Copying files to remote computer with Python 2.6 (or higher)

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The multiprocessing module was added to Python’s standard library with Python 2.6. This module makes it quite easy to create client/server applications using Python.

Here is an example that shows how to copy a file from a local computer to a remote computer:

import subprocess
import sys
import multiprocessing.managers

host = "127.0.0.1"
port = 8989
password = "Secret"
commands = ["echo %USERPROFILE%", "dir \\", "echo $HOME", "ls /", "non_existing_command"]

def write_file(file_name, file_contents):
    fh = None
    try:
        fh = open(file_name, "wb")
        fh.write(file_contents)
        return True
    except:
        return False
    finally:
	if fh is not None:
	    fh.close()

class RemoteManager(multiprocessing.managers.BaseManager):
    pass

RemoteManager.register("write_file", write_file)

def start_server(port, password):
    print "Listening for incoming connections..."
    mgr = RemoteManager(address=('', port), authkey=password)
    server = mgr.get_server()
    server.serve_forever()

def write_file_remote(host, port, password, file_name_remote, file_contents):
    mgr = RemoteManager(address=(host, port), authkey=password)
    mgr.connect()
    print mgr.write_file(file_name_remote, file_contents)._getvalue()
    print

if __name__ == "__main__":
    if len(sys.argv) > 1 and sys.argv[1] == "--server":
        start_server(port, password)
    elif len(sys.argv) > 3 and sys.argv[1] == "--client":
	fh = None
	try:
	    fh = open(sys.argv[2], "rb")
	    file_contents = fh.read()
	finally:
	    if fh is not None:
		fh.close()
        file_name_remote = sys.argv[3]
        write_file_remote(host, port, password, file_name_remote, file_contents)
    else:
        print "usage: python " + sys.argv[0] + " [ --server | --client <local_file_name> <remote_file_name>]"

Example execution:

C:\U\me\bin> start /b python remotecp.py –server

C:\U\me\bin> Listening for incoming connections…

C:\U\me\bin> python remotecp.py –client C:\Users\me\Desktop\test.txt C:\Users\me\Desktop\test2.txt

True