mirror of https://github.com/friendica/friendica
717 lines
18 KiB
PHP
717 lines
18 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2024, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Util;
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use Friendica\Core\Hook;
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use Friendica\Core\Logger;
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use Friendica\DI;
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use Friendica\Model\Contact;
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use Friendica\Network\HTTPClient\Client\HttpClientAccept;
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use Friendica\Network\HTTPClient\Client\HttpClientOptions;
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use Friendica\Network\HTTPException\NotModifiedException;
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use GuzzleHttp\Psr7\Uri;
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use Psr\Http\Message\UriInterface;
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class Network
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{
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/**
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* Return raw post data from a post request
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*
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* @return string post data
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*/
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public static function postdata()
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{
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return file_get_contents('php://input');
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}
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/**
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* Check URL to see if it's real
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*
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* Take a URL from the wild, prepend http:// if necessary
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* and check DNS to see if it's real (or check if is a valid IP address)
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*
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* @param string $url The URL to be validated
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*
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* @return string|boolean The actual working URL, false else
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function isUrlValid(string $url)
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{
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if (DI::config()->get('system', 'disable_url_validation')) {
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return $url;
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}
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// no naked subdomains (allow localhost for tests)
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if (strpos($url, '.') === false && strpos($url, '/localhost/') === false) {
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return false;
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}
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if (substr($url, 0, 4) != 'http') {
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$url = 'http://' . $url;
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}
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$xrd_timeout = DI::config()->get('system', 'xrd_timeout');
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$host = parse_url($url, PHP_URL_HOST);
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if (empty($host) || !(filter_var($host, FILTER_VALIDATE_IP) || @dns_get_record($host . '.', DNS_A + DNS_AAAA))) {
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return false;
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}
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if (in_array(parse_url($url, PHP_URL_SCHEME), ['https', 'http'])) {
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$options = [HttpClientOptions::VERIFY => true, HttpClientOptions::TIMEOUT => $xrd_timeout];
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try {
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$curlResult = DI::httpClient()->head($url, $options);
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} catch (\Exception $e) {
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return false;
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}
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// Workaround for systems that can't handle a HEAD request. Don't retry on timeouts.
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if (!$curlResult->isSuccess() && ($curlResult->getReturnCode() >= 400) && !in_array($curlResult->getReturnCode(), [408, 504])) {
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try {
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$curlResult = DI::httpClient()->get($url, HttpClientAccept::DEFAULT, $options);
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} catch (\Exception $e) {
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return false;
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}
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}
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if (!$curlResult->isSuccess()) {
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Logger::notice('Url not reachable', ['host' => $host, 'url' => $url]);
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return false;
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} elseif ($curlResult->isRedirectUrl()) {
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$url = $curlResult->getRedirectUrl();
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}
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}
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return $url;
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}
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/**
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* Checks that email is an actual resolvable internet address
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*
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* @param string $addr The email address
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* @return boolean True if it's a valid email address, false if it's not
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*/
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public static function isEmailDomainValid(string $addr): bool
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{
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if (DI::config()->get('system', 'disable_email_validation')) {
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return true;
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}
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if (! strpos($addr, '@')) {
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return false;
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}
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$h = substr($addr, strpos($addr, '@') + 1);
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// Concerning the @ see here: https://stackoverflow.com/questions/36280957/dns-get-record-a-temporary-server-error-occurred
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if ($h && (@dns_get_record($h, DNS_A + DNS_AAAA + DNS_MX) || filter_var($h, FILTER_VALIDATE_IP))) {
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return true;
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}
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if ($h && @dns_get_record($h, DNS_CNAME + DNS_MX)) {
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return true;
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}
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return false;
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}
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/**
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* Check if URL is allowed
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*
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* Check $url against our list of allowed sites,
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* wildcards allowed. If allowed_sites is unset return true;
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*
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* @param string $url URL which get tested
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* @return boolean True if url is allowed otherwise return false
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*/
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public static function isUrlAllowed(string $url): bool
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{
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$h = @parse_url($url);
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if (! $h) {
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return false;
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}
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$str_allowed = DI::config()->get('system', 'allowed_sites');
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if (! $str_allowed) {
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return true;
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}
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$found = false;
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$host = strtolower($h['host']);
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// always allow our own site
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if ($host == strtolower($_SERVER['SERVER_NAME'])) {
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return true;
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}
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$fnmatch = function_exists('fnmatch');
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$allowed = explode(',', $str_allowed);
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if (count($allowed)) {
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foreach ($allowed as $a) {
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$pat = strtolower(trim($a));
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if (($fnmatch && fnmatch($pat, $host)) || ($pat == $host)) {
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$found = true;
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break;
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}
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}
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}
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return $found;
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}
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/**
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* Checks if the provided url domain is on the domain blocklist.
