写一个网站目录扫描器

代码如下：

import requests
import time
from threading import *
screenlock=Semaphore(value=500)
print('*************开始**********')
#打开路径字典
def dlistt():
    try:
      global passlist
      global start
      start=time.time()
      passlist = []
      g=open('build.txt','r')
      for x_line in g.readlines():
          passlist.append(x_line)
    except:
        print('[-]读取的目录文件不存在')
#扫描目标
def scanning():
    try:
        url='https://admin.duosecurity.com'
        url2=url+passlist[0]
        url3=url+passlist[1]
        url4=url+passlist[2]
        url5=url+passlist[3]
        screenlock.acquire()
        print('扫描目标:',url)
        screenlock.acquire()
        targetl=requests.get(url2).status_code
        targetl1=requests.get(url3).status_code
        targetl2=requests.get(url4).status_code
        targetl3=requests.get(url5).status_code
        print(url2)
        print('状态码:',targetl)
        print(url3)
        print('状态码:',targetl1)
        print(url4)
        print('状态码:',targetl2)
        print(url5)
        print('状态码:',targetl3)
        end=time.time()
        print('程序运行时间耗时',end-start)
        print( '当前时间:',time.strftime('%Y-%m-%d %H:%M:%S'))
    except:
       # print('[-]未知错误，请反馈给开发者')
        print(time.strftime('%Y-%m-%d %H:%M:%S'))
dlistt()
if __name__ == '__main__':
    t = Thread(target=scanning, args=())
    t.start()

运行结果：