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Having trouble removing HTTP header “Cache-control”

Is the Last-Modified HTTP header required for browser caching?IIS cache control header settingsLiteSpeed enable Access-Control-Allow-Origin (no response header on CORS request)Cache Control Headers with IIS 7.5Lowercase headersCan I get Apache 2.2 to set a particular response header if some other response header is missingLog access to cached content by 3rd partyStrip Tomcat Headers With Apache, then Cache Resources To Disk?.de domain resolving to wrong server with CloudFlare

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;

0

I'm trying to get my assets cached using Cloudflare

Cloudflare states here that "CloudFlare will not cache your site or static content if you have no-cache and private headers coming from your server"

As you can see from my file response, Cache-control: no-cache="set-cookie" is coming through:
https://redbot.org/?uri=http%3A%2F%2Fdev.shareasimage.com%2Fstatic%2Fapp%2Fimages%2Fads%2Fts.ad.png

I've tried removing it using Header unset Cache-control, but no luck

Has anyone run into this before?

apache-2.4 http-headers cloudflare

share|improve this question

edited Mar 2 '16 at 22:14

sysadmin1138♦

118k17146282

asked Sep 8 '14 at 18:35

onassaronassar

1538

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Where did you put that config, and what's the rest of your relevant config?
  
  – Shane Madden♦
  Sep 8 '14 at 19:38
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I put it in the htaccess file
  
  – onassar
  Sep 8 '14 at 19:44
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  here's the rest of the access file: pastebin.com/zB57Uddp
  
  – onassar
  Sep 8 '14 at 19:45
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So it's not in there now? And do you know where the current contents of the header are coming from now? The fact that Cache-control isn't capitalized in the header that you're getting now tells me it's being set elsewhere in your config.
  
  – Shane Madden♦
  Sep 8 '14 at 19:56
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I removed it because it didn't seem to work. Here are before and after of the htaccess file having the unset command. Before: i.imgur.com/PdKFhKE.png After: i.imgur.com/SFj7r31.png
  
  – onassar
  Sep 8 '14 at 20:05
  

  
  
  
  

add a comment | 

0

I'm trying to get my assets cached using Cloudflare

Cloudflare states here that "CloudFlare will not cache your site or static content if you have no-cache and private headers coming from your server"

As you can see from my file response, Cache-control: no-cache="set-cookie" is coming through:
https://redbot.org/?uri=http%3A%2F%2Fdev.shareasimage.com%2Fstatic%2Fapp%2Fimages%2Fads%2Fts.ad.png

I've tried removing it using Header unset Cache-control, but no luck

Has anyone run into this before?

apache-2.4 http-headers cloudflare

share|improve this question

edited Mar 2 '16 at 22:14

sysadmin1138♦

118k17146282

asked Sep 8 '14 at 18:35

onassaronassar

1538

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Where did you put that config, and what's the rest of your relevant config?
  
  – Shane Madden♦
  Sep 8 '14 at 19:38
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I put it in the htaccess file
  
  – onassar
  Sep 8 '14 at 19:44
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  here's the rest of the access file: pastebin.com/zB57Uddp
  
  – onassar
  Sep 8 '14 at 19:45
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So it's not in there now? And do you know where the current contents of the header are coming from now? The fact that Cache-control isn't capitalized in the header that you're getting now tells me it's being set elsewhere in your config.
  
  – Shane Madden♦
  Sep 8 '14 at 19:56
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I removed it because it didn't seem to work. Here are before and after of the htaccess file having the unset command. Before: i.imgur.com/PdKFhKE.png After: i.imgur.com/SFj7r31.png
  
  – onassar
  Sep 8 '14 at 20:05
  

  
  
  
  

add a comment | 

I'm trying to get my assets cached using Cloudflare

Cloudflare states here that "CloudFlare will not cache your site or static content if you have no-cache and private headers coming from your server"

As you can see from my file response, Cache-control: no-cache="set-cookie" is coming through:
https://redbot.org/?uri=http%3A%2F%2Fdev.shareasimage.com%2Fstatic%2Fapp%2Fimages%2Fads%2Fts.ad.png

