python 使用httplib模块实现监测web服务

以下程序均来自《Python.UNIX和Linux系统管理指南》

httplib_check_web.py
#!/usr/bin/env python
import httplib
import sys
def check_webserver(address, port, resource):
        if not resource.startswith('/'):
                resource = '/' + resource
        try:
                conn = httplib.HTTPConnection(address, port)
                print 'HTTP connection created successfully'
                req = conn.request('GET', resource)
                print 'request for %s successful' % resource
                response = conn.getresponse()
                print 'response status: %s' % response.status
        except httplib.error, e:
                print "HTTP connection failed: %s" % e
                return False
        finally:
                conn.close()
                print 'HTTP connection closed successfully'
        if response.status in [200, 301]:
                return True
        else:
                return False
if __name__ == '__main__':
        from optparse import OptionParser
        parser = OptionParser()
        parser.add_option("-a", "--address", dest="address", default="localhost", help="ADDRESS for webserver", metavar="ADDRESS")
        parser.add_option("-p", "--port", dest="port", type="int", default=80, help="PORT for webserver", metavar="PORT")
        parser.add_option("-r", "--resource", dest="resource", default="index.html", help="RESOURCE to check", metavar="RESOURCE")
        (options, args) = parser.parse_args()
        print 'options: %s, args: %s' %(options, args)
        check = check_webserver(options.address, options.port, options.resource)
        print 'check_webserver returned %s' % check
        sys.exit(not check)

运行结果：

成功

[root@centos python]# python httplib_check_web.py -a 192.168.137.2 -r index.html

options: {'resource': 'index.html', 'port': 80, 'address': '192.168.137.2'}, args: []

HTTP connection created successfully

request for /index.html successful

response status: 200

HTTP connection closed successfully

check_webserver returned True

不成功，网页不存在的情况

[root@centos python]# python httplib_check_web.py -a 192.168.137.2 -r ppp.html

options: {'resource': 'ppp.html', 'port': 80, 'address': '192.168.137.2'}, args: []

HTTP connection created successfully

request for /ppp.html successful

response status: 404

HTTP connection closed successfully

check_webserver returned False