Gio.IOStream

const Gio = imports.gi.Gio;

let iOStream = new Gio.IOStream({
});
  

GIOStream represents an object that has both read and write streams. Generally the two streams acts as separate input and output streams, but they share some common resources and state. For instance, for seekable streams they may use the same position in both streams.

Examples of Gio.IOStream objects are Gio.SocketConnection which represents a two-way network connection, and Gio.FileIOStream which represent a file handle opened in read-write mode.

To do the actual reading and writing you need to get the substreams with Gio.IOStream.prototype.get_input_stream and Gio.IOStream.prototype.get_output_stream.

The Gio.IOStream object owns the input and the output streams, not the other way around, so keeping the substreams alive will not keep the Gio.IOStream object alive. If the Gio.IOStream object is freed it will be closed, thus closing the substream, so even if the substreams stay alive they will always just return a Gio.IOErrorEnum.closed for all operations.

To close a stream use Gio.IOStream.prototype.close which will close the common stream object and also the individual substreams. You can also close the substreams themselves. In most cases this only marks the substream as closed, so further I/O on it fails but common state in the Gio.IOStream may still be open. However, some streams may support "half-closed" states where one direction of the stream is actually shut down.