parfeval with backgroundpool and ftp and mget

2 次查看（过去 30 天）
William Thielicke
William Thielicke 2024-12-17
评论： Mike Croucher 2024-12-18
Hi, I want to download a file via ftp, and display the progress during download. This works with websave, but I can't get it to work with ftp. Is this not supported, or am I doing something wrong...?
The error message in ME is:
ME =
MException with properties:
identifier: 'MATLAB:string:MissingNotSupported'
message: '<missing> string element not supported.'
cause: {}
stack: [3×1 struct]
Correction: []
function FetchPylon()
FileName = 'pylon.exe';
FilePath=userpath;
ftpobj = ftp('sl290.web.hostpoint.ch','ftp2@pivlab.de');
F = parfeval(backgroundPool,@download_stuff,1,ftpobj,FileName,FilePath);
pause(1)
[ME]=fetchOutputs(F)
fig = uifigure;
fig.Visible='off';
fig.Position = [680 687 444 191];
movegui(fig,'center');
fig.Resize='off';
fig.WindowStyle = 'modal';
fig.Visible='on';
d = uiprogressdlg(fig,'Title','Please Wait','Message','Downloading OPTOcam driver','Cancelable','on');
progress=0;
cancelled=0;
while strcmpi (F.State, 'running')
s = dir(fullfile(FilePath,FileName));
if ~isempty(s)
filesize = s.bytes;
progress= (filesize/1028320736);
d.Value=progress;
d.Message = ['Downloading OPTOcam driver (' num2str(round(filesize/1024/1024)) ' / ' num2str(round(1028320736/1024/1024)) ' MB done).'];
end
if d.CancelRequested
cancel(F)
cancelled=1;
break
end
pause(0.25)
end
close(d)
close(fig)
function [ME]=download_stuff (ftpobj,FileName,FilePath)
try
mget(ftpobj,FileName,FilePath);
catch ME
end
pause(1)
close(ftpobj)
clearvars('ftpobj')
  2 个评论
William Thielicke
William Thielicke 2024-12-17
It seems like mget is not working with a thread based environment as required by backgroundpool. Websave has this kind of support:
https://www.mathworks.com/help/matlab/referencelist.html?type=function&capability=threadsupport
Mike Croucher
Mike Croucher 2024-12-18
I'll add an enhancement request for mget and thread-based environments to our internal database.

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