File "EnvVarProcessor.php"
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<?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\DependencyInjection\Exception\EnvNotFoundException;
use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
/**
* @author Nicolas Grekas <p@tchwork.com>
*/
class EnvVarProcessor implements EnvVarProcessorInterface
{
private $container;
private $loaders;
private $loadedVars = [];
/**
* @param EnvVarLoaderInterface[] $loaders
*/
public function __construct(ContainerInterface $container, \Traversable $loaders = null)
{
$this->container = $container;
$this->loaders = $loaders ?? new \ArrayIterator();
}
/**
* {@inheritdoc}
*/
public static function getProvidedTypes()
{
return [
'base64' => 'string',
'bool' => 'bool',
'not' => 'bool',
'const' => 'bool|int|float|string|array',
'csv' => 'array',
'file' => 'string',
'float' => 'float',
'int' => 'int',
'json' => 'array',
'key' => 'bool|int|float|string|array',
'url' => 'array',
'query_string' => 'array',
'resolve' => 'string',
'default' => 'bool|int|float|string|array',
'string' => 'string',
'trim' => 'string',
'require' => 'bool|int|float|string|array',
];
}
/**
* {@inheritdoc}
*/
public function getEnv(string $prefix, string $name, \Closure $getEnv)
{
$i = strpos($name, ':');
if ('key' === $prefix) {
if (false === $i) {
throw new RuntimeException(sprintf('Invalid env "key:%s": a key specifier should be provided.', $name));
}
$next = substr($name, $i + 1);
$key = substr($name, 0, $i);
$array = $getEnv($next);
if (!\is_array($array)) {
throw new RuntimeException(sprintf('Resolved value of "%s" did not result in an array value.', $next));
}
if (!isset($array[$key]) && !\array_key_exists($key, $array)) {
throw new EnvNotFoundException(sprintf('Key "%s" not found in %s (resolved from "%s").', $key, json_encode($array), $next));
}
return $array[$key];
}
if ('default' === $prefix) {
if (false === $i) {
throw new RuntimeException(sprintf('Invalid env "default:%s": a fallback parameter should be provided.', $name));
}
$next = substr($name, $i + 1);
$default = substr($name, 0, $i);
if ('' !== $default && !$this->container->hasParameter($default)) {
throw new RuntimeException(sprintf('Invalid env fallback in "default:%s": parameter "%s" not found.', $name, $default));
}
try {
$env = $getEnv($next);
if ('' !== $env && null !== $env) {
return $env;
}
} catch (EnvNotFoundException $e) {
// no-op
}
return '' === $default ? null : $this->container->getParameter($default);
}
if ('file' === $prefix || 'require' === $prefix) {
if (!\is_scalar($file = $getEnv($name))) {
throw new RuntimeException(sprintf('Invalid file name: env var "%s" is non-scalar.', $name));
}
if (!is_file($file)) {
throw new EnvNotFoundException(sprintf('File "%s" not found (resolved from "%s").', $file, $name));
}
if ('file' === $prefix) {
return file_get_contents($file);
} else {
return require $file;
}
}
if (false !== $i || 'string' !== $prefix) {
$env = $getEnv($name);
} elseif (isset($_ENV[$name])) {
$env = $_ENV[$name];
} elseif (isset($_SERVER[$name]) && !str_starts_with($name, 'HTTP_')) {
$env = $_SERVER[$name];
} elseif (false === ($env = getenv($name)) || null === $env) { // null is a possible value because of thread safety issues
foreach ($this->loadedVars as $vars) {
if (false !== $env = ($vars[$name] ?? false)) {
break;
}
}
if (false === $env || null === $env) {
$loaders = $this->loaders;
$this->loaders = new \ArrayIterator();
try {
$i = 0;
$ended = true;
$count = $loaders instanceof \Countable ? $loaders->count() : 0;
foreach ($loaders as $loader) {
if (\count($this->loadedVars) > $i++) {
continue;
}
$this->loadedVars[] = $vars = $loader->loadEnvVars();
if (false !== $env = $vars[$name] ?? false) {
$ended = false;
break;
}
}
if ($ended || $count === $i) {
$loaders = $this->loaders;
}
} catch (ParameterCircularReferenceException $e) {
// skip loaders that need an env var that is not defined
} finally {
$this->loaders = $loaders;
}
}
if (false === $env || null === $env) {
if (!$this->container->hasParameter("env($name)")) {
throw new EnvNotFoundException(sprintf('Environment variable not found: "%s".', $name));
}
$env = $this->container->getParameter("env($name)");
}
}
if (null === $env) {
if (!isset($this->getProvidedTypes()[$prefix])) {
throw new RuntimeException(sprintf('Unsupported env var prefix "%s".', $prefix));
}
return null;
}
if (!\is_scalar($env)) {
throw new RuntimeException(sprintf('Non-scalar env var "%s" cannot be cast to "%s".', $name, $prefix));
}
if ('string' === $prefix) {
return (string) $env;
}
if (\in_array($prefix, ['bool', 'not'], true)) {
$env = (bool) (filter_var($env, \FILTER_VALIDATE_BOOLEAN) ?: filter_var($env, \FILTER_VALIDATE_INT) ?: filter_var($env, \FILTER_VALIDATE_FLOAT));
return 'not' === $prefix ? !$env : $env;
}
if ('int' === $prefix) {
if (false === $env = filter_var($env, \FILTER_VALIDATE_INT) ?: filter_var($env, \FILTER_VALIDATE_FLOAT)) {
throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to int.', $name));
}
return (int) $env;
}
if ('float' === $prefix) {
if (false === $env = filter_var($env, \FILTER_VALIDATE_FLOAT)) {
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' === $prefix) {
return base64_decode(strtr($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 (null !== $env && !\is_array($env)) {
throw new RuntimeException(sprintf('Invalid JSON env var "%s": array or null expected, "%s" given.', $name, get_debug_type($env)));
}
return $env;
}
if ('url' === $prefix) {
$parsedEnv = parse_url($env);
if (false === $parsedEnv) {
throw new RuntimeException(sprintf('Invalid URL in env var "%s".', $name));
}
if (!isset($parsedEnv['scheme'], $parsedEnv['host'])) {
throw new RuntimeException(sprintf('Invalid URL env var "%s": schema and host expected, "%s" given.', $name, $env));
}
$parsedEnv += [
'port' => null,
'user' => null,
'pass' => null,
'path' => null,
'query' => null,
'fragment' => null,
];
// remove the '/' separator
$parsedEnv['path'] = '/' === ($parsedEnv['path'] ?? '/') ? '' : substr($parsedEnv['path'], 1);
return $parsedEnv;
}
if ('query_string' === $prefix) {
$queryString = parse_url($env, \PHP_URL_QUERY) ?: $env;
parse_str($queryString, $result);
return $result;
}
if ('resolve' === $prefix) {
return preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($name, $getEnv) {
if (!isset($match[1])) {
return '%';
}
if (str_starts_with($match[1], 'env(') && str_ends_with($match[1], ')') && 'env()' !== $match[1]) {
$value = $getEnv(substr($match[1], 4, -1));
} else {
$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], $name, get_debug_type($value)));
}
return $value;
}, $env);
}
if ('csv' === $prefix) {
return str_getcsv($env, ',', '"', \PHP_VERSION_ID >= 70400 ? '' : '\\');
}
if ('trim' === $prefix) {
return trim($env);
}
throw new RuntimeException(sprintf('Unsupported env var prefix "%s" for env name "%s".', $prefix, $name));
}
}