This seems very interesting... could you open a bug for this?
thanks!
darin
Mark Hammond wrote:
> Hi all,
> I have a bizarre problem you may be able to help with. It is a bit
> of a killer for the Komodo project at the moment. It is very simple to
> repro.
>
> Below, I have a XUL file with a button. When you click on this button,
> some JS code uses the io-service and newChannelFromURI() to open a
> "file://" URL and dump the contents.
>
> The file IO works perfectly. However, after this, the code attempts to
> load a standard Mozilla browser window. This new browser appears to
> have no network connectivity at all - ie, sidebar (tinderbox etc) and
> the page you request to load never complete. The barbershop and Moz
> icons continually cycle, but nothing ever loads.
>
> If you comment out the 20 or so lines of javascript, the new Mozilla
> window loads fine - the page and all items on the sidebar open normally.
>
> Once Mozilla in in this state, 2 warnings appear:
>
> WARNING: not calling OnDataAvailable, file
> F:\src\AS\mozilla\netwerk\base\src\nsAsyncStreamListener.cpp, line 410
>
> I have tried tracking this in the debugger. For some reason, the
> channel is canceled in response to a onStartRequest() event, but I
> havent worked out exactly who is cancelling it, or why. (ie, the
> GetStatus() call above this line succeeds, but the returned status is
> "canceled".)
>
> Hopefully the problem is simply that I am neglecting to close something.
> However, only the streams appear to have close methods, and I am
> calling these.
>
> I am running from the tip (few days old now tho), Windows 2000, debug
> and release builds. I can open files using a different technique (such
> as the js IO library), but need the ability to open other schemes - such
> as "chrome://" URLs to open resources. The problem is not js related,
> as it can be reproduced without any javascript (with the Python bindings)
>
> To reproduce the problem, place the XUL below in a chrome directory, and
> load it via a "-chrome "chrome://..." command-line. A small window with
> a button will appear. Clicking this button will dump the contents of
> the named file, then create a browser window. The window will open, but
> the contents will not load.
>
> Any clues for me?
>
> Thanks,
>
> Mark.
>
> <?xml version="1.0"?>
>
> <?xml-stylesheet href="chrome://communicator/skin" type="text/css"?>
> <window
> id="test-io"
> title="Channels kill async IO"
> xmlns:html="http://www.w3.org/TR/REC-html40"
> xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
>
> <script language="javascript">
>
> function OpenMozilla() {
>
> // **** Set this to a small, valid file
> var url = "file://c:/temp/delme.txt";
>
> // convert to nsIURL interface.
> var url_ob = Components.classes["@mozilla.org/network/standard-url;1"]
> .createInstance()
> .QueryInterface(Components.interfaces.nsIURL);
> url_ob.spec = url;
>
> // Now open the URL.
> var io_service =
> Components.classes["@mozilla.org/network/io-service;1"]
> .createInstance()
> .QueryInterface(Components.interfaces.nsIIOService);
> var channel = io_service.newChannelFromURI(url_ob);
> var inputStream = channel.openInputStream();
> // make the input stream scriptable.
> var sinputStream =
> Components.classes["@mozilla.org/scriptableinputstream;1"]
> .createInstance()
>
> ..QueryInterface(Components.interfaces.nsIScriptableInputStream);
> sinputStream.init(inputStream);
>
> dump("Read '" + sinputStream.read(-1) + "'\n");
>
> // close everything I know how!
> inputStream.close();
> sinputStream.close();
>
> openDialog('chrome://navigator/content/', '_blank', 'chrome,all',
> 'http://www.mozilla.org/');
> return 1;
> }
>
> </script>
>
> <button id="launch moz" value="launch moz" oncommand="return
> OpenMozilla();"/>
> </window>