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* Returns true if it is or malformed URL, false if not.
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*
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* @param string $url The url to check the domain from
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*
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* @return boolean
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*
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* @deprecated since 2023.03 Use isUriBlocked instead
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*/
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public static function isUrlBlocked(string $url): bool
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{
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try {
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return self::isUriBlocked(new Uri($url));
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} catch (\Throwable $e) {
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Logger::warning('Invalid URL', ['url' => $url]);
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return false;
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}
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}
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/**
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* Checks if the provided URI domain is on the domain blocklist.
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*
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* @param UriInterface $uri
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* @return boolean
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*/
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public static function isUriBlocked(UriInterface $uri): bool
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{
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if (!$uri->getHost()) {
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return false;
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}
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$domain_blocklist = DI::config()->get('system', 'blocklist', []);
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if (!$domain_blocklist) {
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return false;
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}
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foreach ($domain_blocklist as $domain_block) {
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if (!empty($domain_block['domain']) && fnmatch(strtolower($domain_block['domain']), strtolower($uri->getHost()))) {
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return true;
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}
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}
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return false;
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}
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/**
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* Checks if the provided url is on the list of domains where redirects are blocked.
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* Returns true if it is or malformed URL, false if not.
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*
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* @param string $url The url to check the domain from
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*
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* @return boolean
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*/
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public static function isRedirectBlocked(string $url): bool
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{
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$host = @parse_url($url, PHP_URL_HOST);
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if (!$host) {
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return false;
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}
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$no_redirect_list = DI::config()->get('system', 'no_redirect_list', []);
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if (!$no_redirect_list) {
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return false;
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}
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foreach ($no_redirect_list as $no_redirect) {
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if (fnmatch(strtolower($no_redirect), strtolower($host))) {
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return true;
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}
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}
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return false;
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}
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/**
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* Check if email address is allowed to register here.
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*
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* Compare against our list (wildcards allowed).
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*
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* @param string $email email address
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* @return boolean False if not allowed, true if allowed
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* or if allowed list is not configured
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function isEmailDomainAllowed(string $email): bool
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{
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$domain = strtolower(substr($email, strpos($email, '@') + 1));
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if (!$domain) {
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return false;
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}
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$allowed = DI::config()->get('system', 'allowed_email');
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if (!empty($allowed) && self::isDomainMatch($domain, explode(',', $allowed))) {
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return true;
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}
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$disallowed = DI::config()->get('system', 'disallowed_email');
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if (!empty($disallowed) && self::isDomainMatch($domain, explode(',', $disallowed))) {
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return false;
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}
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return true;
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}
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/**
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* Checks for the existence of a domain in a domain list
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*
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* @param string $domain
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* @param array $domain_list
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*
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* @return boolean
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*/
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public static function isDomainMatch(string $domain, array $domain_list): bool
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{
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$found = false;
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foreach ($domain_list as $item) {
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$pat = strtolower(trim($item));
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if (fnmatch($pat, $domain) || ($pat == $domain)) {
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$found = true;
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break;
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}
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}
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return $found;
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}
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public static function lookupAvatarByEmail(string $email): string
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{
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$avatar['size'] = 300;
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$avatar['email'] = $email;
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$avatar['url'] = '';
