客戶端應用程序中的套接字未定義錯誤

Question

我正在嘗試爲此腳本創建一個GUI。我想先按連接按鈕以連接到服務器。然後點擊發送發送文件。但是，當我按連接它發送一個空的文本文件和發送按鈕給我一個錯誤，我的套接字沒有定義。

from Tkinter import * 

class Application(Frame): 

def __init__(self, master): 

    Frame.__init__(self, master) 
    self.grid() 
    self.create_widgets() 

def create_widgets(self): 

    self.instruction = Label(self, text = 'Enter ip') 
    self.instruction.grid(row=0, column = 0, columnspan = 2, sticky = W) 

    self.instruction = Label(self, text = 'Enter Port') 
    self.instruction.grid(row=1, column = 0, columnspan = 2, sticky = W) 

    self.instruction = Label(self, text = '  ') 
    self.instruction.grid(row=2, column = 0, columnspan = 2, sticky = W) 

    self.instruction = Label(self, text = 'Enter path') 
    self.instruction.grid(row=5, column = 0, columnspan = 2, sticky = W) 

    self.ip = Entry(self) 
    self.ip.grid(row=0, column = 1, sticky = W) 

    self.port = Entry(self) 
    self.port.grid(row=1, column = 1, sticky = W) 

    self.path = Entry(self) 
    self.path.grid(row=5, column = 1, sticky = W) 

    self.submit_button = Button(self, text='connect', command = self.connect) 
    self.submit_button.grid(row = 1, column = 2, sticky = W) 

    self.send_button = Button(self, text='Send file', command = self.send) 
    self.send_button.grid(row = 5, column = 2, sticky = W) 

    self.text = Text(self, width = 80, height = 5, wrap = WORD) 
    self.text.grid(row = 10, column = 0, columnspan = 3, sticky = W) 

def connect(self): 

    ip = self.ip.get() 
    port = int(self.port.get()) 

    import socket 
    import sys 
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    s.connect((ip, port)) 

    self.text.insert(0.0, 'connecting to' ,ip, port) 

def send(self): 
    path = self.path.get() 
    f=open (path, "rb") 
    l = f.read(1024) 
    while (l): 
     s.send(l) 
     l = f.read(1024) 
    s.close() 

root = Tk() 
root.title("Client") 
root.geometry("420x200") 
app = Application(root) 

root.mainloop() 

這是我的服務器腳本

from Tkinter import * 

import socket 
import sys 

class Application(Frame): 

def __init__(self, master): 

    Frame.__init__(self, master) 
    self.grid() 
    self.create_widgets() 

def create_widgets(self): 

    self.text = Text(self, width = 35, height = 5, wrap = WORD) 
    self.text.grid(row = 0, column = 0, columnspan = 2, sticky = W) 

    self.submit_button = Button(self, text='start', command = self.start) 
    self.submit_button.grid(row = 2, column = 0, sticky = W) 

def start(self): 

    self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    self.text.insert(0.0, 'Server started!\n') 
    self.s.bind(('',1080)) 
    self.s.listen(10) 

    while True: 
     sc, address = self.s.accept() 
     i=1 
     f = open('file_'+ str(i)+".txt",'wb') #open in binary 
     i=i+1 
     while (True):  
      l = sc.recv(1024) 
      while (l): 
       print l 
       f.write(l) 
       f.flush() 
       l = sc.recv(1024) 
     f.close() 

     sc.close() 

    #s.close() 


    root = Tk() 
    root.title("Server") 
    root.geometry("500x250") 
    app = Application(root) 
    root.mainloop() 

Answer 1

s是connect一個局部變量，所以它不是send方法的範圍之內。由於您已經在爲應用程序使用類，因此可以通過將每個s替換爲self.s來存儲對套接字的引用。

也請記住，您的套接字操作在GUI線程上運行，因此您的應用程序在完成執行之前不會響應。作爲一種可能的解決方案，您可以使用threading module在單獨的線程上運行它們。