UploadSourceAdapter.php

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<?php
class UploadSourceAdapter {
    public static $sourceRegistrations = [];

    private $mSource;

    private $mBuffer;

    private $mPosition;

    static function registerSource( ImportSource $source ) {
        $id = wfRandomString();

        self::$sourceRegistrations[$id] = $source;

        return $id;
    }

    function stream_open( $path, $mode, $options, &$opened_path ) {
        $url = parse_url( $path );
        $id = $url['host'];

        if ( !isset( self::$sourceRegistrations[$id] ) ) {
            return false;
        }

        $this->mSource = self::$sourceRegistrations[$id];

        return true;
    }

    function stream_read( $count ) {
        $return = '';
        $leave = false;

        while ( !$leave && !$this->mSource->atEnd() &&
                strlen( $this->mBuffer ) < $count ) {
            $read = $this->mSource->readChunk();

            if ( !strlen( $read ) ) {
                $leave = true;
            }

            $this->mBuffer .= $read;
        }

        if ( strlen( $this->mBuffer ) ) {
            $return = substr( $this->mBuffer, 0, $count );
            $this->mBuffer = substr( $this->mBuffer, $count );
        }

        $this->mPosition += strlen( $return );

        return $return;
    }

    function stream_write( $data ) {
        return false;
    }

    function stream_tell() {
        return $this->mPosition;
    }

    function stream_eof() {
        return $this->mSource->atEnd();
    }

    function url_stat() {
        $result = [];

        $result['dev'] = $result[0] = 0;
        $result['ino'] = $result[1] = 0;
        $result['mode'] = $result[2] = 0;
        $result['nlink'] = $result[3] = 0;
        $result['uid'] = $result[4] = 0;
        $result['gid'] = $result[5] = 0;
        $result['rdev'] = $result[6] = 0;
        $result['size'] = $result[7] = 0;
        $result['atime'] = $result[8] = 0;
        $result['mtime'] = $result[9] = 0;
        $result['ctime'] = $result[10] = 0;
        $result['blksize'] = $result[11] = 0;
        $result['blocks'] = $result[12] = 0;

        return $result;
    }
}