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<?php
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declare(strict_types=1);
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namespace Aidphp\Http;
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use Psr\Http\Message\StreamInterface;
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use InvalidArgumentException;
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use RuntimeException;
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class Stream implements StreamInterface
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{
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private $stream;
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private $seekable;
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private $readable;
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private $writable;
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private $uri;
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private $size;
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private static $readWriteHash = [
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'read' => [
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'r' => true, 'w+' => true, 'r+' => true, 'x+' => true, 'c+' => true,
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'rb' => true, 'w+b' => true, 'r+b' => true, 'x+b' => true,
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'c+b' => true, 'rt' => true, 'w+t' => true, 'r+t' => true,
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'x+t' => true, 'c+t' => true, 'a+' => true,
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],
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'write' => [
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'w' => true, 'w+' => true, 'rw' => true, 'r+' => true, 'x+' => true,
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'c+' => true, 'wb' => true, 'w+b' => true, 'r+b' => true,
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'x+b' => true, 'c+b' => true, 'w+t' => true, 'r+t' => true,
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'x+t' => true, 'c+t' => true, 'a' => true, 'a+' => true,
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],
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];
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public function __construct($resource)
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{
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if (! is_resource($resource))
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{
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throw new InvalidArgumentException('Stream must be a resource');
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}
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$this->stream = $resource;
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$meta = $this->getMetadata();
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$this->seekable = $meta['seekable'];
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$this->readable = isset(self::$readWriteHash['read'][$meta['mode']]);
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$this->writable = isset(self::$readWriteHash['write'][$meta['mode']]);
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$this->uri = $meta['uri'] ?? null;
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}
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public function __toString(): string
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{
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try
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{
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if ($this->seekable)
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{
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$this->rewind();
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}
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return $this->getContents();
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}
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catch (RuntimeException $e)
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{
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return '';
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}
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}
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public function close(): void
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{
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if (null !== $this->stream)
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{
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fclose($this->stream);
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$this->detach();
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}
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}
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public function detach()
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{
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$result = $this->stream;
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$this->stream =
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$this->size =
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$this->uri = null;
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$this->readable =
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$this->writable =
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$this->seekable = false;
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return $result;
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}
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public function getSize(): ?int
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{
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if (null === $this->size && $this->stream)
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{
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if ($this->uri)
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{
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clearstatcache(true, $this->uri);
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}
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$stats = fstat($this->stream);
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if (isset($stats['size']))
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{
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$this->size = $stats['size'];
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}
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}
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return $this->size;
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}
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public function tell(): int
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{
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if (null === $this->stream || false === ($result = ftell($this->stream)))
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{
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throw new RuntimeException('Unable to determine stream position');
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}
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return $result;
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}
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public function eof(): bool
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{
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return null === $this->stream || feof($this->stream);
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}
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public function isSeekable(): bool
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{
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return $this->seekable;
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}
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public function seek($offset, $whence = SEEK_SET): void
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{
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if (false === $this->seekable || -1 === fseek($this->stream, $offset, $whence))
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{
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throw new RuntimeException('Unable to seek to stream position ' . $offset . ' with whence ' . var_export($whence, true));
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}
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}
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public function rewind(): void
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{
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$this->seek(0);
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}
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public function isWritable(): bool
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{
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return $this->writable;
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}
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public function write($string): int
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{
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$this->size = null;
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if (false === $this->writable || false === ($result = fwrite($this->stream, $string)))
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{
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throw new RuntimeException('Unable to write to stream');
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}
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return $result;
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}
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public function isReadable(): bool
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{
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return $this->readable;
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}
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4 |
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public function read($length): string
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{
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if (false === $this->readable)
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{
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throw new RuntimeException('Cannot read from non-readable stream');
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}
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return fread($this->stream, $length);
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}
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public function getContents(): string
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{
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if (false === $this->readable || false === ($result = stream_get_contents($this->stream)))
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{
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throw new RuntimeException('Unable to get stream contents');
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}
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return $result;
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}
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public function getMetadata($key = null)
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{
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if (null === $this->stream)
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{
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return $key ? null : [];
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}
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$meta = stream_get_meta_data($this->stream);
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return null === $key ? $meta : (isset($meta[$key]) ? $meta[$key] : null);
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}
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} |
aidphp /
http
