https://github.com/lana-20/selenium4-chrome-debugging

https://github.com/lana-20/selenium4-chrome-debugging

Last synced: about 2 months ago
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• Host: GitHub
• URL: https://github.com/lana-20/selenium4-chrome-debugging
• Owner: lana-20
• Created: 2022-12-30T03:14:59.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-12-30T03:23:28.000Z (almost 3 years ago)
• Last Synced: 2025-05-22T21:31:54.120Z (5 months ago)
• Size: 2.93 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# New Chrome debugging features in Selenium 4

In Selenium 4, the Chrome web browser includes several new debugging features that can be used to troubleshoot issues with Selenium scripts. Some of these features include:

1. __Performance.getMetrics()__: This method allows you to retrieve performance metrics for the Chrome web browser, such as CPU and memory usage, layout and rendering performance, and network activity.

2. __Log.getLog()__: This method allows you to retrieve the Chrome browser's log, which includes information about network requests, JavaScript errors, and other events that occur within the browser.

3. __Network.getResponseBody()__: This method allows you to retrieve the response body for a network request made by the Chrome web browser. This can be useful for debugging issues with network requests or examining the response data from an API.

4. __Debugger.getScriptSource()__: This method allows you to retrieve the source code for a JavaScript script loaded in the Chrome web browser. This can be useful for debugging issues with JavaScript code or examining the implementation of a library or framework.

To use these features in your Selenium scripts, you can use the __execute_cdp_cmd()__ method of the Chrome webdriver to send a command to the Chrome DevTools Protocol (CDP) and retrieve the resulting data. For example:

        # Import the required Selenium libraries

        from selenium import webdriver

        # Create a webdriver instance

        driver = webdriver.Chrome()

        # Navigate to a web page

        driver.get("https://www.example.com")

        # Retrieve the performance metrics for the Chrome web browser

        metrics = driver.execute_cdp_cmd("Performance.getMetrics")

        print(metrics)

        # Retrieve the Chrome browser's log

        log = driver.execute_cdp_cmd("Log.getLog")

        print(log)

        # Retrieve the response body for a network request

        response_body = driver.execute_cdp_cmd("Network.getResponseBody", {"requestId": "123456"})

        print(response_body)

        # Retrieve the source code for a JavaScript script

        script_source = driver.execute_cdp_cmd("Debugger.getScriptSource", {"scriptId": "123456"})

        print(script_source)

        # Close the webdriver instance

        driver.close()

This code will create a Chrome web browser, navigate to a web page, and use the __execute_cdp_cmd()__ method to retrieve the performance metrics, log, response body for a network request, and source code for a JavaScript script for the Chrome web browser. It will then close the webdriver instance.

The Chrome DevTools Protocol (CDP) is a set of APIs that allows you to interact with the Chrome web browser's internal debugging and inspection tools. It is used by the Chrome web browser to communicate with its own debugger, and it can also be used by external tools like Selenium to interact with the Chrome web browser.

Using the CDP, you can do things like:

- Retrieve performance metrics, log entries, and network request data from the Chrome web browser.

- Inspect and modify the DOM, CSS, and JavaScript code of a web page.

- Debug and profile JavaScript code.

- Monitor and control the Chrome web browser's network activity.

There are many other CDP commands that you can use with Selenium, depending on your needs. You can find a full list of available commands in the Chrome DevTools Protocol Viewer at https://chromedevtools.github.io/devtools-protocol/.