We are rendering minified css / js through php with following expire headers
header('Expires:'.gmdate('D, d M Y H:i:s', 1407595380 + 3600 * 24 * 90).' GMT');
header('Cache-Control: public');
header('Last-Modified: 1407595380');
header('Content-type: text/css');
Response headers we are getting mentioned in-line
Cache-Control public
Connection Keep-Alive
Content-Encoding gzip
Content-Length 3224
Content-Type text/css
Date Mon, 11 Aug 2014 14:54:55 GMT
Expires Fri, 07 Nov 2014 14:43:00 GMT
Keep-Alive timeout=5, max=100
Last-Modified 1407595380
Pragma no-cache
Server Apache/2.2.22 (Ubuntu)
But every time i refresh my page , browser gives me 200 response code instead of 304. Browser is not using own cache for php generated minified files and rest css js having 304 code on subsequent requests.
Thanks
$timeToCache = 3600 * 24 * 90;
header('Expires:'.gmdate('D, d M Y H:i:s', 1407595380 + $timeToCache).' GMT');
header('Cache-Control: public');
header('Cache-Control: max-age='.$timeToCache);
header('Last-Modified: 1407595380');
header('Content-type: text/css');
header('Pragma: cache');
Pragma: no-cache might give you clue.
Although it is for legacy HTTP/1.0, Try setting Pragma: cache .
Related
I make a request to a php file and I took back these headers
Access-Control-Allow-Origin: *
Cache-Control: max-age=360000, must-revalidate
Connection: keep-alive
Content-Type: application/json
Date: Thu, 19 Jul 2018 07:08:20 GMT
Expires: Mon, 26 Jul 2040 05:00:00 GMT
Pragma: no-cache
Server: nginx
Transfer-Encoding: chunked
I'm using these headers to php file
header('Cache-Control: max-age=360000, must-revalidate');
header('Expires: Mon, 26 Jul 2040 05:00:00 GMT');
header('Content-type: application/json');
header("Access-Control-Allow-Origin: *");
But every time I refresh the page... It's not cached... It always ask server for the response.
Any ideas? I want to be cached until expire date
I assume that Pragma: no-cache might be a problem, remove that header
By documentation
The Pragma: no-cache header field is an HTTP/1.0 header intended for
use in requests. It is a means for the browser to tell the server and
any intermediate caches that it wants a fresh version of the resource,
not for the server to tell the browser not to cache the resource. Some
user agents do pay attention to this header in responses, but the
HTTP/1.1 RFC specifically warns against relying on this behaviour.
I have an application where a number of otherwise static javascript files are being generated via PHP to allow configuration options to alter the static files (path like: mystaticfile.js.php). Everything works fine EXCEPT that I can't seem to get the cache settings to work and these resources are being reloaded with every page load.
The PHP file uses the following headers to try to set the cache settings:
$expires= 60 * 60 * 24 * 60; //cache for 60 days
header('Pragma: public');
header('Cache-Control: max-age=' . $expires);
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $expires) . ' GMT');
header("content-type: application/x-javascript");
However, when the files are served they're showing headers that look like:
HTTP/1.1 200 OK
Date: Sun, 06 Nov 2016 19:18:00 GMT
Server: Apache/2.2.15 (CentOS)
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 744
Keep-Alive: timeout=15, max=95
Connection: Keep-Alive
Content-Type: application/x-javascript
My first thought was that it was that it might be because Apache has the ExpiresActive flag set on but I don't see any ExpiresByType rules set for PHP files.
Reading online it sounds like ETag issues could be the problem, but I've added
Header unset Pragma
FileETag None
Header unset ETag
to the http.conf file (and restarted the service) and still no dice.
Any thoughts?
Source: PHP: Worry about some magical added “Cache-Control” Header ?
These headers are automatically set by the PHP Session module to
prevent browser/proxy based caching of your pages. Depending on your
environment setup, it’s possible to control these headers by using the
session_cache_limiter() function or use the php.ini
To disable these behaviour just pass an empty string to the
session_cache_limiter() function as mentioned in the documentation:
session_cache_limiter('');
I have an application written in php using the Yii framework and hosted on Openshift. I need to force the download of a pdf file, created with mpdf (using this extension http://www.yiiframework.com/extension/pdf/).
On my local server, the following line suffices to force the download with the name I want:
$mPDF1->Output($file_name , 'D');
On Openshift, however, the download is not forced and the name of the file is not correct.
