├── .idea
├── DeadlinkChecker.iml
├── encodings.xml
└── modules.xml
├── .phpunit.result.cache
├── LICENSE.txt
├── README.md
├── composer.json
├── composer.lock
├── phpunit.xml.dist.bak
└── src
└── CheckIfDead.php
/.idea/DeadlinkChecker.iml:
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1 | {"version":1,"defects":{"checkIfDeadTest::testIsLinkDead with data set #39":5,"checkIfDeadTest::testAreLinksDead":5},"times":{"checkIfDeadTest::testIsLinkDead with data set #0":2.801,"checkIfDeadTest::testIsLinkDead with data set #1":0.908,"checkIfDeadTest::testIsLinkDead with data set #2":2.821,"checkIfDeadTest::testIsLinkDead with data set #3":1.398,"checkIfDeadTest::testIsLinkDead with data set #4":1.527,"checkIfDeadTest::testIsLinkDead with data set #5":1.438,"checkIfDeadTest::testIsLinkDead with data set #6":4.896,"checkIfDeadTest::testIsLinkDead with data set #7":0.301,"checkIfDeadTest::testIsLinkDead with data set #8":0.167,"checkIfDeadTest::testIsLinkDead with data set #9":0.166,"checkIfDeadTest::testIsLinkDead with data set #10":3.663,"checkIfDeadTest::testIsLinkDead with data set #11":0.452,"checkIfDeadTest::testIsLinkDead with data set #12":1.276,"checkIfDeadTest::testIsLinkDead with data set #13":0.296,"checkIfDeadTest::testIsLinkDead with data set #14":1.836,"checkIfDeadTest::testIsLinkDead with data set #15":0.174,"checkIfDeadTest::testIsLinkDead with data set #16":0.567,"checkIfDeadTest::testIsLinkDead with data set #17":1.99,"checkIfDeadTest::testIsLinkDead with data set #18":0.593,"checkIfDeadTest::testIsLinkDead with data set #19":0.937,"checkIfDeadTest::testIsLinkDead with data set #20":2.389,"checkIfDeadTest::testIsLinkDead with data set #21":0.486,"checkIfDeadTest::testIsLinkDead with data set #22":0.283,"checkIfDeadTest::testIsLinkDead with data set #23":2.689,"checkIfDeadTest::testIsLinkDead with data set #24":0.368,"checkIfDeadTest::testIsLinkDead with data set #25":0.654,"checkIfDeadTest::testIsLinkDead with data set #26":0.349,"checkIfDeadTest::testIsLinkDead with data set #27":0.434,"checkIfDeadTest::testIsLinkDead with data set #28":1.021,"checkIfDeadTest::testIsLinkDead with data set #29":90.14,"checkIfDeadTest::testIsLinkDead with data set #30":2.945,"checkIfDeadTest::testIsLinkDead with data set #31":30.696,"checkIfDeadTest::testIsLinkDead with data set #32":0.14,"checkIfDeadTest::testIsLinkDead with data set #33":0.333,"checkIfDeadTest::testIsLinkDead with data set #34":0.353,"checkIfDeadTest::testIsLinkDead with data set #35":7.122,"checkIfDeadTest::testIsLinkDead with data set #36":31.27,"checkIfDeadTest::testIsLinkDead with data set #37":90.164,"checkIfDeadTest::testIsLinkDead with data set #38":0,"checkIfDeadTest::testIsLinkDead with data set #39":0,"checkIfDeadTest::testIsLinkDead with data set #40":1.345,"checkIfDeadTest::testAreLinksDead":2.795,"checkIfDeadTest::testCleanURL with data set #0":0,"checkIfDeadTest::testCleanURL with data set #1":0,"checkIfDeadTest::testCleanURL with data set #2":0,"checkIfDeadTest::testCleanURL with data set #3":0,"checkIfDeadTest::testCleanURL with data set #4":0,"checkIfDeadTest::testSanitizeURL with data set #0":0,"checkIfDeadTest::testSanitizeURL with data set #1":0,"checkIfDeadTest::testSanitizeURL with data set #2":0,"checkIfDeadTest::testSanitizeURL with data set #3":0,"checkIfDeadTest::testSanitizeURL with data set #4":0,"checkIfDeadTest::testSanitizeURL with data set #5":0,"checkIfDeadTest::testSanitizeURL with data set #6":0,"checkIfDeadTest::testSanitizeURL with data set #7":0,"checkIfDeadTest::testSanitizeURL with data set #8":0,"checkIfDeadTest::testSanitizeURL with data set #9":0,"checkIfDeadTest::testSanitizeURL with data set #10":0,"checkIfDeadTest::testSanitizeURL with data set #11":0,"checkIfDeadTest::testSanitizeURL with data set #12":0,"checkIfDeadTest::testSanitizeURL with data set #13":0,"checkIfDeadTest::testSanitizeURL with data set #14":0,"checkIfDeadTest::testSanitizeURL with data set #15":0,"checkIfDeadTest::testSanitizeURL with data set #16":0,"checkIfDeadTest::testSanitizeURL with data set #17":0,"checkIfDeadTest::testParseURL with data set #0":0,"checkIfDeadTest::testParseURL with data set #1":0}}
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669 | The GNU General Public License does not permit incorporating your program
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671 | may consider it more useful to permit linking proprietary applications with
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674 | .
675 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # DeadlinkChecker
2 |
3 | Maintainer: [Cyberpower678](https://github.com/Cyberpower678)
4 |
5 | REQUIRES: PHP 7.3 or higher
6 |
7 | This is a PHP library for detecting whether URLs on the internet are alive or dead via cURL. It includes the following features:
8 |
9 | * Supports HTTP, HTTPS, FTP, MMS, and RTSP URLs
10 | * Supports TOR
11 | * Supports [internationalized domain names](https://en.wikipedia.org/wiki/Internationalized_domain_name)
12 | * Basic detection for [soft 404s](https://en.wikipedia.org/wiki/HTTP_404#Soft_404_errors)
13 | * For optimized performance, it initially performs a header-only page request (CURLOPT_NOBODY). If that request fails, it then tries to do a normal full body page request.
14 | * Concurrently checks batch of URLs for efficiency
15 |
16 |
17 |
18 | ### Overview
19 |
20 | The checkIfDead library is a PHP library designed for assessing the status of URLs on the web and dark web. It operates by taking one or more URLs as inputs and concurrently checks them, to enhance response times.
21 |
22 | It can handle both properly and improperly formatted URLs and performs basic sanity checking and error correction on malformed inputs. All inputs are normalized through the sanitizer to ensure the curl library communicates properly with the target.
23 |
24 | When left at defaults, the library will emulate a web browser request and follow redirects to its destination.
25 |
26 | ### Installation
27 |
28 | Using composer:
29 | Add the following to the composer.json file for your project:
30 |
31 | ```
32 | {
33 | "require": {
34 | "wikimedia/deadlinkchecker": "dev-master"
35 | }
36 | }
37 | ```
38 |
39 | And then run 'composer update'.
