Pyhton程式設計：socket實作ssh通訊

伺服器端

import socket
import os

server = socket.socket()

server.bind(("localhost", 6969)) # 綁定監聽端口

server.listen(5)  # 監聽

print("監聽開始..")

while True:
    conn, addr = server.accept()  # 等待連接配接

    print("conn:", conn, "\naddr:", addr)  # conn連接配接執行個體

    while True:
        data = conn.recv(1024)  # 接收
        if not data:  # 用戶端已斷開
            print("用戶端斷開連接配接")
            break

        print("收到的指令：", data.decode("utf-8"))
        res = os.popen(data.decode("utf-8")).read()

        print("發送的大小：", len(res))
        conn.send(str(len(res)).encode("utf-8"))  # 先發送長度
        confirm = conn.recv(1024)  # 等待确認，解決粘包問題
        print(res)

        conn.send(res.encode("utf-8"))  # 再發送内容

server.close()      

用戶端

import socket

client = socket.socket()  # 生成socket連接配接對象

ip_port =("localhost", 6969)  # 位址和端口号

client.connect(ip_port)  # 連接配接

print("伺服器已連接配接")

while True:
    content = input(">>")

    if len(content)==0: continue  # 如果傳入空字元會阻塞

    client.send(content.encode("utf-8"))  # 傳送和接收都是bytes類型

    receive_size = client.recv(1024)  # 先接收長度，建議8192

    data_size = int(receive_size.decode("utf-8"))

    print("接收到的大小：", data_size)
    client.send("準備好接收".encode("utf-8"))
    datas = ""

    while len(datas) < data_size:
        data = client.recv(1024)  # 多次接收内容，接收大資料
        datas += data.decode("utf-8")

    print(len(datas), datas)  # 解碼

client.close()