以下程序均来自《Python.UNIX和Linux系统管理指南》
检测端口
check_tcp_port.py
#!/usr/bin/env python
import socket
import re
import sys
def check_server(address, port):
s = socket.socket()
print "Attempting to connect to %s on port %s" %(address, port)
try:
s.connect((address, port))
print "Connected to %s on port %s" % (address, port)
return True
except socket.error, e:
print "Connection to %s on port %s failed: %s" % (address, port, e)
return False
if __name__ == '__main__':
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-a", "--address", dest="address", default="localhost", help="ADDRESS for server", metavar='ADDRESS')
parser.add_option("-p", "--port", dest="port", type="int", default=80, help="PORT for server", metavar="PORT")
(options, args) = parser.parse_args()
print 'options: %s, args: %s' %(options, args)
check = check_server(options.address, options.port)
print 'check_server returned %s' % check
sys.exit(not check)
运行结果：
端口在监听
[root@CentOS python]# python check_tcp_port.py -a 192.168.137.2 -p 22
options: {'port': 22, 'address': '192.168.137.2'}, args: []
Attempting to connect to 192.168.137.2 on port 22
Connected to 192.168.137.2 on port 22
check_server returned True
端口不在监听
[root@centos python]# python check_tcp_port.py -a 192.168.137.2 -p 36
options: {'port': 36, 'address': '192.168.137.2'}, args: []
Attempting to connect to 192.168.137.2 on port 36
Connection to 192.168.137.2 on port 36 failed: [Errno 111] Connection refused
check_server returned False
检测web服务
check_web.py
#!/usr/bin/env python
import socket
import re
import sys
def check_webserver(address, port, resource):
if not resource.startswith('/'):
resource = '/' + resource
request_string = "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n" %(resource, address)
print 'HTTP request:'
print '|||%s|||' % request_string
s = socket.socket()
print "Attempting to connect to %s on port %s" %(address, port)
try:
s.connect((address, port))
print "Connected to %s on port %s" %(address, port)
s.send(request_string)
rsp = s.recv(100)
print 'Received 100 bytes of HTTP response'
print '|||%s|||' % rsp
except socket.error, e:
print "Connection to %s on port %s failed: %s" %(address, port, e)
return False
finally:
print "Closing the connection"
s.close()
lines = rsp.splitlines()
print 'First line of HTTP response: %s' % lines[0]
try:
version, status, message = re.split(r'\s+', lines[0], 2)
print 'Version: %s, Stuats: %s, Message: %s' %(version, status, message)
except ValueError:
print 'Failed to split status line'
return False
if status in ['200', '301']:
print 'Success - status was %s' %status
return True
else:
print 'Staus was %s' %status
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：
正常
[root@centos python]# python check_web.py -a 192.168.137.2 -p 80 -r index.html
options: {'resource': 'index.html', 'port': 80, 'address': '192.168.137.2'}, args: []
HTTP request:
|||GET /index.html HTTP/1.1
Host: 192.168.137.2
|||
Attempting to connect to 192.168.137.2 on port 80
Connected to 192.168.137.2 on port 80
Received 100 bytes of HTTP response
|||HTTP/1.1 200 OK
Date: Wed, 19 Jun 2013 02:29:31 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: |||
Closing the connection
First line of HTTP response: HTTP/1.1 200 OK
Version: HTTP/1.1, Stuats: 200, Message: OK
Success - status was 200
check_webserver returned True
不正常，找不到页面的情况
[root@centos python]# python check_web.py -a 192.168.137.2 -p 80 -r ppp.html
options: {'resource': 'ppp.html', 'port': 80, 'address': '192.168.137.2'}, args: []
HTTP request:
|||GET /ppp.html HTTP/1.1
Host: 192.168.137.2
|||
Attempting to connect to 192.168.137.2 on port 80
Connected to 192.168.137.2 on port 80
Received 100 bytes of HTTP response
|||HTTP/1.1 404 Not Found
Date: Wed, 19 Jun 2013 02:29:41 GMT
Server: Apache/2.2.3 (CentOS)
Content-|||
Closing the connection
First line of HTTP response: HTTP/1.1 404 Not Found
Version: HTTP/1.1, Stuats: 404, Message: Not Found
Staus was 404
check_webserver returned False