[webkit-help] Javascript problem when running on WebKit+Cairo+Win32

Rick Xu rick.zhi.xu at gmail.com
Thu Jun 10 13:54:20 PDT 2010

Hi Brent,

The database creation problem has been solved. I believe the reason
why I can't create a new database from javascript in webpage is the
security quota. It must be greater than 0. But initially, it's set as
0. So, no new database will be allowed to create.

The solution is quite similar to the approach described in the following link:


What I did is adding a line of code


before the check

        if (requirement <= quotaForOriginNoLock(origin))
            return true;

in the DatabaseTracker.cpp. Then, we can create the database successfully.

But I am still a little bit confused about the "quota". I think 3000
is quite a big number . What does it mean? the number of databases
allowed to create? or the size of space allowed for database ?

Best wishes,


2010/5/25 Brent Fulgham <bfulgham at gmail.com>:
> Hi Rick,
> On Tue, May 25, 2010 at 12:13 PM, Rick Xu <rick.zhi.xu at gmail.com> wrote:
>> But when I try to open a webpage with javascript using the generated
>> browser. I found several problems:
> The WinLauncher utility isn't a true web browser; it's just a small
> launcher application that wraps WebKit and allows simple testing that
> rendering and other functions work properly.  Much of the
> functionality you are hoping for is provided by the browser, and is
> not implemented in WinLauncher.
>> 1. When I right click on a URL address on the webpage and select "Open
>> Link in New Window", nothing happened. It should open a new window and
>> display the URL.
> No logic was included to launch new frames.  This might be controlled
> by a preference, but I haven't looked into this as I did not need
> separate windows for my program.
>> 2. It seems: "  alert("....")  " in javascript is not supported. A
>> simple line as " alert("say hi"); "  will not pop up any alert window;
> WebKit is executing the alert; it's just that the default
> implementation is a no-op. You need to provide a delegate to do
> something with the alert message.  This is provided by the
> "runJavaScriptAlertPanelWithMessage" delegate method, defined by the
> IWebFrameLoadDelegate interface.  Take a look in the "include/WebKit"
> folder after a build is complete to see the declarations for this
> method.
>> 3. The SQLite database support. The line " db =
>> openDatabase("NoteTest", "1.0", "HTML5 Database API example", 200000);
>> " will get no response;
> I have not tried this functionality out.  I know some of the other
> HTML5 test cases used to work, but I haven't looked at them recently.
> Thanks,
> -Brent

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