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client.py
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client.py
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#!/usr/bin/env python
import socket
import thread
import os
import platform
import datetime
import time
from mimetypes import MimeTypes
import urllib
# Define this client's IP address/ hostname and Port number
SERVER_IP = ''
CLIENT_IP = ''
SERVER_PORT = 7735
CLIENT_PORT = 4443
BUFFER_SIZE = 1024
rfc_title_list = []
rfc_no_list = []
# Set OS String
if os.name == "posix":
if platform.system() == "Darwin":
v, _, _ = platform.mac_ver()
OS = "macOS "+v
print OS
else:
OS = platform.system()+" "+platform.release()
print OS
else:
OS = platform.system()+" "+platform.release()
print OS
# Data structure - Each node in a linked list
class Node(object):
def __init__ (self, dta, next = None):
self.data = dta
self.next_node = next
def get_next (self):
return self.next_node
def set_next(self, next):
self.next_node = next
def get_data (self):
return self.data
def set_data (self, dta):
self.data = dta
# Linked List with add, find and remove methods
class LinkedList (object):
def __init__(self, rroot = None):
self.root = rroot
self.size = 0
def get_size (self):
return self.size
def add (self, dta):
new_node = Node (dta, self.root)
self.root = new_node
self.size +=1
def remove (self, dta):
this_node = self.root
prev_node = None
while this_node:
if this_node.get_data() == dta:
if prev_node:
prev_node.set_next(this_node.get_next())
else:
self.root = this_node
self.size -= 1
return True
else:
prev_node = this_node
this_node = this_node.get_next()
return False
def find (self, ref, dta):
self.root = ref
this_node = self.root
while this_node:
match = this_node.get_data()
rfc_n=match[1]
hostname = match[0]
if rfc_n == dta:
# return this_node.get_data()
return hostname #to return pointer to this node
else:
this_node = this_node.get_next()
return None
def findPeer (self, ref, dta):
self.root = ref
this_node = self.root
while this_node:
match = this_node.get_data()
hostname = match[0]
if hostname == dta:
# return this_node.get_data()
return match #to return pointer to this node
else:
this_node = this_node.get_next()
return None
def get_root(self):
return self.root
# CLIENT LOGIC - P2P and P2P
#need a loop to search valid RFCs
def searchrfc (array, dta):
i = 0
for amount in array:
if array[i]== dta:
print array[i]
return "TRUE"#to say valid number
else:
i+=1
return None
# Spawn new thread processes to handle new p2p connections
def p2p_thread(conn1,addr):
print 'New thread with connection address:', addr
hel = conn1.recv(BUFFER_SIZE)
# print hel
conn1.send("Hello from Client!")
#Recieve request from peer with RFC Number
peer_info = conn1.recv(BUFFER_SIZE)
# Value Passed as "GET RFC "+str(rfc_no)+" P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"OS: Mac OS 10.4.1"
print "RECEIVED DATA FROM PEER:" + peer_info
#Hard Code
#peer_info = "GET RFC 1234 P2P-CI/1.0\nHost: 127.0.0.1\nOS: Mac OS 10.4.1"
#Split input by spaces to get rfcnum which is spot 2
peer_info = peer_info.split(' ')
#Send the appropriate text file back
rfcnum = int(peer_info[2])
# print rfcnum
# print "RFC NO LIST",rfc_no_list
match = searchrfc(rfc_no_list, rfcnum)
if match == "TRUE":
index = rfc_no_list.index(int(rfcnum))
f_name = str(rfcnum)+"-"+str(rfc_title_list[index])+".txt"
access = open( f_name, "r")
#newfile = open(str(newfile)+".txt", "w")
file = access.read()
#newfile.write(file)
access.close()
#newfile.close()
today = datetime.date.today()
a = today.strftime("%a, %d %b %Y, %H:%M:%S %Z")
b = time.ctime(os.path.getmtime(f_name))
c = os.path.getsize(f_name)
mime = MimeTypes()
url = urllib.pathname2url(f_name)
mime_type = mime.guess_type(url)
d = mime_type[0]
temp1 = "P2P-CI/1.0 200 OK\nDate: "+str(a)+"\n"+"OS: "+str(OS)+"\n"+"Last-Modified: "+str(b)+"\nContent-Length: "+str(c)+"\nContent-Type: "+str(d)+"\n"
conn1.sendall(temp1)
conn1.recv(BUFFER_SIZE)
conn1.sendall(file)
conn1.close()
# print file
else:
file = "FALSE"
# print file
conn1.send("\nP2P-CI/1.0 400 Bad Request\n")
conn1.close()
# Spawn new thread process to handle P2S communication
def p2s_thread():
# P2S Connection
s.connect((SERVER_IP, SERVER_PORT))
s.send(CLIENT_IP)
