我正在尝试获得一个下载文件的链接,而无需重定向,或者使用另一个文件下载大型zip文件。
它适用于大约100mb以下的文件,但任何更大的文件,它都会被发送到chrome中的错误页面,上面写着:Error code: ERR_INVALID_RESPONSE
。
使用jQuery将$file和$path放入一个表单中,然后调用$('form').submit();
。
function downloadFile($file, $path){
set_time_limit(0);
$fullPath = $path . $file;
if ($fd = fopen ($fullPath, "r")) {
$fsize = filesize($fullPath);
$path_parts = pathinfo($fullPath);
$ext = strtolower($path_parts["extension"]);
switch ($ext) {
case "pdf":
header("Content-type: application/pdf"); // add here more headers for diff. extensions
header("Content-Disposition: attachment; filename='"".$path_parts["basename"]."'""); // use 'attachment' to force a download
break;
default;
header("Content-type: application/octet-stream");
header("Content-Disposition: filename='"".$path_parts["basename"]."'"");
}
header("Content-length: $fsize");
header("Cache-control: private"); //use this to open files directly
while(!feof($fd)) {
$buffer = fread($fd, 2048);
echo $buffer;
}
}
fclose ($fd);
exit;
}
你知道为什么它在更大的文件上失败了吗?
更新:当我使用以下代码时,它会下载文件,但由于某些原因,完成的文件已损坏,因此无法打开:
set_time_limit(0);
ini_set('memory_limit', '1024M');
// http headers for downloads
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename='"".$filename."'"");
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".$file_size);
ob_end_flush();
@readfile($fileinfo['path']);
当我使用这个代码时,它只下载第一个49.7kb,然后说它完成了,我甚至一起尝试了ob_flush()
和flush()
:
// http headers for downloads
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename='"".$filename."'"");
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($fileinfo['path']));
if ($fd = fopen ($fileinfo['path'], "r")) {
set_time_limit(0);
ini_set('memory_limit', '1024M');
while(!feof($fd)) {
echo fread($fd, 4096);
flush();
}
}
我在下载程序中唯一做的不同是Content-Transfer-Encoding: chunked
。还要将flush()
从循环中取出,并确保在发送数据之前执行ob_clean(); flush();
,在发送数据之后执行ob_end_flush();
。