Support of the Route Constraints in the proxy template route
It would be useful to support route constrains in the proxy template route in order to allow filtering routes by using regex.
This functionality is supported in Azure APIM, and we would suggest using that offering if you need full regex matching in routes. https://docs.microsoft.com/en-us/azure/api-management/api-management-policy-expressions
In Proxies we support route variables, which will perform wildcard matching around your variable rules. You can then run a regex match on the resultant data inside of a Function. https://docs.microsoft.com/en-us/azure/azure-functions/functions-proxies#modify-requests-responses
Thanks for the feedback!
Azure Functions Team