[Qt-interest] How to load page from Qt resource with AJAX?

Fri Nov 12 06:58:14 CET 2010

Hi,
One cannot access arbitrary sites and resources using xmlhttp; only the
resources from the same origin. I am pretty sure that is why your first case
did not work. See "same origin policy" (
http://en.wikipedia.org/wiki/Same_origin_policy). There is a patch to
disable this but it's not in mainline yet -
https://bugs.webkit.org/show_bug.cgi?id=45436.

Girish
On Fri, Nov 12, 2010 at 8:31 AM, sherzod_ <sherzod.l at mail.ru> wrote:

> Hi, Girish
>
> Excellent!)) Thank you, you pointed me the right way. Let me try to explain
> why.
>
> By webView.loadFromResource(":/root/index.html"); I meant something like
> this:
>
> //------------------------- c++ -------------------------------------
> QResource page(":/elinksetup/index.html");
> QString content = QString(QByteArray((const char*)page.data(),
>                        page.size()));
> QWebView webView.setHtml(content);
> // this works, index.html is loaded, and I can see it :)
> //-------------------------------------------------------------------
>
> I can't remember why I did so. But after I changed it to
>
> //------------------------- c++ -------------------------------------
> QWebView webView;
> webView.load(QUrl("qrc:/root/index.html"));
> //-------------------------------------------------------------------
>
> all stuff seems to work). So thank you again.
>
> But I still wonder why in the first case AJAX doesn't work? Maybe something
> wrong with baseUrl? The absolute path always used though... And the
> LocalContentCanAccessRemoteUrls option is on. Well OK, maybe I should learn
> about setHtml's specificity more.
>
> > Hi Sherzod,
> > What does webView.loadFromResource(":/root/index.html"); do? QWebView has
> > no such method.
> >
> > qrc:/root/index.html and qrc:/root/sayHello.html is the correct way to
> > address the resources.
> >
> > What you are doing below should work. All network requests go through
> QNAM
> > and the file backend supports qrc: scheme. I can give you a few debugging
> > hints:
> > 0. Does webView.load("qrc:/root/index.html") load index.html? If not you
> > might need a Q_INIT_RESOURCE in your main app. Since the resource is in a
> > dll and the dll maybe dynamically initialized, the resources are probably
> > not registered wit Qt yet. Does it work if you move the resource files to
> > the main application?
> > 1. If index.html loads, then you should be able to issue a request
> > as .load("sayHello.html");. This will at least eliminate the cross-origin
> > request scenario.
> >
> > Girish
> >
> > On Thu, Nov 11, 2010 at 2:20 PM, sherzod_ <sherzod.l at mail.ru> wrote:
> >
> >> Hello.
> >>
> >> Let us have a resource "qrc:/root/sayHello.html" with a simple content
> >> <p>Hello, world!</p>.
> >>
> >> I need to load the content of the resource to some <div> element by
> means
> >> of
> >> ajax, wich runs in a context of some other page in a QWebView.
> >>
> >> ---------------------------------------------------------------
> >>
> >> <!-- qrc:/root/sayHello.html -->
> >> <p>Hello, world!!!</p>
> >>
> >> ---------------------------------------------------------------
> >>
> >> <!-- qrc:/root/index.html -->
> >> <!DOCTYPE somekindofhtml>
> >> <html>
> >>
> >> <script type="text/javascript">
> >>        /* use JQuery */
> >>        $(document).ready(function (){
> >>                $("#board")
> >>                /* this doesn't work */
> >>                .load("qrc:/root/sayHello.html");
> >>        });
> >> </script>
> >>
> >> <body>
> >>        <div id="board"></div>
> >> </body>
> >> </html>
> >>
> >> ---------------------------------------------------------------
> >> // c++ code
> >> QWebView webView;
> >> webView.loadFromResource(":/root/index.html"); // Let it be
> >>
> >>
> >> extra:
> >>        tried all combinations of qrc, :, /, //, ///
> >>        resource is in dll wich i d-ly load at runtime via plugin api
> >>
> >> How to do it correct?
> >> i'll be glad to any suggestions.
> >>
> >> _______________________________________________
> >> Qt-interest mailing list
> >> Qt-interest at trolltech.com
> >> http://lists.trolltech.com/mailman/listinfo/qt-interest
> >>
>
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