Traefik ContentType Documentation

The contentType middleware sets the Content-Type header value to the media type detected from the response content, when it is not set by the backend.

!!! info

The `contentType` middleware only applies when Traefik detects the MIME type. If any middleware (such as Headers or Compress) sets the `contentType` header at any point in the chain, the `contentType` middleware has no effect.

Configuration Examples

# Enable auto-detection
http:
  middlewares:
    autodetect:
      contentType: {}

# Enable auto-detection
[http.middlewares]
  [http.middlewares.autodetect.contentType]

# Enable auto-detection
labels:
  - "traefik.http.middlewares.autodetect.contenttype=true"

// Enable auto-detection
{
  // ...
  "Tags": [
    "traefik.http.middlewares.autodetect.contenttype=true"
  ]
}

# Enable auto-detection
apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
  name: autodetect
spec:
  contentType: {}