Python Socket How To Connect TCP Client To Server

In this Python Socket programming i want to show you How To Connect TCP Client To Server.

Also you can check Python Socket Programming Articles

1: Python Socket Programming How To Create Socket

2: Python Socket How To Get Local Machine IP Address

3: Python Socket How To Get Website IP Address

Basics Of Socket

Network programming in any programming language can begin with sockets. But
what is a socket? Simply put, a network socket is a virtual end point where entities
can perform inter-process communication. For example, one process sitting in a
computer, exchanges data with another process sitting on the same or another
computer. We typically label the frst process which initiates the communication
as the client and the latter one as the server.Python has quite an easy way to start with the socket interface.

In order to understand this better, let’s see the big picture first. In the following figure, a flow of client/server
interaction is shown. This will give you an idea of how to use the socket API.

Client Server Interaction Through Socket

In the interaction between a typical client and a server, the server process has to work
a bit more, as you may have thought. After creating a socket object, the server process
binds that socket to a particular IP address and port. This is much like a telephone
connection with an extension number. In a corporate office, after a new employee
has been allocated with his desk phone, usually he or she will be assigned to a new
extension number. So, if anybody makes a phone call to this employee, the connection
can be established using his phone number and extension. After the successful binding,
the server process will start listening for a new client connection. For a valid client
session, the server process can accept the request of the client process. At this point, we
can say that the connection between the server and the client has been established.

Then the client/server enters into the request/response loop. The client process
sends data to the server process, and the server process processes the data and
returns a response to the client. When the client process finishes, it exits by closing
down the connection. At that moment, the server process probably goes back to the
listening state.
The above interaction between client and server is a very simplified representation
of the actual reality.

So now this is the complete code for Python Socket How To Connect TCP Client To Server

import socket

import sys


#Let's try to connect a client socket to a server process. The following code is an
#example of TCP client socket that makes a connection to server socket:




def main():
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)

    except socket.error as e:
        print("Failed To Create A Scoket")
        print("Reason : ", str(e))
        sys.exit()

    print("Socket Created Successfully")

    targetHost = input("Please enter target host name to connect: ")
    targetPort = input("Please enter target port : ")

    try:
        s.connect((targetHost, int(targetPort)))
        print("Socket connected to host " + targetHost + " on port " + targetPort)
        s.shutdown(2)


    except socket.error as e:
        print("Failed connection to host " + targetHost + " on port " + targetPort)
        print("Reason", str(e))
        sys.exit()





if __name__ == "__main__":
    main()

import socket

import sys

#Let's try to connect a client socket to a server process. The following code is an

#example of TCP client socket that makes a connection to server socket:

def main():

try:

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)

except socket.error as e:

print("Failed To Create A Scoket")

print("Reason : ", str(e))

sys.exit()

print("Socket Created Successfully")

targetHost = input("Please enter target host name to connect: ")

targetPort = input("Please enter target port : ")

try:

s.connect((targetHost, int(targetPort)))

print("Socket connected to host " + targetHost + " on port " + targetPort)

s.shutdown(2)

except socket.error as e:

print("Failed connection to host " + targetHost + " on port " + targetPort)

print("Reason", str(e))

sys.exit()

if __name__ == "__main__":

main()

So this line of code is for creating socket in python programming language , also we are handling exceptions for this

 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)

1	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)

Also in here we are going to get the input of host name and port from the user

 targetHost = input("Please enter target host name to connect: ")
 targetPort = input("Please enter target port : ")

1 2	targetHost = input("Please enter target host name to connect: ") targetPort = input("Please enter target port : ")

In here we are going to connect our target host to the port

s.connect((targetHost, int(targetPort)))

1	s.connect((targetHost, int(targetPort)))

So now run the complete code and this will be the result

Python Socket How To Connect TCP Client To Server

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2 thoughts on “Python Socket How To Connect TCP Client To Server”

Ed Williams

September 18, 2019 at 8:35 am

Nice introductory tutorials on sockets. Thanks! Could you please give us a tip on implementing socket connections from PyQt5? Is it the same or do you need to use some PyQt variations to do it? This would make a great addition to your excellent PyQt5 tutorials as well, particularly how to exchange data between a PyQt5 app and another embedded computer (a Raspberry Pi or Arduino, etc).
- Parwiz
  
  September 18, 2019 at 3:02 pm
  
  yea particularity, this will be different in Pyqt5, because pyqt5 has it is own features for network and socket programming i will make a tutorial on that

Comments are closed.