TypeError: a bytes-like object is required, not 'str' when I'm inputting command in console

Question

我正在尝试使用 python 中的套接字模块连接到服务器。但是，我收到如下所示的错误消息。

TypeError: a bytes-like object is required, not 'str'

这是我的代码：

import socket
HOST = '0.0.0.0'
PORT = 12345

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind((HOST, PORT))


server_socket.listen(5)
print("\n[*] Listening on port " +str(PORT)+ ", waiting for connexions. ")


client_socket, (client_ip, client_port) = server_socket.accept()
print("[*] Client " +client_ip+ " connected \n")


while True:
    try:
        command = input(client_ip+ ">")
        if(len(command.split()) != 0):
            client_socket.send(command)

        else:
            continue

    except(EOFError):
        print("Invalid input, type 'help' to get a list of implented commands. \n")

        continue

    if(command == "quit"):
        break


    data = client_socket.recv(1024)
    print(data + "\n")


client_socket.close()

是什么导致了这个TypeError？我应该怎么做才能解决这个问题？我也乐于接受任何改进我的 python 套接字代码编写的建议。

Answer 1

很简单，只需将字符串转换为 byte-wise 对象

string = "example string"
byte_wise_string = string.encode("utf-8")

希望能帮到你

问候

Answer 2

https://docs.python.org/3/library/socket.html?highlight=socket#socket.socket.send

你想要

encode发送前的字符串转字节对象：client_socket.send(command.encode())
和 decode 当您在打印中连接时返回字符串：print(data.decode() + "\n")

Answer 3

此错误是因为 python 期望通过套接字发送的是字节而不是字符串。
因此，您必须在发送之前将字符串转换为字节。您可以使用 encode() 将字符串转换为字节，并使用 decode() 将收到的字节转换为字符串。
我已经更新了你的代码，请参考下面，这应该可以正常工作。

import socket
HOST = '0.0.0.0'
PORT = 12345

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind((HOST, PORT))


server_socket.listen(5)
print("\n[*] Listening on port " +str(PORT)+ ", waiting for connexions. ")


client_socket, (client_ip, client_port) = server_socket.accept()
print("[*] Client " +client_ip+ " connected \n")


while True:
    try:
        command = input(client_ip+ ">")
        if(len(command.split()) != 0):
            client_socket.send(command.encode('utf-8')) #Encoding required here

        else:
            continue

    except(EOFError):
        print("Invalid input, type 'help' to get a list of implented commands. \n")

        continue

    if(command == "quit"):
        break


    data = client_socket.recv(1024)
    print(data.decode('utf-8') + "\n") #Decoding required here


client_socket.close()

TypeError: a bytes-like object is required, not 'str' when I'm inputting command in console

TypeError: a bytes-like object is required, not 'str' when I'm inputting command in console

python

sockets

python-sockets