media-cloud-sync / includes / sdk / s3 / GuzzleHttp / Psr7 / UriNormalizer.php

UriNormalizer.php in Media Cloud Sync 1.3.11, at includes/sdk/s3/GuzzleHttp/Psr7/UriNormalizer.php

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1	<?php
2
3	declare (strict_types=1);
4	namespace Dudlewebs\WPMCS\s3\GuzzleHttp\Psr7;
5
6	use Dudlewebs\WPMCS\s3\Psr\Http\Message\UriInterface;
7	/**
8	* Provides methods to normalize and compare URIs.
9	*
10	* @author Tobias Schultze
11	*
12	* @see https://datatracker.ietf.org/doc/html/rfc3986#section-6
13	*/
14	final class UriNormalizer
15	{
16	/**
17	* Default normalizations which only include the ones that preserve semantics.
18	*/
19	public const PRESERVING_NORMALIZATIONS = self::CAPITALIZE_PERCENT_ENCODING \| self::DECODE_UNRESERVED_CHARACTERS \| self::CONVERT_EMPTY_PATH \| self::REMOVE_DEFAULT_HOST \| self::REMOVE_DEFAULT_PORT \| self::REMOVE_DOT_SEGMENTS;
20	/**
21	* All letters within a percent-encoding triplet (e.g., "%3A") are case-insensitive, and should be capitalized.
22	*
23	* Example: http://example.org/a%c2%b1b → http://example.org/a%C2%B1b
24	*/
25	public const CAPITALIZE_PERCENT_ENCODING = 1;
26	/**
27	* Decodes percent-encoded octets of unreserved characters.
28	*
29	* For consistency, percent-encoded octets in the ranges of ALPHA (%41–%5A and %61–%7A), DIGIT (%30–%39),
30	* hyphen (%2D), period (%2E), underscore (%5F), or tilde (%7E) should not be created by URI producers and,
31	* when found in a URI, should be decoded to their corresponding unreserved characters by URI normalizers.
32	*
33	* Example: http://example.org/%7Eusern%61me/ → http://example.org/~username/
34	*/
35	public const DECODE_UNRESERVED_CHARACTERS = 2;
36	/**
37	* Converts the empty path to "/" for http and https URIs.
38	*
39	* Example: http://example.org → http://example.org/
40	*/
41	public const CONVERT_EMPTY_PATH = 4;
42	/**
43	* Removes the default host of the given URI scheme from the URI.
44	*
45	* Only the "file" scheme defines the default host "localhost".
46	* All of `file:/myfile`, `file:///myfile`, and `file://localhost/myfile`
47	* are equivalent according to RFC 3986. The first format is not accepted
48	* by PHPs stream functions and thus already normalized implicitly to the
49	* second format in the Uri class. See `GuzzleHttp\Psr7\Uri::composeComponents`.
50	*
51	* Example: file://localhost/myfile → file:///myfile
52	*/
53	public const REMOVE_DEFAULT_HOST = 8;
54	/**
55	* Removes the default port of the given URI scheme from the URI.
56	*
57	* Example: http://example.org:80/ → http://example.org/
58	*/
59	public const REMOVE_DEFAULT_PORT = 16;
60	/**
61	* Removes unnecessary dot-segments.
62	*
63	* Dot-segments in relative-path references are not removed as it would
64	* change the semantics of the URI reference.
65	*
66	* Example: http://example.org/../a/b/../c/./d.html → http://example.org/a/c/d.html
67	*/
68	public const REMOVE_DOT_SEGMENTS = 32;
69	/**
70	* Paths which include two or more adjacent slashes are converted to one.
71	*
72	* Webservers usually ignore duplicate slashes and treat those URIs equivalent.
73	* But in theory those URIs do not need to be equivalent. So this normalization
74	* may change the semantics. Encoded slashes (%2F) are not removed.
75	*
76	* Example: http://example.org//foo///bar.html → http://example.org/foo/bar.html
77	*/
78	public const REMOVE_DUPLICATE_SLASHES = 64;
79	/**
80	* Sort query parameters with their values in alphabetical order.
81	*
82	* However, the order of parameters in a URI may be significant (this is not defined by the standard).
83	* So this normalization is not safe and may change the semantics of the URI.
84	*
85	* Example: ?lang=en&article=fred → ?article=fred&lang=en
86	*
87	* Note: The sorting is neither locale nor Unicode aware (the URI query does not get decoded at all) as the
88	* purpose is to be able to compare URIs in a reproducible way, not to have the params sorted perfectly.
89	*/
90	public const SORT_QUERY_PARAMETERS = 128;
91	/**
92	* Returns a normalized URI.
