Custom Policies API Manager - wso2

Question

I tried to create a custom policy, with a purpose a mask of service:
Original Services in API:
http://API/v1/profile
http://API/v1/account
With mask:
http://API/v1/user-profile
http://API/v1/user-account
And combination the answer of User Bee this a solution for this problem:
<switch source="get-property('axis2', 'REST_URL_POSTFIX')">
<case regex="/v1/kyc-profile">
<property name="REST_URL_POSTFIX" value="/v1/profile" scope="axis2"/>
</case>
<case regex="/v1/kyc-account">
<property name="REST_URL_POSTFIX" value="/v1/account" scope="axis2"/>
</case>
</switch>
But this solution only works where the services is static, but I have others services, similar to:
http://API/v1/user-profile/{id-user}/details
http://API/v1/user-profile/{id-user}?expand=some_information
For the last service I have this:
<switch source="get-property('axis2', 'REST_URL_POSTFIX')">
<case regex="v1/user-profile/[\/\w\W]*">
<property name="REST_URL_POSTFIX" value="/v2/cliente/{id-user}?expand=some_information" scope="axis2"/>
</case>
</switch>
[/\w\W]* This part is regular expression for {id-user}?expand=some_information and similar.
The problem is: I need put dynamic value because the property value (<property name="REST_URL_POSTFIX" value="THIS" scope="axis2"/>) takes this text, example:
Service before to policie
http://API/v1/user-profile/1?expand=some_information
Service after to policie
http://API/v1/user-profile/{id-user}?expand=some_information
My questions are:
How to put a dynamic value for the services similar to: http://API/v1/user-profile/{id-user}?expand=some_information?
For the other service, http://API/v1/user-profile/{id-user}/details I have the similar situacion, How a resolve?

Answer 1

In your mediation sequence, try changing the backend URL as follows.
http://API/v1/user-profile/{uri.var.id-user}?expand=some_information
Example:
<switch source="get-property('axis2', 'REST_URL_POSTFIX')">
<case regex="v1/user-profile/[\/\w\W]*">
<property name="REST_URL_POSTFIX" value="/v2/cliente/{uri.var.id-user}?expand=some_information" scope="axis2"/>
</case>
</switch>