监控JSON有线协议日志

当你使用Chrome时,你可以直接 chromedriver 实例,该实例将驱动Chrome记录比通过 logging 包裹这些信息包括发送到浏览器的命令及其得到的响应。下面是一个示例:

from selenium import webdriver

driver = webdriver.Chrome(service_log_path="/tmp/log")
driver.get("http://www.google.com")
driver.find_element_by_css_selector("input")
driver.quit()

上面的代码将日志输出到 /tmp/log 。日志中与 find_element_... 通话内容如下:

[2.389][INFO]: COMMAND FindElement {
   "sessionId": "b6707ee92a3261e1dc33a53514490663",
   "using": "css selector",
   "value": "input"
}
[2.389][INFO]: Waiting for pending navigations...
[2.389][INFO]: Done waiting for pending navigations
[2.398][INFO]: Waiting for pending navigations...
[2.398][INFO]: Done waiting for pending navigations
[2.398][INFO]: RESPONSE FindElement {
   "ELEMENT": "0.3367185448296368-1"
}

据我所知,命令和响应忠实地代表了客户端和服务器之间发生的事情。根据我在这些日志中看到的内容,我已经向Selenium项目提交了错误报告和修复。

找到了一个几乎符合我需求的选项。

只需将记录仪连接到 stdout 允许查看正在进行的基本请求:

import logging
import sys

from selenium import webdriver


# pipe logs to stdout
logger = logging.getLogger()
logger.addHandler(logging.StreamHandler(sys.stdout))
logger.setLevel(logging.NOTSET)

# selenium specific code
driver = webdriver.Chrome()
driver.get('http://google.com')

driver.close()

它打印:

POST http://127.0.0.1:56668/session {"desiredCapabilities": {"platform": "ANY", "browserName": "chrome", "version": "", "javascriptEnabled": true, "chromeOptions": {"args": [], "extensions": []}}}
Finished Request
POST http://127.0.0.1:56668/session/5b6875595143b0b9993ed4f66f1f19fc/url {"url": "http://google.com", "sessionId": "5b6875595143b0b9993ed4f66f1f19fc"}
Finished Request
DELETE http://127.0.0.1:56668/session/5b6875595143b0b9993ed4f66f1f19fc/window {"sessionId": "5b6875595143b0b9993ed4f66f1f19fc"}
Finished Request

我没有看到回应,但这已经是一个进步。