Troubleshooting of selenium errors: Difference between revisions
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[https://www.selenium.dev/ SeleniumHQ Browser Automation] ([https://github.com/php-webdriver/php-webdriver php-webdriver/php-webdriver: PHP client for Selenium/WebDriver protocol. Previously facebook/php-webdriver]) | [https://www.selenium.dev/ SeleniumHQ Browser Automation] ([https://github.com/php-webdriver/php-webdriver php-webdriver/php-webdriver: PHP client for Selenium/WebDriver protocol. Previously facebook/php-webdriver]) | ||
== How to | == How to resolbe the selenium errors == | ||
* Checking the standalone selenium server is running or not {{kbd | key=<nowiki>ps aux | grep selenium</nowiki>}} on {{Linux}} | * Checking the standalone selenium server is running or not {{kbd | key=<nowiki>ps aux | grep selenium</nowiki>}} on {{Linux}} | ||
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* Checking the error log file of HTTP server e.g. {{kbd | key=<nowiki>sudo tail /var/log/nginx/error.log</nowiki>}} | * Checking the error log file of HTTP server e.g. {{kbd | key=<nowiki>sudo tail /var/log/nginx/error.log</nowiki>}} | ||
* (optional) Checking the error log file of PHP-FPM e.g. {{kbd | key=<nowiki>sudo tail /var/log/www.access.log</nowiki>}} which its file path defined in the configuration file {{kbd | key=<nowiki>/etc/php-fpm.d/www.conf</nowiki>}} | * (optional) Checking the error log file of PHP-FPM e.g. {{kbd | key=<nowiki>sudo tail /var/log/www.access.log</nowiki>}} which its file path defined in the configuration file {{kbd | key=<nowiki>/etc/php-fpm.d/www.conf</nowiki>}} | ||
* (optional) Checking the keyboard event e.g. CTRL works on {{Win}} but not works on {{Mac}}<ref>[https://stackoverflow.com/questions/30937153/selenium-send-keys-what-element-should-i-use python - Selenium - send keys - what element should I use - Stack Overflow]</ref> | |||
== How to resolve Uncaught Facebook\WebDriver\Exception\InvalidSelectorException == | == How to resolve Uncaught Facebook\WebDriver\Exception\InvalidSelectorException == | ||
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* [https://chromedriver.chromium.org/downloads Download] the same version of ChromeDriver with the version installed on the computer or server | * [https://chromedriver.chromium.org/downloads Download] the same version of ChromeDriver with the version installed on the computer or server | ||
* You may need to stop the ChromeDriver in the process list if you could not overwrite the existing ChromeDriver file | * You may need to stop the ChromeDriver in the process list if you could not overwrite the existing ChromeDriver file | ||
** {{Win}} (1) | ** {{Win}} (1) Open the command prompt with the administrative permission (2) and keyin {{kbd | key=<nowiki>taskkill /IM "chromedriver.exe" /F</nowiki>}} to stop the ChromeDriver process | ||
** {{Linux}} | ** {{Linux}} | ||
* Overwrite the existing ChromeDriver file | * Overwrite the existing ChromeDriver file | ||
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{{Template:Troubleshooting}} | {{Template:Troubleshooting}} | ||
[[Category:Web scraping]] |
Latest revision as of 22:37, 10 October 2022
SeleniumHQ Browser Automation (php-webdriver/php-webdriver: PHP client for Selenium/WebDriver protocol. Previously facebook/php-webdriver)
How to resolbe the selenium errors[edit]
- Checking the standalone selenium server is running or not ps aux | grep selenium on Linux
- Checking the log file of standalone selenium server e.g. launching the server by the command sudo nohup java -jar selenium-server-standalone-3.141.59.jar > /home/user/selenium.log 2>&1 &. The log file was located at /home/user/selenium.log
- (optional) Checking the port where the selenium server is running e.g. wget http://localhost:4444
- Checking the error log file of HTTP server e.g. sudo tail /var/log/nginx/error.log
- (optional) Checking the error log file of PHP-FPM e.g. sudo tail /var/log/www.access.log which its file path defined in the configuration file /etc/php-fpm.d/www.conf
- (optional) Checking the keyboard event e.g. CTRL works on Win but not works on Mac [1]
How to resolve Uncaught Facebook\WebDriver\Exception\InvalidSelectorException[edit]
Error message
PHP Fatal error: Uncaught Facebook\WebDriver\Exception\InvalidSelectorException: invalid selector: The result of the xpath expression "xxx" is: [object Attr]. It should be an element. (Session info: chrome=83.0.4103.61) in /path/to/vendor/php-webdriver/webdriver/lib/Exception/WebDriverException.php:105
Situation
- After the term was keyed in into the text box, the script shuld auto click the specified button which specified by XPath expression.
Possibile soultions
- Solution1: Using headless chrome[2]
- Solution2: Not click the button which specified by XPath expression. Send the ENTER to submit the form[3].
How to resolve [WARNING]: This version of ChromeDriver only supports Chrome version xx or [WARNING]: This version of ChromeDriver has not been tested with Chrome version 86[edit]
Situation
- Download the same version of ChromeDriver with the version installed on the computer or server
- You may need to stop the ChromeDriver in the process list if you could not overwrite the existing ChromeDriver file
- Overwrite the existing ChromeDriver file
References[edit]
Troubleshooting of ...
- PHP, cUrl, Python, selenium, HTTP status code errors
- Database: SQL syntax debug, MySQL errors, MySQLTuner errors or PostgreSQL errors
- HTML/Javascript: Troubleshooting of javascript, XPath
- Software: Mediawiki, Docker, FTP problems, online conference software
- Test connectivity for the web service, Web Ping, Network problem, Web user behavior, Web scrape troubleshooting
Template