secbot.py

#!/usr/bin/python3

import os
import time
from slackclient import SlackClient
import json
import shlex, subprocess
import sys
sys.path.insert(0, '/home/ubuntu/vault')
from bots import *
import logging

import builtins as __builtin__
def print(*args, **kwargs):
    __builtin__.print(*args, flush=True, **kwargs)

BOT_NAME = 'secbot'
BOT_ID = "UD5EX9DUY"

slack_client = SlackClient(SLACKTOKEN)

# constants
AT_BOT = "<@" + BOT_ID + ">"

logger = logging.getLogger('secbot')

def handle_command(command, channel):
    """
        Receives commands directed at the bot and determines if they
        are valid commands. If so, then acts on the commands. If not,
        returns back what it needs for clarification.
    """

    existing_commands = next(os.walk('plugins'))[1] #list of commands available
    print(existing_commands)
    for c in existing_commands:
        if command.startswith(c):
            response = ""
            args = command.split()
            args.pop(0) #remove first element (command itself) to pass only args
            args_joined = " ".join(args)
            print(args_joined)
            cdir = "plugins/{0}".format(c)
            file_to_run = [name for name in os.listdir(cdir) if os.path.isfile(os.path.join(cdir, name))] #file inside "c" dir. Presence of just one file is ensured during staging tests
            print(file_to_run)
            cmd = "./plugins/{0}/{1} {2}".format(c,file_to_run[0], args_joined)
            #cmd = "python3 ./plugins/{0}/{1} {2}".format(c,file_to_run[0], args_joined)
            print(cmd)
            p = subprocess.Popen(shlex.split(cmd), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
            out = p.communicate()[0]
            p.wait()
            #print(out)
            out_list = out.decode('utf-8').split("\n")
            #print(out_list)
            #response = "*Running cmd: {}* \n".format(c)

            # if a plugin returns a list of strings in format ["CODE", "str1", "str2"]
            # "CODE" will be stripped and str1 and str2 will be formatted as Slack code
            # ```str1
            #    str2```

            if out_list[0] == "CODE":
                out_list.pop(0)
                response = "```"
                for record in out_list:
                    if ( len(record) + len(response) + 2*len('```')) > 4000:
                        if len(record) > 4000:
                            logger.debug('Long response')
                            logger.debug('len(record) = {}'.format(len(record)))
                            logger.debug(out_list)
                            response = "*One line of output is longer then 4k chars. Change implementation of your command.*"
                            break
                        else:
                            response += "```"
                            logger.debug('Message cut. Length: {}, potential length: {}'.format( len(response), len(response+record) ))
                            slack_client.api_call("chat.postMessage", channel=channel, text=response, as_user=True)
                            response = "```"
                    response += record
                    response += "\n"
                if response[0] != '*': # there is no error message
                    response += "```"
                break
            else:
                for record in out_list:
                    response += record
                    response += "\n"
                break
        else:
            response = "Sorry, command not found. Please try: \n ```@secbot help```"

    slack_client.api_call("chat.postMessage", channel=channel, text=response, as_user=True)

#####

def parse_slack_output(slack_rtm_output):
    """
        The Slack Real Time Messaging API is an events firehose.
        this parsing function returns None unless a message is
        directed at the Bot, based on its ID.
    """
    output_list = slack_rtm_output
    if output_list and len(output_list) > 0:
        for output in output_list:
            if output and 'text' in output and AT_BOT in output['text']:
                # return text after the @ mention, whitespace removed
                return output['text'].split(AT_BOT)[1].strip().lower(), \
                       output['channel']
    return None, None


if __name__ == "__main__":
    logging.basicConfig(filename='/var/log/secbot.log',level=logging.DEBUG)
    READ_WEBSOCKET_DELAY = 1 # 1 second delay between reading from firehose
    if slack_client.rtm_connect():
        print("StarterBot connected and running!")
        while True:
            command, channel = parse_slack_output(slack_client.rtm_read())
            if command and channel:
                handle_command(command, channel)
            time.sleep(READ_WEBSOCKET_DELAY)
    else:
        print("Connection failed. Invalid Slack token or bot ID?")