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