How to set up panther crawler with docker - docker

Question

Dockerfile:
# https://github.com/symfony/panther#docker-integration
FROM php:latest
RUN apt-get update && apt-get install -y libzip-dev zlib1g-dev chromium && docker-php-ext-install zip
ENV PANTHER_NO_SANDBOX 1
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
docker-compose.yml:
version: "3"
services:
crawler:
build: .
working_dir: /usr/src
volumes:
- .:/usr/src
command: /bin/sh -c "/usr/local/bin/composer install && php index.php"
composer.json:
{
"require": {
"symfony/panther": "^0.6.0"
}
}
index.php:
<?php
// https://github.com/symfony/panther#basic-usage
require __DIR__.'/vendor/autoload.php'; // Composer's autoloader
$client = \Symfony\Component\Panther\Client::createChromeClient();
$client->request('GET', 'https://api-platform.com'); // Yes, this website is 100% written in JavaScript
$client->clickLink('Support');
// Wait for an element to be rendered
$crawler = $client->waitFor('.support');
echo $crawler->filter('.support')->text();
$client->takeScreenshot('screen.png'); // Yeah, screenshot!
All files are in the same location. I run docker-compose build && docker-compose up and I'm getting following error:
crawler_1 | Fatal error: Uncaught RuntimeException: Could not start chrome (or it crashed) after 30 seconds. in /usr/src/vendor/symfony/panther/src/ProcessManager/WebServerReadinessProbeTrait.php:51
This is similar to https://github.com/symfony/panther/issues/200, however in my case I'm not using panther for tests, but only to scrape, and I really don't know how to fix this. I think my problem might be related to invalid docker / docker-compose files.

Answer 1

I had the same error. My solution was install unzip as it says in the readme:
"Warning: On *nix systems, the unzip command must be installed or you
will encounter an error similar to RuntimeException: sh: 1: exec:
/app/vendor/symfony/panther/src/ProcessManager/../../chromedriver-bin/chromedriver_linux64:
Permission denied (or chromedriver_linux64: not found). The underlying
reason is that PHP's ZipArchive doesn't preserve UNIX executable
permissions."
and finally, reinstall the panther library.