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WebServerConfigurationFileService::__construct()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 8
Code Lines 5

Duplication

Lines 0
Ratio 0 %

Importance

Changes 1
Bugs 0 Features 0
Metric Value
eloc 5
dl 0
loc 8
rs 10
c 1
b 0
f 0
cc 2
nc 2
nop 0
1
<?php
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declare(strict_types=1);
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/*
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 * This file is part of the TYPO3 CMS project.
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 *
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 * It is free software; you can redistribute it and/or modify it under
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 * the terms of the GNU General Public License, either version 2
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 * of the License, or any later version.
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 *
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 * For the full copyright and license information, please read the
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 * LICENSE.txt file that was distributed with this source code.
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 *
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 * The TYPO3 project - inspiring people to share!
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 */
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namespace TYPO3\CMS\Install\Service;
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use TYPO3\CMS\Core\Core\Environment;
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/**
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 * Handles webserver specific configuration files
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 *
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 * @internal This class is only meant to be used within EXT:install and is not part of the TYPO3 Core API.
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 */
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class WebServerConfigurationFileService
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{
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    protected string $webServer;
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    protected string $publicPath;
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    public function __construct()
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    {
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        $this->webServer = $this->getWebServer();
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        if (Environment::getPublicPath() === Environment::getProjectPath()) {
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            $this->publicPath = Environment::getPublicPath();
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        } else {
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            $this->publicPath = substr(Environment::getPublicPath(), strlen(Environment::getProjectPath()) + 1);
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        }
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    }
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    public function addWebServerSpecificBackendRoutingRewriteRules(): bool
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    {
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        $changed = false;
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        if ($this->isApache()) {
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            $changed = $this->addApacheBackendRoutingRewriteRules();
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        } elseif ($this->isMicrosoftIis()) {
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            $changed = $this->addMicrosoftIisBackendRoutingRewriteRules();
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        }
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        return $changed;
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    }
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    protected function addApacheBackendRoutingRewriteRules(): bool
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    {
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        $configurationFilename = $this->publicPath . '/.htaccess';
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        $configurationFileContent = $this->getConfigurationFileContent($configurationFilename);
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        if ($configurationFileContent === '' || !$this->updateNecessary($configurationFileContent)) {
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            return false;
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        }
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        $newRewriteRule = PHP_EOL . '
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    ### BEGIN: TYPO3 automated migration
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    # If the file/symlink/directory does not exist but is below /typo3/, redirect to the TYPO3 Backend entry point.
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    RewriteCond %{REQUEST_FILENAME} !-f
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    RewriteCond %{REQUEST_FILENAME} !-d
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    RewriteCond %{REQUEST_FILENAME} !-l
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    RewriteCond %{REQUEST_URI} ^/typo3/.*$
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    RewriteRule ^typo3/(.*)$ %{ENV:CWD}typo3/index.php [QSA,L]
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    ### END: TYPO3 automated migration';
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        return (bool)file_put_contents(
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            $configurationFilename,
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            str_replace(
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                '# Stop rewrite processing, if we are in the typo3/ directory or any other known directory',
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                '# Stop rewrite processing, if we are in any other known directory',
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                $this->performBackendRoutingRewriteRulesUpdate(
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                    '/(RewriteRule\s\^\(\?\:(typo3\/\|).*\s\[L\])(.*RewriteRule\s\^\.\*\$\s%{ENV:CWD}index\.php\s\[QSA,L\])/s',
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                    $newRewriteRule,
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                    $configurationFileContent,
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                )
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            )
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        );
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    }
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    protected function addMicrosoftIisBackendRoutingRewriteRules(): bool
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    {
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        $configurationFilename = $this->publicPath . '/web.config';
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        $configurationFileContent = $this->getConfigurationFileContent($configurationFilename);
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        if ($configurationFileContent === '' || !$this->updateNecessary($configurationFileContent)) {
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            return false;
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        }
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        $newRewriteRule = '
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                <!-- BEGIN: TYPO3 automated migration -->
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                <rule name="TYPO3 - If the file/directory does not exist but is below /typo3/, redirect to the TYPO3 Backend entry point." stopProcessing="true">
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                    <match url="^typo3/(.*)$" ignoreCase="false" />
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                    <conditions logicalGrouping="MatchAll">
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                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
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                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
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                        <add input="{REQUEST_URI}" matchType="Pattern" pattern="^/typo3/.*$" />
