to test that case.

I’d like to hear Anders’s opinion.

[Carlos Garcia Campos]

(In reply to comment #3)
> Comment on attachment 242716 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=242716&action=review
> 
> I’m saying review+ but I am not 100% sure this is right.
> 
> > Source/WebKit2/UIProcess/WebPageProxy.cpp:902
> > +    String url = m_pageLoadState.activeURL();
> > +    if (url.isEmpty() && m_backForwardList->currentItem())
> > +        url = m_backForwardList->currentItem()->url();
> > +
> > +    if (!url.isEmpty()) {
> 
> Seems a little peculiar here to use isEmpty rather than isNull.
> 
> I’m generally concerned that this code is trying to figure out what URL the
> other process will reload; we are not sending the URL over, so this is
> trying to predict what the other process will do? If so, then it seems that
> to be correct this has to match the logic in FrameLoader::reload and other
> loader logic inside WebCore, and it seems to me that adding this one thing
> it’s still far from matching it!

Note that this only affects the pending API request URL. This is to ensure that getting the active URL right after load or reload returns a valid URL, in case of load methods the one passed to the load. In case of reload that URL should always be the current active URL of the web view, since that's what we want to reload. If the web process ends up loading a different URL it doesn't really matter, because as soon as provisional load starts, the provisional url is used  instead of the pending api request one.

> It’s nice to fix this one particular case,
> but what about:
> 
> - The case where there is an unreachableURL.

This case is covered by this patch, because PageLoadState::activeURL() returns the unreachable URL if there's one.

> - If a window is created by javascript, its main frame can have an empty but
> non-nil URL. We need to test that case.

Yes, I would need to check what happens in this particular case.

> I’d like to hear Anders’s opinion.

[Carlos Garcia Campos]

Created attachment 276622 [details]
Patch for landing

[WebKit Commit Bot]

Attachment 276622 [details] did not pass style-queue:


ERROR: Tools/TestWebKitAPI/Tests/WebKit2/PendingAPIRequestURL.cpp:44:  More than one command on the same line  [whitespace/newline] [4]
Total errors found: 1 in 4 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Carlos Garcia Campos]

Created attachment 276629 [details]
Rebased patch

[WebKit Commit Bot]

Attachment 276629 [details] did not pass style-queue:


ERROR: Tools/TestWebKitAPI/Tests/WebKit2/PendingAPIRequestURL.cpp:47:  More than one command on the same line  [whitespace/newline] [4]
Total errors found: 1 in 4 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Carlos Garcia Campos]

Committed r199664: <http://trac.webkit.org/changeset/199664>