StripPrefixRegex

    Remove the matching prefixes from the URL path.

    Docker

    Kubernetes

    1. apiVersion: traefik.containo.us/v1alpha1
    2. kind: Middleware
    3.   name: test-stripprefixregex
    4. spec:
    5.   stripPrefixRegex:
    6.     regex:
    7.       - "/foo/[a-z0-9]+/[0-9]+/"

    Consul Catalog

    Marathon

    1. "labels": {
    2. }

    File (YAML)

    1. http:
    2.   middlewares:
    3.     test-stripprefixregex:
    4.       stripPrefixRegex:
    5.         regex:

    File (TOML)

    Configuration Options

    The StripPrefixRegex middleware strips the matching path prefix and stores it in a X-Forwarded-Prefix header.

    Tip

    Use a stripPrefixRegex middleware if your backend listens on the root path () but should be exposed on a specific prefix.

    regex

    For instance, /products also matches /products/shoes and /products/shirts.

    If your backend is serving assets (e.g., images or JavaScript files), it can use the X-Forwarded-Prefix header to properly construct relative URLs. Using the previous example, the backend should return /products/shoes/image.png (and not /images.png, which Traefik would likely not be able to associate with the same backend).

    Tip

    Regular expressions and replacements can be tested using online tools such as Go Playground or the .

    When defining a regular expression within YAML, any escaped character needs to be escaped twice: example\.com needs to be written as .