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                    </conditions>
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                    <action type="Rewrite" url="typo3/index.php" appendQueryString="true" />
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                </rule>
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                <!-- END: TYPO3 automated migration -->';
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        return (bool)file_put_contents(
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            $configurationFilename,
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            $this->performBackendRoutingRewriteRulesUpdate(
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                '/(<match\surl="\^\/\((typo3\|).*\)\$"\s\/>.+?<\/rule>)(.*<action\stype="Rewrite"\surl="index\.php")/s',
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                $newRewriteRule,
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                $configurationFileContent
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            )
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        );
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    }
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    /**
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     * Returns the webserver configuration if it exists, is readable and is writeable
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     *
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     * @param string $filename The webserver configuration file name
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     * @return string The webserver configuration or an empty string
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     */
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    protected function getConfigurationFileContent(string $filename): string
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    {
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        if (!file_exists($filename) || !is_readable($filename) || !is_writable($filename)) {
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            return '';
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        }
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        return file_get_contents($filename) ?: '';
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    }
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    /**
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     * Checks if the webserver configuration needs to be updated.
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     *
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     * This currently checks if the "known directory" rule still
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     * contains the `typo3` directory and the frontend rewrite rule
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     * exists. Later is needed since the backend rewrite rule must
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     * be placed before.
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     *
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     * @param string $configurationFileContent
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     * @return bool
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     */
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    protected function updateNecessary(string $configurationFileContent): bool
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    {
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        if ($this->isApache()) {
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            return (bool)preg_match('/RewriteRule\s\^\(\?\:typo3\/\|.*\s\[L\].*RewriteRule\s\^\.\*\$\s%{ENV:CWD}index\.php\s\[QSA,L\]/s', $configurationFileContent)
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                && strpos($configurationFileContent, 'RewriteRule ^typo3/(.*)$ %{ENV:CWD}typo3/index.php [QSA,L]') === false;
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        }
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        if ($this->isMicrosoftIis()) {
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            return (bool)preg_match('/<match\surl="\^\/\(typo3\|.*\)\$"\s\/>.*<action\stype="Rewrite"\surl="index.php"\sappendQueryString="true"\s\/>/s', $configurationFileContent)
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                && strpos($configurationFileContent, '<action type="Rewrite" url="typo3/index.php" appendQueryString="true" />') === false;
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        }
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        return false;
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    }
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    /**
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     * Removes the 'typo3' directory from the existing "known directory" rewrite rule and
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     * adds the new backend rewrite rule between this rule and the frontend rewrite rule.
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     *
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     * Pattern must contain three capturing groups:
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     * 1: The "known directory" rule from which "typo3" should be removed
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     * 2: The "typo3" string to be removed
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     * 3: The subsequent part including the frontend rewrite rule
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     *
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     * The new rule will then be added between group 1 and group 3.
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     *
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     * @param string $pattern
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     * @param string $newRewriteRule
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     * @param string $configurationFileContent
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     *
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     * @return string The updated webserver configuration
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     */
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    protected function performBackendRoutingRewriteRulesUpdate(
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        string $pattern,
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        string $newRewriteRule,
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        string $configurationFileContent
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    ): string {
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        return preg_replace_callback(
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            $pattern,
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            static function ($matches) use ($newRewriteRule) {
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                return str_replace($matches[2], '', ($matches[1] . $newRewriteRule)) . $matches[3];
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            },
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            $configurationFileContent,
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            1
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        );
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    }
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    protected function isApache(): bool
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    {
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        return strpos($this->webServer, 'Apache') === 0;
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    }
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    protected function isMicrosoftIis(): bool
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    {
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        return strpos($this->webServer, 'Microsoft-IIS') === 0;
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    }
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    protected function getWebServer(): string
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    {
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        return $_SERVER['SERVER_SOFTWARE'] ?? '';
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    }
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}
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