class-thelib-net.php — Hustle – Email Marketing, Lead Generation, Optins, Popups 7.3.7

wordpress-popup / lib / wpmu-lib / inc / class-thelib-net.php

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class-thelib-array.php 5 years ago class-thelib-core.php 5 years ago class-thelib-debug.php 5 years ago class-thelib-html.php 5 years ago class-thelib-net.php 5 years ago class-thelib-session.php 5 years ago class-thelib-ui.php 5 years ago class-thelib-updates.php 5 years ago class-thelib.php 5 years ago

class-thelib-net.php

210 lines

1	<?php
2	/**
3	* The Net component.
4	* Access via function `lib3()->net`.
5	*
6	* @since 2.0.0
7	*/
8	class TheLib_Net extends TheLib {
9
10	/**
11	* Returns the current URL.
12	* This URL is not guaranteed to look exactly same as the user sees it.
13	* E.g. Hashtags are missing ("index.php#section-a")
14	*
15	* @since 1.0.7
16	* @api
17	*
18	* @param string $protocol Optional. Define URL protocol ('http', 'https')
19	* @return string Full URL to current page.
20	*/
21	public function current_url( $protocol = null ) {
22	static $Url = array();
23
24	if ( null !== $protocol ) {
25	// Remove the "://" part, if it was provided
26	$protocol = array_shift( explode( ':', $protocol ) );
27	}
28
29	if ( ! isset( $Url[$protocol] ) ) {
30	if ( null === $protocol ) {
31	$cur_url = 'http';
32
33	if ( isset( $_SERVER['HTTPS'] )
34	&& 'on' == strtolower( $_SERVER['HTTPS'] )
35	) {
36	$cur_url .= 's';
37	}
38	} else {
39	$cur_url = $protocol;
40	}
41
42	$is_ssl = (false !== strpos( $cur_url, 'https' ));
43	$cur_url .= '://';
44
45	if ( isset( $_SERVER['SERVER_NAME'] ) ) {
46	$cur_url .= $_SERVER['SERVER_NAME'];
47	} elseif ( defined( 'WP_TESTS_DOMAIN' ) ) {
48	$cur_url .= WP_TESTS_DOMAIN;
49	}
50
51	if ( ! isset( $_SERVER['SERVER_PORT'] ) ) {
52	if ( $is_ssl ) { $_SERVER['SERVER_PORT'] = '443'; }
53	else { $_SERVER['SERVER_PORT'] = '80'; }
54	}
55
56	if ( ( ! $is_ssl && '80' != $_SERVER['SERVER_PORT'] ) \|\|
57	( $is_ssl && !in_array( $_SERVER['SERVER_PORT'], array( '80', '443' ) ) )
58	) {
59	$cur_url .= ':' . $_SERVER['SERVER_PORT'];
60	}
61
62	if ( empty( $_SERVER['REQUEST_URI'] ) ) {
63	$cur_url = trailingslashit( $cur_url );
64	} else {
65	$cur_url .= $_SERVER['REQUEST_URI'];
66	}
67
68	$Url[$protocol] = $cur_url;
69	}
70
71	return $Url[$protocol];
72	}
73
74	/**
75	* Changes a relative URL to an absolute URL.
76	* This function uses WordPress `home_url()` to expand a relative URL.
77	*
78	* @uses home_url()
79	*
80	* @since 2.0.0
81	* @api
82	*
83	* @param string $url An URL that can be absolute or relative.
84	* @return string The absolute URL.
85	*/
86	public function expand_url( $url ) {
87	if ( false === strpos( $url, '://' ) ) {
88	$url = home_url( $url );
89	}
90
91	return $url;
92	}
93
94	/**
95	* Retrieves the best guess of the client's actual IP address.
96	* Takes into account numerous HTTP proxy headers due to variations
97	* in how different ISPs handle IP addresses in headers between hops.
98	*
99	* @since 1.1.3
100	* @api
101	*
102	* @return object {
103	* IP Address details
104	*
105	* @type string $ip The users IP address (might be spoofed, if $proxy is true)
106	* @type bool $proxy True, if a proxy was detected
107	* @type string $proxy_id The proxy-server IP address
108	* }
109	*/
110	public function current_ip() {
111	$result = (object) array(
112	'ip' => $_SERVER['REMOTE_ADDR'],
113	'proxy' => false,
114	'proxy_ip' => '',
115	);
116
117	/*
118	* This code tries to bypass a proxy and get the actual IP address of
119	* the visitor behind the proxy.
120	* Warning: These values might be spoofed!
121	*/
122	$ip_fields = array(
123	'HTTP_CLIENT_IP',
124	'HTTP_X_FORWARDED_FOR',
125	'HTTP_X_FORWARDED',
126	'HTTP_X_CLUSTER_CLIENT_IP',
127	'HTTP_FORWARDED_FOR',
128	'HTTP_FORWARDED',
129	'REMOTE_ADDR',
130	);
131	$forwarded = false;
132	foreach ( $ip_fields as $key ) {
133	if ( true === array_key_exists( $key, $_SERVER ) ) {
134	foreach ( explode( ',', $_SERVER[$key] ) as $ip ) {
135	$ip = trim( $ip );
136
137	if ( false !== filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE \| FILTER_FLAG_NO_RES_RANGE ) ) {
138	$forwarded = $ip;
139	break 2;
140	}
141	}
142	}
143	}
144
145	// If we found a different IP address then REMOTE_ADDR then it's a proxy!
146	if ( ! empty( $forwarded ) && $forwarded != $result->ip ) {
147	$result->proxy = true;
148	$result->proxy_ip = $result->ip;
149	$result->ip = $forwarded;
150	}
151
152	return $result;
153	}
154
155	/**
156	* Starts a file download and terminates the current request.
157	* Note that this does not work inside Ajax requests!
158	*
159	* @since 1.1.0
160	* @api
161	*
162	* @param string $contents The file contents (text file).
163	* @param string $filename The file name.
164	*/
165	public function file_download( $contents, $filename ) {
166	// Send the download headers.
167	header( 'Pragma: public' );
168	header( 'Expires: 0' );
169	header( 'Cache-Control: must-revalidate, post-check=0, pre-check=0' );
170	header( 'Cache-Control: private', false ); // required for certain browsers
171	header( 'Content-type: application/json' );
172	header( 'Content-Disposition: attachment; filename="' . $filename . '"' );
173	header( 'Content-Transfer-Encoding: binary' );
174	header( 'Content-Length: ' . strlen( $contents ) );
175
176	// Finally send the export-file content.
177	echo $contents;
178
179	exit;
180	}
181
182	/**
183	* Checks if the specified URL is publicly reachable.
184	*
185	* @since 1.1.0
186	* @api
187	*
188	* @param string $url The URL to check.
189	* @return bool If URL is online or not.
190	*/
191	public function is_online( $url ) {
192	static $Checked = array();
193
194	if ( ! isset( $Checked[$url] ) ) {
195	$check = 'https://downforeveryoneorjustme.com/' . $url;
196	$res = wp_remote_get( $check, array( 'decompress' => false ) );
197
198	if ( is_wp_error( $res ) ) {
199	$state = false;
200	} else {
201	$state = ( false === stripos( $res['body'], 'not just you' ) );
202	}
203
204	$Checked[$url] = $state;
205	}
206
207	return $Checked[$url];
208	}
209
210	}