I've tried removing it using Header unset Cache-control, but no luck

Has anyone run into this before?

apache-2.4 http-headers cloudflare

share|improve this question

edited Mar 2 '16 at 22:14

sysadmin1138♦

118k17146282

asked Sep 8 '14 at 18:35

onassaronassar

1538

share|improve this question

edited Mar 2 '16 at 22:14

sysadmin1138♦

118k17146282

asked Sep 8 '14 at 18:35

onassaronassar

1538

share|improve this question

edited Mar 2 '16 at 22:14

sysadmin1138♦

118k17146282

asked Sep 8 '14 at 18:35

onassaronassar

1538

edited Mar 2 '16 at 22:14

sysadmin1138♦

118k17146282

edited Mar 2 '16 at 22:14

sysadmin1138♦

118k17146282

asked Sep 8 '14 at 18:35

onassaronassar

1538

asked Sep 8 '14 at 18:35

onassaronassar

1538

2 Answers
2

active

oldest

votes

0

I'm guessing you've run into a bug because you have two different capitalizations of Cache-Control:

Cache-Control: max-age=259200, no-cache="set-cookie"
Cache-control: no-cache="set-cookie"

HTTP headers are case-insensitive, but you've probably run into an oddball edge case where Apache stops looking when it finds a match to what you're trying to remove - so the first one, Cache-Control, gets removed, while Cache-Control doesn't.

Either find where in your config or code the Cache-control header is being set and have it fully capitalize to the normal Cache-Control (then a Header unset Cache-Control should nuke both values), or make Apache search for the matching case-insensitive name twice, which should hopefully work:

Header unset Cache-Control
Header unset Cache-control

share|improve this answer

answered Sep 8 '14 at 20:18

Shane Madden♦Shane Madden

105k9148225

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for the thoughts Shane. I considered that and tried it, but it didn't work. I found the answer to the problem though (and realize I failed to include some auxiliary information about my set up). Going to answer it now
  
  – onassar
  Sep 8 '14 at 20:29
  

  
  
  
  

add a comment | 

0

I failed to mention that my server(s) are behind a load balancer on AWS

AWS ELB (what they call their load balancers) have a setting call stickiness

When you turn it on, they set a cookie to make sure visitors consistently get sent to the same server

This has the added side effect of adding the following header after your server fulfills the request:

Cache-control: no-cache="set-cookie"

I needed to turn off stickiness to prevent this header from being set

In retrospect, I should've outlined my setup more to help debug this

Thanks for your help Shane

share|improve this answer

answered Sep 8 '14 at 20:35

onassaronassar

1538

add a comment | 

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0

I'm guessing you've run into a bug because you have two different capitalizations of Cache-Control:

Cache-Control: max-age=259200, no-cache="set-cookie"
Cache-control: no-cache="set-cookie"

HTTP headers are case-insensitive, but you've probably run into an oddball edge case where Apache stops looking when it finds a match to what you're trying to remove - so the first one, Cache-Control, gets removed, while Cache-Control doesn't.

Either find where in your config or code the Cache-control header is being set and have it fully capitalize to the normal Cache-Control (then a Header unset Cache-Control should nuke both values), or make Apache search for the matching case-insensitive name twice, which should hopefully work:

Header unset Cache-Control
Header unset Cache-control

share|improve this answer

answered Sep 8 '14 at 20:18

Shane Madden♦Shane Madden

105k9148225

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for the thoughts Shane. I considered that and tried it, but it didn't work. I found the answer to the problem though (and realize I failed to include some auxiliary information about my set up). Going to answer it now
  
  – onassar
  Sep 8 '14 at 20:29
  

  
  
  
  

add a comment | 

0

I'm guessing you've run into a bug because you have two different capitalizations of Cache-Control:

Cache-Control: max-age=259200, no-cache="set-cookie"
Cache-control: no-cache="set-cookie"

HTTP headers are case-insensitive, but you've probably run into an oddball edge case where Apache stops looking when it finds a match to what you're trying to remove - so the first one, Cache-Control, gets removed, while Cache-Control doesn't.