40 |
41 | Or using git:
42 |
43 | ```
44 | $ git clone https://github.com/wikimedia/DeadlinkChecker.git
45 | ```
46 |
47 | ### Basic Usage
48 |
49 | ##### For checking a single link:
50 |
51 | ```
52 | $deadLinkChecker = new checkIfDead();
53 | $url = 'https://en.wikipedia.org';
54 | $exec = $deadLinkChecker->isLinkDead( $url );
55 | echo var_export( $exec );
56 | ```
57 |
58 | Prints:
59 |
60 | ```
61 | false
62 | ```
63 |
64 | ##### For checking an array of links:
65 |
66 | ```
67 | $deadLinkChecker = new checkIfDead();
68 | $urls = [ 'https://en.wikipedia.org/nothing', 'https://en.wikipedia.org' ];
69 | $exec = $deadLinkChecker->areLinksDead( $urls );
70 | echo var_export( $exec );
71 | ```
72 |
73 | Prints:
74 |
75 | ```
76 | array (
77 | 'https://en.wikipedia.org/nothing' => true,
78 | 'https://en.wikipedia.org' => false,
79 | )
80 | ```
81 |
82 | Note that these functions will return `null` if they are unable to determine whether a link is alive or dead.
83 |
84 | ### Advanced Usage
85 |
86 | You can control how long it takes before page requests timeout by passing parameters to the constructor. To set the header-only page requests to a 10 second timeout and the full page requests to a 20 second timeout, you would use the following:
87 |
88 | ```
89 | $deadLinkChecker = new checkIfDead( 10, 20 );
90 | ```
91 |
92 | In addition to controlling query timeouts, a custom user agent can be passed to the library as well like so:
93 |
94 | ```angular2html
95 | $deadLinkChecker = new checkIfDead( 10, 20, "Custom Agent" );
96 | ```
97 |
98 | By default, multiple URLs of the same domain are queued sequentially to be respectul to the hosts. However, this can be disabled so all URLs are queried concurrently as follows:
99 |
100 | ```angular2html
101 | $deadLinkChecker = new checkIfDead( 10, 20, "Custom Agent", false );
102 | ```
103 |
104 | You can increase the verbosity of the output to follow what the library is doing as it's doing it.
105 |
106 | ```angular2html
107 | $deadLinkChecker = new checkIfDead( 10, 20, "Custom Agent", true, true );
108 | ```
109 |
110 | Finally, because the library supports TOR requests, the environment will need a working SOCKS5 proxy to make the requests. The library looks for the SOCKS5 proxy using system defaults, but the proxy can be specified manually.
111 |
112 | ```angular2html
113 | $deadLinkChecker = new checkIfDead( 10, 20, "Custom Agent", true, false, "proxy.host", proxy_port );
114 | ```
115 |
116 | ### Getting details about the last batch of URLs checked
117 |
118 | After a batch of URLs have been checked, you can use `$deadLinkChecker->getErrors()` to get the curl errors encountered during the process, and `$deadLinkChecker->getRequestDetails()` to get the curl request details of all URLs checked in the last batch.
119 |
120 | ### Other functions
121 |
122 | To clean up dirty URLs and allow them to be normalized to correctly line with varying HTTP clients:
123 |
124 | ```angular2html
125 | $deadLinkChecker->sanitizeURL( "https://example.com/", $stripFragment );
126 | ```
127 |
128 | By default, $stripFragment is false. When set to true, URL fragments are dropped.
129 |
130 | Because PHP has a tendency to fail parsing URLs containing UTF-8 characters, you can use the library's parseURL method.
131 |
132 | ```angular2html
133 | $deadLinkChecker->parseURL( $url );
134 | ```
135 |
136 | ### License
137 |
138 | This code is distributed under [GNU GPLv3+](https://www.gnu.org/copyleft/gpl.html)
--------------------------------------------------------------------------------
/composer.json:
--------------------------------------------------------------------------------
1 | {
2 | "name": "wikimedia/deadlinkchecker",
3 | "replace": {
4 | "niharika29/deadlinkchecker": "*"
5 | },
6 | "type": "library",
7 | "description": "Library for checking if a given link is dead or alive",
8 | "keywords": [
9 | "deadlink",
10 | "link"
11 | ],
12 | "homepage": "https://www.mediawiki.org/wiki/DeadlinkChecker",
13 | "license": "GPL-3.0-or-later",
14 | "authors": [
15 | {
16 | "name": "Niharika Kohli",
17 | "email": "niharikakohli29@gmail.com",
18 | "role": "Developer"
19 | },
20 | {
21 | "name": "Maximilian Doerr",
22 | "email": "maximilian.doerr@gmail.com",
23 | "role": "Developer"
24 | }
25 | ],
26 | "autoload": {
27 | "psr-4": {
28 | "Wikimedia\\DeadlinkChecker\\": "src/"
29 | }
30 | },
31 | "require": {
32 | "ext-curl": "*",
33 | "ext-intl": "*",
34 | "lib-curl": ">=7.43.0",
35 | "php": ">=7.3.0"
36 | },
37 | "require-dev": {
38 | "jakub-onderka/php-parallel-lint": "v1.0.0",
39 | "mediawiki/mediawiki-codesniffer": "v39.0.0",
40 | "phpunit/phpunit": "^9.6"
41 | },
42 | "scripts": {
43 | "fix": "phpcbf",
44 | "test": [
45 | "composer validate --no-interaction",
46 | "parallel-lint . --exclude vendor",
47 | "phpunit",
48 | "phpcs -p"
49 | ]
50 | }
51 | }
52 |
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140 | "email": "rob.bast@gmail.com",
141 | "homepage": "http://robbast.nl"
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144 | "description": "SPDX licenses list and validation library.",
145 | "keywords": [
146 | "license",
147 | "spdx",
148 | "validator"
149 | ],
150 | "support": {
151 | "irc": "irc://irc.freenode.org/composer",
152 | "issues": "https://github.com/composer/spdx-licenses/issues",
153 | "source": "https://github.com/composer/spdx-licenses/tree/1.5.7"
154 | },
155 | "funding": [
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157 | "url": "https://packagist.com",
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172 | "name": "doctrine/instantiator",
173 | "version": "2.0.0",
174 | "source": {
175 | "type": "git",
176 | "url": "https://github.com/doctrine/instantiator.git",
177 | "reference": "c6222283fa3f4ac679f8b9ced9a4e23f163e80d0"
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182 | "reference": "c6222283fa3f4ac679f8b9ced9a4e23f163e80d0",
183 | "shasum": ""
184 | },
185 | "require": {
186 | "php": "^8.1"
187 | },
188 | "require-dev": {
189 | "doctrine/coding-standard": "^11",
190 | "ext-pdo": "*",
191 | "ext-phar": "*",
192 | "phpbench/phpbench": "^1.2",
193 | "phpstan/phpstan": "^1.9.4",
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195 | "phpunit/phpunit": "^9.5.27",
196 | "vimeo/psalm": "^5.4"
197 | },
198 | "type": "library",
199 | "autoload": {
200 | "psr-4": {
201 | "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
202 | }
203 | },
204 | "notification-url": "https://packagist.org/downloads/",
205 | "license": [
206 | "MIT"
207 | ],
208 | "authors": [
209 | {
210 | "name": "Marco Pivetta",
211 | "email": "ocramius@gmail.com",
212 | "homepage": "https://ocramius.github.io/"
213 | }
214 | ],
215 | "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
216 | "homepage": "https://www.doctrine-project.org/projects/instantiator.html",
217 | "keywords": [
218 | "constructor",
219 | "instantiate"
220 | ],
221 | "support": {
