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

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

On Sun, Aug 5, 2012 at 11:53 AM, gdfc <gdfc o2 pl> wrote:
> Thanks for your quick reply!
> What do you mean by "(out caller-allocates) (array length=length)"? What would be the correct args for read() be?

There's nothing you can do right now. You're stuck. I'm sorry.

> Dnia 5 sierpnia 2012 17:17 "Jasper St. Pierre" <jstpierre mecheye net> napisał(a):
>
>> 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