[英]Content-Length header always zero
I set a header in the following way: 我通过以下方式设置标题:
header('Content-Length: ' . filesize($strPath));
On my PC with ZendServer it works fine and I can download a file with the correct file size. 在装有ZendServer的PC上,它可以正常工作,并且我可以下载具有正确文件大小的文件。 On the production server, a Solaris with Apache and compiled PHP, I get a file with the file size equal to zero, so an empty file.
在生产服务器(带有Apache和已编译PHP的Solaris)上,我得到一个文件,该文件的大小等于零,因此为空文件。
Is there a config parameter? 有配置参数吗? Something that can prevent to set 'Content-Length: 1222'?
可以阻止设置“ Content-Length:1222”的内容吗?
Thanks. 谢谢。
The code: 编码:
<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');
require 'includes/prepend.inc.php';
require __ADMIN_DIR__.'/AdminInfo.php';
$intFile = QApplication::QueryString('fileID');
if($intFile == '') die('Error: missing ID');
$objFile = File::Load($intFile);
$blnRight = false;
$objAdminInfo = new AdminInfo();
if($objAdminInfo->isAdmin()) {
$blnRight = true;
}
else {
$objSecMan = new SecurityManager(
'file:'.$objFile->FileID,
$objAdminInfo->getUserID()
);
$blnRight = $objSecMan->processResource('view');
}
// if the user can modify and or publish, can even view the file
if(!$blnRight) {
$blnRight = $objSecMan->processResource('modify');
if(!$blnRight) {
$blnRight = $objSecMan->processResource('publish');
}
}
//$strPath = __UPLOADS__.DIRECTORY_SEPARATOR.$objFile->FileID;
$strPath = 'subdept.csv';
if (file_exists($strPath) && $blnRight) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.$strPath);//$objFile->Filename);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($strPath));
ob_clean();
flush();
readfile($strPath);
exit;
}
else {
die('Restricted access');
}
?>
When I comment the code before $strPath it works, so it must be something in the bloody framework. 当我在$ strPath之前注释代码时,它可以工作,因此它一定是在血腥的框架中。 I would like to throw the whole CMS away.
我想丢掉整个CMS。
Check for transfer-encoding header. 检查传输编码标头。 If the transfer encoding is chunked, then the Content-Length field will not be set
如果传输编码是分块的,则不会设置Content-Length字段
Possible causes, is that ZendServer does not do chunked encoding, whereas Apache does 可能的原因是ZendServer不会执行分块编码,而Apache会进行分块编码
See the following links for details 有关详细信息,请参见以下链接
http://en.wikipedia.org/wiki/Chunked_transfer_encoding http://en.wikipedia.org/wiki/Chunked_transfer_encoding
http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html
Make sure that the file really exists under the specified path ( is_file
checks both the existance and if the file is a regular file) and is readable ( is_readable
) before sending it to the client. 在将文件发送到客户端之前,请确保该文件确实存在于指定路径下(
is_file
既检查是否存在,又检查该文件是否为常规文件)并且可读( is_readable
可读)。 filesize
returns false if an error occured. 如果发生错误,
filesize
返回false 。 So that might be the cause of your 0 value or empty value for Content-Length . 因此,这可能是导致Content-Length的值为0或值为空的原因。
And, as Ferdinand Beyer already mentioned , make sure that your script is portable and can handle different environments. 并且,如Ferdinand Beyer所述 ,请确保您的脚本可移植并且可以处理不同的环境。
Are you sure the file exists on the production server? 您确定文件在生产服务器上存在吗? Maybe it's a case sensitivity issue (eg, "File" and "file" are the same on Windows, but different on UNIX)?
也许是区分大小写的问题(例如,“文件”和“文件”在Windows上相同,但在UNIX上不同)? Does the user running Apache/PHP have read access?
运行Apache / PHP的用户是否具有读取权限?
Do you get any errors if you enable errors? 如果启用错误,会收到任何错误消息吗?
error_reporting(E_ALL);
ini_set('display_errors', '1');
A problem may be that Apache is gzipping your download, taking care of correcting the Content-Length, or in your case, removing that header and adding 问题可能是Apache正在压缩您的下载文件,以纠正Content-Length,或者在您的情况下,删除该标头并添加
Content-Encoding: chunked
内容编码:分块
You can add a .htaccess
RewriteRule to disable gzip: 您可以添加
.htaccess
RewriteRule以禁用gzip:
RewriteRule . - [E=no-gzip:1]
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