Selenium and BrowserMob Proxy

最新推荐文章于 2025-05-24 08:15:00 发布

franktan2010

最新推荐文章于 2025-05-24 08:15:00 发布

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本文介绍如何使用BrowserMob Proxy与Selenium配合来捕获浏览器的性能数据。BrowserMob Proxy可以收集web应用程序的性能数据并通过HAR格式输出，便于进行页面加载性能等分析。文章还提供了使用Python实现的具体步骤。

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http://assertselenium.com/2012/11/02/performance-data-collection-using-browsermob-proxy-and-selenium/

BrowserMob Proxy with Selenium

BrowserMob Proxy is a simple utility that makes it easy to capture performance data from browsers, typically written using automation toolkits such as Selenium and Watir.

BrowserMob Proxy can capture performance data for web apps (via the HAR format). Used to collect the performance data from the client side.

What is a HAR format ?

HAR(HTTP Archive) is a online tool visualizing. HAR is produced by the HTTP tracking tools, these files captures the details of the client/server communication and this can be used for analysis like Page Load Performance.

How the HAR files will look ?

proxy is programmatically controlled via a REST interface or by being embedded directly inside Java-based programs and unit tests.It can control HTTP trafic for,

blacklisting and whitelisting certain URL patterns
simulating various bandwidth and latency
remapping DNS lookups
flushing DNS caching
controlling DNS and request timeouts
automatic BASIC authorization

How to Use BrowserMob Proxy?
Step 1: Download the BrowserMob Proxy

Step 2: Note Down the path of `browsermob-proxy.bat`for Windows in the bin directory

Step 3: Programming

The Python Implementation

from browsermobproxy import Server
                server = Server("C://browsermob-proxy.bat")
                server.start()
                proxy = server.create_proxy()

                from selenium import webdriver
                profile  = webdriver.FirefoxProfile()
                profile.set_proxy(proxy.selenium_proxy())
                driver = webdriver.Firefox(firefox_profile=profile)

                proxy.new_har("google")
                driver.get("http://www.google.co.uk")
                proxy.har # returns a HAR JSON bl     



		har = proxy.har 
		file_object = open("C:\\test_baidu.har", "w")
		file_object.write(str(har))	#dict object to string object
		file_object.close()

		server.stop()
		driver.quit()