selenium:结合httpwatch进行网页测试（Python版）

【概述】

Httpwatch 一款强大的网页数据分析工具。它可以捕捉http/https数据，查看底层的数据，包括headers、cookies、cache等。同时，记录发送请求、接收请的时间。Anyway，a good tool for you。
或许，你有一个需求，要在selenium进行页面功能测试的时候，你需要获取一些信息，如提交请求数据、接收请求数据、页面加载的时间等。selenium + httpwatch，将是一个不错的解决方案。本文主要介绍，将httpwatch附加到selenium webdriver的方法。

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注意：
有关httpwatch的使用，请自行查看API文档：
http://apihelp.httpwatch.com/#Automation%20Overview.html

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【selenium + httpwatch】

官方做法（JAVA版）：

IWebDriver driver = ; // Don't use new FirefoxDriver()

// Set a unique initial page title so that HttpWatch can attach to it
string uniqueTitle = Guid.NewGuid().ToString();
IJavaScriptExecutor js = driver as IJavaScriptExecutor;
js.ExecuteScript("document.title = '" + uniqueTitle + "';");

// Attach HttpWatch to the instance of the browser created through Selenium
Plugin plugin = control.AttachByTitle(uniqueTitle);

我就照模照样的写个Python版的

control = win32com.client.Dispatch('HttpWatch.Controller')
#driver=webdriver.Ie(executable_path="D:\\software\\IEDriverServer_Win32_2.28.0\\IEDriverServer.exe")
profile = webdriver.FirefoxProfile(r'C:\Users\X230\AppData\Roaming\Mozilla\Firefox\Profiles\68zb9g9a.default')
driver=webdriver.Firefox(firefox_profile=profile)
uniqueTitle = str(uuid.uuid4())
driver.get(url)
driver.execute_script('document.title = "' + uniqueTitle + '";') 

plugin = control.AttachByTitle(uniqueTitle)
plugin.Log.EnableFilter(False)
plugin.Record()
#plugin.GotoURL(url)
plugin.Stop()

请留意官方版的第一句话（如下）。意思是，（如果使用Firefox）请不要使用默认的profile配置，需要使用Firefox本地profile配置。

IWebDriver driver = < Create Selenium Driver using existing profile >; // Don’t use new FirefoxDriver()

selenium Firefox 默认配置文件是webdriver_prefs.json，默认不加载所有的插件（add-ons）。所以，如果你忽略第一句，将发生以下报错：

    plugin = self._control.AttachByTitle(uniqueTitle)
  File "", line 2, in AttachByTitle
pywintypes.com_error: (-2147352567, '\xb7\xa2\xc9\xfa\xd2\xe2\xcd\xe2\xa1\xa3', (0, u'HttpWatch.Controller', u"AttachByTitle failed because no IE or Firefox page was found with the title 'd9f5f540-3227-4d8a-b928-daaf196e256b'. \r\n\r\nPlease check that HttpWatch is installed, enabled and working correctly in the target browser window. Also if you are using Selenium and Firefox make sure that you are using a copy of a profile that has HttpWatch enabled rather than a fresh profile created by 'new FirefoxDriver()'. For more information please refer to the Selenium/Firefox sample described in the HttpWatch Automation help - AttachByTitle failed", None, 0, -2147467259), None)

那Firefox本地profile文件在哪，请查阅Firefox官方帮助：

https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

然后，如下初始化driver即可：

driver=webdriver.Firefox(firefox_profile=profile)