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$avatar['success'] = false;
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Hook::callAll('avatar_lookup', $avatar);
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if (! $avatar['success']) {
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$avatar['url'] = DI::baseUrl() . Contact::DEFAULT_AVATAR_PHOTO;
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}
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Logger::info('Avatar: ' . $avatar['email'] . ' ' . $avatar['url']);
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return $avatar['url'];
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}
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/**
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* Remove Google Analytics and other tracking platforms params from URL
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*
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* @param string $url Any user-submitted URL that may contain tracking params
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*
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* @return string The same URL stripped of tracking parameters
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*/
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public static function stripTrackingQueryParams(string $url): string
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{
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$urldata = parse_url($url);
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if (!empty($urldata['query'])) {
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$query = $urldata['query'];
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parse_str($query, $querydata);
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if (is_array($querydata)) {
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foreach ($querydata as $param => $value) {
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if (in_array(
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$param,
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[
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'utm_source', 'utm_medium', 'utm_term', 'utm_content', 'utm_campaign',
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// As seen from Purism
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'mtm_source', 'mtm_medium', 'mtm_term', 'mtm_content', 'mtm_campaign',
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'wt_mc', 'pk_campaign', 'pk_kwd', 'mc_cid', 'mc_eid',
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'fb_action_ids', 'fb_action_types', 'fb_ref',
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'awesm', 'wtrid',
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'woo_campaign', 'woo_source', 'woo_medium', 'woo_content', 'woo_term']
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)
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) {
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$pair = $param . '=' . urlencode($value);
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$url = str_replace($pair, '', $url);
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// Second try: if the url isn't encoded completely
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$pair = $param . '=' . str_replace(' ', '+', $value);
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$url = str_replace($pair, '', $url);
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// Third try: Maybe the url isn't encoded at all
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$pair = $param . '=' . $value;
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$url = str_replace($pair, '', $url);
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$url = str_replace(['?&', '&&'], ['?', ''], $url);
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}
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}
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}
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if (substr($url, -1, 1) == '?') {
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$url = substr($url, 0, -1);
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}
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}
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return $url;
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}
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/**
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* Add a missing base path (scheme and host) to a given url
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*
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* @param string $url
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* @param string $basepath
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*
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* @return string url
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*/
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public static function addBasePath(string $url, string $basepath): string
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{
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$url = trim($url);
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if (!empty(parse_url($url, PHP_URL_SCHEME)) || empty(parse_url($basepath, PHP_URL_SCHEME)) || empty($url) || empty(parse_url($url))) {
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return $url;
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}
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$base = [
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'scheme' => parse_url($basepath, PHP_URL_SCHEME),
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'host' => parse_url($basepath, PHP_URL_HOST),
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];
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$parts = array_merge($base, parse_url('/' . ltrim($url, '/')));
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return self::unparseURL($parts);
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}
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/**
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* Find the matching part between two url
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*
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* @param string $url1
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* @param string $url2
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*
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* @return string The matching part or empty string on error
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*/
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public static function getUrlMatch(string $url1, string $url2): string
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{
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if (($url1 == '') || ($url2 == '')) {
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return '';
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}
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$url1 = Strings::normaliseLink($url1);
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$url2 = Strings::normaliseLink($url2);
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$parts1 = parse_url($url1);
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$parts2 = parse_url($url2);
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if (!isset($parts1['host']) || !isset($parts2['host'])) {
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return '';
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}
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if (empty($parts1['scheme'])) {
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$parts1['scheme'] = '';
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}
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if (empty($parts2['scheme'])) {
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$parts2['scheme'] = '';
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}
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if ($parts1['scheme'] != $parts2['scheme']) {
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return '';
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}
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if (empty($parts1['host'])) {
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$parts1['host'] = '';
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}
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if (empty($parts2['host'])) {
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$parts2['host'] = '';
