如何使服务器接受来自多个端口的连接? [英] How to make server accepting connections from multiple ports?

问题描述

如何使一个简单的服务器(如接受连接并打印到终端一样简单)接受来自多个端口或端口范围的连接?

How can I make a simple server(simple as in accepting a connection and print to terminal whatever is received) accept connection from multiple ports or a port range?

我必须使用多个线程，每个绑定调用一个.还是有其他解决方案?

Do I have to use multiple threads, one for each bind call. Or is there another solution?

简单的服务器可能看起来像这样.

The simple server can look something like this.

def server():
import sys, os, socket

port = 11116
host = ''
backlog = 5 # Number of clients on wait.
buf_size = 1024

try:
    listening_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    listening_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1) 
    listening_socket.bind((host, port)) 
    listening_socket.listen(backlog)
except socket.error, (value, message):
    if listening_socket:
        listening_socket.close()
    print 'Could not open socket: ' + message
    sys.exit(1)

while True:
    accepted_socket, adress = listening_socket.accept()

    data = accepted_socket.recv(buf_size)
    if data:
        accepted_socket.send('Hello, and goodbye.')
    accepted_socket.close()

server()

这是如何完成此操作的示例.谢谢大家.

This is an example of how it can be done. Thanks everyone.

import socket, select

def server():
import sys, os, socket

port_wan = 11111
port_mob = 11112
port_sat = 11113

sock_lst = []
host = ''
backlog = 5 # Number of clients on wait.
buf_size = 1024

try:
    for item in port_wan, port_mob, port_sat:
        sock_lst.append(socket.socket(socket.AF_INET, socket.SOCK_STREAM))
        sock_lst[-1].setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1) 
        sock_lst[-1].bind((host, item)) 
        sock_lst[-1].listen(backlog)
except socket.error, (value, message):
    if sock_lst[-1]:
        sock_lst[-1].close()
        sock_lst = sock_lst[:-1]
    print 'Could not open socket: ' + message
    sys.exit(1)

while True:
    read, write, error = select.select(sock_lst,[],[])

    for r in read:
        for item in sock_lst:
            if r == item:
                accepted_socket, adress = item.accept()

                print 'We have a connection with ', adress
                data = accepted_socket.recv(buf_size)
                if data:
                    print data
                    accepted_socket.send('Hello, and goodbye.')
                accepted_socket.close()

server()

推荐答案

我不是python专家，但您感兴趣的功能是"select".这样一来，您就可以观看多个套接字，并在其中任何一个发生活动时中断.

I'm not a python guy, but the function you are interested in is "select". This will allow you to watch multiple sockets and breaks out when activity occurs on any one of them.

这是一个使用select 的 python示例.

Here's a python example that uses select.

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