Code for How to List all Files and Directories in FTP Server using Python Tutorial

list_files.py

import ftplib
import os
from datetime import datetime

FTP_HOST = "ftp.ed.ac.uk"
FTP_USER = "anonymous"
FTP_PASS = ""
# FTP_HOST = "192.168.1.1"
# FTP_USER = "admin"
# FTP_PASS = "586290929699"

# some utility functions that we gonna need
def get_size_format(n, suffix="B"):
    # converts bytes to scaled format (e.g KB, MB, etc.)
    for unit in ["", "K", "M", "G", "T", "P"]:
        if n < 1024:
            return f"{n:.2f}{unit}{suffix}"
        n /= 1024


def get_datetime_format(date_time):
    # convert to datetime object
    date_time = datetime.strptime(date_time, "%Y%m%d%H%M%S")
    # convert to human readable date time string
    return date_time.strftime("%Y/%m/%d %H:%M:%S")


# initialize FTP session
ftp = ftplib.FTP(FTP_HOST, FTP_USER, FTP_PASS)
# force UTF-8 encoding
ftp.encoding = "utf-8"
# print the welcome message
print(ftp.getwelcome())
# change the current working directory to 'pub' folder and 'maps' subfolder
ftp.cwd("pub/maps")

# LIST a directory
print("*"*50, "LIST", "*"*50)
ftp.dir()

# NLST command
print("*"*50, "NLST", "*"*50)
print("{:20} {}".format("File Name", "File Size"))
for file_name in ftp.nlst():
    file_size = "N/A"
    try:
        ftp.cwd(file_name)
    except Exception as e:
        ftp.voidcmd("TYPE I")
        file_size = get_size_format(ftp.size(file_name))
    print(f"{file_name:20} {file_size}")


print("*"*50, "MLSD", "*"*50)
# using the MLSD command
print("{:30} {:19} {:6} {:5} {:4} {:4} {:4} {}".format("File Name", "Last Modified", "Size",
                                                    "Perm","Type", "GRP", "MODE", "OWNER"))
for file_data in ftp.mlsd():
    # extract returning data
    file_name, meta = file_data
    # i.e directory, file or link, etc
    file_type = meta.get("type")
    if file_type == "file":
        # if it is a file, change type of transfer data to IMAGE/binary
        ftp.voidcmd("TYPE I")
        # get the file size in bytes
        file_size = ftp.size(file_name)
        # convert it to human readable format (i.e in 'KB', 'MB', etc)
        file_size = get_size_format(file_size)
    else:
        # not a file, may be a directory or other types
        file_size = "N/A"
    # date of last modification of the file
    last_modified = get_datetime_format(meta.get("modify"))
    # file permissions
    permission = meta.get("perm")
    
    # get the file unique id
    unique_id = meta.get("unique")
    # user group
    unix_group = meta.get("unix.group")
    # file mode, unix permissions 
    unix_mode = meta.get("unix.mode")
    # owner of the file
    unix_owner = meta.get("unix.owner")
    # print all
    print(f"{file_name:30} {last_modified:19} {file_size:7} {permission:5} {file_type:4} {unix_group:4} {unix_mode:4} {unix_owner}")


# quit and close the connection
ftp.quit()