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}
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if ($parts1['host'] != $parts2['host']) {
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return '';
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}
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if (empty($parts1['port'])) {
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$parts1['port'] = '';
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}
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if (empty($parts2['port'])) {
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$parts2['port'] = '';
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}
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if ($parts1['port'] != $parts2['port']) {
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return '';
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}
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$match = $parts1['scheme'] . '://' . $parts1['host'];
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if ($parts1['port']) {
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$match .= ':' . $parts1['port'];
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}
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if (empty($parts1['path'])) {
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$parts1['path'] = '';
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}
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if (empty($parts2['path'])) {
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$parts2['path'] = '';
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}
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$pathparts1 = explode('/', $parts1['path']);
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$pathparts2 = explode('/', $parts2['path']);
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$i = 0;
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$path = '';
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do {
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$path1 = $pathparts1[$i] ?? '';
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$path2 = $pathparts2[$i] ?? '';
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if ($path1 == $path2) {
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$path .= $path1 . '/';
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}
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} while (($path1 == $path2) && ($i++ <= count($pathparts1)));
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$match .= $path;
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return Strings::normaliseLink($match);
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}
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/**
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* Glue url parts together
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*
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* @param array $parsed URL parts
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*
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* @return string|null The glued URL or null on error
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* @deprecated since version 2021.12, use GuzzleHttp\Psr7\Uri::fromParts($parts) instead
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*/
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public static function unparseURL(array $parsed): string
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{
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$get = function ($key) use ($parsed) {
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return isset($parsed[$key]) ? $parsed[$key] : null;
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};
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$pass = $get('pass');
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$user = $get('user');
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$userinfo = $pass !== null ? "$user:$pass" : $user;
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$port = $get('port');
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$scheme = $get('scheme');
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$query = $get('query');
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$fragment = $get('fragment');
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$authority = ($userinfo !== null ? $userinfo . '@' : '') .
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$get('host') .
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($port ? ":$port" : '');
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return (!empty($scheme) ? $scheme . ':' : '') .
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(!empty($authority) ? '//' . $authority : '') .
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$get('path') .
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(!empty($query) ? '?' . $query : '') .
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(!empty($fragment) ? '#' . $fragment : '');
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}
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/**
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* Convert an URI to an IDN compatible URI
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*
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* @param string $uri
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*
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* @return string
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*/
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public static function convertToIdn(string $uri): string
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{
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$parts = parse_url($uri);
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if (!empty($parts['scheme']) && !empty($parts['host'])) {
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$parts['host'] = self::idnToAscii($parts['host']);
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$uri = (string)Uri::fromParts($parts);
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} else {
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$parts = explode('@', $uri);
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if (count($parts) == 2) {
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$uri = $parts[0] . '@' . self::idnToAscii($parts[1]);
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} else {
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$uri = self::idnToAscii($uri);
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}
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}
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return $uri;
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}
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private static function idnToAscii(string $uri): string
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{
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if (!function_exists('idn_to_ascii')) {
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Logger::error('IDN functions are missing.');
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return $uri;
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}
|
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return idn_to_ascii($uri);
|
|
}
|
|
|
|
/**
|
|
* Switch the scheme of an url between http and https
|
|
*
|
|
* @param string $url
|
|
*
|
|
* @return string Switched URL
|
|
*/
|
|
public static function switchScheme(string $url): string
|
|
{
|
|
$scheme = parse_url($url, PHP_URL_SCHEME);
|
|
if (empty($scheme)) {
|
|
return $url;
|
|
}
|
|
|
|
if ($scheme === 'http') {
|
|
$url = str_replace('http://', 'https://', $url);
|
|
} elseif ($scheme === 'https') {
|
|
$url = str_replace('https://', 'http://', $url);
|
|
}
|
|
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* Adds query string parameters to the provided URI. Replace the value of existing keys.
|
|
*
|
|
* @param string $path
|
|
* @param array $additionalParams Associative array of parameters
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function appendQueryParam(string $path, array $additionalParams): string
|
|
{
|
|
$parsed = parse_url($path);
|
|
|
|
$params = [];
|
|
if (!empty($parsed['query'])) {
|
|
parse_str($parsed['query'], $params);
|
|
}
|
|
|
|
$params = array_merge($params, $additionalParams);
|
|
|
|
$parsed['query'] = http_build_query($params);
|
|
|
|
return self::unparseURL($parsed);
|
|
}
|
|
|
|
/**
|
|
* Generates ETag and Last-Modified response headers and checks them against
|
|
* If-None-Match and If-Modified-Since request headers if present.
