Code about php support for multipart and resumable file download

Php stream download supports multipart and resumable Download. if you have any need, read this article to introduce this article, which is an article about php stream download, it supports multipart and resumable Download. if you need it, you can check it. The code is as follows:

The code is as follows:

$ DowmFile = dirname (_ FILE _). '/Nokia-Always Here.mp3'; // the object to be downloaded, either absolute or relative
$ 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 ){
// Multipart download
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 ){
// Specify the position to end
If ($ start >=$ fsize | $ start <0 ){
$ Start = 0;
$ End = $ fsize;
} Else {
$ End = $ fsize-$ start;
}
} Else if (! $ Isset_start & $ isset_end ){
// Last n bytes
$ 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 'Av ':
Return 'video/msvideo ';
Case 'vps ':
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;
}
}