traefik/docs/content/middlewares/compress.md

Compress

Compressing the Response before Sending it to the Client {: .subtitle }

The Compress middleware enables the gzip compression.

Configuration Examples

# Enable gzip compression
labels:
  - "traefik.http.middlewares.test-compress.compress=true"

# Enable gzip compression
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: test-compress
spec:
  compress: {}

# Enable gzip compression
- "traefik.http.middlewares.test-compress.compress=true"

"labels": {
  "traefik.http.middlewares.test-compress.compress": "true"
}

# Enable gzip compression
labels:
  - "traefik.http.middlewares.test-compress.compress=true"

# Enable gzip compression
[http.middlewares]
  [http.middlewares.test-compress.compress]

# Enable gzip compression
http:
  middlewares:
    test-compress:
      compress: {}

!!! info

Responses are compressed when:

* The response body is larger than `1400` bytes.
* The `Accept-Encoding` request header contains `gzip`.
* The response is not already compressed, i.e. the `Content-Encoding` response header is not already set.

If Content-Type header is not defined, or empty, the compress middleware will automatically [detect](https://mimesniff.spec.whatwg.org/) a content type. 
It will also set accordingly the `Content-Type` header with the detected MIME type.

Configuration Options

excludedContentTypes

excludedContentTypes specifies a list of content types to compare the Content-Type header of the incoming requests to before compressing.

The requests with content types defined in excludedContentTypes are not compressed.

Content types are compared in a case-insensitive, whitespace-ignored manner.

labels:
  - "traefik.http.middlewares.test-compress.compress.excludedcontenttypes=text/event-stream"

apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: test-compress
spec:
  compress:
    excludedContentTypes:
      - text/event-stream

- "traefik.http.middlewares.test-compress.compress.excludedcontenttypes=text/event-stream"

"labels": {
  "traefik.http.middlewares.test-compress.compress.excludedcontenttypes": "text/event-stream"
}

labels:
  - "traefik.http.middlewares.test-compress.compress.excludedcontenttypes=text/event-stream"

[http.middlewares]
  [http.middlewares.test-compress.compress]
    excludedContentTypes = ["text/event-stream"]

http:
  middlewares:
    test-compress:
      compress:
        excludedContentTypes:
          - text/event-stream