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spidertrap.py
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#!/usr/bin/env python3
# Spider Trap
### Configuration Section ###
# the lower and upper limits of how many links to put on each page
LINKS_PER_PAGE = (5, 10)
# the lower and upper limits of how long each link can be
LENGTH_OF_LINKS = (3, 20)
# the port to bind the webserver on
PORT = 8000
# the delay between the receiving a request and serving up a webpage (in milliseconds)
DELAY = 350
# characters to compose random links from
CHAR_SPACE = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_-/'
### End Configuration Section ###
import sys
import random
#import BaseHTTPServer
from http.server import BaseHTTPRequestHandler, HTTPServer
import time
class Handler(BaseHTTPRequestHandler):
webpages = None
def generate_page(self, seed):
"""Generate a webpage containing only random links"""
html = '<html>\n<body>\n'
random.seed(seed)
# number of links to put on a page
num_pages = random.randint(*LINKS_PER_PAGE)
# check if a file was provided
if self.webpages is None:
# generate some random links
for i in range(num_pages):
address = ''.join([random.choice(CHAR_SPACE) for i in range(random.randint(*LENGTH_OF_LINKS))])
html += '<a href="' + address + '">' + address + '</a><br>\n'
else:
# get links from the file contents
for i in range(num_pages):
address = random.choice(self.webpages)
html += '<a href="' + address + '">' + address + '</a><br>\n'
html += '</body>\n</html>'
return html
def do_HEAD(self):
"""Sends header information"""
self.send_response(200)
self.send_header("Content-type", "text/html")
self.end_headers()
def do_GET(self):
"""Responds to any webpage request with a page generated by the generate_page function"""
# sleep() takes number of seconds, but accepts floating values
# DELAY should be in milliseconds
time.sleep(DELAY/1000.0)
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
# seed the rand function with the current URL path
self.wfile.write(self.generate_page(self.path).encode())
def print_usage():
print('Usage: ' + sys.argv[0] + ' [FILE]\n')
print('FILE is file containing a list of webpage names to serve, one per line. If no file is provided, random links will be generated.')
def main():
if '-h' in sys.argv or '--help' in sys.argv:
print_usage()
exit()
# Use a file, if provided on command line
if len(sys.argv) == 2:
try:
# read in the file
f = open(sys.argv[1])
Handler.webpages = f.readlines()
f.close()
# check for empty file
if Handler.webpages == []:
print('The file provided was empty. Using randomly generated links.')
Handler.webpages = None
except IOError:
print('Can\'t read input file. Using randomly generated links.')
try:
print('Starting server on port %d...' % PORT)
server = HTTPServer(('', PORT), Handler)
print('Server started. Use <Ctrl-C> to stop.')
server.serve_forever()
except KeyboardInterrupt:
print('Stopping server...')
server.socket.close()
print('Server stopped')
except:
print('Error starting http server on port %d.' % PORT)
print('Make sure you are root, if needed, and that port %d is open.' % PORT)
if __name__ == '__main__':
main()