private void SingleCopy(IFile srcfile, IDirectory dstdirpar)
{
IElement dstelem = dstdirpar.GetChild(srcfile.Name); // TODO: try catch
if(dstelem != null) {
throw new Exception(dstelem.FullName + " already exists.");
}
_wnd.Invoke( (FVoid) delegate { _wnd.Line1 = "Copying " + srcfile.FullName + " ..."; } );
bool retry;
do {
retry = false;
try {
using(Stream srcstm = srcfile.Open(true, false)) {
using(Stream dststm = dstdirpar.CreateFileAndOpen(srcfile.Name, srcfile.Size, srcfile.ContentType, false, true) /* dstfile.Open(false, true) */) {
long pos = 0;
long len = srcstm.Length;
byte[] buf = new byte[4096]; // Setting a lower value seems to help against timeouts at Amazon S3 (before: 65536)
while(len > 0) {
int now = (len > buf.Length) ? buf.Length : (int) len;
now = srcstm.Read (buf, 0, now);
dststm.Write(buf, 0, now);
dststm.Flush();
len -= now;
pos += now;
_wnd.Invoke( (FVoid) delegate { _wnd.Line2 = ((pos + 1023) >> 10) + " KB copied."; } );
if(_cancel) break;
}
}
}
} catch(Exception ex) {
switch(MessageBox.Show("Failed to copy '" + srcfile.FullName + "' to '" + dstdirpar.FullName + "'.\n" + ex.Message + "\n\nDo you want to retry?\nSelect 'Cancel' to abort.", "Error", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Error)) {
case DialogResult.Yes: retry = true; break;
case DialogResult.No: retry = false; break;
case DialogResult.Cancel: _cancel = true; break;
}
try {
dstelem = dstdirpar.GetChild(srcfile.Name);
if(dstelem != null) dstelem.Delete();
} catch { }
}
} while(retry && !_cancel);
_wnd.Invoke( (FVoid) delegate { _wnd.Line2 = null; } );
}
