#!/usr/bin/env python
#-*- coding: utf-8 -*-
import logging
import csv
import datetime
from selenium import webdriver
data=datetime.datetime.now().strftime('%Y%m%d%H%M') #获取当前的时间
filename="timing_{}.csv".format(data) #创建一个csv文件
driver = webdriver.Chrome()
driver.get('https://www.baidu.com')
driver.maximize_window()
driver.find_element_by_id('kw').send_keys('性能测试')
driver.find_element_by_id('su').click()
#前端性能监控的接口
js = 'return window.performance.timing'
#执行JS脚本
timing = driver.execute_script(js)
print(timing)
logging.info(timing)
DNS_time=timing["domainLookupEnd"]-timing["domainLookupStart"] #DNS查询耗时
TCP_time = timing["connectEnd"] - timing["connectStart"] # TCP链接耗时
Requesr_time = timing["responseEnd"] - timing["responseStart"] # request请求耗时
dom_time = timing["domComplete"] - timing["domInteractive"] # 解析dom树耗时
# 白屏时间 白屏时间指的是浏览器开始显示内容的时间。因此我们只需要知道是浏览器开始显示内容的时间点，
# 即页面白屏结束时间点即可获取到页面的白屏时间。
white_screen= timing["responseStart"] - timing["navigationStart"]
domready_time = timing["domainLookupEnd"] - timing["domainLookupStart"] # DNS查询耗时
onload_time = timing["loadEventEnd"] - timing["navigationStart"] # onload时间
with open(filename, "a+", newline='') as csvfile:
csv_write = csv.writer(csvfile)
# writerow 是一行一行写入 writerows方法是一次写入多行
csv_write.writerow(["DNS查询耗时", "TCP链接耗时", "request请求耗时", "解析dom树耗时", "白屏时间", "DNS查询耗时", "onload时间"])
csv_write.writerow([DNS_time, TCP_time, Requesr_time, dom_time,white_screen, domready_time, onload_time])
driver.quit()
