media-cloud-sync / includes / sdk / s3 / Aws / Endpoint / UseDualstackEndpoint / ConfigurationProvider.php

ConfigurationProvider.php in Media Cloud Sync 1.1.1, at includes/sdk/s3/Aws/Endpoint/UseDualstackEndpoint/ConfigurationProvider.php

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1	<?php
2
3	namespace Dudlewebs\WPMCS\s3\Aws\Endpoint\UseDualstackEndpoint;
4
5	use Dudlewebs\WPMCS\s3\Aws\AbstractConfigurationProvider;
6	use Dudlewebs\WPMCS\s3\Aws\CacheInterface;
7	use Dudlewebs\WPMCS\s3\Aws\ConfigurationProviderInterface;
8	use Dudlewebs\WPMCS\s3\Aws\Endpoint\UseDualstackEndpoint\Exception\ConfigurationException;
9	use Dudlewebs\WPMCS\s3\GuzzleHttp\Promise;
10	/**
11	* A configuration provider is a function that returns a promise that is
12	* fulfilled with a {@see \Aws\Endpoint\UseDualstackEndpoint\onfigurationInterface}
13	* or rejected with an {@see \Aws\Endpoint\UseDualstackEndpoint\ConfigurationException}.
14	*
15	* <code>
16	* use Aws\Endpoint\UseDualstackEndpoint\ConfigurationProvider;
17	* $provider = ConfigurationProvider::defaultProvider();
18	* // Returns a ConfigurationInterface or throws.
19	* $config = $provider()->wait();
20	* </code>
21	*
22	* Configuration providers can be composed to create configuration using
23	* conditional logic that can create different configurations in different
24	* environments. You can compose multiple providers into a single provider using
25	* {@see Aws\Endpoint\UseDualstackEndpoint\ConfigurationProvider::chain}. This function
26	* accepts providers as variadic arguments and returns a new function that will
27	* invoke each provider until a successful configuration is returned.
28	*
29	* <code>
30	* // First try an INI file at this location.
31	* $a = ConfigurationProvider::ini(null, '/path/to/file.ini');
32	* // Then try an INI file at this location.
33	* $b = ConfigurationProvider::ini(null, '/path/to/other-file.ini');
34	* // Then try loading from environment variables.
35	* $c = ConfigurationProvider::env();
36	* // Combine the three providers together.
37	* $composed = ConfigurationProvider::chain($a, $b, $c);
38	* // Returns a promise that is fulfilled with a configuration or throws.
39	* $promise = $composed();
40	* // Wait on the configuration to resolve.
41	* $config = $promise->wait();
42	* </code>
43	*/
44	class ConfigurationProvider extends AbstractConfigurationProvider implements ConfigurationProviderInterface
45	{
46	const ENV_USE_DUAL_STACK_ENDPOINT = 'AWS_USE_DUALSTACK_ENDPOINT';
47	const INI_USE_DUAL_STACK_ENDPOINT = 'use_dualstack_endpoint';
48	public static $cacheKey = 'aws_cached_use_dualstack_endpoint_config';
49	protected static $interfaceClass = ConfigurationInterface::class;
50	protected static $exceptionClass = ConfigurationException::class;
51	/**
52	* Create a default config provider that first checks for environment
53	* variables, then checks for a specified profile in the environment-defined
54	* config file location (env variable is 'AWS_CONFIG_FILE', file location
55	* defaults to ~/.aws/config), then checks for the "default" profile in the
56	* environment-defined config file location, and failing those uses a default
57	* fallback set of configuration options.
58	*
59	* This provider is automatically wrapped in a memoize function that caches
60	* previously provided config options.
61	*
62	* @param array $config
63	*
64	* @return callable
65	*/
66	public static function defaultProvider(array $config = [])
67	{
68	$region = $config['region'];
69	$configProviders = [self::env($region)];
70	if (!isset($config['use_aws_shared_config_files']) \|\| $config['use_aws_shared_config_files'] != \false) {
71	$configProviders[] = self::ini($region);
72	}
73	$configProviders[] = self::fallback($region);
74	$memo = self::memoize(\call_user_func_array([ConfigurationProvider::class, 'chain'], $configProviders));
75	if (isset($config['use_dual_stack_endpoint']) && $config['use_dual_stack_endpoint'] instanceof CacheInterface) {
76	return self::cache($memo, $config['use_dual_stack_endpoint'], self::$cacheKey);
77	}
78	return $memo;
79	}
80	/**
81	* Provider that creates config from environment variables.
82	*
83	* @return callable
84	*/
85	public static function env($region)
86	{
87	return function () use($region) {
88	// Use config from environment variables, if available
89	$useDualstackEndpoint = \getenv(self::ENV_USE_DUAL_STACK_ENDPOINT);
90	if (!empty($useDualstackEndpoint)) {
91	return Promise\Create::promiseFor(new Configuration($useDualstackEndpoint, $region));
92	}
93	return self::reject('Could not find environment variable config' . ' in ' . self::ENV_USE_DUAL_STACK_ENDPOINT);
94	};
95	}
96	/**
97	* Config provider that creates config using a config file whose location
98	* is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
99	* ~/.aws/config if not specified
100	*
101	* @param string\|null $profile Profile to use. If not specified will use
102	* the "default" profile.
103	* @param string\|null $filename If provided, uses a custom filename rather
104	* than looking in the default directory.
105	*
106	* @return callable
107	*/
108	public static function ini($region, $profile = null, $filename = null)
109	{
110	$filename = $filename ?: self::getDefaultConfigFilename();
111	$profile = $profile ?: (\getenv(self::ENV_PROFILE) ?: 'default');
112	return function () use($region, $profile, $filename) {
113	if (!@\is_readable($filename)) {
114	return self::reject("Cannot read configuration from {$filename}");
115	}
116	// Use INI_SCANNER_NORMAL instead of INI_SCANNER_TYPED for PHP 5.5 compatibility
117	$data = \Dudlewebs\WPMCS\s3\Aws\parse_ini_file($filename, \true, \INI_SCANNER_NORMAL);
118	if ($data === \false) {
119	return self::reject("Invalid config file: {$filename}");
120	}
121	if (!isset($data[$profile])) {
122	return self::reject("'{$profile}' not found in config file");
123	}
124	if (!isset($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT])) {
125	return self::reject("Required use dualstack endpoint config values\n not present in INI profile '{$profile}' ({$filename})");
126	}
127	// INI_SCANNER_NORMAL parses false-y values as an empty string
128	if ($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT] === "") {
129	$data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT] = \false;
130	}
131	return Promise\Create::promiseFor(new Configuration($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT], $region));
132	};
133	}
134	/**
135	* Fallback config options when other sources are not set.
136	*
137	* @return callable
138	*/
139	public static function fallback($region)
140	{
141	return function () use($region) {
142	return Promise\Create::promiseFor(new Configuration(\false, $region));
143	};
144	}
145	}
146