本文章要介绍了这篇文章是一篇关于php流下载,就是可以支持分块与断点续传文件下载,有需要的朋友可以看看,代码如下:
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$dowmFile = dirname ( __FILE__ ) . '/Nokia - Always Here.mp3';
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$dowmName = 'Nokia - Always Here.mp3';
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ob_start ();
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getlocalfile ( $dowmFile, $dowmName );
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flush ();
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ob_flush ();
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function getlocalfile($fname, $filename = '') {
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$fsize = filesize ( $fname );
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header ( 'Cache-Control: public' );
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header ( 'Pragma: public' );
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header ( 'Accept-Ranges: bytes' );
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header ( 'Connection: close' );
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header ( 'Content-Type: ' . MIMEType ( $fname ) );
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if (isset ( $filename {0} )) {
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header ( 'Content-Disposition: attachment;filename=' . $filename );
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}
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if ($fp = @fopen ( $fname, 'rb' )) {
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$start = 0;
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$end = $fsize;
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$isRange = isset ( $_SERVER ['HTTP_RANGE'] ) && ($_SERVER ['HTTP_RANGE'] != '');
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if ($isRange) {
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preg_match ( '/^bytes=([0-9]*)-([0-9]*)$/i', $_SERVER ['HTTP_RANGE'], $match );
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$start = $match [1];
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$end = $match [2];
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$isset_start = isset ( $start {0} );
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$isset_end = isset ( $end {0} );
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if ($isset_start && $isset_end) {
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if ($start >= $fsize || $start < 0 || $start > $end) {
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$start = 0;
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$end = $fsize;
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} else if ($end >= $fsize) {
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$end = $fsize - $start;
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} else {
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$end -= $start - 1;
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}
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} else if ($isset_start && ! $isset_end) {
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if ($start >= $fsize || $start < 0) {
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$start = 0;
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$end = $fsize;
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} else {
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$end = $fsize - $start;
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}
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} else if (! $isset_start && $isset_end) {
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$end = $end > $fsize ? $fsize : $end;
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$start = $fsize - $end;
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} else {
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$start = 0;
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$end = $fsize;
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}
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}
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if ($isRange) {
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fseek ( $fp, $start );
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header ( 'HTTP/1.1 206 Partial Content' );
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header ( 'Content-Length: ' . $end );
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header ( 'Content-Ranges: bytes ' . $start . '-' . ($end + $start - 1) . '/' . $fsize );
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} else {
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header ( 'Content-Length: ' . $fsize );
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}
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if (function_exists ( 'fpassthru' ) && ($end + $start) == $fsize) {
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fpassthru ( $fp );
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} else {
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echo fread ( $fp, $end );
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}
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} else {
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header ( 'Content-Length: ' . $fsize );
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readfile ( $fname );
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}
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}
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function MIMEType($fname) {
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$fileSuffix = strtolower ( substr ( $fname, strrpos ( $fname, '.' ) + 1 ) );
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switch ($fileSuffix) {
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case 'avi' :
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return 'video/msvideo';
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case 'wmv' :
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return 'video/x-ms-wmv';
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case 'txt' :
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return 'text/plain';
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case 'htm' :
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case 'html' :
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case 'php' :
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return 'text/html';
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case 'css' :
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return 'text/css';
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case 'js' :
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return 'application/javascript';
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case 'json' :
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case 'xml' :
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case 'zip' :
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case 'pdf' :
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case 'rtf' :
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case 'tar' :
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return 'application/' . $fileSuffix;
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case 'swf' :
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return 'application/x-shockwave-flash';
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case 'flv' :
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return 'video/x-flv';
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case 'jpe' :
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case 'jpg' :
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return 'image/jpeg';
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case 'jpeg' :
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case 'png' :
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case 'gif' :
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case 'bmp' :
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case 'tiff' :
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return 'image/' . $fileSuffix;
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case 'ico' :
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return 'image/vnd.microsoft.icon';
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case 'tif' :
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return 'image/tiff';
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case 'svg' :
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case 'svgz' :
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return 'image/svg+xml';
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case 'rar' :
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return 'application/x-rar-compressed';
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case 'exe' :
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case 'msi' :
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return 'application/x-msdownload';
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case 'cab' :
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return 'application/vnd.ms-cab-compressed';
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case 'aif' :
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return 'audio/aiff';
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case 'mpg' :
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case 'mpe' :
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case 'mp3' :
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return 'audio/mpeg';
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case 'mpeg' :
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case 'wav' :
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case 'aiff' :
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return 'audio/' . $fileSuffix;
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case 'qt' :
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case 'mov' :
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return 'video/quicktime';
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case 'psd' :
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return 'image/vnd.adobe.photoshop';
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case 'ai' :
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case 'eps' :
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case 'ps' :
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return 'application/postscript';
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case 'doc' :
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case 'docx' :
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return 'application/msword';
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case 'xls' :
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case 'xlt' :
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case 'xlm' :
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case 'xld' :
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case 'xla' :
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case 'xlc' :
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case 'xlw' :
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case 'xll' :
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return 'application/vnd.ms-excel';
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case 'ppt' :
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case 'pps' :
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return 'application/vnd.ms-powerpoint';
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case 'odt' :
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return 'application/vnd.oasis.opendocument.text';
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case 'ods' :
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return 'application/vnd.oasis.opendocument.spreadsheet';
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default :
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if (function_exists ( 'mime_content_type' )) {
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$fileSuffix = mime_content_type ( $filename );
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} else {
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$fileSuffix = 'application/octet-stream';
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}
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return $fileSuffix;
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break;
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}
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}
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