commitall

vendor/guzzlehttp/psr7/src/Stream.php

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+<?php
+
+declare(strict_types=1);
+
+namespace GuzzleHttp\Psr7;
+
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * PHP stream implementation.
+ */
+class Stream implements StreamInterface
+{
+    /**
+     * @see http://php.net/manual/function.fopen.php
+     * @see http://php.net/manual/en/function.gzopen.php
+     */
+    private const READABLE_MODES = '/r|a\+|ab\+|w\+|wb\+|x\+|xb\+|c\+|cb\+/';
+    private const WRITABLE_MODES = '/a|w|r\+|rb\+|rw|x|c/';
+
+    /** @var resource */
+    private $stream;
+    /** @var int|null */
+    private $size;
+    /** @var bool */
+    private $seekable;
+    /** @var bool */
+    private $readable;
+    /** @var bool */
+    private $writable;
+    /** @var string|null */
+    private $uri;
+    /** @var mixed[] */
+    private $customMetadata;
+
+    /**
+     * This constructor accepts an associative array of options.
+     *
+     * - size: (int) If a read stream would otherwise have an indeterminate
+     *   size, but the size is known due to foreknowledge, then you can
+     *   provide that size, in bytes.
+     * - metadata: (array) Any additional metadata to return when the metadata
+     *   of the stream is accessed.
+     *
+     * @param resource                            $stream  Stream resource to wrap.
+     * @param array{size?: int, metadata?: array} $options Associative array of options.
+     *
+     * @throws \InvalidArgumentException if the stream is not a stream resource
+     */
+    public function __construct($stream, array $options = [])
+    {
+        if (!is_resource($stream)) {
+            throw new \InvalidArgumentException('Stream must be a resource');
+        }
+
+        if (isset($options['size'])) {
+            $this->size = $options['size'];
+        }
+
+        $this->customMetadata = $options['metadata'] ?? [];
+        $this->stream = $stream;
+        $meta = stream_get_meta_data($this->stream);
+        $this->seekable = $meta['seekable'];
+        $this->readable = (bool)preg_match(self::READABLE_MODES, $meta['mode']);
+        $this->writable = (bool)preg_match(self::WRITABLE_MODES, $meta['mode']);
+        $this->uri = $this->getMetadata('uri');
+    }
+
+    /**
+     * Closes the stream when the destructed
+     */
+    public function __destruct()
+    {
+        $this->close();
+    }
+
+    public function __toString(): string
+    {
+        try {
+            if ($this->isSeekable()) {
+                $this->seek(0);
+            }
+            return $this->getContents();
+        } catch (\Throwable $e) {
+            if (\PHP_VERSION_ID >= 70400) {
+                throw $e;
+            }
+            trigger_error(sprintf('%s::__toString exception: %s', self::class, (string) $e), E_USER_ERROR);
+            return '';
+        }
+    }
+
+    public function getContents(): string
+    {
+        if (!isset($this->stream)) {
+            throw new \RuntimeException('Stream is detached');
+        }
+
+        if (!$this->readable) {
+            throw new \RuntimeException('Cannot read from non-readable stream');
+        }
+
+        return Utils::tryGetContents($this->stream);
+    }
+
+    public function close(): void
+    {
+        if (isset($this->stream)) {
+            if (is_resource($this->stream)) {
+                fclose($this->stream);
+            }
+            $this->detach();
+        }
+    }
+
+    public function detach()
+    {
+        if (!isset($this->stream)) {
+            return null;
+        }
+
+        $result = $this->stream;
+        unset($this->stream);
+        $this->size = $this->uri = null;
+        $this->readable = $this->writable = $this->seekable = false;
+
+        return $result;
+    }
+
+    public function getSize(): ?int
+    {
+        if ($this->size !== null) {
+            return $this->size;
+        }
+
+        if (!isset($this->stream)) {
+            return null;
+        }
+
+        // Clear the stat cache if the stream has a URI
+        if ($this->uri) {
+            clearstatcache(true, $this->uri);
+        }
+
+        $stats = fstat($this->stream);
+        if (is_array($stats) && isset($stats['size'])) {
+            $this->size = $stats['size'];
+            return $this->size;
+        }
+
+        return null;
+    }
+
+    public function isReadable(): bool
+    {
+        return $this->readable;
+    }
+
+    public function isWritable(): bool
+    {
+        return $this->writable;
+    }
+
+    public function isSeekable(): bool
+    {
+        return $this->seekable;
+    }
+
+    public function eof(): bool
+    {
+        if (!isset($this->stream)) {
+            throw new \RuntimeException('Stream is detached');
+        }
+
+        return feof($this->stream);
+    }
+
+    public function tell(): int
+    {
+        if (!isset($this->stream)) {
+            throw new \RuntimeException('Stream is detached');
+        }
+
+        $result = ftell($this->stream);
+
+        if ($result === false) {
+            throw new \RuntimeException('Unable to determine stream position');
+        }
+
+        return $result;
+    }
+
+    public function rewind(): void
+    {
+        $this->seek(0);
+    }
+
+    public function seek($offset, $whence = SEEK_SET): void
+    {
+        $whence = (int) $whence;
+
+        if (!isset($this->stream)) {
+            throw new \RuntimeException('Stream is detached');
+        }
+        if (!$this->seekable) {
+            throw new \RuntimeException('Stream is not seekable');
+        }
+        if (fseek($this->stream, $offset, $whence) === -1) {
+            throw new \RuntimeException('Unable to seek to stream position '
+                . $offset . ' with whence ' . var_export($whence, true));
+        }
+    }
+
+    public function read($length): string
+    {
+        if (!isset($this->stream)) {
+            throw new \RuntimeException('Stream is detached');
+        }
+        if (!$this->readable) {
+            throw new \RuntimeException('Cannot read from non-readable stream');
+        }
+        if ($length < 0) {
+            throw new \RuntimeException('Length parameter cannot be negative');
+        }
+
+        if (0 === $length) {
+            return '';
+        }
+
+        try {
+            $string = fread($this->stream, $length);
+        } catch (\Exception $e) {
+            throw new \RuntimeException('Unable to read from stream', 0, $e);
+        }
+
+        if (false === $string) {
+            throw new \RuntimeException('Unable to read from stream');
+        }
+
+        return $string;
+    }
+
+    public function write($string): int
+    {
+        if (!isset($this->stream)) {
+            throw new \RuntimeException('Stream is detached');
+        }
+        if (!$this->writable) {
+            throw new \RuntimeException('Cannot write to a non-writable stream');
+        }
+
+        // We can't know the size after writing anything
+        $this->size = null;
+        $result = fwrite($this->stream, $string);
+
+        if ($result === false) {
+            throw new \RuntimeException('Unable to write to stream');
+        }
+
+        return $result;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @return mixed
+     */
+    public function getMetadata($key = null)
+    {
+        if (!isset($this->stream)) {
+            return $key ? null : [];
+        } elseif (!$key) {
+            return $this->customMetadata + stream_get_meta_data($this->stream);
+        } elseif (isset($this->customMetadata[$key])) {
+            return $this->customMetadata[$key];
+        }
+
+        $meta = stream_get_meta_data($this->stream);
+
+        return $meta[$key] ?? null;
+    }
+}