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  1. Struts 2
  2. WW-4323

Ability to accept params purely by implementing ParamNameAware is broken

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 2.3.16.1
    • Fix Version/s: 2.5.x
    • Component/s: None
    • Labels:
      None
    • Environment:

      struts2 version 2.3.16.1

      Description

      The ability to accept params purely by implementing ParamNameAware is broken.

      Relates to https://issues.apache.org/jira/browse/WW-3866 which is when this feature was added for version 2.3.5

      The commit that breaks this feature is: https://github.com/apache/struts/commit/4e98aaaa1b08cc37374d06e77cf78000d98c5ff0

      Description:

      Prior to this change/2.3.16.1 it was quite convenient to define what parameters my action should accept, by implementing ParameterNameAware#acceptableParameterName. With this change, there is the additional requirement that the parameter names must also satisfy acceptableName(name).

      In the ParametersInterceptor javadoc, it says: "if you wish to apply a global rule that isn't implemented in your action, then you could extend this interceptor and override the

      {@link #acceptableName(String)}

      method." So this isn't suitable for customizing a single action.

      Looking more carefully at the code, another alternative to defining what parameters my action can accept, looks to be via populating the ParametersInterceptor's field acceptParams. Apparently this could be done in the interceptor stack from what I have read here: http://struts.apache.org/release/2.3.x/docs/parameters-interceptor.html

      By forcing one to populate acceptParams, and also implement ParameterNameAware#acceptableParameterName it becomes quite difficult to add custom behavior. I understand people should fully understand what they are doing due to the security risks involved, but it is probably safer to define the behavior in a single place.

      I'd greatly appreciate your help understanding how to adapt to this change. In the meantime, I'll have to continue using 2.3.15.3

      Thanks

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            • Assignee:
              Unassigned
              Reporter:
              kbraak Kyle Braak
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              Dates

              • Created:
                Updated: