利用Python找出9个连续的空闲端口

这篇文章主要介绍了Python找出9个连续的空闲端口的方法，感兴趣的小伙伴们可以参考一下

def isInuse(ipList, port):
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  flag=True
  for ip in ipList:
    try:
      s.connect((ip, int(port)))
      s.shutdown(2)
      print '%d is inuse' % port
      flag=True
      break
    except:
      print '%d is free' % port
      flag=False
  return flag 

def getLocalIp():
  localIP = socket.gethostbyname(socket.gethostname())
  return localIP 

import sys
import os
import socket


def isInuse(ipList, port):
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  flag=True
  for ip in ipList:
    try:
      s.connect((ip, int(port)))
      s.shutdown(2)
      print '%d is inuse' % port
      flag=True
      break
    except:
      print '%d is free' % port
      flag=False
  return flag


def getLocalIp():
  localIP = socket.gethostbyname(socket.gethostname())
  return localIP

def checkNinePort(startPort):
  flag = True
  ipList = ("127.0.0.1","0.0.0.0",getLocalIp())
  for i in range(1, 10):
    if (isInuse(ipList, startPort)):
      flag = False
      break
    else:
      startPort = startPort + 1
  return flag, startPort


def findPort(startPort):
  while True:
    flag, endPort = checkNinePort(startPort)
    if (flag == True): #ninePort is ok
      break
    else:
      startPort = endPort + 1
  return startPort


def main():
  startPort=51988
  # startPort = int(sys.argv[1])
  print findPort(startPort)

main() 

netstat - tnpl | grep 321

tcp 0 0 10.173.1.208:3211 0.0.0.0:* LISTEN 55563/***
tcp 0 0 0.0.0.0:3212 0.0.0.0:* LISTEN 55586/***
tcp 0 0 10.173.1.208:3213 0.0.0.0:* LISTEN 55707/***
tcp 0 0 0.0.0.0:3214 0.0.0.0:* LISTEN 54272/java
tcp 0 0 0.0.0.0:3215 0.0.0.0:* LISTEN 54272/java
tcp 0 0 10.173.1.208:3216 0.0.0.0:* LISTEN 54822/***
tcp 0 0 10.173.1.208:3217 0.0.0.0:* LISTEN 34959/***
tcp 0 0 10.173.1.208:3218 0.0.0.0:* LISTEN 54849/*** 

author = 'I316736'
import os
import platform
import sys


def isInuseWindow(port):
  if os.popen('netstat -an | findstr :' + str(port)).readlines():
    portIsUse = True
    print '%d is inuse' % port
  else:
    portIsUse = False
    print '%d is free' % port
  return portIsUse

def isInuseLinux(port):
  #lsof -i:4906
  #not show pid to avoid complex
  if os.popen('netstat -na | grep :' + str(port)).readlines():
    portIsUse = True
    print '%d is inuse' % port
  else:
    portIsUse = False
    print '%d is free' % port
  return portIsUse

def isInuseAix(port):
  if os.popen('netstat -Aan | grep "\.' + str(port) + ' "').readlines():
    portIsUse = True
    print '%d is inuse' % port
  else:
    portIsUse = False
    print '%d is free' % port
  return portIsUse

def isInuseHp(port):
  if os.popen('netstat -an | grep "\.' + str(port) + ' "').readlines():
    portIsUse = True
    print '%d is inuse' % port
  else:
    portIsUse = False
    print '%d is free' % port
  return portIsUse

def isInuseSun(port):
  if os.popen('netstat -an | grep "\.' + str(port) + ' "').readlines():
    portIsUse = True
    print '%d is inuse' % port
  else:
    portIsUse = False
    print '%d is free' % port
  return portIsUse

def choosePlatform():
  #'Windows-7-6.1.7601-SP1'
  #'AIX-1-00F739CE4C00-powerpc-32bit'
  #'HP-UX-B.11.31-ia64-32bit'
  #'Linux-3.0.101-0.35-default-x86_64-with-SuSE-11-x86_64'
  #'SunOS-5.10-sun4u-sparc-32bit-ELF'
  machine = platform.platform().lower()
  if 'windows-' in machine:
    return isInuseWindow
  elif 'linux-' in machine:
    return isInuseLinux
  elif 'aix-' in machine:
    return isInuseAix
  elif 'hp-' in machine:
    return isInuseHp
  elif 'sunos-' in machine:
    return isInuseSun
  else:
    print 'Error, sorry, platform is unknown'
    exit(-1)

def checkNinePort(startPort):
  isInuseFun = choosePlatform()
  nineIsFree = True
  for i in range(1, 10):
    if (isInuseFun(startPort)):
      nineIsFree = False
      break
    else:
      startPort = startPort + 1
  return nineIsFree, startPort


def findPort(startPort):
  while True:
    flag, endPort = checkNinePort(startPort)
    if (flag == True): # ninePort is ok
      break
    else:
      startPort = endPort + 1
  return startPort


def main(startPort):
  firstPort=findPort(startPort)
  print 'First port of nine free ports is ', firstPort

if name == 'main' :
  if len(sys.argv) > 1:
    print len(sys.argv)
    startPort = int(sys.argv[1])
  else:
    startPort = 500
  main(startPort) 

 netstat -tnpl 

-tnpl 各个参数的含义
-l或--listening  显示监控中的服务器的Socket。
-n或--numeric  直接使用IP地址，而不通过域名服务器。
-p或--programs  显示正在使用Socket的程序识别码和程序名称。
-t或--tcp  显示TCP传输协议的连线状况

----------

tcp 0 0 10.173.1.208:4903 0.0.0.0:* LISTEN 54849/jsagent
最后的54849/jsagent 表示 进程号 54849 进程名 jsagent 

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