222 | "issues": "https://github.com/doctrine/instantiator/issues",
223 | "source": "https://github.com/doctrine/instantiator/tree/2.0.0"
224 | },
225 | "funding": [
226 | {
227 | "url": "https://www.doctrine-project.org/sponsorship.html",
228 | "type": "custom"
229 | },
230 | {
231 | "url": "https://www.patreon.com/phpdoctrine",
232 | "type": "patreon"
233 | },
234 | {
235 | "url": "https://tidelift.com/funding/github/packagist/doctrine%2Finstantiator",
236 | "type": "tidelift"
237 | }
238 | ],
239 | "time": "2022-12-30T00:23:10+00:00"
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1657 | "name": "Sebastian Bergmann",
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1767 | "name": "Sebastian Bergmann",
1768 | "email": "sebastian@phpunit.de"
1769 | },
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1771 | "name": "Jeff Welch",
1772 | "email": "whatthejeff@gmail.com"
1773 | },
1774 | {
1775 | "name": "Adam Harvey",
1776 | "email": "aharvey@php.net"
1777 | }
1778 | ],
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1780 | "homepage": "https://github.com/sebastianbergmann/recursion-context",
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1830 | "name": "Sebastian Bergmann",
1831 | "email": "sebastian@phpunit.de"
1832 | }
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1835 | "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
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1900 | }
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1930 | ]
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1933 | "license": [
1934 | "BSD-3-Clause"
1935 | ],
1936 | "authors": [
1937 | {
1938 | "name": "Sebastian Bergmann",
1939 | "email": "sebastian@phpunit.de",
1940 | "role": "lead"
1941 | }
1942 | ],
1943 | "description": "Library that helps with managing the version number of Git-hosted PHP projects",
1944 | "homepage": "https://github.com/sebastianbergmann/version",
1945 | "support": {
1946 | "issues": "https://github.com/sebastianbergmann/version/issues",
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1953 | }
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1957 | {
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1959 | "version": "3.6.2",
1960 | "source": {
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1962 | "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
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1974 | "ext-xmlwriter": "*",
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1976 | },
1977 | "require-dev": {
1978 | "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
1979 | },
1980 | "bin": [
1981 | "bin/phpcs",
1982 | "bin/phpcbf"
1983 | ],
1984 | "type": "library",
1985 | "extra": {
1986 | "branch-alias": {
1987 | "dev-master": "3.x-dev"
1988 | }
1989 | },
1990 | "notification-url": "https://packagist.org/downloads/",
1991 | "license": [
1992 | "BSD-3-Clause"
1993 | ],
1994 | "authors": [
1995 | {
1996 | "name": "Greg Sherwood",
1997 | "role": "lead"
1998 | }
1999 | ],
2000 | "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
2001 | "homepage": "https://github.com/squizlabs/PHP_CodeSniffer",
2002 | "keywords": [
2003 | "phpcs",
2004 | "standards"
2005 | ],
2006 | "support": {
2007 | "issues": "https://github.com/squizlabs/PHP_CodeSniffer/issues",
2008 | "source": "https://github.com/squizlabs/PHP_CodeSniffer",
2009 | "wiki": "https://github.com/squizlabs/PHP_CodeSniffer/wiki"
2010 | },
2011 | "time": "2021-12-12T21:44:58+00:00"
2012 | },
2013 | {
2014 | "name": "theseer/tokenizer",
2015 | "version": "1.2.1",
2016 | "source": {
2017 | "type": "git",
2018 | "url": "https://github.com/theseer/tokenizer.git",
2019 | "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e"
2020 | },
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2027 | "require": {
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2029 | "ext-tokenizer": "*",
2030 | "ext-xmlwriter": "*",
2031 | "php": "^7.2 || ^8.0"
2032 | },
2033 | "type": "library",
2034 | "autoload": {
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2036 | "src/"
2037 | ]
2038 | },
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2040 | "license": [
2041 | "BSD-3-Clause"
2042 | ],
2043 | "authors": [
2044 | {
2045 | "name": "Arne Blankerts",
2046 | "email": "arne@blankerts.de",
2047 | "role": "Developer"
2048 | }
2049 | ],
2050 | "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
2051 | "support": {
2052 | "issues": "https://github.com/theseer/tokenizer/issues",
2053 | "source": "https://github.com/theseer/tokenizer/tree/1.2.1"
2054 | },
2055 | "funding": [
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2057 | "url": "https://github.com/theseer",
2058 | "type": "github"
2059 | }
2060 | ],
2061 | "time": "2021-07-28T10:34:58+00:00"
2062 | }
2063 | ],
2064 | "aliases": [],
2065 | "minimum-stability": "stable",
2066 | "stability-flags": [],
2067 | "prefer-stable": false,
2068 | "prefer-lowest": false,
2069 | "platform": {
2070 | "ext-curl": "*",
2071 | "ext-intl": "*",
2072 | "lib-curl": ">=7.43.0",
2073 | "php": ">=7.3.0"
2074 | },
2075 | "platform-dev": [],
2076 | "plugin-api-version": "2.6.0"
2077 | }
2078 |
--------------------------------------------------------------------------------
/phpunit.xml.dist.bak:
--------------------------------------------------------------------------------
1 |
4 |
5 |
6 | ./tests
7 |
8 |
9 |
10 |
11 | ./src
12 |
13 |
14 |
15 |
--------------------------------------------------------------------------------
/src/CheckIfDead.php:
--------------------------------------------------------------------------------
1 | curlTimeoutNoBody = (int)$curlTimeoutNoBody;
135 | $this->curlTimeoutFull = (int)$curlTimeoutFull;
136 | $this->customUserAgent = $userAgent;
137 | $this->queuedTesting = (bool)$sequentialTests;
138 | $this->verbose = (bool)$verbose;
139 |
140 | self::$socks5Host = $socks5Host;
141 | if ( $socks5Port === false ) {
142 | // If we are using TOR defaults, check OS to determine which defaults to use.
143 | if ( substr( php_uname(), 0, 7 ) == "Windows" ) {
144 | self::$socks5Port = 9150;
145 | } else {
146 | self::$socks5Port = 9050;
147 | }
148 | } else {
149 | self::$socks5Port = $socks5Port;
150 | }
151 | }
152 |
153 | /**
154 | * Check if a single URL is dead by performing a curl request
155 | *
156 | * @param string $url URL to check
157 | * @return bool|null Returns null if curl is unable to initialize.
158 | * Otherwise returns true (dead) or false (alive).
159 | */
160 | public function isLinkDead( $url ) {
161 | $deadVal = $this->areLinksDead( [ $url ] );
162 | $deadVal = $deadVal[$url];
163 |
164 | return $deadVal;
165 | }
166 |
167 | /**
168 | * Check an array of links
169 | *
170 | * @param array $urls Array of URLs we are checking
171 | * @return array|null Returns null if curl is unable to initialize.
172 | * Otherwise returns an array in which each key is a URL and each value is
173 | * true (dead) or false (alive).
