added listing files & directories in ftp server tutorial

x4nth055 · x4nth055 · commit 67001a21cdc0 · 2020-03-25T22:27:38.000+01:00
diff --git a/README.md b/README.md
@@ -86,5 +86,6 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Handle Files in Python using OS Module](https://www.thepythoncode.com/article/file-handling-in-python-using-os-module). ([code](python-standard-library/handling-files))
     - [How to Generate Random Data in Python](https://www.thepythoncode.com/article/generate-random-data-in-python). ([code](python-standard-library/generating-random-data))
     - [How to Use Threads to Speed Up your IO Tasks in Python](https://www.thepythoncode.com/article/using-threads-in-python). ([code](python-standard-library/using-threads))
+    - [How to List all Files and Directories in FTP Server using Python](https://www.thepythoncode.com/article/list-files-and-directories-in-ftp-server-in-python). ([code](python-standard-library/listing-files-in-ftp-server))
 
 For any feedback, please consider pulling requests.
diff --git a/python-standard-library/listing-files-in-ftp-server/README.md b/python-standard-library/listing-files-in-ftp-server/README.md
@@ -0,0 +1 @@
+# [How to List all Files and Directories in FTP Server using Python](https://www.thepythoncode.com/article/list-files-and-directories-in-ftp-server-in-python)
diff --git a/python-standard-library/listing-files-in-ftp-server/list_files.py b/python-standard-library/listing-files-in-ftp-server/list_files.py
@@ -0,0 +1,91 @@
+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()

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+# [How to List all Files and Directories in FTP Server using Python](https://www.thepythoncode.com/article/list-files-and-directories-in-ftp-server-in-python)`