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import select

import socket

import sys

import urllib2

HOST = ''

PORT = 8888

BACKLOG = 5

SIZE = 1024

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

server.bind((HOST, PORT))

server.listen(BACKLOG)

input = [server, sys.stdin]

running = True

cache = {}

def get_webpage(url):

result = urllib2.urlopen(url).read()

cache[url] = result

return result

while running: # simple select reactor

inputready, outputready, exceptready = select.select(input, [], [])

for s in inputready:

if s == server:

client, address = server.accept()

input.append(client)

elif s == sys.stdin:

junk = sys.stdin.readline()

running = False

else:

data = s.recv(SIZE)

if data and data.startswith("http://"):

url = data.strip()

if url in cache:

print "fetched from cache"

data_to_client = cache[url]

else:

print "going to the interweb"

data_to_client = get_webpage(url)

s.send(data_to_client)

else:

s.close()

input.remove(s)

server.close()