174 | */
175 | public function areLinksDead( $urls ) {
176 | // Run TOR check if not yet initialized
177 | if ( is_null( self::$torEnabled ) ) {
178 | // Check to see if we have an environment that supports TOR
179 | if ( $this->verbose ) {
180 | echo "Testing for TOR readiness...";
181 | }
182 | $testURL = "https://check.torproject.org";
183 | // Prepare test
184 | $ch = curl_init();
185 | // Get appropriate curl options
186 | $options = $this->getCurlOptions(
187 | $this->sanitizeURL( $testURL ),
188 | true,
189 | true
190 | );
191 | // Force Tor settings onto the options
192 | $options[CURLOPT_PROXY] = self::$socks5Host . ":" . self::$socks5Port;
193 | $options[CURLOPT_PROXYTYPE] = CURLPROXY_SOCKS5_HOSTNAME;
194 | $options[CURLOPT_HTTPPROXYTUNNEL] = true;
195 | curl_setopt_array(
196 | $ch,
197 | $options
198 | );
199 | $data = curl_exec( $ch );
200 | if ( strpos( $data, "This browser is configured to use Tor." ) !== false ) {
201 | self::$torEnabled = true;
202 | } else {
203 | self::$torEnabled = false;
204 | }
205 | curl_close( $ch );
206 | if ( $this->verbose ) {
207 | if ( self::$torEnabled ) {
208 | echo "Ready\n";
209 | echo "TOR requests can be made in this environment\n";
210 | } else {
211 | echo "Not ready\n";
212 | echo "TOR requests will be ignored\n";
213 | }
214 | }
215 | }
216 |
217 | // Create multiple curl handle
218 | $this->errors = [];
219 | $this->details = [];
220 | $multicurl_resource = curl_multi_init();
221 | if ( $multicurl_resource === false ) {
222 | return null;
223 | }
224 | $deadLinks = [];
225 | $this->queueRequests( $urls );
226 | if ( $this->verbose === true ) {
227 | if ( count( $this->curlQueue ) > 1 ) {
228 | echo "Delaying one or more links!\n";
229 | }
230 | }
231 | foreach ( $this->curlQueue as $urls ) {
232 | $curl_instances = [];
233 | // Array of URLs we want to send in for a full check
234 | $fullCheckURLs = [];
235 | // Maps the destination URL to the requested URL in case we followed a redirect
236 | $fullCheckURLMap = [];
237 | // Set HTTP version for full check URLs
238 | $httpVersions = [];
239 | foreach ( $urls as $id => $url ) {
240 | $requestType = $this->getRequestType( $this->sanitizeURL( $url ) );
241 | if ( !in_array( $requestType, [ "UNSUPPORTED", "BAD URL" ] ) ) {
242 | $curl_instances[$id] = curl_init();
243 | if ( $curl_instances[$id] === false ) {
244 | return null;
245 | }
246 | // Get appropriate curl options
247 | curl_setopt_array(
248 | $curl_instances[$id],
249 | $this->getCurlOptions( $this->sanitizeURL( $url ), false, $this->isOnion( $url ) )
250 | );
251 | // Add the instance handle
252 | curl_multi_add_handle( $multicurl_resource, $curl_instances[$id] );
253 | } elseif ( $this->verbose === true ) {
254 | if ( $requestType == "UNSUPPORTED" ) echo "$url is not supported!\n";
255 | else echo "$url is malformed!\n";
256 | }
257 | if ( $requestType == "BAD URL" ) {
258 | $deadLinks[$url] = true;
259 | $this->errors[$url] = "MALFORMED URL";
260 | $this->details[$url] = null;
261 | }
262 | }
263 | // Let's do the curl operations
264 | $active = null;
265 | do {
266 | $mrc = curl_multi_exec( $multicurl_resource, $active );
267 | } while ( $mrc == CURLM_CALL_MULTI_PERFORM );
268 | while ( $active && $mrc == CURLM_OK ) {
269 | if ( curl_multi_select( $multicurl_resource ) == -1 ) {
270 | // To prevent CPU spike
271 | usleep( 100 );
272 | }
273 | do {
274 | $mrc = curl_multi_exec( $multicurl_resource, $active );
275 | } while ( $mrc == CURLM_CALL_MULTI_PERFORM );
276 | }
277 | // Let's process our curl results and extract the useful information
278 | foreach ( $urls as $id => $url ) {
279 | if ( isset( $curl_instances[$id] ) ) {
280 | $this->details[$url] = $headers = curl_getinfo( $curl_instances[$id] );
281 | $error = curl_errno( $curl_instances[$id] );
282 | $errormsg = curl_error( $curl_instances[$id] );
283 | $curlInfo = [
284 | 'http_code' => $headers['http_code'],
285 | 'effective_url' => $headers['url'],
286 | 'curl_error' => $error,
287 | 'curl_error_msg' => $errormsg,
288 | 'url' => $this->sanitizeURL( $url ),
289 | 'rawurl' => $url,
290 | 'http_version' => curl_getinfo( $curl_instances[$id], CURLINFO_HTTP_VERSION )
291 | ];
292 | if ( isset( $headers['total_time_us'] ) ) {
293 | $curlInfo['exec_time'] = $headers['total_time_us'];
294 | } elseif ( isset( $headers['total_time'] ) ) {
295 | $curlInfo['exec_time'] = $headers['total_time'] * 1000000;
296 | } else {
297 | $curlInfo['exec_time'] = 1000000;
298 | }
299 | // Remove each of the individual handles
300 | curl_multi_remove_handle( $multicurl_resource, $curl_instances[$id] );
301 | $curl_instances[$id] = null;
302 | // Deduce whether the site is dead or alive
303 | $deadLinks[$url] = $this->processCurlResults( $curlInfo );
304 | if ( $this->verbose === true ) {
305 | if ( $deadLinks[$url] === true ) {
306 | echo "$url is DEAD!\n";
307 | }
308 | if ( $deadLinks[$url] === false ) {
309 | echo "$url is ALIVE!\n";
310 | }
311 | }
312 | // If we got back a null, we should do a full page request
313 | if ( is_null( $deadLinks[$url] ) ) {
314 | $fullCheckURLs[] = $curlInfo['url'];
315 | $httpVersions[] = $curlInfo['http_version'];
316 | if ( $url != $curlInfo['url'] ) {
317 | $fullCheckURLMap[$url] = $curlInfo['url'];
318 | }
319 | }
320 | } else {
321 | if ( !isset( $deadLinks[$url] ) ) $deadLinks[$url] = null;
322 | if ( $this->verbose === true ) {
323 | echo "Something went wrong with $url!\n";
324 | }
325 | }
326 | }
327 | // Do full page requests for URLs that returned null
328 | if ( !empty( $fullCheckURLs ) ) {
329 | if ( $this->verbose === true ) {
330 | echo "Running a full check on:\n";
331 | foreach ( $fullCheckURLs as $url ) {
332 | echo "\t$url\n";
333 | }
334 | }
335 | $results = $this->performFullRequest( $fullCheckURLs, $httpVersions );
336 | if ( $this->verbose === true ) {
337 | foreach ( $results as $url => $result ) {
338 | if ( $result === true ) {
339 | echo "$url is DEAD!\n";
340 | }
341 | if ( $result === false ) {
342 | echo "$url is ALIVE!\n";
343 | }
344 | }
345 | }
346 | // Merge back results from full requests into our deadlinks array
347 | $deadLinks = array_merge( $deadLinks, $results );
348 | // Use map to change destination URL back to the requested URL
349 | foreach ( $fullCheckURLMap as $requested => $destination ) {
350 | $deadLinks[$requested] = $deadLinks[$destination];
351 | $this->details[$requested] = $this->details[$destination];
352 | $this->snapshots[$requested] = $this->snapshots[$destination];
353 | if ( isset( $this->errors[$destination] ) ) {
354 | $this->errors[$requested] = $this->errors[$destination];
355 | unset( $this->errors[$destination] );
356 | }
357 | unset (
358 | $deadLinks[$destination],
359 | $this->details[$destination],
360 | $this->snapshots[$destination] );
361 | }
362 | }
363 | if ( count( $this->curlQueue ) > 1 ) {
364 | sleep( 1 );
365 | }
366 | }
367 | // Close resource
368 | curl_multi_close( $multicurl_resource );
369 |
370 | return $deadLinks;
371 | }
372 |
373 | /**
374 | * Perform a complete text request, not just for headers
375 | *
376 | * @param array $urls URLs we are checking
377 | * @return array with params 'error':curl error number and
378 | * 'result':true(dead)/false(alive) for each element
379 | */
380 | protected function performFullRequest( $urls, $httpVersions ) {
381 | // Create multiple curl handle
382 | $multicurl_resource = curl_multi_init();
383 | if ( $multicurl_resource === false ) {
384 | return false;
385 | }
386 | $curl_instances = [];
387 | $deadlinks = [];
388 | foreach ( $urls as $id => $url ) {
389 | $curl_instances[$id] = curl_init();
390 | if ( $curl_instances[$id] === false ) {
391 | return false;
392 | }
393 | // Get appropriate curl options
394 | curl_setopt_array(
395 | $curl_instances[$id],
396 | $this->getCurlOptions(
397 | $this->sanitizeURL( $url, false, true ),
398 | true,
399 | $this->isOnion( $url ), $httpVersions[$id]
400 | )
401 | );
402 | // Add the instance handle
403 | curl_multi_add_handle( $multicurl_resource, $curl_instances[$id] );
404 | }
405 | // Let's do the CURL operations
406 | $active = null;
407 | do {
408 | $mrc = curl_multi_exec( $multicurl_resource, $active );
409 | } while ( $mrc == CURLM_CALL_MULTI_PERFORM );
410 | while ( $active && $mrc == CURLM_OK ) {
411 | if ( curl_multi_select( $multicurl_resource ) == -1 ) {
412 | // To prevent CPU spike
413 | usleep( 100 );
414 | }
415 | do {
416 | $mrc = curl_multi_exec( $multicurl_resource, $active );
417 | } while ( $mrc == CURLM_CALL_MULTI_PERFORM );
418 | }
419 | // Let's process our curl results and extract the useful information
420 | foreach ( $urls as $id => $url ) {
421 | $this->details[$url] = $headers = curl_getinfo( $curl_instances[$id] );
422 | $this->snapshots[$url] = curl_multi_getcontent( $curl_instances[$id] );
423 | $error = curl_errno( $curl_instances[$id] );
424 | $errormsg = curl_error( $curl_instances[$id] );
425 | $curlInfo = [
426 | 'http_code' => $headers['http_code'],
427 | 'effective_url' => $headers['url'],
428 | 'curl_error' => $error,
429 | 'curl_error_msg' => $errormsg,
430 | 'url' => $this->sanitizeURL( $url ),
431 | 'rawurl' => $url,
432 | 'http_version' => curl_getinfo( $curl_instances[$id], CURLINFO_HTTP_VERSION )
433 | ];
434 | if ( isset( $headers['total_time_us'] ) ) {
435 | $curlInfo['exec_time'] = $headers['total_time_us'];
436 | } elseif ( isset( $headers['total_time'] ) ) {
437 | $curlInfo['exec_time'] = $headers['total_time'] * 1000000;
438 | } else {
439 | $curlInfo['exec_time'] = 1000000;
440 | }
441 | // Remove each of the individual handles
442 | curl_multi_remove_handle( $multicurl_resource, $curl_instances[$id] );
443 | $deadlinks[$url] = $this->processCurlResults( $curlInfo, true );
444 | }
445 | // Close resource
446 | curl_multi_close( $multicurl_resource );
447 |
448 | return $deadlinks;
449 | }
450 |
451 | /**
452 | * Queue up the URLs creating time-delays between URLs with the same domain.
453 | *
454 | * @param array $urls All the URLs being tested
455 | */
456 | protected function queueRequests( $urls ) {
457 | $this->curlQueue = [];
458 | if ( $this->queuedTesting === false ) {
459 | $this->curlQueue[] = $urls;
460 |
461 | return;
462 | }
463 | foreach ( $urls as $url ) {
464 | $parsedParts = $this->parseURL( $url );
465 | if ( $parsedParts === false ) {
466 | $parsedParts = [];
467 | $parsedParts['host'] = "empty";
468 | }
469 | $domain = $parsedParts['host'];
470 | $queuedUrl = false;
471 | $queueIndex = -1;
472 | foreach ( $this->curlQueue as $queueIndex => $urlList ) {
473 | if ( $queuedUrl === false && !isset( $urlList[$domain] ) ) {
474 | $this->curlQueue[$queueIndex][$domain] = $url;
475 | $queuedUrl = true;
476 | }
477 | }
478 | if ( $queuedUrl === false ) {
479 | $this->curlQueue[++$queueIndex][$domain] = $url;
480 | }
481 | }
482 | }
483 |
484 | /**
485 | * Get CURL options
486 | *
487 | * @param $url String URL we are testing against
488 | * @param bool $full Is this a request for the full page?
489 | * @param bool $tor Is this request being routed through TOR?
490 | * @return array Options for curl
491 | */
492 | protected function getCurlOptions( $url, $full = false, $tor = false, $httpVersion = CURL_HTTP_VERSION_NONE ) {
493 | $requestType = $this->getRequestType( $url );
494 | if ( $requestType == "MMS" ) {
495 | $url = str_ireplace( "mms://", "rtsp://", $url );
496 | }
497 | $options = [
498 | CURLOPT_URL => $url,
499 | CURLOPT_HEADER => 1,
500 | CURLOPT_RETURNTRANSFER => true,
501 | CURLOPT_AUTOREFERER => true,
502 | CURLOPT_FOLLOWLOCATION => true,
503 | CURLOPT_TIMEOUT => $this->curlTimeoutNoBody,
504 | CURLOPT_SSL_VERIFYPEER => false,
505 | CURLOPT_COOKIEJAR => sys_get_temp_dir() . "checkifdead.cookies.dat",
506 | CURLOPT_HTTP_VERSION => $httpVersion,
507 | CURLINFO_HEADER_OUT => 1
508 | ];
509 | if ( $requestType == "RTSP" || $requestType == "MMS" ) {
510 | $header = [];
511 | $options[CURLOPT_USERAGENT] = $this->mediaAgent;
512 | } elseif ( $requestType != "FTP" ) {
513 | // Properly handle HTTP version
514 | // Emulate a web browser request but make it accept more than a web browser
515 | if ( in_array( $httpVersion, [ CURL_HTTP_VERSION_1_0, CURL_HTTP_VERSION_1_1, CURL_HTTP_VERSION_NONE ] ) ) {
516 | $header = [
517 | // @codingStandardsIgnoreStart Line exceeds 100 characters
518 | 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
519 | // @codingStandardsIgnoreEnd
520 | 'Upgrade-Insecure-Requests: 1',
521 | 'Cache-Control: max-age=0',
522 | 'Connection: keep-alive',
523 | 'Keep-Alive: 300',
524 | 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7',
525 | 'Accept-Language: en-US,en;q=0.9,de;q=0.8',
526 | 'Pragma: '
527 | ];
528 | } elseif ( in_array( $httpVersion, [ CURL_HTTP_VERSION_2, CURL_HTTP_VERSION_2_0, CURL_HTTP_VERSION_2_PRIOR_KNOWLEDGE, CURL_HTTP_VERSION_2TLS ] ) ) {
529 | $header = [
530 | // @codingStandardsIgnoreStart Line exceeds 100 characters
531 | 'accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
532 | // @codingStandardsIgnoreEnd
533 | 'upgrade-insecure-requests: 1',
534 | 'cache-control: max-age=0',
535 | 'connection: keep-alive',
536 | 'keep-alive: 300',
537 | 'accept-charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7',
538 | 'accept-language: en-US,en;q=0.9,de;q=0.8',
539 | 'dnt: 1'
540 | ];
541 | if ( $requestType == "HTTPS" ) {
542 | $header[] = 'sec-ch-ua: "Google Chrome";v="105", "Not)A;Brand";v="8", "Chromium";v="105"';
543 | $header[] = 'sec-ch-ua-mobile: ?0';
544 | $header[] = 'sec-ch-ua-platform: "' . $this->getRequestPlatform() . '"';
545 | $header[] = 'sec-fetch-dest: document';
546 | $header[] = 'sec-fetch-mode: navigate';
547 | $header[] = 'sec-fetch-site: none';
548 | $header[] = 'sec-fetch-user: ?1';
549 | }
550 | }
551 | if ( $this->customUserAgent === false ) {
552 | $options[CURLOPT_USERAGENT] = $this->userAgent;
553 | } else {
554 | $options[CURLOPT_USERAGENT] = $this->customUserAgent;
555 | }
556 | }
557 | if ( $requestType == 'FTP' ) {
558 | $options[CURLOPT_FTP_USE_EPRT] = 1;
559 | $options[CURLOPT_FTP_USE_EPSV] = 1;
560 | $options[CURLOPT_FTPSSLAUTH] = CURLFTPAUTH_DEFAULT;
561 | $options[CURLOPT_FTP_FILEMETHOD] = CURLFTPMETHOD_SINGLECWD;
562 | if ( $full ) {
563 | // Set CURLOPT_USERPWD for anonymous FTP login
564 | $options[CURLOPT_USERPWD] = "anonymous:anonymous@domain.com";
565 | }
566 | } elseif ( $full ) {
567 | // Extend timeout since we are requesting the full body
568 | $options[CURLOPT_TIMEOUT] = $this->curlTimeoutFull;
569 | $options[CURLOPT_HTTPHEADER] = $header;
570 | if ( $requestType != "MMS" && $requestType != "RTSP" ) {
571 | $options[CURLOPT_ENCODING] = 'gzip, deflate, br';
572 | }
573 | $options[CURLOPT_USERAGENT] = $this->userAgent;
574 | } else {
575 | $options[CURLOPT_NOBODY] = 1;
576 | }
577 | if ( $tor && self::$torEnabled ) {
578 | $options[CURLOPT_PROXY] = self::$socks5Host . ":" . self::$socks5Port;
579 | $options[CURLOPT_PROXYTYPE] = CURLPROXY_SOCKS5_HOSTNAME;
580 | $options[CURLOPT_HTTPPROXYTUNNEL] = true;
581 | } else {
582 | $options[CURLOPT_PROXYTYPE] = CURLPROXY_HTTP;
583 | }
584 |
585 | return $options;
586 | }
587 |
588 | /**
589 | * Get platform
590 | *
591 | * @return string "Android", "Chrome OS", "Chromium OS", "iOS", "Linux", "macOS", "Windows", or "Unknown"
592 | */
593 | protected function getRequestPlatform() {
594 | switch ( PHP_OS ) {
595 | case "WINNT":
596 | case "Windows_NT":
597 | case "CYGWIN_NT-5.1":
598 | case "CYGWIN_NT-6.1":
599 | case "CYGWIN_NT-6.1-WOW64":
600 | case "CYGWIN_NT-10.0":
601 | case "MINGW32_NT-6.1":
602 | case "MINGW64_NT-6.1":
603 | case "MSYS_NT-6.1":
604 | case "MSYS_NT-6.1":
605 | case "MS-DOS":
606 | case "WindowsNT":
607 | case "UWIN-W7":
608 | return "Windows";
609 | case "GNU":
610 | case "GNU/kFreeBSD":
611 | case "DragonFly":
612 | case "Linux":
613 | case "FreeBSD":
614 | case "HP-UX":
615 | case "AIX":
616 | case "Interix":
617 | case "IRIX":
618 | case "IRIX64":
619 | case "MidnightBSD":
620 | case "Minix":
621 | case "NetBSD":
622 | case "OpenBSD":
623 | case "QNX":
624 | case "ReliantUNIX-Y":
625 | case "SINIX-Y":
626 | case "SunOS":
627 | case "OSF1":
628 | case "ULTRIX":
629 | case "SCO_SV":
630 | case "TrueNAS":
631 | case "FreeNAS":
632 | case "UnixWare":
633 | return "Linux";
634 | case "Darwin":
635 | return "macOS";
636 | default:
637 | return "Unknown";
638 | }
639 | }
640 |
641 | /**
642 | * Get request type
643 | *
644 | * @param $url String URL we are checking against
645 | * @return string "FTP", "MMS", "RTSP", "HTTP", or "UNSUPPORTED"
646 | */
647 | protected function getRequestType( $url ) {
648 | if ( $this->isOnion( $url ) && !self::$torEnabled ) {
649 | return "UNSUPPORTED";
650 | }
651 |
652 | if ( $url === false ) {
653 | return "BAD URL";
654 | }
655 |
656 | switch ( strtolower( parse_url( $url, PHP_URL_SCHEME ) ) ) {
657 | case "ftp":
658 | return "FTP";
659 | case "mms":
660 | return "MMS";
661 | case "rtsp":
662 | return "RTSP";
663 | case "http":
664 | return "HTTP";
665 | case "https":
666 | return "HTTPS";
667 | case "":
668 | return "BAD URL";
669 | default:
670 | return "UNSUPPORTED";
671 | }
672 | }
673 |
674 | /**
675 | * Check if TOR is needed to access url
676 | *
677 | * @param $url String URL we are checking against
678 | * @return bool True if it's an Onion URL
679 | */
680 | protected function isOnion( $url ) {
681 | if ( $url === false ) {
682 | return false;
683 | }
684 |
685 | $domain = strtolower( parse_url( $url, PHP_URL_HOST ) );
686 | if ( substr( $domain, -6 ) == ".onion" ) {
687 | return true;
688 | } else {
689 | return false;
690 | }
691 | }
692 |
693 | /**
694 | * Process the returned headers
695 | *
696 | * @param array $curlInfo Array with values: returned headers, error number, URL checked for
697 | * @param bool $full Was this a request for the full page?
698 | * @return bool|null Returns true if dead, false if alive, null if uncertain
699 | */
700 | protected function processCurlResults( $curlInfo, $full = false, $httpVersion = CURL_HTTP_VERSION_NONE ) {
701 | // Determine if we are using FTP or HTTP
702 | $requestType = $this->getRequestType( $curlInfo['url'] );
703 | // Get HTTP code returned
704 | $httpCode = $curlInfo['http_code'];
705 | // Get final URL
706 | $effectiveUrl = $curlInfo['effective_url'];
707 | // Clean final url, removing scheme, 'www', and trailing slash
708 | $effectiveUrlClean = $this->cleanURL( $effectiveUrl );
709 | // Get an array of possible root urls
710 | $possibleRoots = $this->getDomainRoots( $curlInfo['url'] );
711 | // Let's check and see if we are HTTP version mismatched
712 | $httpVersionMismatch = $httpVersion != $curlInfo['http_version'];
713 | if ( $httpCode >= 400 && $httpCode < 600 ) {
714 | if ( $full ) {
715 | $this->errors[$curlInfo['rawurl']] = "RESPONSE CODE: $httpCode";
716 |
717 | return true;
718 | } else {
719 | // Some servers don't support NOBODY requests, so if an HTTP error code
720 | // is returned, we'll check the URL again with a full page request.
721 | return null;
722 | }
723 | }
724 | // Check for error messages in redirected URL string
725 | if ( strpos( $effectiveUrlClean, '/404.htm' ) !== false ||
726 | strpos( $effectiveUrlClean, '/404/' ) !== false ||
727 | stripos( $effectiveUrlClean, 'notfound' ) !== false
728 | ) {
729 | if ( $full ) {
730 | $this->errors[$curlInfo['rawurl']] = "REDIRECT TO 404";
731 |
732 | return true;
733 | } else {
734 | // Some servers don't support NOBODY requests, so if redirect to a 404 page
735 | // is returned, we'll check the URL again with a full page request.
736 | return null;
737 | }
738 | }
739 | // Check if there was a redirect by comparing final URL with original URL
740 | if ( $effectiveUrlClean != $this->cleanURL( $curlInfo['url'] ) ) {
741 | // Check against possible roots
742 | foreach ( $possibleRoots as $root ) {
743 | // We found a match with final url and a possible root url
744 | if ( $root == $effectiveUrlClean ) {
745 | $this->errors[$curlInfo['rawurl']] = "REDIRECT TO ROOT";
746 | if ( !$httpVersionMismatch && !$full ) return true;
747 | else return null;
748 | }
749 | }
750 | }
751 | // If there was an error during the CURL process, check if the code
752 | // returned is a server side problem
753 | if ( in_array( $curlInfo['curl_error'], $this->curlErrorCodes ) ) {
754 | $this->errors[$curlInfo['rawurl']] =
755 | "Curl Error {$curlInfo['curl_error']}: {$curlInfo['curl_error_msg']}";
756 |
757 | return true;
758 | }
759 | if ( $httpCode === 0 ) {
760 | if ( $full ) {
761 | $this->errors[$curlInfo['rawurl']] = "NO RESPONSE FROM SERVER";
762 | $this->errors[$curlInfo['rawurl']] .= " - Curl Error {$curlInfo['curl_error']}: {$curlInfo['curl_error_msg']}";
763 | $this->errors[$curlInfo['rawurl']] .= " - Failed after {$curlInfo['exec_time']} us";
764 | if ( $curlInfo['exec_time'] >= 1000 ) {
765 | return true;
766 | } else {
767 | $this->errors[$curlInfo['rawurl']] = "NO RESPONSE FROM SERVER - POTENTIAL FALSE POSITIVE";
768 |
769 | return null;
770 | }
771 | } else {
772 | // Some servers don't support NOBODY requests, so if redirect to a 404 page
773 | // is returned, we'll check the URL again with a full page request.
774 | return null;
775 | }
776 | }
777 | // Check for valid non-error codes for HTTP or FTP
778 | if ( $requestType != "FTP" && !in_array( $httpCode, $this->goodHttpCodes ) ) {
779 | $this->errors[$curlInfo['rawurl']] = "HTTP RESPONSE CODE: $httpCode";
780 | if ( !$httpVersionMismatch && !$full ) return true;
781 | else return null;
782 | // Check for valid non-error codes for FTP
783 | } elseif ( $requestType == "FTP" && !in_array( $httpCode, $this->goodFtpCodes ) ) {
784 | $this->errors[$curlInfo['rawurl']] = "FTP RESPONSE CODE: $httpCode";
785 | if ( !$httpVersionMismatch && !$full ) return true;
786 | else return null;
787 | }
788 |
789 | // Yay, the checks passed, and the site is alive.
790 | return false;
791 | }
792 |
793 | /**
794 | * Compile an array of "possible" root URLs. With subdomain, without subdomain etc.
795 | *
796 | * @param string $url Initial url
797 | * @return array Possible root domains (strings)
798 | */
799 | protected function getDomainRoots( $url ) {
800 | $roots = [];
801 | $pieces = parse_url( $url );
802 | if ( !isset( $pieces['host'], $pieces['host'] ) ) {
803 | return [];
804 | }
805 | $roots[] = $pieces['host'];
806 | $roots[] = $pieces['host'] . '/';
807 | $domain = isset( $pieces['host'] ) ? $pieces['host'] : '';
808 | if ( preg_match( '/(?P[a-z0-9][a-z0-9\-]{1,63}\.[a-z.]{2,6})$/i', $domain, $regs ) ) {
809 | $roots[] = $regs['domain'];
810 | $roots[] = $regs['domain'] . '/';
811 | }
812 | $parts = explode( '.', $pieces['host'] );
813 | if ( count( $parts ) >= 3 ) {
814 | $roots[] = implode( '.', array_slice( $parts, -2 ) );
815 | $roots[] = implode( '.', array_slice( $parts, -2 ) ) . '/';
816 | }
817 |
818 | return $roots;
819 | }
820 |
821 | /**
822 | * Properly encode the URL to ensure the receiving webservice understands the request.
823 | *
824 | * @param string $url URL to sanitize
825 | * @param bool $stripFragment Remove the fragment from the URL.
826 | * @param bool $preserveQueryEncoding Preserve the whitespace encoding of query strings.
827 | * @return string sanitized URL
828 | */
829 | public function sanitizeURL( $url, $stripFragment = false, $preserveQueryEncoding = false ) {
830 | // The domain is easily decoded by the DNS handler,
831 | // but the path is what's seen by the respective webservice.
832 | // We need to encode it as some
833 | // can't handle decoded characters.
834 | // Break up the URL first
835 | $parts = $this->parseURL( $url );
836 | // Some rare URLs don't like it when %20 is passed in the query and require the +.
837 | // %20 is the most common usage to represent a whitespace in the query.
838 | // So convert them to unique values that will survive the encoding/decoding process.
839 | if ( $parts === false ) return false;
840 | if ( $preserveQueryEncoding === true && isset( $parts['query'] ) ) {
841 | $parts['query'] = str_replace( "%20", "CHECKIFDEADHEXSPACE", $parts['query'] );
842 | }
843 | // In case the protocol is missing, assume it goes to HTTPS
844 | if ( !isset( $parts['scheme'] ) ) {
845 | $url = "https";
846 | } else {
847 | $url = strtolower( $parts['scheme'] );
848 | }
849 | // Move on to the domain
850 | $url .= "://";
851 | // Add username and password if present
852 | if ( isset( $parts['user'] ) ) {
853 | $url .= $parts['user'];
854 | if ( isset( $parts['pass'] ) ) {
855 | $url .= ":" . $parts['pass'];
856 | }
857 | $url .= "@";
858 | }
859 | // Add host
860 | if ( isset( $parts['host'] ) ) {
861 | // Properly encode the host. It can't be UTF-8.
862 | // See https://en.wikipedia.org/wiki/Internationalized_domain_name.
863 | if ( function_exists( 'idn_to_ascii' ) ) {
864 | $url .= strtolower( idn_to_ascii( $parts['host'], IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46 ) );
865 | } else {
866 | $url .= strtolower( $parts['host'] );
867 | }
868 | if ( isset( $parts['port'] ) ) {
869 | // Ports are only needed if not using the defaults for the scheme.
870 | // Remove port numbers if they are the default.
871 | switch ( $parts['port'] ) {
872 | case 80:
873 | if ( isset( $parts['scheme'] ) &&
874 | strtolower( $parts['scheme'] ) == "http"
875 | ) {
876 | break;
877 | }
878 | case 443:
879 | if ( !isset( $parts['scheme'] ) ||
880 | strtolower( $parts['scheme'] ) == "https"
881 | ) {
882 | break;
883 | }
884 | case 21:
885 | if ( isset( $parts['scheme'] ) &&
886 | strtolower( $parts['scheme'] ) == "ftp"
887 | ) {
888 | break;
889 | }
890 | case 554:
891 | if ( isset( $parts['scheme'] ) &&
892 | strtolower( $parts['scheme'] ) == "rtsp"
893 | ) {
894 | break;
895 | }
896 | default:
897 | $url .= ":" . $parts['port'];
898 | }
899 | }
900 | }
901 | // Make sure path, query, and fragment are properly encoded, and not over-encoded.
902 | // This avoids possible 400 Bad Response errors.
