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2.2.33.56.5. Configuring for case normalization

2.2.33.56.5. Configuring for case normalization

In some environments, it may be useful to have paths in authorization policies compared in a case insensitive manner. For example, treating https://myurl/get and https://myurl/GeT as equivalent. In those cases, you can use the EnvoyFilter shown below. This filter will change both the path used for comparison and the path presented to the application. In this example, istio-system is the name of the Service Mesh control plane project.

Save the EnvoyFilter to a file and run the following command:

$ oc create -f <myEnvoyFilterFile>

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: ingress-case-insensitive
  namespace: istio-system
spec:
  configPatches:
  - applyTo: HTTP_FILTER
    match:
      context: GATEWAY
      listener:
        filterChain:
          filter:
            name: "envoy.filters.network.http_connection_manager"
            subFilter:
              name: "envoy.filters.http.router"
    patch:
      operation: INSERT_BEFORE
      value:
        name: envoy.lua
        typed_config:
            "@type": "type.googleapis.com/envoy.extensions.filters.http.lua.v3.Lua"
            inlineCode: |
              function envoy_on_request(request_handle)
                local path = request_handle:headers():get(":path")
                request_handle:headers():replace(":path", string.lower(path))
              end

2.2.33.56.5. Configuring for case normalization

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