Specify a cache validator, how to set it?

Resolved masedinet
(@masedinet)

6 years, 8 months ago

Hi there,

trying your free CDN service for my wordpress site.

when testing it using GTMetrix, I got this optimization recommendation

Specify a cache validator

The following resources are missing a cache validator. Resources that do not specify a cache validator cannot be refreshed efficiently. Specify a Last-Modified or ETag header to enable cache validation for the following resources:

is it related to your cdn configuration or my side?

Viewing 6 replies - 1 through 6 (of 6 total)

Plugin Author shift8
(@shift8)

6 years, 8 months ago

I have to double check our system but I think that might be a header thats set and sent by the origin server (your server). Can you check to see if that header is being set on non-cached files from your server perhaps?

I’ll do some research on our side and make sure its not something we can accommodate as well.

Thread Starter masedinet
(@masedinet)

6 years, 8 months ago

@shift8

i am sorry, it seems my hosting doesn’t return expires header. i have reconfigure it on now, it has expire header

curl -I https://griyaannisawedding.com/wp-content/uploads/2019/01/prosesi-akad-nikah-mba-detik.jpeg
HTTP/2 200
content-type: image/jpeg
content-length: 260851
vary: Accept-Encoding
server: LEMPer
pragma: public
accept-ranges: bytes
x-original-content-length: 331596
etag: W/”PSA-aj-Tp_ACs2rgU”
date: Mon, 23 Sep 2019 16:55:20 GMT
expires: Tue, 22 Oct 2019 10:21:25 GMT
vary: User-Agent,Save-Data
cache-control: max-age=2481964, public

btw, how to flush cdn content so it has newest one or it will done automatically?

thanks in advance
Thread Starter masedinet
(@masedinet)

6 years, 8 months ago
Update:

From YSlow check, getting this issue: “static components without a far-future expiration date.”

it seems my stored CDN file expire header set to 5 days for image media and 1 day for (JS & CSS) file.
```
$ curl -I https://1qs9tm3fg0bzi.wpcdn.shift8cdn.com/wp-content/uploads/2018/12/xwedding-sovia-barry.jpg.pagespeed.ic.ehoQbrtt3N.webp
HTTP/1.1 200 OK
Server: nginx/1.16.0
Date: Tue, 24 Sep 2019 10:01:06 GMT
Content-Type: image/webp
Content-Length: 105792
Connection: keep-alive
Vary: Accept-Encoding
Pragma: public
Expires: Sun, 29 Sep 2019 10:01:06 GMT
ETag: W/"0"
Last-Modified: Tue, 24 Sep 2019 09:16:06 GMT
Cache-Control: max-age=432000
X-Original-Content-Length: 159049
X-Page-Speed: LEMPer/PageSpeed
X-Shift8CDN-Cache: HIT
Pragma: public
Cache-Control: public
Access-Control-Allow-Origin: https://griyaannisawedding.com
Accept-Ranges: bytes
```
```
$ curl -I https://1qs9tm3fg0bzi.wpcdn.shift8cdn.com/wp-content/plugins/wpforms-lite/assets/css/A.wpforms-full.css.pagespeed.cf.YA2pSbySp5.css
HTTP/1.1 200 OK
Server: nginx/1.16.0
Date: Tue, 24 Sep 2019 10:06:13 GMT
Content-Type: text/css
Content-Length: 29726
Connection: keep-alive
Vary: Accept-Encoding
Pragma: public
Expires: Wed, 25 Sep 2019 10:06:13 GMT
ETag: W/"0"
Last-Modified: Tue, 24 Sep 2019 09:22:09 GMT
Cache-Control: max-age=86400
X-Original-Content-Length: 35341
Vary: Accept-Encoding
X-Page-Speed: LEMPer/PageSpeed
X-Shift8CDN-Cache: HIT
Pragma: public
Cache-Control: public
Access-Control-Allow-Origin: https://griyaannisawedding.com
Accept-Ranges: bytes
```
while the original file (on my server) the expiration set to 1 year
```
$ curl -I https://griyaannisawedding.com/wp-content/uploads/2018/12/xwedding-sovia-barry.jpg.pagespeed.ic.ehoQbrtt3N.webp
HTTP/2 200 
content-type: image/webp
content-length: 105792
server: LEMPer
pragma: public
accept-ranges: bytes
date: Tue, 24 Sep 2019 09:16:06 GMT
expires: Wed, 23 Sep 2020 09:16:06 GMT
etag: W/"0"
last-modified: Tue, 24 Sep 2019 09:16:06 GMT
cache-control: max-age=31536000, public
x-original-content-length: 159049
x-page-speed: LEMPer/PageSpeed
```
```
$ curl -I https://griyaannisawedding.com/wp-content/plugins/wpforms-lite/assets/css/A.wpforms-full.css.pagespeed.cf.YA2pSbySp5.css
HTTP/2 200 
content-type: text/css
server: LEMPer
pragma: public
accept-ranges: bytes
date: Tue, 24 Sep 2019 09:22:09 GMT
expires: Wed, 23 Sep 2020 09:22:09 GMT
etag: W/"0"
last-modified: Tue, 24 Sep 2019 09:22:09 GMT
cache-control: max-age=31536000, public
x-original-content-length: 35341
vary: Accept-Encoding
content-length: 29726
x-page-speed: LEMPer/PageSpeed
```
is there any option to set the expiration time?
- This reply was modified 6 years, 8 months ago by Jan Dembowski.
- This reply was modified 6 years, 8 months ago by Jan Dembowski. Reason: Formatting
Moderator Jan Dembowski
(@jdembowski)

Forum Moderator and Brute Squad

6 years, 8 months ago

@masedinet The forums are for supporting the code for the plugin only. For questions regarding the CDN you need to discuss that on their site.

For pro or commercial product support please contact the author directly on their site. This includes any pre-sales topics as well and any topic about a service.

As the author is aware, commercial products are not supported in these forums. I am sure they will have no problem supporting you there.

@shift8 Provide a link for that and I will close this topic.

Plugin Author shift8
(@shift8)

6 years, 8 months ago

Hello,

Though there is no pro or commercial version of this product (it is 100% free), you can send an email to [email protected] and I can assist you further there. The issues described in this forum post are specifically how the free plugin’s infrastructure is potentially settings or processing headers relating to caching.

Thanks!

Moderator Jan Dembowski
(@jdembowski)

Forum Moderator and Brute Squad

6 years, 8 months ago

This is a plugin that integrates a 100% free CDN service operated by Shift8

Only the code can be supported here only and that it’s a free service is irrelevant. Any questions about the free service need to be taken elsewhere.

Viewing 6 replies - 1 through 6 (of 6 total)

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