|
|
*
|
|
* Blocking function, sends 304 headers and exits if check passes.
|
|
*
|
|
* @param string $etag The page etag
|
|
* @param string $last_modified The page last modification UTC date
|
|
*
|
|
* @return void
|
|
* @throws \Exception
|
|
*/
|
|
public static function checkEtagModified(string $etag, string $last_modified)
|
|
{
|
|
$last_modified = DateTimeFormat::utc($last_modified, 'D, d M Y H:i:s') . ' GMT';
|
|
|
|
/**
|
|
* @see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.26
|
|
*/
|
|
$if_none_match = filter_input(INPUT_SERVER, 'HTTP_IF_NONE_MATCH');
|
|
$if_modified_since = filter_input(INPUT_SERVER, 'HTTP_IF_MODIFIED_SINCE');
|
|
$flag_not_modified = null;
|
|
if ($if_none_match) {
|
|
$result = [];
|
|
preg_match('/^(?:W\/")?([^"]+)"?$/i', $etag, $result);
|
|
$etagTrimmed = $result[1];
|
|
// Lazy exact ETag match, could check weak/strong ETags
|
|
$flag_not_modified = $if_none_match == '*' || strpos($if_none_match, $etagTrimmed) !== false;
|
|
}
|
|
|
|
if ($if_modified_since && (!$if_none_match || $flag_not_modified)) {
|
|
// Lazy exact Last-Modified match, could check If-Modified-Since validity
|
|
$flag_not_modified = $if_modified_since == $last_modified;
|
|
}
|
|
|
|
header('Etag: ' . $etag);
|
|
header('Last-Modified: ' . $last_modified);
|
|
|
|
if ($flag_not_modified) {
|
|
throw new NotModifiedException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if the given URL is a local link
|
|
*
|
|
* @param string $url
|
|
*
|
|
* @return bool
|
|
* @deprecated since 2023.09, please use BaseUrl->isLocalUrl or BaseUrl->isLocalUri instead.
|
|
*/
|
|
public static function isLocalLink(string $url): bool
|
|
{
|
|
return DI::baseUrl()->isLocalUrl($url);
|
|
}
|
|
|
|
/**
|
|
* Check if the given URL is a valid HTTP/HTTPS URL
|
|
*
|
|
* @param string $url
|
|
* @return bool
|
|
*/
|
|
public static function isValidHttpUrl(string $url): bool
|
|
{
|
|
$scheme = parse_url($url, PHP_URL_SCHEME);
|
|
return !empty($scheme) && in_array($scheme, ['http', 'https']) && parse_url($url, PHP_URL_HOST);
|
|
}
|
|
|
|
/**
|
|
* Remove invalid parts from an URL
|
|
*
|
|
* @param string $url
|
|
* @return string sanitized URL
|
|
*/
|
|
public static function sanitizeUrl(string $url): string
|
|
{
|
|
$sanitized = $url = trim($url);
|
|
|
|
foreach (['"', ' '] as $character) {
|
|
$pos = strpos($sanitized, $character);
|
|
if ($pos !== false) {
|
|
$sanitized = trim(substr($sanitized, 0, $pos));
|
|
}
|
|
}
|
|
|
|
if ($sanitized != $url) {
|
|
Logger::debug('Link got sanitized', ['url' => $url, 'sanitzed' => $sanitized]);
|
|
}
|
|
return $sanitized;
|
|
}
|
|
|
|
/**
|
|
* Creates an Uri object out of a given Uri string
|
|
*
|
|
* @param string|null $uri
|
|
* @return UriInterface|null
|
|
*/
|
|
public static function createUriFromString(string $uri = null): ?UriInterface
|
|
{
|
|
if (empty($uri)) {
|
|
return null;
|
|
}
|
|
|
|
try {
|
|
return new Uri($uri);
|
|
} catch (\Exception $e) {
|
|
Logger::debug('Invalid URI', ['code' => $e->getCode(), 'message' => $e->getMessage(), 'uri' => $uri]);
|
|
return null;
|
|
}
|
|
}
|
|
}
|