Question

我已经编写了一个telnet服务器和客户端，但我没有收到服务器的响应，我不知道问题出在哪里。

服务器

import socket
import subprocess

def handle_client(client_socket):

MAX_RECV_BUFFER = 1024

allowed_commands = ["ls, cd, ls -l"]

recv_size = 1
while recv_size:

    data_buffer = client_socket.recv(MAX_RECV_BUFFER)
    command = data_buffer.decode("utf-8")

    if not data_buffer:
        print("Client just disconected")
        break

    recv_size = len(data_buffer)

    if command in allowed_commands:
        response = run_command(commad)
        client_socket.send(response.encode("utf-8"))
    data_buffer = ""

def init_server(server_address, reuseAddr=True):

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

try:
    server_socket.bind(server_address)
except socket.error as serr:
    print(str(serr))

server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
if hasattr(socket, "SO_REUSEPORT"):
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)

server_socket.listen(5)

print("Server listen at {}:{}".format(server_address[0], server_address[1]))

try:
    while True:
        client_socket, client_address = server_socket.accept()

        print("Client has connected {}:{}".format(client_address[0], client_address[1]))

        handle_client(client_socket)

except KeyboardInterrupt as kerr:
    print("Server is closing...")
    client_socket.close()
    server_socket.close()

def run_command(commad):
try:
    output = subprocess.check_output(commad, stderr=subprocess.STDOUT, 
shell=True)
except OSError as oserr:
    return output


if __name__ == "__main__":
    init_server(("127.0.0.1",8080))

客户端

import socket

def init_client(server_address):
connected = True
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print('Connecting {} to server ...'.format(server_address))
client_socket.connect(server_address)

while connected:
    # allowed__commands = ['ls, cd, ls-l']
    try:
        if server_address[0] == '127.0.0.1':
            message = input('\nlocalhost@localhost' + '>> ')
        else:
            message = input(server_address[0] + '@' + server_address[1] + 
'>> \n')
        print('Sending message: {}'.format(message))
        client_socket.sendall(message.encode('utf-8'))

        recv_data(client_socket)

    except IOError as e:
        print('Error: {}'.format(e))

    except Exception as e:
        print('Other error: {}'.format(e))

    except KeyboardInterrupt:
            connected = False
def recv_data(client_socket):
recv_size = 1
MAX_RECV_BUFFER = 1024
while recv_size:
    data_buffer = client_socket.recv(MAX_RECV_BUFFER)
    message = data_buffer.decode('utf-8')
    print('Received data: '.format(message))

    if not data_buffer:
        break
    recv_size += len(data_buffer)

data_buffer = ''
client_socket.close()

if __name__ == '__main__':
init_client(('127.0.0.1', 8080))

简单的TELNET服务器

0 个答案: