Edit File: UrlAutolinkParser.php
<?php declare(strict_types=1); /* * This file is part of the league/commonmark package. * * (c) Colin O'Dell <colinodell@gmail.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace League\CommonMark\Extension\Autolink; use League\CommonMark\Extension\CommonMark\Node\Inline\Link; use League\CommonMark\Parser\Inline\InlineParserInterface; use League\CommonMark\Parser\Inline\InlineParserMatch; use League\CommonMark\Parser\InlineParserContext; final class UrlAutolinkParser implements InlineParserInterface { private const ALLOWED_AFTER = [null, ' ', "\t", "\n", "\x0b", "\x0c", "\x0d", '*', '_', '~', '(']; // RegEx adapted from https://github.com/symfony/symfony/blob/6.3/src/Symfony/Component/Validator/Constraints/UrlValidator.php private const REGEX = '~ ( # Must start with a supported scheme + auth, or "www" (?: (?:%s):// # protocol (?:(?:(?:[\_\.\pL\pN-]|%%[0-9A-Fa-f]{2})+:)?((?:[\_\.\pL\pN-]|%%[0-9A-Fa-f]{2})+)@)? # basic auth |www\.) (?: (?: (?:xn--[a-z0-9-]++\.)*+xn--[a-z0-9-]++ # a domain name using punycode | (?:[\pL\pN\pS\pM\-\_]++\.){1,127}[\pL\pN\pM]++ # a multi-level domain name; total length must be 253 bytes or less | [a-z0-9\-\_]++ # a single-level domain name )\.? | # or \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} # an IP address | # or \[ (?:(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){6})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:::(?:(?:(?:[0-9a-f]{1,4})):){5})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){4})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,1}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){3})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,2}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){2})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,3}(?:(?:[0-9a-f]{1,4})))?::(?:(?:[0-9a-f]{1,4})):)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,4}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,5}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,6}(?:(?:[0-9a-f]{1,4})))?::)))) \] # an IPv6 address ) (?::[0-9]+)? # a port (optional) (?:/ (?:[\pL\pN\-._\~!$&\'()*+,;=:@]|%%[0-9A-Fa-f]{2})* )* # a path (?:\? (?:[\pL\pN\-._\~!$&\'\[\]()*+,;=:@/?]|%%[0-9A-Fa-f]{2})* )? # a query (optional) (?:\# (?:[\pL\pN\-._\~!$&\'()*+,;=:@/?]|%%[0-9A-Fa-f]{2})* )? # a fragment (optional) )~ixu'; /** * @var string[] * * @psalm-readonly */ private array $prefixes = ['www.']; /** * @psalm-var non-empty-string * * @psalm-readonly */ private string $finalRegex; private string $defaultProtocol; /** * @param array<int, string> $allowedProtocols */ public function __construct(array $allowedProtocols = ['http', 'https', 'ftp'], string $defaultProtocol = 'http') { /** * @psalm-suppress PropertyTypeCoercion */ $this->finalRegex = \sprintf(self::REGEX, \implode('|', $allowedProtocols)); foreach ($allowedProtocols as $protocol) { $this->prefixes[] = $protocol . '://'; } $this->defaultProtocol = $defaultProtocol; } public function getMatchDefinition(): InlineParserMatch { return InlineParserMatch::oneOf(...$this->prefixes); } public function parse(InlineParserContext $inlineContext): bool { $cursor = $inlineContext->getCursor(); // Autolinks can only come at the beginning of a line, after whitespace, or certain delimiting characters $previousChar = $cursor->peek(-1); if (! \in_array($previousChar, self::ALLOWED_AFTER, true)) { return false; } // Check if we have a valid URL if (! \preg_match($this->finalRegex, $cursor->getRemainder(), $matches)) { return false; } $url = $matches[0]; // Does the URL end with punctuation that should be stripped? if (\preg_match('/(.+?)([?!.,:*_~]+)$/', $url, $matches)) { // Add the punctuation later $url = $matches[1]; } // Does the URL end with something that looks like an entity reference? if (\preg_match('/(.+)(&[A-Za-z0-9]+;)$/', $url, $matches)) { $url = $matches[1]; } // Does the URL need unmatched parens chopped off? if (\substr($url, -1) === ')' && ($diff = self::diffParens($url)) > 0) { $url = \substr($url, 0, -$diff); } $cursor->advanceBy(\mb_strlen($url, 'UTF-8')); // Auto-prefix 'http(s)://' onto 'www' URLs if (\substr($url, 0, 4) === 'www.') { $inlineContext->getContainer()->appendChild(new Link($this->defaultProtocol . '://' . $url, $url)); return true; } $inlineContext->getContainer()->appendChild(new Link($url, $url)); return true; } /** * @psalm-pure */ private static function diffParens(string $content): int { // Scan the entire autolink for the total number of parentheses. // If there is a greater number of closing parentheses than opening ones, // we don’t consider ANY of the last characters as part of the autolink, // in order to facilitate including an autolink inside a parenthesis. \preg_match_all('/[()]/', $content, $matches); $charCount = ['(' => 0, ')' => 0]; foreach ($matches[0] as $char) { $charCount[$char]++; } return $charCount[')'] - $charCount['(']; } }
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