What is most efficient way to setup http profile with ram cache

Hi,

 

Thanks for the reply. I used the standard template as you suggested and then did the irule below which will cache disable anything other than the files I listed.

 

I am going to see if it works and enabled the logging. Any good tips on testing or gather stats? Thanks again

 

when HTTP_REQUEST {

 

switch -glob [ string tolower [HTTP::uri]] {

 

"text/*javascript" -

 

"Scripts/*.js" -

 

"text/*.css" -

 

"image/*.swf" -

 

"image/*.gif" -

 

"image/*.png" -

 

"image/*.jpg" -

 

"image/*.jpeg"

 

{ CACHE::enable

 

log local0. "Caching [HTTP::uri]" }

 

else { CACHE::disable

 

log local0. "Non Caching [HTTP::uri]" }

 

}

 

}

- extra switch pattern with no body

 

 

Does anyone know what this log message means?

- extra switch pattern with no body

 

 

Does anyone know what this log message means?

It could be caused by the "else" case. I think you want to use "default" there.

extra switch pattern with no body while executing "switch -glob?

 

Peter,

 

 

- Switch does not support an else statement.

 

-The S in "Scripts/*.js" should be s or it will never match.

 

- logging all traffic generates quite a lot of data - added debug flag. Set to 1 for testing, 0 for production.

 

 

The code should look like....

 

 

when HTTP_REQUEST { 
  set debug 0
  switch -glob [string tolower [HTTP::uri]] { 
    "text/*javascript" - 
    "scripts/*.js" - 
    "text/*.css" - 
    "image/*.swf" - 
    "image/*.gif" - 
    "image/*.png" - 
    "image/*.jpg" - 
    "image/*.jpeg" { 
      CACHE::enable 
      if {$debug} { log local0. "Caching [HTTP::uri]" }
    } 
    default { 
      CACHE::disable
      if {$debug} { log local0. "Non Caching [HTTP::uri]" }
    }
  }
}

 

 

Jarvil

Tip - When pasting iRules put inside "code" blocks then submit, edit, submit to get the code looking like above.

 

 

Thanks for adding the info.

 

I really appreciate it.

 

I'm going to test it out this morning and then read up on how to gather some stats because I think that'll be the next thing they want to see.

Hi All,

 

 

I have tried to test this irule but nothing of the items that are listed seem to be getting caches as shown below at

 

the ltm log

 

I do have an http profile setup for ram cache turned on.

 

 

ltm log:

 

"Non Caching /app_themes/default/images/icon.check.png"

 

 

Based on my irule, shouldn't the *.png be cached?

 

 

Below is the script and I suppose I am off somewhat. All I am trying to do is setup a simple RAM cache, add this irule in to see if it's working and then turn off debug. The customers will probably want to see some stats but first I need to ensure it works.

 

Any one know why?

 

 

when HTTP_REQUEST {

 

set debug 1

 

switch -glob [string tolower [HTTP::uri]] {

 

"text/*javascript" -

 

"scripts/*.js" -

 

"text/*.css" -

 

"image/*.swf" -

 

"image/*.gif" -

 

"image/*.png" -

 

"image/*.jpg" -

 

"image/*.jpeg" {

 

CACHE::enable

 

if {$debug} { log local0. "Caching [HTTP::uri]" }

 

}

 

default {

 

CACHE::disable

 

if {$debug} { log local0. "Non Caching [HTTP::uri]" }

 

{

 

HTTP::header replace "Cache-Control" "private, max-age=86400" }

 

}

 

}

 

}

 

when CACHE_REQUEST { log local0. "[CACHE::hits] cache hits for document at [HTTP::uri]" }

Are you trying to do this check based on the request URI? I see HTTP::uri in your switch, but some of the values in the switch cases don't look like valid URI patterns.

First, HTTP::uri always starts with a "/". Secondly, you have other folders in your example path (/app_themes/default/images/icon.check.png) before the "image" folder in your switch case. So I think you need to change some of them as follows...

 
when HTTP_REQUEST { 
  set debug 1
  switch -glob [string tolower [HTTP::uri]] { 
  "text/*javascript" -     this looks like a content type.  Do you really have a URI pattern in the site that looks like this?
    "*/scripts/*.js" -     needs to have a leading wildcard
    "text/*.css" -         is this a content type, too?  Or should it have a leading wildcard?
    "*/images/*.swf" -     needs to have a leading wildcard -- and the "s" in "images"
    "*/images/*.gif" - 
    "*/images/*.png" - 
    "*/images/*.jpg" - 
    "*/images/*.jpeg" 
    ...

Thanks for taking the time to repond. I understand it much better now and will adjust it accordingly and let the group know the out come.