Allow executing of custom webdriver commands

[matej-pavla]

What are you trying to achieve? (Expected behavior)

To execute chromedriver's Page.setDownloadBehavior to allow downloading of files when using chrome in --headless mode. More generally to allow executing of custom webdriver commands.

More about the chromedriver issue here: https://bugs.chromium.org/p/chromedriver/issues/detail?id=2454 Basically, to be able to download files in headless chrome, one needs to execute command to url /session/:sessionId/chromium/send_command with following params:

$params = array(
        'cmd' => 'Page.setDownloadBehavior',
        'params' => array(
                "behavior" => 'allow',
                "downloadPath" => DOWNLOADS_PATH,
        ),
);

Using existing webdriver's functionality it's not possible, since HttpCommandExecutor's execute which seem to contain the logic for sending the request only works with the pre-defined commands from the $commands array and /session/:sessionId/chromium/send_command is just not one of them.

To solve this problem it would be nice to add some method or a way to easily extend HttpCommandExecutor to handle custom commands and then be able to use it with RemoteWebDriver.

What do you get instead? (Actual behavior)

I am not able to currently execute such command via php-webdriver.

Details

• Php-webdriver version: 1.6
• PHP version: 7.1
• Selenium server version: 3.14
• Operating system: Mac
• Browser used + version: Chrome

[era404design]

Sorry, was there a resolution for this? I haven't been able to perform a successful download headlessly, whereas all downloads performed non-headlessly are successful. Thanks in advance.

[OndraM]

Custom commands were merged in #738 and will be part of 1.8.0 - so it may already by possible to achieve this via custom command.
Furthermore there is also PR #556 for DevTools commands which will make this even more convenient in future.