TypeError: a bytes-like object is required, not 'str' in my server-CodePudding

When I create a server and a clint, I cannot send commands to them this code server to connect clint

import socket

s = socket.socket()
h="192.168.1.2"
p=665
s.bind((h, p))
print ("YOUR SESSION HAS BEEN CREATED IN PORT : ", p)
s.listen(1)
v, addr = s.accept()
print("SUCCESS CONECTION ...", addr)
mssge = input ("==> ")
while mssge != 'e':
    v.send(mssge)
    data = v.recv(1024)
    print (data)
    mssge = input ("==> ")
s.close()

and i go to deffrant terminal and rin clint code and this code clint :-

import subprocess
import socket

s= socket.socket()
h="192.168.1.2"
p=665
s.connect((h, p))
while True:
        data=s.recv(1024)
        if not data:
                break

        co = subprocess.Popen(data, shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
        ct = co.stdout.read()   co.stderr.read()
        cf = str(ct)
        s.send(cf)
s.close()

after connect when i right any commend I have a problem and this error :-

YOUR SESSION HAS BEEN CREATED IN PORT :  665
SUCCESS CONECTION ... ('192.168.1.2', 49508)
==> ls
Traceback (most recent call last):
  File "/root/i.py", line 13, in <module>
    v.send(mssge)
TypeError: a bytes-like object is required, not 'str'

please some help

CodePudding user response：

Socket Programming always transfers data in bytes(set of eight 0s and 1s) When you send, the data you send must be of bytes format.

arr = bytes(mssg, 'utf-8')

arr = bytes(mssg, 'ascii')

can convert your message to bytes, then send this.

On receiving end, Convert these bytes back to str object with

mssg = recieved.decode("utf-8")

CodePudding user response：

umm actually, v.send() requires a bytes-like object, not str, so that input()’s value is a str so that it cannot be. and you can also use this :

v.send(b”msg” b” “ * (128 - len(b”msg”)))

so that if multi-messages can be received because all message len are 64 letters

for receive : v.recv(64)

that’s my answer :D

CodePudding user response：

You must declare your IP address as a byte-string, not a str. This is done by adding a b before the string :

s = socket.socket()
h = b"192.168.1.2"
p = 665
s.connect((h, p))

You can also use the str.encode() method :

s = socket.socket()
h = "192.168.1.2"
p = 665
s.connect((str.encode(h), p))