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Adobe Employee
AnikaAgAdobe Employee
Adobe Employee
September 8, 2022
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Cache POST call in dispatcher/fastly in AEM cloud

  • September 8, 2022
  • 2 replies
  • 1240 views

Can anyone guide, how to cache POST call in dispatcher in AEM cloud?

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Best answer by joerghoh

There are 3 rules which are backed into the dispatcher regarding caching:

  1. Only the response of GET requests are cached.
  2. The requested file must have an extension
  3. The statuscode of the request must be 200.

And then there are other options you can configure, for example regarding paths, extensions etc.

 

Also the HTTP RFCs mention that only GET should be cached, because POST requests are designed to change status, and therefor caching their result and returning them on a different POST request will return inconsistent data.

 

If course you can build your own code into AEM to cache POST requests (or part of it), but by default neither AEM nor the Dispatcher support that. And in case of AEM as a Cloud Service also the CDN does not support it.

2 replies

arunpatidar
Community Advisor
arunpatidarCommunity Advisor
Community Advisor
September 8, 2022

Dispatcher does not cache post request.

Please check https://experienceleague.adobe.com/docs/experience-cloud-kcs/kbarticles/KA-17497.html?lang=en 

Arun Patidar
    A
    Adobe Employee
    AnikaAgAdobe EmployeeAuthor
    Adobe Employee
    September 8, 2022

    Thanks @arunpatidar . Is there an alternative way so that POST response can be cached?

     

    Thanks

    Anika

      arunpatidar
      Community Advisor
      arunpatidarCommunity Advisor
      Community Advisor
      September 8, 2022

      Hi,

      You can cached directly in AEM at /var location and provided directly or use in memory caching.

      https://adobe-consulting-services.github.io/acs-aem-commons/features/http-cache/index.html 

      Arun Patidar
        joerghoh
        Adobe Employee
        joerghohAdobe EmployeeAccepted solution
        Adobe Employee
        September 9, 2022

        There are 3 rules which are backed into the dispatcher regarding caching:

        1. Only the response of GET requests are cached.
        2. The requested file must have an extension
        3. The statuscode of the request must be 200.

        And then there are other options you can configure, for example regarding paths, extensions etc.

         

        Also the HTTP RFCs mention that only GET should be cached, because POST requests are designed to change status, and therefor caching their result and returning them on a different POST request will return inconsistent data.

         

        If course you can build your own code into AEM to cache POST requests (or part of it), but by default neither AEM nor the Dispatcher support that. And in case of AEM as a Cloud Service also the CDN does not support it.

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