Cannot yet tell if frame is final

[svb91]

Hi,

unfortunately I have some problems running your code (sometimes). I already tried to run the browser in non-headless-mode where I see, that the browser is running. Then I received a ton of exceptions until the 5s timeout. I have days where I can run the same code without any problem and - like today - it will not work regardless what I do.

How can I fix this error?

Exceptions during runtime (before the 5s timeout):

Cannot yet tell if frame is final
Cannot yet tell expected length
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot yet tell if frame is final
Cannot yet tell expected length
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot yet tell if frame is final
Cannot yet tell expected length
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot get extended length: need more data
Cannot yet tell if frame is final
Cannot yet tell expected length

Error Output:

Fatal error: Uncaught HeadlessChromium\Exception\OperationTimedOut: Operation timed out after 5s. in \composer\vendor\chrome-php\chrome\src\Exception\OperationTimedOut.php:18 Stack trace:
#0 \composer\vendor\chrome-php\chrome\src\Utils.php(67): HeadlessChromium\Exception\OperationTimedOut::createFromTimeout()
#1 \composer\vendor\chrome-php\chrome\src\Communication\ResponseReader.php(115): HeadlessChromium\Utils::tryWithTimeout()
#2 \composer\vendor\chrome-php\chrome\src\Communication\Connection.php(270): HeadlessChromium\Communication\ResponseReader->waitForResponse()
#3 \composer\vendor\chrome-php\chrome\src\Browser.php(84): HeadlessChromium\Communication\Connection->sendMessageSync()
#4 \composer\vendor\chrome-php\chrome\src\Browser\ProcessAwareBrowser.php(26): HeadlessChromium\Browser->__construct()
#5 \composer\vendor\chrome-php\chrome\src\Browser\BrowserProcess.php(162): HeadlessChromium\Browser\ProcessAwareBrowser->__construct()
#6 \composer\vendor\chrome-php\chrome\src\BrowserFactory.php(81): HeadlessChromium\Browser\BrowserProcess->start()
#7 \php\classes\main\main\screenshot.class.php(39): HeadlessChromium\BrowserFactory->createBrowser()
#8 \index.php(52): screenshot::createScreenshot()
#9 C:_Private Data - NO BACKUP\Source\web_template\index.php(238): include('...') #10 {main} thrown in \composer\vendor\chrome-php\chrome\src\Exception\OperationTimedOut.php on line 18

Fatal error: Uncaught Error: Call to a member function sendCloseMessage() on null in \composer\vendor\chrome-php\chrome\src\Browser\BrowserProcess.php:210 Stack trace:
#0 [internal function]: HeadlessChromium\Browser\BrowserProcess->kill() #1 {main} thrown in \composer\vendor\chrome-php\chrome\src\Browser\BrowserProcess.php on line 210

Chrome Log:

[2022-07-18T09:01:02.471511+02:00] chrome.DEBUG: process: initializing [] []
[2022-07-18T09:01:02.477975+02:00] chrome.DEBUG: process: using directory: C:\Users\vanboxemsi\AppData\Local\Temp\chr26D9.tmp [] []
[2022-07-18T09:01:02.484123+02:00] chrome.DEBUG: process: starting process: "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=0 --disable-background-networking --disable-background-timer-throttling --disable-client-side-phishing-detection --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --disable-translate --disable-features=ChromeWhatsNewUI --metrics-recording-only --no-first-run --safebrowsing-disable-auto-update --enable-automation --password-store=basic --use-mock-keychain --headless --disable-gpu --font-render-hinting=none --hide-scrollbars --mute-audio --window-size=1920,1080 --user-data-dir=C:\Users\vanboxemsi\AppData\Local\Temp\chr26D9.tmp [] []
[2022-07-18T09:01:02.503449+02:00] chrome.DEBUG: process: waiting for 30 seconds for startup [] []
[2022-07-18T09:01:02.984082+02:00] chrome.DEBUG: process: chrome output:DevTools listening on ws://127.0.0.1:54291/devtools/browser/dac28e17-7831-490d-8022-5d3e96d516e7 [] []
[2022-07-18T09:01:02.984441+02:00] chrome.DEBUG: process: ✓ accepted output [] []
[2022-07-18T09:01:02.984781+02:00] chrome.DEBUG: process: connecting using ws://127.0.0.1:54291/devtools/browser/dac28e17-7831-490d-8022-5d3e96d516e7 [] []
[2022-07-18T09:01:03.001490+02:00] chrome.DEBUG: socket(1): connecting [] []
[2022-07-18T09:01:03.005447+02:00] chrome.DEBUG: socket(1): ✓ connected [] []
[2022-07-18T09:01:03.008457+02:00] chrome.DEBUG: socket(1): → sending data:{"id":1,"method":"Target.setDiscoverTargets","params":{"discover":true}} [] []
[2022-07-18T09:01:10.021920+02:00] chrome.DEBUG: socket(1): ← receiving data:{"method":"Target.targetCreated","params":{"targetInfo":{"targetId":"0180368f-8317-4220-b781-c25ae8d54c80","type":"browser","title":"","url":"","attached":true,"canAccessOpener":false}}} [] []
[2022-07-18T09:01:10.022309+02:00] chrome.DEBUG: socket(1): ← receiving data:{"method":"Target.targetCreated","params":{"targetInfo":{"targetId":"2cb9652a-f99d-4604-ba4f-8b237e191d0e","type":"browser","title":"","url":"","attached":false,"canAccessOpener":false}}} [] []
[2022-07-18T09:01:10.022638+02:00] chrome.DEBUG: socket(1): ← receiving data:{"method":"Target.targetCreated","params":{"targetInfo":{"targetId":"3A2C028723376A2165D985B844E5133E","type":"page","title":"","url":"about:blank","attached":false,"canAccessOpener":false,"browserContextId":"9D37FF0DE883F6D12504250B5681FAC9"}}} [] []
[2022-07-18T09:01:10.023208+02:00] chrome.DEBUG: socket(1): ← receiving data:{"id":1,"result":{}} [] []
[2022-07-18T09:01:10.023476+02:00] chrome.DEBUG: connection: ⇶ dispatching method:Target.targetCreated [] []
[2022-07-18T09:01:10.933292+02:00] chrome.DEBUG: process: killing chrome [] []
[2022-07-18T09:01:10.933574+02:00] chrome.DEBUG: process: trying to close chrome gracefully [] []

