Socket programming in python

import socket
import sys
from thread import *
HOST = '' # Symbolic name meaning all available interfaces
PORT = 8888 # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'Socket created'
#Bind socket to local host and port
try:
s.bind((HOST, PORT))
except socket.error , msg:
print 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]
sys.exit()
print 'Socket bind complete'
#Start listening on socket
s.listen(10)
print 'Socket now listening'
#Function for handling connections. This will be used to create threads
def clientthread(conn):
#Sending message to connected client
conn.send('Welcome to the server. Type something and hit enter\n') #send only takes string
#infinite loop so that function do not terminate and thread do not end.
while True:
#Receiving from client
data = conn.recv(1024)
reply = 'OK...' + data
if not data:
break
conn.sendall(reply)
#came out of loop
conn.close()

#now keep talking with the client
while 1:
#wait to accept a connection - blocking call
conn, addr = s.accept()
print 'Connected with ' + addr[0] + ':' + str(addr[1])
#start new thread takes 1st argument as a function name to be run, second is the tuple of arguments to the function.
start_new_thread(clientthread ,(conn,))
s.close()

import socket #for sockets

import sys #for exit

#create an INET, STREAMing socket

try:

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

except socket.error:

print 'Failed to create socket'

sys.exit()

print 'Socket Created'

host = 'www.google.com';

port = 80;

try:

remote_ip = socket.gethostbyname( host )

except socket.gaierror:

#could not resolve

print 'Hostname could not be resolved. Exiting'

sys.exit()

#Connect to remote server

s.connect((remote_ip , port))

print 'Socket Connected to ' + host + ' on ip ' + remote_ip

#Send some data to remote server

message = "GET / HTTP/1.1\r\n\r\n"

try :

#Set the whole string

s.sendall(message)

except socket.error:

#Send failed

print 'Send failed'

sys.exit()

print 'Message send successfully'

#Now receive data

reply = s.recv(4096)

print reply

** [Send Data]**

import socket #for sockets

import sys #for exit

try:

#create an AF_INET, STREAM socket (TCP)

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

except socket.error, msg:

print 'Failed to create socket. Error code: ' + str(msg[0]) + ' , Error message : ' + msg[1]

sys.exit();

print 'Socket Created'

host = 'www.google.com'

port = 80

try:

remote_ip = socket.gethostbyname( host )

except socket.gaierror:

#could not resolve

print 'Hostname could not be resolved. Exiting'

sys.exit()

print 'Ip address of ' + host + ' is ' + remote_ip

#Connect to remote server

s.connect((remote_ip , port))

print 'Socket Connected to ' + host + ' on ip ' + remote_ip

#Send some data to remote server

message = "GET / HTTP/1.1\r\n\r\n"

try :

#Set the whole string

s.sendall(message)

except socket.error:

#Send failed

print 'Send failed'

sys.exit()

print 'Message send successfully'

import socket

import sys

HOST = '' # Symbolic name meaning all available interfaces

PORT = 8888 # Arbitrary non-privileged port

# Datagram (udp) socket

try :

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

print 'Socket created'

except socket.error, msg :

print 'Failed to create socket. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]

sys.exit()

# Bind socket to local host and port

try:

s.bind((HOST, PORT))

except socket.error , msg:

print 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]

sys.exit()

print 'Socket bind complete'

#now keep talking with the client

while 1:

# receive data from client (data, addr)

d = s.recvfrom(1024)

data = d[0]

addr = d[1]

if not data: 

break

reply = 'OK...' + data

s.sendto(reply , addr)

print 'Message[' + addr[0] + ':' + str(addr[1]) + '] - ' + data.strip()

s.close()

import socket #for sockets

import sys #for exit

# create dgram udp socket

try:

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

except socket.error:

print 'Failed to create socket'

sys.exit()

host = 'localhost';

port = 8888;

while(1) :

msg = raw_input('Enter message to send : ')

try :

#Set the whole string

s.sendto(msg, (host, port))

# receive data from client (data, addr)

d = s.recvfrom(1024)

reply = d[0]

addr = d[1]

print 'Server reply : ' + reply

except socket.error, msg:

print 'Error Code : ' + str(msg[0]) + ' Message ' + msg[1]

sys.exit()