Semon in Node

通过发送http实现，假设$filesize代表文件大小，$filename代表文件名,文件内容为filecontent

header(“Content-type: application/octet-stream”);   //文件类型的mimetype
header(“Accept-Ranges: bytes”);          //如果不需要显示文件尺寸可省略
header(“Accept-Length: “.$filesize);     //同上
header(“Content-Disposition: attachment; filename=” . $filename);
echo $filecontent;