<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DependencyInjection;
use Symfony\Component\Config\Util\XmlUtils;
use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
/**
* @author Nicolas Grekas <p@tchwork.com>
*/
class EnvVarProcessor implements EnvVarProcessorInterface
{
private $container;
public function __construct(ContainerInterface $container)
{
$this->container = $container;
}
/**
* {@inheritdoc}
*/
public static function getProvidedTypes()
{
return [
'base64' => 'string',
'bool' => 'bool',
'const' => 'bool|int|float|string|array',
'file' => 'string',
'float' => 'float',
'int' => 'int',
'json' => 'array',
'resolve' => 'string',
'string' => 'string',
];
}
/**
* {@inheritdoc}
*/
public function getEnv($prefix, $name, \Closure $getEnv)
{
$i = strpos($name, ':');
if ('file' === $prefix) {
if (!is_scalar($file = $getEnv($name))) {
throw new RuntimeException(sprintf('Invalid file name: env var "%s" is non-scalar.', $name));
}
if (!file_exists($file)) {
throw new RuntimeException(sprintf('Env "file:%s" not found: "%s" does not exist.', $name, $file));
}
return file_get_contents($file);
}
if (false !== $i || 'string' !== $prefix) {
if (null === $env = $getEnv($name)) {
return null;
}
} elseif (isset($_ENV[$name])) {
$env = $_ENV[$name];
} elseif (isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')) {
$env = $_SERVER[$name];
} elseif (false === ($env = getenv($name)) || null === $env) { // null is a possible value because of thread safety issues
if (!$this->container->hasParameter("env($name)")) {
throw new EnvNotFoundException($name);
}
if (null === $env = $this->container->getParameter("env($name)")) {
return null;
}
}
if (!is_scalar($env)) {
throw new RuntimeException(sprintf('Non-scalar env var "%s" cannot be cast to "%s".', $name, $prefix));
}
if ('string' === $prefix) {
return (string) $env;
}
if ('bool' === $prefix) {
return (bool) self::phpize($env);
}
if ('int' === $prefix) {
if (!is_numeric($env = self::phpize($env))) {
throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to int.', $name));
}
return (int) $env;
}
if ('float' === $prefix) {
if (!is_numeric($env = self::phpize($env))) {
throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to float.', $name));
}
return (float) $env;
}
if ('const' === $prefix) {
if (!\defined($env)) {
throw new RuntimeException(sprintf('Env var "%s" maps to undefined constant "%s".', $name, $env));
}
return \constant($env);
}
if ('base64' === $prefix) {
return base64_decode($env);
}
if ('json' === $prefix) {
$env = json_decode($env, true);
if (\JSON_ERROR_NONE !== json_last_error()) {
throw new RuntimeException(sprintf('Invalid JSON in env var "%s": ', $name).json_last_error_msg());
}
if (!\is_array($env)) {
throw new RuntimeException(sprintf('Invalid JSON env var "%s": array expected, "%s" given.', $name, \gettype($env)));
}
return $env;
}
if ('resolve' === $prefix) {
return preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($name) {
if (!isset($match[1])) {
return '%';
}
$value = $this->container->getParameter($match[1]);
if (!is_scalar($value)) {
throw new RuntimeException(sprintf('Parameter "%s" found when resolving env var "%s" must be scalar, "%s" given.', $match[1], $name, \gettype($value)));
}
return $value;
}, $env);
}
throw new RuntimeException(sprintf('Unsupported env var prefix "%s".', $prefix));
}
private static function phpize($value)
{
if (!class_exists(XmlUtils::class)) {
throw new RuntimeException('The Symfony Config component is required to cast env vars to "bool", "int" or "float".');
}
return XmlUtils::phpize($value);
}
}