我尝试将数据发送到客户端，这是Python中聊天服务器开发过程的一部分。目前客户端有一个GUI，但服务器是从命令行运行的。我已在下面列出了完整的代码。
客户端
from tkinter import *
import socket
host = socket.gethostname()
port = 8000
s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
class Application(Frame):
def __init__(self, master=None):
#Create master frame
Frame.__init__(self,master)
self.grid()
self.master.title("Test 1")
self.conn=False #State of connection to server
#Configure main frame
for r in range (4):
self.master.rowconfigure(r, weight=1)
for c in range (2):
self.master.columnconfigure(c)
#Create sub frames
TopFrame=Frame(master, bg="red")
TopFrame.grid(row=0, column=0, rowspan=3)
BottomFrame=Frame(master, bg="blue")
BottomFrame.grid(row=4, column=0)
SideFrame=Frame(master, bg="green")
SideFrame.grid(column=1, row=0, rowspan=4)
#Create Chat log
self.chatlog=Text(TopFrame)
self.chatlog.pack(padx=5, pady=5)
#Create entry field
self.e1=StringVar()
self.e1=Entry(BottomFrame)
self.e1.pack(pady=5, padx=5)
#Create buttons
b1=Button(SideFrame, text="Connect", command=self.connect)
b1.grid(row=0, column=0, padx=5, pady=5)
b2=Button(SideFrame, text="Disconnect", command=self.disconnect)
b2.grid(row=1, column=0, padx=5, pady=5)
b3=Button(SideFrame, text="Send", command=self.sendmessage)
b3.grid(row=2, column=0, padx=5, pady=5)
def connect(self): #Connect to server
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===ATTEMPTING TO CONNECT TO SERVER\n"))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
try:
s.connect((host,port))
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===CONNECTED TO SERVER\n"))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
self.conn=True
print("Connected") #Connection successful
#Receive messages
self.receive_msg()
except ConnectionRefusedError: #Can't find server
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===SERVER COULD NOT BE FOUND\n" + "===PLEASE MAKE SURE THE SERVER IS ON, AND YOU'RE CONNECTED TO THE NETWORK\n"))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
except: #Other errors
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===THERE'S AN ERROR WITH THE PROGRAM\n" + "===PLEASE TURN IT OFF AND ON AGAIN\n"))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
# When attempting to connect a second time, produces OS error: an operation was attempted on something that is not a socket
def disconnect(self):
if self.conn: #Tests to see if client is connected
s.close()
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===DISCONNECTED FROM SERVER.\n"))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
self.conn=False
else: #Prevents attempting to disconnect when already disconnected
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===YOU AREN'T CURRENTLY CONNECTED.\n"))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
def sendmessage(self):
if self.conn: #Prevents sending if not connected
self.msg=self.e1.get()
if self.msg == "": #Empty message catcher
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===YOU CANNOT SEND AN EMPTY MESSAGE.\n" ))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
else:
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ('You: ' + self.msg + '\n'))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
self.send_data(self.msg) #Sends message
else:
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===YOU ARE NOT CONNECTED TO A SERVER. YOU CANNOT SEND A MESSAGE.\n" ))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
def receive_msg(self):
#Prepared to receive message
print("Preparing to receive")
while 1:
data=s.recv(1024)
decoded_data=data.decode('UTF-8')
print(decoded_data) #Only printing to cmd line for now, to resolve errors
#self.mainloop() ##Only fix I've found. This loop seems to crash the mainloop used to update GUI
def send_data(self, message):
try:
s.send(message.encode('UTF-8'))
except:
self.chatlog['state'] = NORMAL
self.chatlog.insert(END, ("===THE PREVIOUS MESSAGE DIDN'T SEND. THIS IS POSSIBLY DUE TO A SERVER ERROR.\n"))
self.chatlog['state'] = DISABLED
self.chatlog.yview(END)
root = Tk()
app = Application(root)
app.mainloop()
服务器
import socket
host=socket.gethostname()
port=(8000)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
def connect():
s.bind((host,port))
s.listen(2)
print("Server listening")
conn,addr=s.accept()
print("Connected")
send(conn)
# def receive(conn):
# while 1:
# try:
# data=conn.recv(1024)
# decoded_data=data.decode('UTF-8')
# if not decoded_data:
# print("No data")
# else:
# print("New data")
# print(decoded_data)
def send(conn):
while 1:
data=input("Input data to send: ")
encoded_data=data.encode('UTF-8')
conn.send(encoded_data)
我遇到的问题是始终准备好接收新消息的receive_msg（）循环会停止主循环以保持GUI更新。我已经评论了关于调用app.mainloop（）的行，但这意味着我只在mainloop在receive_msg循环内无限回忆之前收到一条消息。任何人都可以帮我解决问题吗？
答案 0 :(得分：0)
您可以使用multiprocessing.connection Listener and Client.
喜欢这个。
服务器
from multiprocessing.connection import Listener
listener = Listener(("", 25000), authkey=b"selam")
client = listener.accept()
while 1:
try:
print(client.recv_bytes())
except EOFError:
print("Connection closed")
break
客户
from multiprocessing.connection import Client
remote = Client(("", 25000), authkey=b"selam")
...
...
class Application(Frame):
...
...
def sendmessage(self):
remote.send_bytes(self.e1.get().encode('ascii'))
....