Downloading Files from FTP server which is updated in last n hours

Question

My requirement is to download the files which are arrived in the root directory in the last 24 hours.

The code below is working in a subdirectory (let's say ftp.cwd("/Landing/") but trigger the error while I am changing to the root directory.

filematch='*.csv'
ftp.cwd("/")
for file_data in ftp.mlsd(filematch):
    file_name,meta = file_data
    last_modified = datetime.strptime(meta.get("modify"), "%Y%m%d%H%M%S")
    
    if (last_modified) >= now- timedelta(hours=0, minutes=1440):                   
        print(last_modified)
        local_filename = os.path.join('C:\\Work\\', file_name)
        file = open(local_filename, 'wb')
        with open(local_filename, "wb") as file:
            ftp.retrbinary(f"RETR {file_name}", file.write)

If I'am changing the >= to == then its working in root directory ( but both condition are fine in subdirectory; issue is only in root)

if (last_modified) = now- timedelta(hours=0, minutes=1440):

Error Message:-

File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1776.0_x64__qbz5n2kfra8p0\lib\ftplib.py", line 425, in retrbinary with self.transfercmd(cmd, rest) as conn: File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1776.0_x64__qbz5n2kfra8p0\lib\ftplib.py", line 382, in transfercmd return self.ntransfercmd(cmd, rest)[0] File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1776.0_x64__qbz5n2kfra8p0\lib\ftplib.py", line 348, in ntransfercmd resp = self.sendcmd(cmd) File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1776.0_x64__qbz5n2kfra8p0\lib\ftplib.py", line 275, in sendcmd return self.getresp() File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1776.0_x64__qbz5n2kfra8p0\lib\ftplib.py", line 248, in getresp raise error_perm(resp)ftplib.error_perm: 550 Permission denied.

"Permission denied" means you are not allowed to read that directory. — tripleee, Oct 06 '20 at 18:09
Hi, I am able to download the files when I put if (last_modified) == now- timedelta(hours=0, minutes=1440): but when I put ">=" instead of == then only getting the permission issue. — SaQuiB, Oct 06 '20 at 18:13

score 0 · Answer 1 · answered Oct 07 '20 at 08:31

This issue has been fixed.

root cause:-

1>

filematch='*.csv'
ftp.cwd("/")
for file_data in ftp.mlsd(filematch):

above code will fetch list of everything in spite putting file type as csv.

Note ** LIST() does not work in FTP

once list and directory will be available then it will try to write the files using retrbinanary and it will support only files not dir

ftp.retrbinary(f"RETR {file_name}", file.write)

so just put one more condition in if statement and pick only the file.

Condition meta([type])=="file"

Downloading Files from FTP server which is updated in last n hours

1 Answers1