*/
class StreamFile {
// Do not send any HTTP headers unless requested by caller (e.g. body only)
- const STREAM_HEADLESS = 1;
+ const STREAM_HEADLESS = HTTPFileStreamer::STREAM_HEADLESS;
// Do not try to tear down any PHP output buffers
- const STREAM_ALLOW_OB = 2;
+ const STREAM_ALLOW_OB = HTTPFileStreamer::STREAM_ALLOW_OB;
/**
* Stream a file to the browser, adding all the headings and fun stuff.
* @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 integer $flags Bitfield of STREAM_* constants
+ * @param int $flags Bitfield of STREAM_* constants
* @throws MWException
* @return bool Success
*/
public static function stream(
$fname, $headers = [], $sendErrors = true, $optHeaders = [], $flags = 0
) {
- $section = new ProfileSection( __METHOD__ );
-
if ( FileBackend::isStoragePath( $fname ) ) { // sanity
- throw new MWException( __FUNCTION__ . " given storage path '$fname'." );
- }
-
- // Don't stream it out as text/html if there was a PHP error
- if ( ( ( $flags & self::STREAM_HEADLESS ) == 0 || $headers ) && headers_sent() ) {
- echo "Headers already sent, terminating.\n";
- return false;
- }
-
- $headerFunc = ( $flags & self::STREAM_HEADLESS )
- ? function ( $header ) {
- // no-op
- }
- : function ( $header ) {
- is_int( $header ) ? HttpStatus::header( $header ) : header( $header );
- };
-
- MediaWiki\suppressWarnings();
- $info = stat( $fname );
- MediaWiki\restoreWarnings();
-
- if ( !is_array( $info ) ) {
- if ( $sendErrors ) {
- self::send404Message( $fname, $flags );
- }
- return false;
- }
-
- // Send Last-Modified HTTP header for client-side caching
- $headerFunc( 'Last-Modified: ' . wfTimestamp( TS_RFC2822, $info['mtime'] ) );
-
- if ( ( $flags & self::STREAM_ALLOW_OB ) == 0 ) {
- // Cancel output buffering and gzipping if set
- wfResetOutputBuffers();
- }
-
- $type = self::contentTypeFromPath( $fname );
- if ( $type && $type != 'unknown/unknown' ) {
- $headerFunc( "Content-type: $type" );
- } else {
- // Send a content type which is not known to Internet Explorer, to
- // avoid triggering IE's content type detection. Sending a standard
- // unknown content type here essentially gives IE license to apply
- // whatever content type it likes.
- $headerFunc( 'Content-type: application/x-wiki' );
+ throw new InvalidArgumentException( __FUNCTION__ . " given storage path '$fname'." );
}
- // Don't send if client has up to date cache
- if ( isset( $optHeaders['if-modified-since'] ) ) {
- $modsince = preg_replace( '/;.*$/', '', $optHeaders['if-modified-since'] );
- if ( wfTimestamp( TS_UNIX, $info['mtime'] ) <= strtotime( $modsince ) ) {
- ini_set( 'zlib.output_compression', 0 );
- $headerFunc( 304 );
- return true; // ok
- }
- }
-
- // Send additional headers
- foreach ( $headers as $header ) {
- header( $header ); // always use header(); specifically requested
- }
-
- if ( isset( $optHeaders['range'] ) ) {
- $range = self::parseRange( $optHeaders['range'], $info['size'] );
- if ( is_array( $range ) ) {
- $headerFunc( 206 );
- $headerFunc( 'Content-Length: ' . $range[2] );
- $headerFunc( "Content-Range: bytes {$range[0]}-{$range[1]}/{$info['size']}" );
- } elseif ( $range === 'invalid' ) {
- if ( $sendErrors ) {
- $headerFunc( 416 );
- $headerFunc( 'Cache-Control: no-cache' );
- $headerFunc( 'Content-Type: text/html; charset=utf-8' );
- $headerFunc( 'Content-Range: bytes */' . $info['size'] );
- }
- return false;
- } else { // unsupported Range request (e.g. multiple ranges)
- $range = null;
- $headerFunc( 'Content-Length: ' . $info['size'] );
- }
- } else {
- $range = null;
- $headerFunc( 'Content-Length: ' . $info['size'] );
- }
+ $streamer = new HTTPFileStreamer(
+ $fname,
+ [
+ 'obResetFunc' => 'wfResetOutputBuffers',
+ 'streamMimeFunc' => [ __CLASS__, 'contentTypeFromPath' ]
+ ]
+ );
- if ( is_array( $range ) ) {
- $handle = fopen( $fname, 'rb' );
- if ( $handle ) {
- $ok = true;
- fseek( $handle, $range[0] );
- $remaining = $range[2];
- while ( $remaining > 0 && $ok ) {
- $bytes = min( $remaining, 8 * 1024 );
- $data = fread( $handle, $bytes );
- $remaining -= $bytes;
- $ok = ( $data !== false );
- print $data;
- }
- } else {
- return false;
- }
- } else {
- return readfile( $fname ) !== false; // faster
- }
-
- return true;
+ 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 integer $flags Bitfield of STREAM_* constants
+ * @param int $flags Bitfield of STREAM_* constants
* @since 1.24
*/
public static function send404Message( $fname, $flags = 0 ) {
- if ( ( $flags & self::STREAM_HEADLESS ) == 0 ) {
- HttpStatus::header( 404 );
- header( 'Cache-Control: no-cache' );
- header( 'Content-Type: text/html; charset=utf-8' );
- }
- $encFile = htmlspecialchars( $fname );
- $encScript = htmlspecialchars( $_SERVER['SCRIPT_NAME'] );
- echo "<!DOCTYPE html><html><body>
- <h1>File not found</h1>
- <p>Although this PHP script ($encScript) exists, the file requested for output
- ($encFile) does not.</p>
- </body></html>
- ";
+ HTTPFileStreamer::send404Message( $fname, $flags );
}
/**
* Convert a Range header value to an absolute (start, end) range tuple
*
* @param string $range Range header value
- * @param integer $size File size
+ * @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 ) {
- $m = [];
- if ( preg_match( '#^bytes=(\d*)-(\d*)$#', $range, $m ) ) {
- list( , $start, $end ) = $m;
- if ( $start === '' && $end === '' ) {
- $absRange = [ 0, $size - 1 ];
- } elseif ( $start === '' ) {
- $absRange = [ $size - $end, $size - 1 ];
- } elseif ( $end === '' ) {
- $absRange = [ $start, $size - 1 ];
- } else {
- $absRange = [ $start, $end ];
- }
- if ( $absRange[0] >= 0 && $absRange[1] >= $absRange[0] ) {
- if ( $absRange[0] < $size ) {
- $absRange[1] = min( $absRange[1], $size - 1 ); // stop at EOF
- $absRange[2] = $absRange[1] - $absRange[0] + 1;
- return $absRange;
- } elseif ( $absRange[0] == 0 && $size == 0 ) {
- return 'unrecognized'; // the whole file should just be sent
- }
- }
- return 'invalid';
- }
- return 'unrecognized';
+ return HTTPFileStreamer::parseRange( $range, $size );
}
/**
dépôts / lhc / web / wiklou.git / blobdiff