[FIXED] Applying regex in Spring Cloud Gateway Path predicate

Issue

I'm using 3.1.0 version for Spring Cloud Gateway and I need help in checking and fixing the Path predicate filter for my route configuration.

I'm trying to use regex in between a path, the route looks something like this in my config:

        - id: Route1
          uri: https://example.com
          predicates:
            - Path=/random/path/\d+/update
            - Method=POST

Though this is a valid regex, I'm getting 404 error code for requests for path :

/random/path/12/update

Hence I need help to figure out the correct configs for this usecase

Solution

It requires a named path segment. See the syntax here. You can then use {mynum} in filters like SetPath

    - id: Route1
      uri: https://example.com
      predicates:
        - Path=/random/path/{mynum:\d+}/update
        - Method=POST

Answered By - spencergibb
Answer Checked By - David Goodson (JavaFixing Volunteer)