Python connect to socket file

Limitations:

Before we proceed further we should know that there are some limitations of this program.

• Python3+ should be installed to run this program. You may observe error or different behavior if run on python older versions.
• Only text file can be transferred through this program as of now. Any other format file which does not contain text may fail.
• Basic programming exceptions have been handled in the program.
• Program may or may not run on other OS than Ubuntu.
• Text file should be short at client side as buffer size of 1024 bytes has been used.

Set up requirements:

• We need at least one Linux system to try out this program. But recommendation is to use two different Linux systems which are connected through network.
• Two systems should be connected through Ethernet or Wi-Fi or any other connections.

Server Source Code:

Client Source Code:

# Importing libraries
import socket
import sys

# Lets catch the 1st argument as server ip
if ( len ( sys . argv ) > 1 ) :
ServerIp = sys . argv [ 1 ]
else :
print ( » \n \n Run like \n python3 client.py \n \n » )
exit ( 1 )

# Now we can create socket object
s = socket . socket ( )

# Lets choose one port and connect to that port
PORT = 9898

# Lets connect to that port where server may be running
s. connect ( ( ServerIp , PORT ) )

# We can send file sample.txt
file = open ( «sample.txt» , «rb» )
SendData = file . read ( 1024 )

while SendData:
# Now we can receive data from server
print ( » \n \n ################## Below message is received from server ################## \n \n » , s. recv ( 1024 ) . decode ( «utf-8» ) )
#Now send the content of sample.txt to server
s. send ( SendData )
SendData = file . read ( 1024 )

# Close the connection from client side
s. close ( )

How to run programs and expected output:

Here are the steps to execute the program.

Step1: Go to B_server system and open a terminal. Short cut to open a terminal is Alt+Ctrl+t.

Step2: Now go the path where server.py is present.

Step3: Now run server.py like below

There should not be any errors and you should see below prints

Copied file name will be recv.txt at server side

Step4: Now open terminal at A_client system.

Step5: Go to the path where client.py and sample.txt are present.

Step6: Now run client.py like below

We have observed that we need to know the IP address of server. We can execute below command to know the IP address of B_server system.

Now output of A_client system should be like this

Step7: Now go to B_server and look for below output

Step8: There should be one file name recv.txt at server folder. The content of this recv.txt should be same sample.txt.

So we have successfully copied a file from client to server over network through python program.

Code explanations:

There are two python files server.py and client.py.

Note that we will explain once if any code is same inside server.py and client.py.

This is shebang line which means by default this server.py should use python3. Let’s see one advantage of this line.

We have executed the server.py or client.py like python3 . Now without using python3 we can execute the python file. Follow below commands

Give all permission to .py file:

Источник