使用python套接字發送/接收數據

Question

我有一個 vpn（使用 OpenVPN），其中有多個客戶端連接到服務器（在 DigitalOcean）。 連接非常好，當它們通過 ssh 連接到各自的路由器時，我能夠訪問位於各自防火牆后面的每個客戶端。 我想使用 python 腳本自動將文件從多個客戶端發送到服務器，反之亦然。 這是我目前使用的代碼：

服務器：

#!/usr/bin/env python

import socket
from threading import Thread
from SocketServer import ThreadingMixIn

class ClientThread(Thread):

    def __init__(self,ip,port):
        Thread.__init__(self)
        self.ip = ip
        self.port = port
        print "[+] New thread started for "+ip+":"+str(port)


    def run(self):
        while True:
            data = conn.recv(2048)
            if not data: break
            print "received data:", data
            conn.send(data)  # echo

TCP_IP = '0.0.0.0'
TCP_PORT = 62
BUFFER_SIZE = 1024  # Normally 1024


tcpsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcpsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
tcpsock.bind((TCP_IP, TCP_PORT))
threads = []

while True:
    tcpsock.listen(4)
    print "Waiting for incoming connections..."
    (conn, (ip,port)) = tcpsock.accept()
    newthread = ClientThread(ip,port)
    newthread.start()
    threads.append(newthread)

for t in threads:
    t.join()

客戶：

#!/usr/bin/env python

import socket


TCP_IP = '10.8.0.1'
TCP_PORT = 62

BUFFER_SIZE = 1024
MESSAGE = "Hello, World!"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))
s.send(MESSAGE)
data = s.recv(BUFFER_SIZE)
s.close()

print "received data:", data

問題是我無法獲得連接。 服務器只打印“等待傳入連接...”，客戶端似乎沒有找到通往服務器的路。 有沒有人可以看看這個並給我一些關於我做錯了什么的反饋？

Answer 1

你能試試這樣的嗎？

import socket
from threading import Thread


class ClientThread(Thread):

    def __init__(self,ip,port):
    Thread.__init__(self)
    self.ip = ip
    self.port = port
    print "[+] New thread started for "+ip+":"+str(port)


def run(self):
    while True:
        data = conn.recv(2048)
        if not data: break
        print "received data:", data
        conn.send(b"<Server> Got your data. Send some more\n")

TCP_IP = '0.0.0.0'
TCP_PORT = 62
BUFFER_SIZE = 1024  # Normally 1024
threads = []

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind(("0.0.0.0", 5000))
server_socket.listen(10)

read_sockets, write_sockets, error_sockets = select.select([server_socket], [], [])

while True:
    print "Waiting for incoming connections..."
    for sock in read_sockets:
        (conn, (ip,port)) = server_socket.accept()
        newthread = ClientThread(ip,port)
        newthread.start()
        threads.append(newthread)

for t in threads:
    t.join()

現在客戶端將有如下內容：

import socket, select, sys

TCP_IP = '0.0.0.0'
TCP_PORT = 62

BUFFER_SIZE = 1024
MESSAGE = "Hello, Server. Are you ready?\n"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, 5000))
s.send(MESSAGE)
socket_list = [sys.stdin, s]

while 1:
    read_sockets, write_sockets, error_sockets = select.select(socket_list, [], [])


    for sock in read_sockets:
        # incoming message from remote server
        if sock == s:
            data = sock.recv(4096)
            if not data:
                print('\nDisconnected from server')
                sys.exit()
            else:
                sys.stdout.write("\n")
                message = data.decode()
                sys.stdout.write(message)
                sys.stdout.write('<Me> ')
                sys.stdout.flush()

        else:
            msg = sys.stdin.readline()
            s.send(bytes(msg))
            sys.stdout.write('<Me> ')
            sys.stdout.flush()

輸出如下：

對於服務器 -

Waiting for incoming connections...
[+] New thread started for 127.0.0.1:52661
received data: Hello, World!
Waiting for incoming connections...

received data: Hi!

received data: How are you?

對於客戶 -

<Server> Got your data. Send some more
<Me> Hi!
<Me> 
<Server> Got your data. Send some more
<Me> How are you?
<Me> 
<Server> Got your data. Send me more
<Me>

如果您想在客戶端和服務器之間建立一個開放的連接，只需在無限的 while 循環中保持客戶端打開，您也可以在服務器端進行一些消息處理。 如果您需要，我可以相應地編輯答案。 希望這可以幫助。