#!/usr/bin/env python

import socket
import sys

c = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_TCP)
c.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
c.bind(('127.0.0.1', 110))
c.listen(1)


while 1:
    csock, caddr = c.accept()
    cfile = csock.makefile('rw', 0)
    cfile.write("+OK SImple pop server ready for requests\r\n")
    line = cfile.readline().strip()
    print "USER: " + line
    cfile.write("+OK send PASS\r\n")
    line = cfile.readline().strip()
    print "PASSWORD: " + line
    cfile.write("+OK Welcome.\r\n")
    cfile.close()
    c.close()
    sys.exit()

# python pop3.py
USER: CAPA
PASSWORD: QUIT

pop3_capabilities='+OK Capability list follows\r\nUSER\r\nRESP-CODES\r\nEXPIRE 0\r\nLOGIN-DELAY 300\r\nTOP\r\nUIDL\r\nX-GOOGLE-RICO\r\nSASL PLAIN XOAUTH2 OAUTHBEARER\r\n.\r\n'

while 1:
    curr_user = ''
    curr_password = ''
    csock, caddr = c.accept()
    cfile = csock.makefile('rw', 0)
    cfile.write("+OK Simple pop server ready for requests\r\n")

    line = cfile.readline().strip()
    cfile.write(pop3_capabilities)

    line = cfile.readline().strip()
    curr_user = line.split('@')[0].split(' ')[1]

    cfile.write("+OK send PASS\r\n")
    line = cfile.readline().strip()
    curr_password = line.split(' ')[1]

    cfile.write("+OK Welcome.\r\n")
    print "User: " + curr_user + ", password: " + curr_password
    cfile.close()
    c.close()
    sys.exit()

# python pop3.py
POP server ready for requests
User: test, password: 123456789