php支持分块与断点续传文件下载功能代码_PHP教程
时间:2021-07-01 10:21:17
帮助过:4人阅读
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 | |
$dowmFile = dirname ( __FILE__ ) . '/Nokia - Always Here.mp3'; //要下载的文件,绝对或相对 $dowmName = 'Nokia - Always Here.mp3'; ob_start (); getlocalfile ( $dowmFile, $dowmName ); flush (); ob_flush (); function getlocalfile($fname, $filename = '') { $fsize = filesize ( $fname ); header ( 'Cache-Control: public' ); header ( 'Pragma: public' ); header ( 'Accept-Ranges: bytes' ); header ( 'Connection: close' ); header ( 'Content-Type: ' . MIMEType ( $fname ) ); //header('Content-Type: application/octet-stream'); if (isset ( $filename {0} )) { header ( 'Content-Disposition: attachment;filename=' . $filename ); } if ($fp = @fopen ( $fname, 'rb' )) { $start = 0; $end = $fsize; $isRange = isset ( $_SERVER ['HTTP_RANGE'] ) && ($_SERVER ['HTTP_RANGE'] != ''); if ($isRange) { preg_match ( '/^bytes=([0-9]*)-([0-9]*)$/i', $_SERVER ['HTTP_RANGE'], $match ); $start = $match [1]; $end = $match [2]; $isset_start = isset ( $start {0} ); $isset_end = isset ( $end {0} ); if ($isset_start && $isset_end) { //分块下载 if ($start >= $fsize || $start < 0 || $start > $end) { $start = 0; $end = $fsize; } else if ($end >= $fsize) { $end = $fsize - $start; } else { $end -= $start - 1; } } else if ($isset_start && ! $isset_end) { //指定位置到结束 if ($start >= $fsize || $start < 0) { $start = 0; $end = $fsize; } else { $end = $fsize - $start; } } else if (! $isset_start && $isset_end) { //最后n个字节 $end = $end > $fsize ? $fsize : $end; $start = $fsize - $end; } else { $start = 0; $end = $fsize; } } if ($isRange) { fseek ( $fp, $start ); header ( 'HTTP/1.1 206 Partial Content' ); header ( 'Content-Length: ' . $end ); header ( 'Content-Ranges: bytes ' . $start . '-' . ($end + $start - 1) . '/' . $fsize ); } else { header ( 'Content-Length: ' . $fsize ); } if (function_exists ( 'fpassthru' ) && ($end + $start) == $fsize) { fpassthru ( $fp ); } else { echo fread ( $fp, $end ); } } else { header ( 'Content-Length: ' . $fsize ); readfile ( $fname ); } //@header("Content-Type: ".mime_content_type($fname)); } function MIMEType($fname) { $fileSuffix = strtolower ( substr ( $fname, strrpos ( $fname, '.' ) + 1 ) ); switch ($fileSuffix) { case 'avi' : return 'video/msvideo'; case 'wmv' : return 'video/x-ms-wmv'; case 'txt' : return 'text/plain'; case 'htm' : case 'html' : case 'php' : return 'text/html'; case 'css' : return 'text/css'; case 'js' : return 'application/javascript'; case 'json' : case 'xml' : case 'zip' : case 'pdf' : case 'rtf' : case 'tar' : return 'application/' . $fileSuffix; case 'swf' : return 'application/x-shockwave-flash'; case 'flv' : return 'video/x-flv'; case 'jpe' : case 'jpg' : return 'image/jpeg'; case 'jpeg' : case 'png' : case 'gif' : case 'bmp' : case 'tiff' : return 'image/' . $fileSuffix; case 'ico' : return 'image/vnd.microsoft.icon'; case 'tif' : return 'image/tiff'; case 'svg' : case 'svgz' : return 'image/svg+xml'; case 'rar' : return 'application/x-rar-compressed'; case 'exe' : case 'msi' : return 'application/x-msdownload'; case 'cab' : return 'application/vnd.ms-cab-compressed'; case 'aif' : return 'audio/aiff'; case 'mpg' : case 'mpe' : case 'mp3' : return 'audio/mpeg'; case 'mpeg' : case 'wav' : case 'aiff' : return 'audio/' . $fileSuffix; case 'qt' : case 'mov' : return 'video/quicktime'; case 'psd' : return 'image/vnd.adobe.photoshop'; case 'ai' : case 'eps' : case 'ps' : return 'application/postscript'; case 'doc' : case 'docx' : return 'application/msword'; case 'xls' : case 'xlt' : case 'xlm' : case 'xld' : case 'xla' : case 'xlc' : case 'xlw' : case 'xll' : return 'application/vnd.ms-excel'; case 'ppt' : case 'pps' : return 'application/vnd.ms-powerpoint'; case 'odt' : return 'application/vnd.oasis.opendocument.text'; case 'ods' : return 'application/vnd.oasis.opendocument.spreadsheet'; default : if (function_exists ( 'mime_content_type' )) { $fileSuffix = mime_content_type ( $filename ); } else { $fileSuffix = 'application/octet-stream'; } return $fileSuffix; break; } } |
http://www.bkjia.com/PHPjc/444707.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/444707.htmlTechArticle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 $dow...