903 | $url .= "/";
904 | if ( isset( $parts['path'] ) && strlen( $parts['path'] ) > 1 ) {
905 | // There are legal characters that do not need encoding in the path
906 | // and some webservers cannot handle these being encoded
907 | // If we only have legal characters, we can skip sanitizing the path
908 | $legalRegex = '/[^0-9a-zA-Z$\-\_\.\+\!\*\(\)\,\~\:\/\[\]\@\;\=\%]/';
909 | if ( preg_match( $legalRegex, $parts['path'] ) ) {
910 | // Pluses in the path are legal characters that do not need to be encoded.
911 | // Some URLs don't like the plus encoded.
912 | $parts['path'] = str_replace( "+", "CHECKIFDEADPLUSSPACE", $parts['path'] );
913 | $url .= implode( '/',
914 | array_map( "rawurlencode",
915 | explode( '/',
916 | substr(
917 | rawurldecode( $parts['path'] ), 1
918 | )
919 | )
920 | )
921 | );
922 | } else {
923 | $url .= substr( $parts['path'], 1 );
924 | }
925 | }
926 | if ( isset( $parts['query'] ) ) {
927 | $url .= "?";
928 | // There are legal characters that do not need encoding in the query
929 | // and some webservers cannot handle these being encoded
930 | // If we only have legal characters, we can skip sanitizing the query
931 | $legalRegex = '/[^0-9a-zA-Z$\-\_\.\+\!\*\(\)\,\~\:\[\]\@\;\&\=\%\/]/';
932 | if ( preg_match( $legalRegex, $parts['query'] ) ) {
933 | // Encoding the + means a literal plus in the query.
934 | // A plus means a space otherwise.
935 | $parts['query'] = str_replace( "+", "CHECKIFDEADPLUSSPACE", $parts['query'] );
936 | // We have a query string, all queries start with a ?
937 | // Break apart the query string. Separate them into all of the arguments passed.
938 | $parts['query'] = preg_split('/[&;]/', $parts['query']);
939 | // We need to encode each argument
940 | foreach ( $parts['query'] as $index => $argument ) {
941 | // Make sure we don't inadvertently encode the first instance of "="
942 | // Otherwise we break the query.
943 | $parts['query'][$index] = implode( '=',
944 | array_map( "rawurlencode",
945 | array_map( "urldecode",
946 | explode( '=', $parts['query'][$index], 2 )
947 | )
948 | )
949 | );
950 | }
951 | // Put the query string back together.
952 | $parts['query'] = implode( '&', $parts['query'] );
953 | $url .= $parts['query'];
954 | } else {
955 | $url .= $parts['query'];
956 | }
957 | }
958 | if ( $stripFragment === false && isset( $parts['fragment'] ) ) {
959 | // We don't need to encode the fragment, that's handled client side anyways.
960 | $url .= "#" . $parts['fragment'];
961 | }
962 | $url = str_replace( "CHECKIFDEADPLUSSPACE", "+", $url );
963 | // Convert our identifiers back into URL elements.
964 | if ( $preserveQueryEncoding === true ) {
965 | $url = str_replace( "CHECKIFDEADHEXSPACE", "%20", $url );
966 | }
967 |
968 | return $url;
969 | }
970 |
971 | /**
972 | * Custom parse_url function to support UTF-8 URLs
973 | *
974 | * @param string $url The URL to parse
975 | * @return mixed False on failure, array on success. For example:
976 | * array( 'scheme' => 'https', 'host' => 'hello.com', 'path' => '/en/' ) )
977 | */
978 | public function parseURL( $url ) {
979 | // Feeding fully encoded URLs will not work. So let's detect and decode if needed first.
980 | // This is just idiot proofing.
981 | // See if the URL is fully encoded by checking if the :// is encoded.
982 | // This prevents URLs where double encoded values aren't mistakenly decoded breaking the URL.
983 | if ( preg_match( '/^([a-z0-9+\-.]*)(?:%3A%2F%2F|%3A\/\/|:%2F%2F)/i', $url ) ) {
984 | // First let's break the fragment out to prevent accidentally mistaking a decoded %23 as a #
985 | $fragment = parse_url( $url, PHP_URL_FRAGMENT );
986 | if ( !is_null( $fragment ) ) {
987 | $url = strstr( $url, "#", true );
988 | }
989 | // Decode URL
990 | $url = rawurldecode( $url );
991 | // Re-encode the remaining #'s
992 | $url = str_replace( "#", "%23", $url );
993 | // Reattach the fragment
994 | if ( !is_null( $fragment ) ) {
995 | $url .= "#$fragment";
996 | }
997 | }
998 | // Sometimes the scheme is followed by a single slash instead of a double.
999 | // Web browsers and archives support this, so we should too.
1000 | if ( preg_match( '/^([a-z0-9+\-.]*:)?\/([^\/].+)/i', $url, $match ) ) {
1001 | $url = $match[1] . "//" . $match[2];
1002 | }
1003 | // Sometimes protocol relative URLs are not formatted correctly
1004 | // This checks to see if the URL starts with :/ or ://
1005 | // We will assume http in these cases
1006 | if ( preg_match( '/^:\/\/?([^\/].+)/i', $url, $match ) ) {
1007 | $url = "http://" . $match[1];
1008 | }
1009 | // If we're missing the scheme and double slashes entirely, assume http.
1010 | // The parse_url function fails without this
1011 | if ( !preg_match( '/(?:[a-z0-9+\-.]*:)?\/\//i', $url ) ) {
1012 | $url = "http://" . $url;
1013 | }
1014 | $encodedUrl = preg_replace_callback(
1015 | '%[^:/@?&=#;]+%sD',
1016 | function ( $matches ) {
1017 | return urlencode( $matches[0] );
1018 | },
1019 | $url
1020 | );
1021 | $parts = parse_url( $encodedUrl );
1022 | // Check if the URL was actually parsed.
1023 | if ( $parts !== false ) {
1024 | foreach ( $parts as $name => $value ) {
1025 | $parts[$name] = urldecode( $value );
1026 | }
1027 | }
1028 |
1029 | return $parts;
1030 | }
1031 |
1032 | /**
1033 | * Remove scheme, 'www', URL fragment, leading forward slashes and trailing slash
1034 | *
1035 | * @param string $input
1036 | * @return string Cleaned url string
1037 | */
1038 | public function cleanURL( $input ) {
1039 | // scheme and www
1040 | $url = preg_replace( '/^((https?:|ftp:)?(\/\/))?(www\.)?/', '', $input );
1041 | // fragment
1042 | $url = preg_replace( '/#.*/', '', $url );
1043 | // trailing slash
1044 | $url = preg_replace( '{/$}', '', $url );
1045 |
1046 | return $url;
1047 | }
1048 |
1049 | /**
1050 | * Returns the errors encountered on URLs that resulted in a dead response
1051 | *
1052 | * @return array All the errors indexed by URL.
1053 | */
1054 | public function getErrors() {
1055 | return $this->errors;
1056 | }
1057 |
1058 | /**
1059 | * Returns all of the data collected during the curl request.
1060 | *
1061 | * @return array All curl statistics gathered during the request.
1062 | */
1063 | public function getRequestDetails() {
1064 | return $this->details;
1065 | }
1066 |
1067 | /**
1068 | * Returns all of the snapshots collected during the curl request.
1069 | *
1070 | * @return array All page snapshots gathered during the request.
1071 | */
1072 | public function getRequestSnapshots() {
1073 | return $this->snapshots;
1074 | }
1075 |
1076 | /**
1077 | * Returns the status of TOR readiness
1078 | *
1079 | * @return bool False if the environment doesn't support TOR
1080 | */
1081 | public static function isTorEnabled() {
1082 | return self::$torEnabled;
1083 | }
1084 | }
1085 |
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