X-Dispatcher-Info header not returning | Community
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zoom_chris
June 19, 2017
Solved

X-Dispatcher-Info header not returning

  • June 19, 2017
  • 4 replies
  • 2608 views

Greetings AEM humans,

I am trying to test caching on Dispatcher 4.2.2 using the Apache Dispatcher module 2.2.

This guide:

Configuring Dispatcher - docs.adobe.com

Recommends sending the header "X-Dispatcher-Info" to the dispatcher, so that it will return the response header "X-Cache-Info" with the cache info about the page from dispatcher, but we can't get that to work!

Does anyone have any idea how we can get the dispatcher to return the cache info using this header? Here is a sample CURL request, we used TRUE as the docs didn't mention what payload this should be. If we don't send a value it drops the header...

$ curl -v -I --header "X-Dispatcher-Info: TRUE" http://WEBSITEURL/

*   Trying 192.168.X.X..

* TCP_NODELAY set

* Connected to WEBSITEURL (192.168.X.X) port 80 (#0)

> HEAD / HTTP/1.1

> Host: WEBSITEURL

> User-Agent: curl/7.51.0

> Accept: */*

> X-Dispatcher-Info: TRUE

>

< HTTP/1.1 200 OK

HTTP/1.1 200 OK

< Date: Mon, 19 Jun 2017 03:42:01 GMT

Date: Mon, 19 Jun 2017 03:42:01 GMT

< X-Content-Type-Options: nosniff

X-Content-Type-Options: nosniff

< X-Frame-Options: SAMEORIGIN

X-Frame-Options: SAMEORIGIN

< Content-Type: text/html; charset=UTF-8

Content-Type: text/html; charset=UTF-8

< Expires: Thu, 01 Jan 1970 00:00:00 GMT

Expires: Thu, 01 Jan 1970 00:00:00 GMT

< Transfer-Encoding: chunked

Transfer-Encoding: chunked

< Set-Cookie: JSESSIONID=FOO;Path=/;HttpOnly

Set-Cookie: JSESSIONID=FOO;Path=/;HttpOnly

< Content-Language: en

Content-Language: en

<

* Curl_http_done: called premature == 0

* Connection #0 to host WEBSITEURL left intact

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Best answer by joerghoh

Hi,

the value of this header doesn't care, the dispatcher just checks for its existence.

Jörg

4 replies

kautuk_sahni
Community Manager
Community Manager
June 20, 2017

Jörg Hoh​ Any help here?

~kautuk

Kautuk Sahni
joerghoh
Adobe Employee
Adobe Employee
June 20, 2017

You have to enable this functionality first; add a statement '/info "1"' to your farm.

/farms

  /myfarm

  /info "1"

zoom_chris
June 20, 2017

Hi Jörg,

Thank you for the reply.

We enabled this in our farm, but the X-Dispatcher-Info header is dropped if it doesn't have a value. There is no value documented in the docs.

What value do we need to send through? Like:

X-Dispatcher-Info: true

X-Dispatcher-Info: 1

X-Dispatcher-Info: value

Thanks in advance!

joerghoh
Adobe Employee
joerghohAdobe EmployeeAccepted solution
Adobe Employee
June 21, 2017

Hi,

the value of this header doesn't care, the dispatcher just checks for its existence.

Jörg