php断点下载
<?php/** * PHP-HTTP断点续传实现 * @param string $path: 文件所在路径 * @param string $file: 文件名 * @return void */function download($path, $file) {$real = $path . '/' . $file;if (! file_exists ( $real )) {return false;}$size = filesize ( $real );$size2 = $size - 1;$range = 0;if (isset ( $_SERVER ['HTTP_RANGE'] )) {header ( 'HTTP /1.1 206 Partial Content' );$range = str_replace ( '=', '-', $_SERVER ['HTTP_RANGE'] );$range = explode ( '-', $range );$range = trim ( $range );header ( 'Content-Length:' . $size );header ( 'Content-Range: bytes ' . $range . '-' . $size2 . '/' . $size );} else {header ( 'Content-Length:' . $size );header ( 'Content-Range: bytes 0-' . $size2 . '/' . $size );}header ( 'Accenpt-Ranges: bytes' );header ( 'application/octet-stream' );header ( "Cache-control: public" );header ( "Pragma: public" );//解决在IE中下载时中文乱码问题$ua = $_SERVER ['HTTP_USER_AGENT'];if (preg_match ( '/MSIE/', $ua )) {$ie_filename = str_replace ( '+', '%20', urlencode ( $file ) );header ( 'Content-Dispositon:attachment; filename=' . $ie_filename );} else {header ( 'Content-Dispositon:attachment; filename=' . $file );}$fp = fopen ( $real, 'rb+' );fseek ( $fp, $range );while ( ! feof ( $fp ) ) {set_time_limit ( 0 );print (fread ( $fp, 1024 )) ;flush ();ob_flush ();}fclose ( $fp );}/*End of PHP*/ ob_start(); $size = filesize($file_dir . $file_name); // 输入文件标签 Header("Content-type: application/octet-stream"); Header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); Header("Content-length: " . $size); $encoded_filename = urlencode($down_name); $encoded_filename = str_replace("+", "%20", $encoded_filename); $ua = $_SERVER["HTTP_USER_AGENT"]; // 处理下载的时候的文件名 if (preg_match("/MSIE/", $ua)) { header('Content-Disposition: attachment; filename="' . $encoded_filename . '"'); } else if (preg_match("/Firefox/", $ua)) { header('Content-Disposition: attachment; filename*="utf8\'\'' . $down_name . '"'); } else { header('Content-Disposition: attachment; filename="' . $down_name . '"'); } $fp = fopen($file_dir . $file_name, "r"); // 打开文件 if (isset($_SERVER['HTTP_RANGE']) && ($_SERVER['HTTP_RANGE'] != "") && preg_match("/^bytes=(+)-/i", $_SERVER['HTTP_RANGE'], $match) && ($match < $size)) { $range = $match; fseek($fp, $range); header("HTTP/1.1 206 Partial Content"); //header("Date: " . gmdate("D, d M Y H:i:s") . " GMT"); header("Last-Modified: " . gmdate("D, d M Y H:i:s", filemtime($file_dir . $file_name)) . " GMT"); header("Accept-Ranges: bytes"); $rangesize = ($size - $range) > 0 ? ($size - $range) : 0; header("Content-Length:" . $rangesize); header("Content-Range: bytes " . $range . '-' . ($size - 1) . "/" . $size); // header("Connection: close" . "\n\n" ); //header("Connection: close"." "); } else { header("Content-Length: " . (string) ($size)); header("Accept-Ranges: bytes"); $range = 0; header("Content-Range: bytes " . $range . '-' . ($size - 1) . "/" . $size); } fpassthru($fp); ob_end_flush(); fclose($fp); exit;
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