93	*
94	* The scheme and host component are already normalized to lowercase per PSR-7 UriInterface.
95	* This methods adds additional normalizations that can be configured with the $flags parameter.
96	*
97	* PSR-7 UriInterface cannot distinguish between an empty component and a missing component as
98	* getQuery(), getFragment() etc. always return a string. This means the URIs "/?#" and "/" are
99	* treated equivalent which is not necessarily true according to RFC 3986. But that difference
100	* is highly uncommon in reality. So this potential normalization is implied in PSR-7 as well.
101	*
102	* @param UriInterface $uri The URI to normalize
103	* @param int $flags A bitmask of normalizations to apply, see constants
104	*
105	* @see https://datatracker.ietf.org/doc/html/rfc3986#section-6.2
106	*/
107	public static function normalize(UriInterface $uri, int $flags = self::PRESERVING_NORMALIZATIONS) : UriInterface
108	{
109	if ($flags & self::CAPITALIZE_PERCENT_ENCODING) {
110	$uri = self::capitalizePercentEncoding($uri);
111	}
112	if ($flags & self::DECODE_UNRESERVED_CHARACTERS) {
113	$uri = self::decodeUnreservedCharacters($uri);
114	}
115	if ($flags & self::CONVERT_EMPTY_PATH && $uri->getPath() === '' && ($uri->getScheme() === 'http' \|\| $uri->getScheme() === 'https')) {
116	$uri = $uri->withPath('/');
117	}
118	if ($flags & self::REMOVE_DEFAULT_HOST && $uri->getScheme() === 'file' && $uri->getHost() === 'localhost') {
119	$uri = $uri->withHost('');
120	}
121	if ($flags & self::REMOVE_DEFAULT_PORT && $uri->getPort() !== null && Uri::isDefaultPort($uri)) {
122	$uri = $uri->withPort(null);
123	}
124	if ($flags & self::REMOVE_DOT_SEGMENTS && !Uri::isRelativePathReference($uri)) {
125	$uri = $uri->withPath(UriResolver::removeDotSegments($uri->getPath()));
126	}
127	if ($flags & self::REMOVE_DUPLICATE_SLASHES) {
128	$uri = $uri->withPath(\preg_replace('#//++#', '/', $uri->getPath()));
129	}
130	if ($flags & self::SORT_QUERY_PARAMETERS && $uri->getQuery() !== '') {
131	$queryKeyValues = \explode('&', $uri->getQuery());
132	\sort($queryKeyValues);
133	$uri = $uri->withQuery(\implode('&', $queryKeyValues));
134	}
135	return $uri;
136	}
137	/**
138	* Whether two URIs can be considered equivalent.
139	*
140	* Both URIs are normalized automatically before comparison with the given $normalizations bitmask. The method also
141	* accepts relative URI references and returns true when they are equivalent. This of course assumes they will be
142	* resolved against the same base URI. If this is not the case, determination of equivalence or difference of
143	* relative references does not mean anything.
144	*
145	* @param UriInterface $uri1 An URI to compare
146	* @param UriInterface $uri2 An URI to compare
147	* @param int $normalizations A bitmask of normalizations to apply, see constants
148	*
149	* @see https://datatracker.ietf.org/doc/html/rfc3986#section-6.1
150	*/
151	public static function isEquivalent(UriInterface $uri1, UriInterface $uri2, int $normalizations = self::PRESERVING_NORMALIZATIONS) : bool
152	{
153	return (string) self::normalize($uri1, $normalizations) === (string) self::normalize($uri2, $normalizations);
154	}
155	private static function capitalizePercentEncoding(UriInterface $uri) : UriInterface
156	{
157	$regex = '/(?:%[A-Fa-f0-9]{2})++/';
158	$callback = function (array $match) : string {
159	return \strtoupper($match[0]);
160	};
161	return $uri->withPath(\preg_replace_callback($regex, $callback, $uri->getPath()))->withQuery(\preg_replace_callback($regex, $callback, $uri->getQuery()));
162	}
163	private static function decodeUnreservedCharacters(UriInterface $uri) : UriInterface
164	{
165	$regex = '/%(?:2D\|2E\|5F\|7E\|3[0-9]\|[46][1-9A-F]\|[57][0-9A])/i';
166	$callback = function (array $match) : string {
167	return \rawurldecode($match[0]);
168	};
169	return $uri->withPath(\preg_replace_callback($regex, $callback, $uri->getPath()))->withQuery(\preg_replace_callback($regex, $callback, $uri->getQuery()));
170	}
171	private function __construct()
172	{
173	// cannot be instantiated
174	}
175	}
176