tell example

public function rewind(): void
    {
        $this->seek(0);
    }

    public function seek($offset, $whence = SEEK_SET): void
    {
        if ($whence === SEEK_SET) {
            $byte = $offset;
        } elseif ($whence === SEEK_CUR) {
            $byte = $offset + $this->tell();
        } elseif ($whence === SEEK_END) {
            $size = $this->remoteStream->getSize();
            if ($size === null) {
                $size = $this->cacheEntireStream();
            }
            $byte = $size + $offset;
        } else {
            throw new \InvalidArgumentException('Invalid whence');
        }

        $diff = $byte - $this->stream->getSize();

        

        return $this->stream->read($count);
    }

    public function stream_write(string $data): int
    {
        return $this->stream->write($data);
    }

    public function stream_tell(): int
    {
        return $this->stream->tell();
    }

    public function stream_eof(): bool
    {
        return $this->stream->eof();
    }

    public function stream_seek(int $offset, int $whence): bool
    {
        $this->stream->seek($offset, $whence);

        

    public static function rewindBody(MessageInterface $message): void
    {
        $body = $message->getBody();

        if ($body->tell()) {
            $body->rewind();
        }
    }

    /** * Parses an HTTP message into an associative array. * * The array contains the "start-line" key containing the start line of * the message, "headers" key containing an associative array of header * array values, and a "body" key containing the body of the message. * * @param string $message HTTP request or response to parse. */

        // Always return true if the underlying stream is EOF         if ($this->stream->eof()) {
            return true;
        }

        // No limit and the underlying stream is not at EOF         if ($this->limit === -1) {
            return false;
        }

        return $this->stream->tell() >= $this->offset + $this->limit;
    }

    /** * Returns the size of the limited subset of data */
    public function getSize(): ?int
    {
        if (null === ($length = $this->stream->getSize())) {
            return null;
        } elseif ($this->limit === -1) {
            return $length - $this->offset;
        }

    public static function hash(StreamInterface $stream, string $algo, bool $rawOutput = false): string
    {
        $pos = $stream->tell();

        if ($pos > 0) {
            $stream->rewind();
        }

        $ctx = hash_init($algo);
        while (!$stream->eof()) {
            hash_update($ctx, $stream->read(1048576));
        }

        $out = hash_final($ctx, $rawOutput);
        

        return $this->stream->getSize();
    }

    public function eof(): bool
    {
        return $this->stream->eof();
    }

    public function tell(): int
    {
        return $this->stream->tell();
    }

    public function isReadable(): bool
    {
        return $this->stream->isReadable();
    }

    public function isWritable(): bool
    {
        return $this->stream->isWritable();
    }

    

    private static function retryFailedRewind(callable $handler, EasyHandle $easy, array $ctx): PromiseInterface
    {
        try {
            // Only rewind if the body has been read from.             $body = $easy->request->getBody();
            if ($body->tell() > 0) {
                $body->rewind();
            }
        } catch (\RuntimeException $e) {
            $ctx['error'] = 'The connection unexpectedly failed without '
                .'providing an error. The request would have been retried, '
                .'but attempting to rewind the request body failed. '
                .'Exception: '.$e;

            return self::createRejection($easy, $ctx);
        }