【www.bbyears.com--中文酷站】
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;
}
}