Header.php — ShareThis Dashboard for Google Analytics trunk

googleanalytics / lib / analytics-admin / vendor / guzzlehttp / psr7 / src / Header.php

googleanalytics / lib / analytics-admin / vendor / guzzlehttp / psr7 / src Last commit date

Header.php

135 lines

1	<?php
2
3	declare(strict_types=1);
4
5	namespace GuzzleHttp\Psr7;
6
7	final class Header
8	{
9	/**
10	* Parse an array of header values containing ";" separated data into an
11	* array of associative arrays representing the header key value pair data
12	* of the header. When a parameter does not contain a value, but just
13	* contains a key, this function will inject a key with a '' string value.
14	*
15	* @param string\|array $header Header to parse into components.
16	*/
17	public static function parse($header): array
18	{
19	static $trimmed = "\"' \n\t\r";
20	$params = $matches = [];
21
22	foreach ((array) $header as $value) {
23	foreach (self::splitList($value) as $val) {
24	$part = [];
25	foreach (preg_split('/;(?=([^"]"[^"]")[^"]$)/', $val) as $kvp) {
26	if (preg_match_all('/<[^>]+>\|[^=]+/', $kvp, $matches)) {
27	$m = $matches[0];
28	if (isset($m[1])) {
29	$part[trim($m[0], $trimmed)] = trim($m[1], $trimmed);
30	} else {
31	$part[] = trim($m[0], $trimmed);
32	}
33	}
34	}
35	if ($part) {
36	$params[] = $part;
37	}
38	}
39	}
40
41	return $params;
42	}
43
44	/**
45	* Converts an array of header values that may contain comma separated
46	* headers into an array of headers with no comma separated values.
47	*
48	* @param string\|array $header Header to normalize.
49	*
50	* @deprecated Use self::splitList() instead.
51	*/
52	public static function normalize($header): array
53	{
54	$result = [];
55	foreach ((array) $header as $value) {
56	foreach (self::splitList($value) as $parsed) {
57	$result[] = $parsed;
58	}
59	}
60
61	return $result;
62	}
63
64	/**
65	* Splits a HTTP header defined to contain comma-separated list into
66	* each individual value. Empty values will be removed.
67	*
68	* Example headers include 'accept', 'cache-control' and 'if-none-match'.
69	*
70	* This method must not be used to parse headers that are not defined as
71	* a list, such as 'user-agent' or 'set-cookie'.
72	*
73	* @param string\|string[] $values Header value as returned by MessageInterface::getHeader()
74	*
75	* @return string[]
76	*/
77	public static function splitList($values): array
78	{
79	if (!\is_array($values)) {
80	$values = [$values];
81	}
82
83	$result = [];
84	foreach ($values as $value) {
85	if (!\is_string($value)) {
86	throw new \TypeError('$header must either be a string or an array containing strings.');
87	}
88
89	$v = '';
90	$isQuoted = false;
91	$isEscaped = false;
92	for ($i = 0, $max = \strlen($value); $i < $max; $i++) {
93	if ($isEscaped) {
94	$v .= $value[$i];
95	$isEscaped = false;
96
97	continue;
98	}
99
100	if (!$isQuoted && $value[$i] === ',') {
101	$v = \trim($v);
102	if ($v !== '') {
103	$result[] = $v;
104	}
105
106	$v = '';
107	continue;
108	}
109
110	if ($isQuoted && $value[$i] === '\\') {
111	$isEscaped = true;
112	$v .= $value[$i];
113
114	continue;
115	}
116	if ($value[$i] === '"') {
117	$isQuoted = !$isQuoted;
118	$v .= $value[$i];
119
120	continue;
121	}
122
123	$v .= $value[$i];
124	}
125
126	$v = \trim($v);
127	if ($v !== '') {
128	$result[] = $v;
129	}
130	}
131
132	return $result;
133	}
134	}
135