RouterChecker http request routing
Use routerchecker middleware to block invalid http request routing
The RouterChecker HTTP middleware component leverages regexp to check the validity of HTTP request routing to prevent invalid routers from entering the Dapr cluster. In turn, the RouterChecker component filters out bad requests and reduces noise in the telemetry and log data.
Component format
The RouterChecker applies a set of rules to the incoming HTTP request. You define these rules in the component metadata using regular expressions. In the following example, the HTTP request RouterChecker is set to validate all requests message against the ^[A-Za-z0-9/._-]+$: regex.
apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
name: routerchecker
spec:
type: middleware.http.routerchecker
version: v1
metadata:
- name: rule
value: "^[A-Za-z0-9/._-]+$"
In this example, the above definition would result in the following PASS/FAIL cases:
PASS /v1.0/invoke/demo/method/method
PASS /v1.0/invoke/demo.default/method/method
PASS /v1.0/invoke/demo.default/method/01
PASS /v1.0/invoke/demo.default/method/METHOD
PASS /v1.0/invoke/demo.default/method/user/info
PASS /v1.0/invoke/demo.default/method/user_info
PASS /v1.0/invoke/demo.default/method/user-info
FAIL /v1.0/invoke/demo.default/method/cat password
FAIL /v1.0/invoke/demo.default/method/" AND 4210=4210 limit 1
FAIL /v1.0/invoke/demo.default/method/"$(curl
Spec metadata fields
| Field | Details | Example |
|---|---|---|
| rule | the regexp expression to be used by the HTTP request RouterChecker | ^[A-Za-z0-9/._-]+$ |
Dapr configuration
To be applied, the middleware must be referenced in configuration. See middleware pipelines.
apiVersion: dapr.io/v1alpha1
kind: Configuration
metadata:
name: appconfig
spec:
httpPipeline:
handlers:
- name: routerchecker
type: middleware.http.routerchecker