Re: [Gnome Shell Extensions] Reading from a socket with GJS -- failure to read from Gio.InputStream

["Jasper St. Pierre" <jstpierre mecheye net>]

Hm, it seems the method is improperly annotated. It should be (out
caller-allocates) (array length=length).

On Sun, Aug 5, 2012 at 7:55 AM, gdfc <gdfc o2 pl> wrote:
> Hello!
>
> I'm currently writing an extension for Gnome Shell using gjs and have to
> read some gpsd data from a socket. I've gotten this far:
>
>             const Gio = imports.gi.Gio;
>             let sockCl = new Gio.SocketClient();
>             let sockCon = sockCl.connect_to_host("localhost:2947", null,
>             null);
>             let outStr = sockCon.get_output_stream();
>             outStr.write('?WATCH={"enable":true,"json":true};', null);
>             let inStr = sockCon.get_input_stream();
>             let b = new Array(128);
>             inStr.read(b, 1, null);
>
> However, the read method always fails with the following error:
>
>             Error: Argument 'buffer' (type void) may not be null
>
> I've tried all read* methods described in the only more or less current gjs
> API reference I've found [1], but they all seem to have the same problem.
> This is regardless of what type b is -- it can be an array, a string, a
> number or even a function, but it doesn't get recognised as anything other
> than null. I'm aware of [2] (this is the only web search result I've
> stumbled upon), but it is of little help.
>
> So my question here: does anyone know a way to read from a socket in gjs?
> It doesn't have to be Gio, any standard lib would do... I've tried some
> Soup and GLib methods, but they don't seem to work either. In Gio, I do at
> least get the OutputStream to write reliably...
>
> Any advice is highly appreciated. Thank you!
>
> BR
>
> gdfc
>
> [1] http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gio.InputStream.html
> [2] https://mail.gnome.org/archives/javascript-list/2012-January/msg00003.html
> _______________________________________________
> gnome-shell-list mailing list
> gnome-shell-list gnome org
> https://mail.gnome.org/mailman/listinfo/gnome-shell-list



-- 
  Jasper