# If running in different machines, uncomment the lines below & comment the line above!
# host_name = socket.gethostname()
# s.send(host_name)
# Receiving a welcome message from server
hello = s.recv(BUFFER_SIZE)
# print hello
# Adding files into Server automatically
filelist =[]
# print os.listdir(".")
for file1 in os.listdir("."):
if file1.endswith(".txt"):
filelist.append(file1)
for i in filelist:
rfc_no_list.append(int(i.split('.txt')[0].split('-')[0]))
rfc_title_list.append(i.split('.txt')[0].split('-')[1])
j=0
for num in rfc_no_list:
tosend = "ADD RFC "+str(num)+" P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"Port: "+str(CLIENT_PORT)+"\n"+"Title: "+rfc_title_list[j]+"\n"
j+=1
s.sendall(tosend)
data = s.recv(BUFFER_SIZE)
print data
# Call P2S Logic
p2s_get_input()
# P2S logic
def p2s_get_input():
user_input = raw_input('>>P2S: Enter your command (ADD/LOOKUP/LIST/P2P): ')
if user_input == "ADD":
while True:
try:
rfc_no = int(raw_input(">> Enter RFC Number: "))
break
except ValueError:
print("Oops! Not a valid number. Try again...")
rfc_title = raw_input(">> Enter RFC Title: ")
tosend = "ADD RFC "+str(rfc_no)+" P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"Port: "+str(CLIENT_PORT)+"\n"+"Title: "+rfc_title+"\n"
s.sendall(tosend)
data = s.recv(BUFFER_SIZE)
print data
p2s_get_input()
elif user_input == "LOOKUP":
while True:
try:
rfc_no = int(raw_input(">> Enter RFC Number: "))
break
except ValueError:
print("Oops! Not a valid number. Try again...")
rfc_title = raw_input(">> Enter RFC Title: ")
tosend = "LOOKUP RFC "+str(rfc_no)+" P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"Port: "+str(CLIENT_PORT)+"\n"+"Title: "+rfc_title+"\n"
s.sendall(tosend)
data = s.recv(BUFFER_SIZE)
print data
p2s_get_input()
elif user_input == "LIST":
tosend = "LIST ALL P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"Port: "+str(CLIENT_PORT)+"\n"
s.sendall(tosend)
data = s.recv(BUFFER_SIZE)
print data
p2s_get_input()
elif user_input == "P2P":
print "Switching to P2P Menu ... \n"
p2p_get_input()
else:
print "\n"
p2s_get_input()
# P2P Logic
def p2p_get_input():
user_input = raw_input('>>P2P: Enter your command (GET/P2S): ')
if user_input == "GET":
# Get RFC number and Title from user
while True:
try:
rfc_no = int(raw_input(">> Enter RFC Number: "))
break
except ValueError:
print("Oops! Not a valid number. Try again...")
rfc_title = raw_input(">> Enter RFC Title: ")
# LOOKUP the RFC from the server through active P2S connection
tosend = "LOOKUP RFC "+str(rfc_no)+" P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"Port: "+str(CLIENT_PORT)+"\n"+"Title: "+rfc_title+"\n"
s.sendall(tosend)
data = s.recv(BUFFER_SIZE)
print data
# Parse the LOOKUP reply
read=data.split(' ')
new_read = data.split('\n')
if new_read[0].split('P2P-CI/1.0 ')[1].split(' ')[0]=="404":
p2p_get_input()
else:
temp=new_read[1].split(' ')
length = len(temp)
client_hostname = temp[length-3]
client_port = temp[length-2]
# Create a new socket to do a "GET" request - P2P
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((str(client_hostname), int(client_port)))
sock.send('HELLO')
hello = sock.recv(BUFFER_SIZE)
tosend = "GET RFC "+str(rfc_no)+" P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"OS: "+OS+"\n"
sock.sendall(tosend)
initial = sock.recv(BUFFER_SIZE)
temp2 = initial.split("\n")[0].split("P2P-CI/1.0 ")[1].split(" ")[0]
if int(temp2)==200:
sock.send("OK")
client_data = sock.recv(BUFFER_SIZE)
# Create new .txt file based off of rfc num
writefile = open(str(rfc_no)+"-"+str(rfc_title)+ ".txt", "w")
#write to new file file
writefile.write(client_data)
writefile.close()
#add new RFC to this clients RFC List
rfc_no_list.append(int(rfc_no))
rfc_title_list.append(rfc_title)
sock.close()
tosend = "ADD RFC "+str(rfc_no)+" P2P-CI/1.0"+"\n"+"Host: "+CLIENT_IP+"\n"+"Port: "+str(CLIENT_PORT)+"\n"+"Title: "+rfc_title+"\n"
s.sendall(tosend)
dta = s.recv(BUFFER_SIZE)
print dta
else:
print initial
sock.close()
p2p_get_input()
elif user_input == "P2S":
print "Switching to P2S Menu ... \n"
p2s_get_input()
else:
print "\n"
p2p_get_input()
# COMMS
# P2S socket on a new thread
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
thread.start_new_thread(p2s_thread, ())
# P2P socket on an infinite loop with multi-threading
c = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
c.bind((CLIENT_IP, CLIENT_PORT))
c.listen(5)
print 'Listening on port 4368 for P2P requests ..'
while 1:
cl, addr = c.accept()
thread.start_new_thread(p2p_thread, (cl, addr))