Either find where in your config or code the Cache-control header is being set and have it fully capitalize to the normal Cache-Control (then a Header unset Cache-Control should nuke both values), or make Apache search for the matching case-insensitive name twice, which should hopefully work:

Header unset Cache-Control
Header unset Cache-control

share|improve this answer

answered Sep 8 '14 at 20:18

Shane Madden♦Shane Madden

105k9148225

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for the thoughts Shane. I considered that and tried it, but it didn't work. I found the answer to the problem though (and realize I failed to include some auxiliary information about my set up). Going to answer it now
  
  – onassar
  Sep 8 '14 at 20:29
  

  
  
  
  

add a comment | 

I'm guessing you've run into a bug because you have two different capitalizations of Cache-Control:

Cache-Control: max-age=259200, no-cache="set-cookie"
Cache-control: no-cache="set-cookie"

HTTP headers are case-insensitive, but you've probably run into an oddball edge case where Apache stops looking when it finds a match to what you're trying to remove - so the first one, Cache-Control, gets removed, while Cache-Control doesn't.

Either find where in your config or code the Cache-control header is being set and have it fully capitalize to the normal Cache-Control (then a Header unset Cache-Control should nuke both values), or make Apache search for the matching case-insensitive name twice, which should hopefully work:

Header unset Cache-Control
Header unset Cache-control

share|improve this answer

answered Sep 8 '14 at 20:18

Shane Madden♦Shane Madden

105k9148225

Cache-Control: max-age=259200, no-cache="set-cookie"
Cache-control: no-cache="set-cookie"

Header unset Cache-Control
Header unset Cache-control

share|improve this answer

answered Sep 8 '14 at 20:18

Shane Madden♦Shane Madden

105k9148225

answered Sep 8 '14 at 20:18

Shane Madden♦Shane Madden

105k9148225

answered Sep 8 '14 at 20:18

Shane Madden♦Shane Madden

105k9148225

0

I failed to mention that my server(s) are behind a load balancer on AWS

AWS ELB (what they call their load balancers) have a setting call stickiness

When you turn it on, they set a cookie to make sure visitors consistently get sent to the same server

This has the added side effect of adding the following header after your server fulfills the request:

Cache-control: no-cache="set-cookie"

I needed to turn off stickiness to prevent this header from being set

In retrospect, I should've outlined my setup more to help debug this

Thanks for your help Shane

share|improve this answer

answered Sep 8 '14 at 20:35

onassaronassar

1538

add a comment | 

0

I failed to mention that my server(s) are behind a load balancer on AWS

AWS ELB (what they call their load balancers) have a setting call stickiness

When you turn it on, they set a cookie to make sure visitors consistently get sent to the same server

This has the added side effect of adding the following header after your server fulfills the request:

Cache-control: no-cache="set-cookie"

I needed to turn off stickiness to prevent this header from being set

In retrospect, I should've outlined my setup more to help debug this

Thanks for your help Shane

share|improve this answer

answered Sep 8 '14 at 20:35

onassaronassar

1538

add a comment | 

I failed to mention that my server(s) are behind a load balancer on AWS

AWS ELB (what they call their load balancers) have a setting call stickiness

When you turn it on, they set a cookie to make sure visitors consistently get sent to the same server

This has the added side effect of adding the following header after your server fulfills the request:

Cache-control: no-cache="set-cookie"

I needed to turn off stickiness to prevent this header from being set

In retrospect, I should've outlined my setup more to help debug this

Thanks for your help Shane

share|improve this answer

answered Sep 8 '14 at 20:35

onassaronassar

1538

share|improve this answer

answered Sep 8 '14 at 20:35

onassaronassar

1538

answered Sep 8 '14 at 20:35

onassaronassar

1538

answered Sep 8 '14 at 20:35

onassaronassar

1538