[enricodias]

To verify if it's a problem with the library, we need to be able to reproduce the problem at our end. Your logs just shows a normal timeout, meaning that the chrome process didn't reply fast enough. Can you provide a sample code that leads to the errors you mentioned?

[svb91]

Sure. I've created a custom wrapper for your tool. The strange thing is, that the exact same code sometimes worked 20x and right now it does not work. I already tried to change timeouts but the exceptions will be thrown after a few seconds (bellow the timeout limit)

In my Index i run the following code:

screenshot::createScreenshot("https://github.com/chrome-php/chrome", "test.jpg");
First parameter is the URL and the second the output file.

Relevant code of the function (The code does not reach the try-block):

// starts headless chrome
$o_browserFactory	= new BrowserFactory();
$o_browser		= $o_browserFactory->createBrowser([	'windowSize' => [1920, 1080],
								'noSandbox' => true]);




// Perform Request
try
{
	// Navigate to page
	$o_page = $o_browser->createPage();
	$o_page->navigate($s_url)->waitForNavigation();




	// Screenshot Settings
	$S_screenshotData = array(	"format" => "jpeg"
					"quality" => $i_quality);



	// Take Screenshot
	$o_screenshot = $o_page -> screenshot($S_screenshotData);




	// Save to File
	$o_screenshot->saveToFile($s_destination);
}
catch(Exception $e)
{
	// Return Error
        return false;
}

// Return OK
return true;

[enricodias]

Are you executing this code in parallel? Can you test it using the version 1.4?

[svb91]

I tested all versions and the same error occurred beginning with version 0.10.0.
In version 0.9.0 the error changed to:

Fatal error: Uncaught RuntimeException: Chrome process stopped before startup completed. Additional info: Der Befehl "chrome" ist entweder falsch geschrieben oder konnte nicht gefunden werden.

And I don't run the code in parallel.

The interesting part is, that I don't have the feeling of changing any setting in chrome (not my default browser, so it is only used by your script) but sometimes it worked without any problem...

[enricodias]

When you execute in non-headless-mode, does the browser remains alive after the error? I'm thinking that something else may be killing your chrome process.

[svb91]

The browser remains open for the full 5s till the timeout.
Than it will be closed by your script.
There shouldnt be any other processes killing chrome.

Is it maybe an anti-virus-related issue? This script is running on a company device and we use MS Defender

[horror]

same issue. browser version 103.0.5060.134-1. package 1.6.1

[enricodias]

I executed this exact code and couldn't reproduce the error:

include 'vendor/autoload.php';

use HeadlessChromium\BrowserFactory;

$s_url = 'https://github.com/chrome-php/chrome';
$i_quality = 90;
$s_destination = 'test.jpg';

$o_browserFactory = new BrowserFactory();
$o_browser = $o_browserFactory->createBrowser([
    'windowSize' => [1920, 1080],
    'noSandbox' => true,
]);

try {
    $o_page = $o_browser->createPage();
    $o_page->navigate($s_url)->waitForNavigation();

    $o_screenshot = $o_page->screenshot([
        'format' => 'jpeg',
        'quality' => $i_quality,
    ]);

    $o_screenshot->saveToFile($s_destination);
} catch (Exception $e) {
    // Return Error
}

It's probably something related to your specific setup. The fatal error when calling sendCloseMessage() is caused by the $browser property in the BrowserProcess::class being null, but there is nothing in this lib that sets it to null. The only way to see whats happening is to reproduce the error and follow the code execution step by step with xdebug.

[stale]

This issue has been automatically marked as stale because there has been no recent activity. It will be closed after 30 days if no further activity occurs. Thank you for your contributions.