http/src/Http/Helpers.php at 2d75671be307d112b0ffb4e74af82faff7eb7ba3 · nette/http · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

namespace Nette\Http;

use Nette;
use Nette\Utils\DateTime;


/**
 * Rendering helpers for HTTP.
 */
class Helpers
{
	use Nette\StaticClass;

	/**
	 * Returns HTTP valid date format.
	 * @param  string|int|\DateTimeInterface
	 * @return string
	 */
	public static function formatDate($time)
	{
		$time = DateTime::from($time);
		$time->setTimezone(new \DateTimeZone('GMT'));
		return $time->format('D, d M Y H:i:s \G\M\T');
	}


	/**
	 * Is IP address in CIDR block?
	 * @return bool
	 */
	public static function ipMatch($ip, $mask)
	{
		list($mask, $size) = explode('/', $mask . '/');
		$tmp = function ($n) { return sprintf('%032b', $n); };
		$ip = implode('', array_map($tmp, unpack('N*', inet_pton($ip))));
		$mask = implode('', array_map($tmp, unpack('N*', inet_pton($mask))));
		$max = strlen($ip);
		if (!$max || $max !== strlen($mask) || (int) $size < 0 || (int) $size > $max) {
			return FALSE;
		}
		return strncmp($ip, $mask, $size === '' ? $max : (int) $size) === 0;
	}


	public static function parseHeader($value)
	{
		$tokenizer = new Nette\Utils\Tokenizer([
			'word' => '[\\w!#$%&\'*+\\-.\\^`|\\~/]+', // "/" manually allowed

			'quoted' => '"(?:\\\\[\x01-\x7F]|[^"\\\\\x00\x80-\xFF])*+"',
			'equal' => '=',
			'semicolon' => ';',
			'ows' => '\h+',
		]);

		$tokens = $tokenizer->tokenize("$value;");
		$parsed = [];
		$k = NULL;
		$v = NULL;
		$e = FALSE;

		foreach ($tokens as list($value, $offset, $type)) {
			if ($type === 'word') {
				if ($e && $v === NULL) {
					$v = $value;
				} elseif ($k === NULL) {
					$k = $value;
				} else {
					throw new \Exception();
				}

			} elseif ($type === 'quoted') {
				$value = stripslashes(substr($value, 1, -1));
				if ($e && $v === NULL) {
					$v = $value;
				} else {
					throw new \Exception();
				}

			} elseif ($type === 'semicolon') {
				if ($k === NULL) {
					throw new \Exception();
				}
				$parsed[$k] = $v;
				$k = $v = NULL;
				$e = FALSE;

			} elseif ($type === 'equal') {
				if ($e || $k === NULL) {
					throw new \Exception();
				}

				$e = TRUE;
			}
		}

		return $parsed;
	}


	/**
	 * Removes duplicate cookies from response.
	 * @return void
	 * @internal
	 */
	public static function removeDuplicateCookies()
	{
		if (headers_sent($file, $line) || ini_get('suhosin.cookie.encrypt')) {
			return;
		}

		$flatten = [];
		foreach (headers_list() as $header) {
			if (preg_match('#^Set-Cookie: .+?=#', $header, $m)) {
				$flatten[$m[0]] = $header;
				header_remove('Set-Cookie');
			}
		}
		foreach (array_values($flatten) as $key => $header) {
			header($header, $key === 0);
		}
	}

}