Python2.7 套接字错误 37“操作已在进行中”

Question

I'm making a script that reads a file full of proxy servers and checks if they are up or down.

import socket

proxyFile = open("proxies.txt","r");
lines = proxyFile.readlines();

class Colors:
    none = "\033[0m";
    red = "\033[31m";
    green = "\033[32m";
    yellow = "\033[33m";
    blue = "\033[34m";
    purple = "\033[35m";
    cyan = "\033[36m";

sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM);
sock.settimeout(3);

for line in lines:
    line = line.replace(":"," : ");
    reader = line.split();
    ip = reader[reader.index(":") - 1];
    port = int(reader[reader.index(":") + 1]);
    try:
        sock.connect((ip,port));
        print Colors.cyan + ip + ":" + str(port) + Colors.none + " is " + Colors.green + "UP";
        sock.close();
    except socket.timeout:
        print Colors.cyan + ip + Colors.yellow + ":" + Colors.cyan + str(port) + Colors.none + " is " + Colors.red + "DOWN";

It seems that the file reads fine and the socket creates, but it only connects to one server then it gives the error.

Proxy File:

1.0.134.56:8080
1.165.192.248:3128
1.172.185.143:53281
1.179.156.233:8080
1.179.164.213:8080
1.179.185.253:8080
1.192.242.191:3128
1.20.169.166:8080
1.20.179.68:8080
1.20.99.163:8080

Answer 1

You can't re- connect a socket. Once it's connected, it's connected. Even if you call close :

all future operations on the socket object will fail.

The right answer is to create a new socket each time through the loop, whether with create_connection or with socket and connect . For example, change your try block to this:

try:
    sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM);
    sock.settimeout(3);
    sock.connect((ip,port));
    print Colors.cyan + ip + ":" + str(port) + Colors.none + " is " + Colors.green + "UP";
    sock.close();
except socket.timeout:
    print Colors.cyan + ip + Colors.yellow + ":" + Colors.cyan + str(port) + Colors.none + " is " + Colors.red + "DOWN";