This is the code from mpdf that I think it is used to create the headers of the response:
else if ($dest=='D') {
header('Content-Description: File Transfer');
if (headers_sent())
$this->Error('Some data has already been output to browser, can\'t send PDF file');
header('Content-Transfer-Encoding: binary');
header('Cache-Control: public, must-revalidate, max-age=0');
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
header('Content-Type: application/force-download');
header('Content-Type: application/octet-stream', false);
header('Content-Type: application/download', false);
header('Content-Type: application/pdf', false);
header('Content-disposition: attachment; filename="'.$name.'"');
}
These are the response headers I get on my local server:
HTTP/1.1 200 OK
Date: Tue, 07 Jul 2015 07:15:34 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.9
Expires: Sat, 26 Jul 1997 05:00:00 GMT
Cache-Control: public, must-revalidate, max-age=0
Pragma: public
Content-Description: File Transfer
Content-Transfer-Encoding: binary
Last-Modified: Tue, 07 Jul 2015 07:15:34 GMT
Content-disposition: attachment; filename="invoice.pdf"
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: application/pdf
And these are the response headers I get on Openshift:
HTTP/1.1 200 OK
Date: Tue, 07 Jul 2015 07:05:05 GMT
Server: Apache/2.2.15 (Red Hat)
Expires: Sat, 26 Jul 1997 05:00:00 GMT
Cache-Control: public, must-revalidate, max-age=0
Pragma: public
Content-Description: File Transfer
Content-Transfer-Encoding: binary
Last-Modified: Tue, 07 Jul 2015 07:05:07 GMT
Content-Type: application/pdf
Vary: Accept-Encoding
Content-Encoding: gzip
Keep-Alive: timeout=15, max=99
Connection: Keep-Alive
Transfer-Encoding: chunked
So on Openshift it is missing:
Content-disposition: attachment; filename="invoice.pdf"
and the file is not downloaded but shown in the browser.
What can I do to make it work?
I think it will work if You remove Content-Type: application/pdf. Some browsers automatically open this kind of documents. Leave only application/octet-stream.
header('Content-Transfer-Encoding: binary');
header('Cache-Control: public, must-revalidate, max-age=0');
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
header('Content-Type: application/octet-stream');
header('Content-disposition: attachment; filename="'.$name.'"');
i'm using this after generating PDFs from a library. So far no problem.
header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename="generated.pdf"');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . filesize($file_to_save));
header('Accept-Ranges: bytes');
readfile($file_to_save);
where $file_to_save is the absolute path of your pdf
I'm probably missing something obvious, but my Codeigniter app is not sending headers when I ask it to.
So in any controller or the extended MY_Controller:
$this->output->set_header("Last-Modified: " . gmdate( "D, j M Y H:i:s" ) . " GMT");
$this->output->set_header("Expires: " . gmdate( "D, j M Y H:i:s", time() ) . " GMT");
$this->output->set_header("Cache-Control: no-store, no-cache, must-revalidate");
$this->output->set_header("Cache-Control: post-check=0, pre-check=0");
$this->output->set_header("Pragma: no-cache");
$this->output->set_header("Steve: it aint working you know");
And the headers I get are:
HTTP/1.1 200 OK
Date: Mon, 19 Mar 2012 18:03:06 GMT
Server: Apache/2.2.20 (Ubuntu)
X-Powered-By: PHP/5.3.6-13ubuntu3.6
Last-Modified: Mon, 19 Mar 2012 18:03:06 GMT
Expires: Sat, 01 Jan 2000 00:00:01 GMT
Cache-Control: post-check=0, pre-check=0, max-age=0
Pragma: no-cache
Steve: it aint working you know
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 10780
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html
So I know it's sending headers from the Steve: header but it's not sending my Cache-Control settings. If I comment out the Cache-Control setting, it still displays the same value.
Where could this be being overridden? Is it Codeigniter, PHP or Apache?
I would check your Apache config, particularly how mod_expires and the Header Directive are configured.
Note that the "header is modified just after the content handler and output filters are run, allowing outgoing headers to be modified." So Apache may be set to modify the headers you've set in PHP.
I'm no Apache expert, but this is what I had to work with to fix a similar issue.
Steps I took:
added the following to my .htaccess file.
<IfModule mod_headers.c>
Header add Cache-Control: "no-store, no-cache, must-revalidate"
</IfModule>
ran
sudo a2enmod headers
sudo service apache2 restart
I have php script that serve image from the script
i expect the browser to cache the image even its come from the api.
I have read the thread How to browser cache image from php
and
How to force a web browser to cache Images
that to modify Expires header, I've tried it but is seem got no luck
I've manually
header('Content-Type : image/jpeg');
header('Content-Size : 2759' );
header('Cache-Control : public, max-age=2592000' );
header('Pragma : public' );
header('Expires: ' . date('r', time() + 30*24*60*60 ));
my response header from my output is :
Server: nginx/0.8.54
Date: Tue, 06 Dec 2011 11:20:17 GMT
Content-Type: image/jpeg
Transfer-Encoding: chunked
Connection: keep-alive
X-Powered-By: PHP/5.3.7-ZS5.5.0 ZendServer/5.0
Set-Cookie: ZDEDebuggerPresent=php,phtml,php3; path=/
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0, public, max-age=2592000
Pragma: no-cache
Expires: Wed, 05 Dec 2012 18:20:17 +0700
Content-Size: 2759
as you can see, the headers is modified, but in cache-control header it still have no-store and no-cache value,
is this nginx configs things or can be resolved from php, and how ??
thank you in advance....