comparison vendor/typo3/phar-stream-wrapper/src/Phar/Reader.php @ 5:12f9dff5fda9 tip

Update to Drupal core 8.7.1

+<?php
+namespace TYPO3\PharStreamWrapper\Phar;
+
+/*
+ * This file is part of the TYPO3 project.
+ *
+ * It is free software; you can redistribute it and/or modify it under the terms
+ * of the MIT License (MIT). For the full copyright and license information,
+ * please read the LICENSE file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+class Reader
+{
+    /**
+     * @var string
+     */
+    private $fileName;
+
+    /**
+     * @var string
+     */
+    private $fileType;
+
+    /**
+     * @param string $fileName
+     */
+    public function __construct($fileName)
+    {
+        if (strpos($fileName, '://') !== false) {
+            throw new ReaderException(
+                'File name must not contain stream prefix',
+                1539623708
+            );
+        }
+
+        $this->fileName = $fileName;
+        $this->fileType = $this->determineFileType();
+    }
+
+    /**
+     * @return Container
+     */
+    public function resolveContainer()
+    {
+        $data = $this->extractData($this->resolveStream() . $this->fileName);
+
+        if ($data['stubContent'] === null) {
+            throw new ReaderException(
+                'Cannot resolve stub',
+                1547807881
+            );
+        }
+        if ($data['manifestContent'] === null || $data['manifestLength'] === null) {
+            throw new ReaderException(
+                'Cannot resolve manifest',
+                1547807882
+            );
+        }
+        if (strlen($data['manifestContent']) < $data['manifestLength']) {
+            throw new ReaderException(
+                sprintf(
+                    'Exected manifest length %d, got %d',
+                    strlen($data['manifestContent']),
+                    $data['manifestLength']
+                ),
+                1547807883
+            );
+        }
+
+        return new Container(
+            Stub::fromContent($data['stubContent']),
+            Manifest::fromContent($data['manifestContent'])
+        );
+    }
+
+    /**
+     * @param string $fileName e.g. '/path/file.phar' or 'compress.zlib:///path/file.phar'
+     * @return array
+     */
+    private function extractData($fileName)
+    {
+        $stubContent = null;
+        $manifestContent = null;
+        $manifestLength = null;
+
+        $resource = fopen($fileName, 'r');
+        if (!is_resource($resource)) {
+            throw new ReaderException(
+                sprintf('Resource %s could not be opened', $fileName),
+                1547902055
+            );
+        }
+
+        while (!feof($resource)) {
+            $line = fgets($resource);
+            // stop reading file when manifest can be extracted
+            if ($manifestLength !== null && $manifestContent !== null && strlen($manifestContent) >= $manifestLength) {
+                break;
+            }
+
+            $manifestPosition = strpos($line, '__HALT_COMPILER();');
+
+            // first line contains start of manifest
+            if ($stubContent === null && $manifestContent === null && $manifestPosition !== false) {
+                $stubContent = substr($line, 0, $manifestPosition - 1);
+                $manifestContent = preg_replace('#^.*__HALT_COMPILER\(\);(?>[ \n]\?>(?>\r\n|\n)?)?#', '', $line);
+                $manifestLength = $this->resolveManifestLength($manifestContent);
+            // line contains start of stub
+            } elseif ($stubContent === null) {
+                $stubContent = $line;
+            // line contains start of manifest
+            } elseif ($manifestContent === null && $manifestPosition !== false) {
+                $manifestContent = preg_replace('#^.*__HALT_COMPILER\(\);(?>[ \n]\?>(?>\r\n|\n)?)?#', '', $line);
+                $manifestLength = $this->resolveManifestLength($manifestContent);
+            // manifest has been started (thus is cannot be stub anymore), add content
+            } elseif ($manifestContent !== null) {
+                $manifestContent .= $line;
+                $manifestLength = $this->resolveManifestLength($manifestContent);
+            // stub has been started (thus cannot be manifest here, yet), add content
+            } elseif ($stubContent !== null) {
+                $stubContent .= $line;
+            }
+        }
+        fclose($resource);
+
+        return array(
+            'stubContent' => $stubContent,
+            'manifestContent' => $manifestContent,
+            'manifestLength' => $manifestLength,
+        );
+    }
+
+    /**
+     * Resolves stream in order to handle compressed Phar archives.
+     *
+     * @return string
+     */
+    private function resolveStream()
+    {
+        if ($this->fileType === 'application/x-gzip') {
+            return 'compress.zlib://';
+        } elseif ($this->fileType === 'application/x-bzip2') {
+            return 'compress.bzip2://';
+        }
+        return '';
+    }
+
+    /**
+     * @return string
+     */
+    private function determineFileType()
+    {
+        $fileInfo = new \finfo();
+        return $fileInfo->file($this->fileName, FILEINFO_MIME_TYPE);
+    }
+
+    /**
+     * @param string $content
+     * @return int|null
+     */
+    private function resolveManifestLength($content)
+    {
+        if (strlen($content) < 4) {
+            return null;
+        }
+        return static::resolveFourByteLittleEndian($content, 0);
+    }
+
+    /**
+     * @param string $content
+     * @param int $start
+     * @return int
+     */
+    public static function resolveFourByteLittleEndian($content, $start)
+    {
+        $payload = substr($content, $start, 4);
+        if (!is_string($payload)) {
+            throw new ReaderException(
+                sprintf('Cannot resolve value at offset %d', $start),
+                1539614260
+            );
+        }
+
+        $value = unpack('V', $payload);
+        if (!isset($value[1])) {
+            throw new ReaderException(
+                sprintf('Cannot resolve value at offset %d', $start),
+                1539614261
+            );
+        }
+        return $value[1];
+    }
+
+    /**
+     * @param string $content
+     * @param int $start
+     * @return int
+     */
+    public static function resolveTwoByteBigEndian($content, $start)
+    {
+        $payload = substr($content, $start, 2);
+        if (!is_string($payload)) {
+            throw new ReaderException(
+                sprintf('Cannot resolve value at offset %d', $start),
+                1539614263
+            );
+        }
+
+        $value = unpack('n', $payload);
+        if (!isset($value[1])) {
+            throw new ReaderException(
+                sprintf('Cannot resolve value at offset %d', $start),
+                1539614264
+            );
+        }
+        return $value[1];
+    }
+}