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public class FetchFile : Object
{
/* public variables */
public string uri {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);
public FetchFile (string uri)
{
Object (uri: uri);
}
construct
{
this.file = File.new_for_uri(this.uri);
this.data = new ByteArray ();
}
public async void fetch_data ()
{
//grab our data from our uri
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, size, 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);
}
}
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