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/*
* Copyright (C) 2010 Canonical, Ltd.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* version 3.0 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Authors
* Gordon Allott <gord.allott@canonical.com>
* Conor Curran <conor.curran@canonical.com>
*/
public class FetchFile : Object
{
/* public variables */
public string uri {get; construct;}
public string intended_property {get; construct;}
/* private variables */
private DataInputStream stream;
private File? file;
private ByteArray data;
/* public signals */
public signal void failed ();
public signal void completed (ByteArray data, string property);
public FetchFile (string uri, string prop)
{
Object (uri: uri, intended_property: prop);
}
construct
{
this.file = File.new_for_uri(this.uri);
this.data = new ByteArray ();
}
public async void fetch_data ()
{
try {
this.stream = new DataInputStream(this.file.read(null));
this.stream.set_byte_order (DataStreamByteOrder.LITTLE_ENDIAN);
} catch (GLib.Error e) {
this.failed ();
}
this.read_something_async ();
}
private async void read_something_async ()
{
ssize_t size = 1024;
uint8[] buffer = new uint8[size];
ssize_t bufsize = 1;
do {
try {
bufsize = yield this.stream.read_async (buffer, GLib.Priority.DEFAULT, null);
if (bufsize < 1) { break;}
if (bufsize != size)
{
uint8[] cpybuf = new uint8[bufsize];
Memory.copy (cpybuf, buffer, bufsize);
this.data.append (cpybuf);
}
else
{
this.data.append (buffer);
}
} catch (Error e) {
this.failed ();
}
} while (bufsize > 0);
this.completed (this.data, this.intended_property);
}
}
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