Python socket的客戶端

做一個socket客戶端
1、聲明一個實例
2、綁定端口號和地址
3、循環發送和接收響應
其中要注意粘包的產生，為了防止粘包的產生，應該在服務器端先測出要發送信息的大小，
然后發送響應至客戶端，等到服務器上一條信息發送完畢，客戶再響應准備好接收下一條信息
這樣就不會有粘包的產生
import socket
client = socket.socket()

client.connect(('localhost',9999))

while True:
    cmd = input(">>:").strip()
    if len(cmd) == 0:continue
    client.send(cmd.encode("utf-8"))
    cmd_res_size = client.recv(1024)
    print("命令結果大小：",cmd_res_size)
    client.send("我准備好了".encode("utf-8"))  #響應服務器端發送請求，為防止粘包的產生
    received_size = 0
    received_data =b''
    while received_size < int(cmd_res_size.decode()):
        data = client.recv(1024)
        received_size += len(data)
        received_data += data
    else:
        print("cmd res receive done...",received_size)
        print(received_data.decode())

client.close()