Yes your kind of right, what i think i really need to do is extend the 
HTMLLoader class so that i can override the load(urlRequestToLoad:URLRequest) 
method.

I have tried this and get similar results to the user from this post 
(http://tech.groups.yahoo.com/group/apollocoders/message/2900), the new 
extended HTMLLoader is not visible on the stage.

Is it even possible to extend the HTMLLoader class?

--- In flexcoders@yahoogroups.com, Wesley Acheson <wesley.ache...@...> wrote:
>
> Is it not the responseHeaders that you need? on the following object
> http://livedocs.adobe.com/flex/3/langref/flash/events/HTTPStatusEvent.html
> 
> Regards,
> 
> Wesley Acheson
> 
> On Wed, Aug 19, 2009 at 12:54 PM, Barry Evans <bazza...@...> wrote:
> 
> > Hi,
> >
> > This post is quite lengthy, but I really need to explain in detail what it
> > is I'm trying to achieve here.
> >
> > I am developing an AIR application that has an mx.controls.HTML component
> > as the only child; in essence the application is a custom web browser in
> > AIR.
> >
> > I have created a custom HTMLHost component that extends the
> > flash.html.HTMLHost class per the Adobe documentation, so that my
> > application can intercept particular JavaScript calls; i.e.
> > (AS)createWindow() -> (JS)window.open().
> >
> > The main HTML component has its htmlHost property set to an instance of
> > this CustomHTMLHost class, and every new window that is created via the
> > createWindow() method also has its htmlHost set to an instance of the
> > CustomHTMLHost class.
> >
> > In my CustomHTMLHost class, I also override the
> > updateLocation(locationURL:String) method, enabling me to inspect the new
> > URL that is being set on either the main HTML component, or any popup
> > windows that are created.
> >
> > The web application I am loading into the main HTML component allows users
> > to export reports in a number of formats (HTML, PDF, XLS, CSV, TXT) which
> > can either be opened or downloaded when using a conventional browser
> > (IE/FF/Safari).
> >
> > When the user exports a report, a popup window is displayed (which works
> > fine with my application because of the overridden createWindow() method in
> > the CutsomHTMLHost class).
> > After the user clicks the final "Export" button on a PDF/HTML/TXT export,
> > everything works fine and the report results are displayed as the AIR
> > runtime can handle these files.
> >
> > However when the user exports to XLS/CSV nothing happens, which is expected
> > because the AIR runtime does not support those file types.
> > I intend to create a file download manager to handle this so that the user
> > can just save the files to their local file system, and this is where I'm
> > hitting a brick wall.
> >
> > I am able to capture the URL that is being requested to get these latter
> > export types from the overridden updateLocation(locationURL:String) method
> > in the CustomHTMLHost class, but the URL alone is not enough information for
> > the AIR application to send to the web application that provides the report
> > exporting functionality.
> >
> > I need to get access to the rest of the header information (such as POST
> > variables, and also the cookie information) that is sent in the HTTP request
> > when the final "Export" button is clicked by the user to ensure I am getting
> > a valid response from the web application.
> >
> > So, to finally get to my main question...  is there any way to intercept
> > the URLRequests that are created and invoked from a HTML/HTMLHost component?
> >
> > What I really want to be able to do is to inspect the HTTP responses, so
> > that I can determine content of the HTTP response i.e.
> >  Content-Disposition: filename*=Report.xls;
> >  Content-Type: application/vnd.ms-excel; charset=UnicodeLittle
> >
> > With this information I can let my AIR application display a save file
> > dialog or something along those lines.
> >
> > Sorry for the long post, and any help would be appreciated as this is a
> > critical part of my AIR application, and I REALLY need to figure this out.
> >
> > I understand that the approach I am proposing may not even be possible, as
> > I have been doing a number of things to try and solve it.
> > One of which was extending the HTMLLoader class and overriding the
> > load(urlRequestToLoad:URLRequest) method to I could intercept all
> > URLRequests, but I couldn't even get the HTML component that used this class
> > as its htmlLoader property to load any HTML content.
> >
> > Thanks in advance,
> >
> > Barry
> >
> >
> >
> > ------------------------------------
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