試圖用telnetlib製作telnet gui

Question

首先這是我在該網站的第一個問題，所以我可能會犯一些基本的錯誤，提前道歉。無論如何，我試圖爲telnet做一個GUI，我用python3作爲編程語言。但是我想連續連接，可惜我無法得到任何輸出，直到我停止程序（tn.write（b「exit \ n」））。我願意接受各種反饋（比如你應該使用套接字或者其他...）任何你給的信息都會被讚賞。 Ps：我只嘗試連接到目前爲止，我只填充連接按鈕。 Ps2：不知何故，我甚至無法完全對付代碼。

from tkinter import * 
import tkinter.messagebox 
import getpass 
import sys 
import telnetlib 



def main(): 

    root= Tk() 

    def tel_net(): 

     username = entry1.get() 
     pw = entry2.get() 
     host_ip= entry3.get()   

     HOST = host_ip 
     user = username 
     password = pw 

     tn = telnetlib.Telnet(HOST) 

     tn.read_until(b"login: ") 
     tn.write(user.encode('ascii') + b"\n") 
     if password: 
      tn.read_until(b"Password: ") 
      tn.write(password.encode('ascii') + b"\n") 

     tn.write(b"ls\n") 
     tn.write(b"exit\n") 
     print(tn.read_all().decode('ascii') 

    def printconnect(): 

     print("connected") 
     tel_net()  

     tkinter.messagebox.showinfo("telnet", "connected") 

    def printdisconnect(): 
     print("disconnected") 
     tn = telnetlib.Telnet(HOST) 
     tn.close(HOST)  

     tkinter.messagebox.showinfo("telnet","disconnected") 
    def quitwindow(): 
     answer = tkinter.messagebox.askquestion("telnet","Do you want to quit ?") 
     if answer == "yes": 
      root.destroy() 

    button1 = Button(root, text="Connect", command=printconnect, fg="green") 
    button2 = Button(root, text="Disconnect", command=printdisconnect, fg="red") 
    button3 = Button(root, text="Exit", command=quitwindow, fg="purple") 


    button1.grid(row=3, column=0, sticky = E) 
    button2.grid(row=3, column=1, sticky = E) 
    button3.grid(row=3, column=2, sticky = E) 



    label1 = Label(root, text="Username") 
    label2 = Label(root, text= "Password") 
    label3 = Label(root, text="Host ip") 



    entry1 = Entry(root) 
    entry2 = Entry(root) 
    entry3 = Entry(root) 
    entry2.config(show="*"); 

    label1.grid(row=0, column=0, sticky = W) 
    label2.grid(row=1, column=0, sticky = W) 
    label3.grid(row=2, column=0, sticky = W) 

    entry1.grid(row=0, column=1, sticky = W) 
    entry2.grid(row=1, column=1, sticky = W) 
    entry3.grid(row=2, column=1, sticky = W) 

    c1=Checkbutton(root, text="Remember username") 
    c1.grid(columnspan=2,sticky = W) 
    c2=Checkbutton(root, text="Remember password") 
    c2.grid(columnspan=2,sticky = W) 
    root.mainloop() 
if __name__ == "__main__": 
    main() 

Answer 1

由於telnet通信阻塞，所以需要將實際的通信放入GUI的單獨線程中。您還需要對所有讀取操作進行超時，然後檢查是否有任何寫入操作要在讀取之間執行。