S3/Minio storage controller Support

storage-controllers/s3/Aws/S3/UseArnRegion/ConfigurationProvider.php

@@ -0,0 +1,101 @@
+<?php
+namespace Aws\S3\UseArnRegion;
+
+use Aws\AbstractConfigurationProvider;
+use Aws\CacheInterface;
+use Aws\ConfigurationProviderInterface;
+use Aws\S3\UseArnRegion\Exception\ConfigurationException;
+use GuzzleHttp\Promise;
+
+class ConfigurationProvider extends AbstractConfigurationProvider
+    implements ConfigurationProviderInterface
+{
+    const ENV_USE_ARN_REGION = 'AWS_S3_USE_ARN_REGION';
+    const INI_USE_ARN_REGION = 's3_use_arn_region';
+    const DEFAULT_USE_ARN_REGION = false;
+
+    public static $cacheKey = 'aws_s3_use_arn_region_config';
+
+    protected static $interfaceClass = ConfigurationInterface::class;
+    protected static $exceptionClass = ConfigurationException::class;
+
+    public static function defaultProvider(array $config = [])
+    {
+        $configProviders = [
+            self::env(),
+            self::ini(),
+            self::fallback()
+        ];
+
+        $memo = self::memoize(
+            call_user_func_array('self::chain', $configProviders)
+        );
+
+        if (isset($config['use_arn_region'])
+            && $config['use_arn_region'] instanceof CacheInterface
+        ) {
+            return self::cache($memo, $config['use_arn_region'], self::$cacheKey);
+        }
+
+        return $memo;
+    }
+
+    public static function env()
+    {
+        return function () {
+            // Use config from environment variables, if available
+            $useArnRegion = getenv(self::ENV_USE_ARN_REGION);
+            if (!empty($useArnRegion)) {
+                return Promise\promise_for(
+                    new Configuration($useArnRegion)
+                );
+            }
+
+            return self::reject('Could not find environment variable config'
+                . ' in ' . self::ENV_USE_ARN_REGION);
+        };
+    }
+
+    public static function ini($profile = null, $filename = null)
+    {
+        $filename = $filename ?: (self::getHomeDir() . '/.aws/config');
+        $profile = $profile ?: (getenv(self::ENV_PROFILE) ?: 'default');
+
+        return function () use ($profile, $filename) {
+            if (!is_readable($filename)) {
+                return self::reject("Cannot read configuration from $filename");
+            }
+
+            // Use INI_SCANNER_NORMAL instead of INI_SCANNER_TYPED for PHP 5.5 compatibility
+            $data = \Aws\parse_ini_file($filename, true, INI_SCANNER_NORMAL);
+            if ($data === false) {
+                return self::reject("Invalid config file: $filename");
+            }
+            if (!isset($data[$profile])) {
+                return self::reject("'$profile' not found in config file");
+            }
+            if (!isset($data[$profile][self::INI_USE_ARN_REGION])) {
+                return self::reject("Required S3 Use Arn Region config values 
+                    not present in INI profile '{$profile}' ({$filename})");
+            }
+
+            // INI_SCANNER_NORMAL parses false-y values as an empty string
+            if ($data[$profile][self::INI_USE_ARN_REGION] === "") {
+                $data[$profile][self::INI_USE_ARN_REGION] = false;
+            }
+
+            return Promise\promise_for(
+                new Configuration($data[$profile][self::INI_USE_ARN_REGION])
+            );
+        };
+    }
+
+    public static function fallback()
+    {
+        return function () {
+            return Promise\promise_for(
+                new Configuration(self::DEFAULT_USE_ARN_REGION)
+            );
+        };
+    }
+}