python3 基于zabbix 自动抓取监控图片

开发环境：操作系统：Ubuntu 16.04 LTS

　　　　　python版本：python3.6.3

以下是代码分析：

# _*_coding:utf-8_*_
import sys, os
import datetime,time
import http.cookiejar as cookielib
import urllib.request
import urllib.error
import urllib.parse
import logging
from oms.settings import ZABBIX_HOST,ZABBIX_USER,ZABBIX_PASS,ZABBIX_GRAPH_DIR   #导入配置信息

logger=logging.getLogger(__name__)
if "http" in ZABBIX_HOST:
    graphurl = "{0}/chart2.php".format(ZABBIX_HOST)
    loginurl = "{0}/index.php".format(ZABBIX_HOST)
else:
    graphurl = "http://{0}/chart2.php".format(ZABBIX_HOST)
    loginurl = "http://{0}/index.php".format(ZABBIX_HOST)

class ZabbixGraph(object):
    def __init__(self):
        self.graphurl = graphurl
        self.loginurl = loginurl
        self.name = ZABBIX_USER
        self.password = ZABBIX_PASS
        self.baseDir = ZABBIX_GRAPH_DIR
        #self.baseDir = "media/reports/graphs/"
        # 初始化时生成cookies
        cookiejar = cookielib.CookieJar()
        urlOpener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cookiejar))
        values = {"name":self.name, 'password':self.password, 'autologin':1, "enter":'Sign in'}
        data = urllib.parse.urlencode(values).encode(encoding='UTF8')
        request = urllib.request.Request(self.loginurl, data)
        try:
            urlOpener.open(request,timeout=10)
            self.urlOpener = urlOpener
        except urllib.error.HTTPError as e:
            print(e)
    def get(self, graphid,
                  begin_date,
                  end_date,
                  imgsDir,
                  width=800,
                  height=200):
        if graphid == 0:
            print("graphid error")
            sys.exit(1)
        stime=end_date.strftime('%Y%m%d000000')
        period=int(time.mktime(end_date.timetuple())-time.mktime(begin_date.timetuple()))
        logger.debug("period %s" %period)
        logger.debug("stime %s" %stime)
        values = {
                  "graphid":graphid,
                  "period":period,
                  "stime":stime,
                  "width":width,
                  "height":height}
        data = urllib.parse.urlencode(values).encode(encoding='UTF8')
        request = urllib.request.Request(self.graphurl, data)
        url = self.urlOpener.open(request)
        image = url.read()
        if not os.path.exists(self.baseDir + imgsDir):
            os.makedirs(self.baseDir + imgsDir)
        imgName = "%s%s%s.png" % (self.baseDir, imgsDir, str(graphid))
        if os.path.exists(imgName):
            pass
        else:
            f = open(imgName, 'wb')
            f.write(image)
            f.flush()
            f.close
        return imgName