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diff --git a/www/wiki/includes/StreamFile.php b/www/wiki/includes/StreamFile.php
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+<?php
+/**
+ * Functions related to the output of file content.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * Functions related to the output of file content
+ */
+class StreamFile {
+	// Do not send any HTTP headers unless requested by caller (e.g. body only)
+	const STREAM_HEADLESS = HTTPFileStreamer::STREAM_HEADLESS;
+	// Do not try to tear down any PHP output buffers
+	const STREAM_ALLOW_OB = HTTPFileStreamer::STREAM_ALLOW_OB;
+
+	/**
+	 * Stream a file to the browser, adding all the headings and fun stuff.
+	 * Headers sent include: Content-type, Content-Length, Last-Modified,
+	 * and Content-Disposition.
+	 *
+	 * @param string $fname Full name and path of the file to stream
+	 * @param array $headers Any additional headers to send if the file exists
+	 * @param bool $sendErrors Send error messages if errors occur (like 404)
+	 * @param array $optHeaders HTTP request header map (e.g. "range") (use lowercase keys)
+	 * @param int $flags Bitfield of STREAM_* constants
+	 * @throws MWException
+	 * @return bool Success
+	 */
+	public static function stream(
+		$fname, $headers = [], $sendErrors = true, $optHeaders = [], $flags = 0
+	) {
+		if ( FileBackend::isStoragePath( $fname ) ) { // sanity
+			throw new InvalidArgumentException( __FUNCTION__ . " given storage path '$fname'." );
+		}
+
+		$streamer = new HTTPFileStreamer(
+			$fname,
+			[
+				'obResetFunc' => 'wfResetOutputBuffers',
+				'streamMimeFunc' => [ __CLASS__, 'contentTypeFromPath' ]
+			]
+		);
+
+		return $streamer->stream( $headers, $sendErrors, $optHeaders, $flags );
+	}
+
+	/**
+	 * Send out a standard 404 message for a file
+	 *
+	 * @param string $fname Full name and path of the file to stream
+	 * @param int $flags Bitfield of STREAM_* constants
+	 * @since 1.24
+	 */
+	public static function send404Message( $fname, $flags = 0 ) {
+		HTTPFileStreamer::send404Message( $fname, $flags );
+	}
+
+	/**
+	 * Convert a Range header value to an absolute (start, end) range tuple
+	 *
+	 * @param string $range Range header value
+	 * @param int $size File size
+	 * @return array|string Returns error string on failure (start, end, length)
+	 * @since 1.24
+	 */
+	public static function parseRange( $range, $size ) {
+		return HTTPFileStreamer::parseRange( $range, $size );
+	}
+
+	/**
+	 * Determine the file type of a file based on the path
+	 *
+	 * @param string $filename Storage path or file system path
+	 * @param bool $safe Whether to do retroactive upload blacklist checks
+	 * @return null|string
+	 */
+	public static function contentTypeFromPath( $filename, $safe = true ) {
+		global $wgTrivialMimeDetection;
+
+		$ext = strrchr( $filename, '.' );
+		$ext = $ext === false ? '' : strtolower( substr( $ext, 1 ) );
+
+		# trivial detection by file extension,
+		# used for thumbnails (thumb.php)
+		if ( $wgTrivialMimeDetection ) {
+			switch ( $ext ) {
+				case 'gif':
+					return 'image/gif';
+				case 'png':
+					return 'image/png';
+				case 'jpg':
+					return 'image/jpeg';
+				case 'jpeg':
+					return 'image/jpeg';
+			}
+
+			return 'unknown/unknown';
+		}
+
+		$magic = MediaWiki\MediaWikiServices::getInstance()->getMimeAnalyzer();
+		// Use the extension only, rather than magic numbers, to avoid opening
+		// up vulnerabilities due to uploads of files with allowed extensions
+		// but disallowed types.
+		$type = $magic->guessTypesForExtension( $ext );
+
+		/**
+		 * Double-check some security settings that were done on upload but might
+		 * have changed since.
+		 */
+		if ( $safe ) {
+			global $wgFileBlacklist, $wgCheckFileExtensions, $wgStrictFileExtensions,
+				$wgFileExtensions, $wgVerifyMimeType, $wgMimeTypeBlacklist;
+			list( , $extList ) = UploadBase::splitExtensions( $filename );
+			if ( UploadBase::checkFileExtensionList( $extList, $wgFileBlacklist ) ) {
+				return 'unknown/unknown';
+			}
+			if ( $wgCheckFileExtensions && $wgStrictFileExtensions
+				&& !UploadBase::checkFileExtensionList( $extList, $wgFileExtensions )
+			) {
+				return 'unknown/unknown';
+			}
+			if ( $wgVerifyMimeType && in_array( strtolower( $type ), $wgMimeTypeBlacklist ) ) {
+				return 'unknown/unknown';
+			}
+		}
+		return $type;
+	}
+}