[xsend.py] A cleaned-up version of http://xmpppy.sourceforge.net/examples/xsend.py. Requires the "xmpppy" package - which is installable via pip.

xsend.py

#!/usr/bin/env python3
# $Id: xsend.py,v 1.8 2006/10/06 12:30:42 normanr Exp $
# Edited & cleaned up by Starbeamrainbowlabs <feedback@starbeamrainbowlabs.com>

import sys
import os
import time

import xmpp

if len(sys.argv) < 2:
    print("Syntax: xsend JID text")
    sys.exit(0)

tojid = sys.argv[1]
text = " ".join(sys.argv[2:])


###############################################################################
class Settings():
    """docstring for Settings."""
    def __init__(self):
        super(Settings, self).__init__()
        self.jid = os.environ.get("XMPP_JID")
        self.password = os.environ.get("XMPP_PASSWORD")
        if not self.jid:
            print("Error: No login JID found in the XMPP_JID environment variable.")
            sys.exit()
        if not self.password:
            print("Error: No password found in the XMPP_PASSWORD environment variable.")
            sys.exit()


settings = Settings()
###############################################################################

jid = xmpp.protocol.JID(settings["jid"])
client = xmpp.Client(jid.getDomain(), debug=[])

con = client.connect()
if not con:
    print("Error: Could not connect!")
    sys.exit()

print("[xsend] Connected with", con)

auth = client.auth(jid.getNode(), settings["password"], resource=jid.getResource())
if not auth:
    print("Error: Failed to authenticate.")
    sys.exit()
print("[xsend] Authenticated using", auth)

# client.SendInitPresence(requestRoster=0)   # you may need to uncomment this for old server
id = client.send(xmpp.protocol.Message(tojid, text))
print("[xsend] Sent message with id", id)

time.sleep(1)   # some older servers will not send the message if you disconnect immediately after sending

# client.disconnect()