Zuul Filters

Overview

• Filter Types
• How to Define a Filter

---

Filter Types

• Pre filter
  • Invocation: Invoked before routing the request to the target service.
  • Uses:
    • Request authentication.
    • Request authorization.
    • Make sure all the requests are in the consistent format.
    • Log debug info.
• Post filter
  • Invocation: Invoked after the target service has been triggered and a response is being sent back to the client.
  • Uses:
    • Make sure all the response are in the consistent format.
    • Log debug info.
    • Collect statistics and metrics.
    • Stream the response from the target service to the client.
• Route filter
  • Invocation: Invoked when the request is routing to the target service.
  • Uses:
    • Define a custom routing logic.
    • A/B test.
• Error filter
  • Invocation: Invoke when an error occurs during the execution of other filters.