Azure APIM Gateway is trimming the trailing slash in the api url - azure-api-management

Question

I have a requirement to add trailing slash to the APIs hosted in APIM. However, APIM gateway seems to be removing the trailing slash when forward the call to backend service.
Example 1:
APIM Gateway URL: https://api.domain.com/getdata/
Backend service URL: https://mybackendservice.domain.com/getdata
Example 2:
APIM Gateway URL: https://api.domain.com/getdata/?q=1&r=2
Backend service URL: https://mybackendservice.domain.com/getdata?q=1&r=2
Can someone please suggest any URL rewrite policies we can add to retain the trailing slash, so that the backend service urls would be:
https://mybackendservice.domain.com/getdata/
https://mybackendservice.domain.com/getdata/?q=1&r=2

Answer 1

Thank you Vitaliy Kurokhtin ,Posting your suggestion as an answer to help other community members.
"Let's say you have APIM service with hostname my-service.azure-api.net. An API in APIM service with URL suffix my-api, and a backend URI of https://my-backend.com. And an operation in this API with URI template of my/uri/template.
So for an incoming call to
https://my-service.azure-api.net/my-api/my/uri/template
without any additional configuration APIM service will make a call to
https://my-backend.com/my/uri/template
Because by default APIM service replaces in source URI scheme+hostname+api suffix with backend URI defined for an API in question.
In most simple case when your API has only one operation you could set API suffix to api/v1/storenumber/ordernumber and operation template to /. That would result in public facing URI of https://api.example.com/api/v1/storenumber/ordernumber
and backend URI for this operation of
https://back-end.service.com/
Of course this is approach is harder to use when you have multiple operations in API. In that case you'll need to use policies: Rewrite URL |MS DOC . For that you can set your API suffix and operation URI template to anything, but add this policy into operation's inbound section:
<rewrite-uri template="/" />
what rewrite-uri policy does is overrides operation URI template for backend request"
Reference:
Azure APIM "rewrite-uri" policy - How to remove the URL suffix?