84 lines
2.2 KiB
Markdown
84 lines
2.2 KiB
Markdown
|
|
||
|
|
# ContentType
|
||
|
|
|
||
|
|
Handling ContentType auto-detection
|
||
|
|
{: .subtitle }
|
||
|
|
|
||
|
|
The Content-Type middleware - or rather its unique `autoDetect` option -
|
||
|
|
specifies whether to let the `Content-Type` header,
|
||
|
|
if it has not been set by the backend,
|
||
|
|
be automatically set to a value derived from the contents of the response.
|
||
|
|
|
||
|
|
As a proxy, the default behavior should be to leave the header alone,
|
||
|
|
regardless of what the backend did with it.
|
||
|
|
However, the historic default was to always auto-detect and set the header if it was nil,
|
||
|
|
and it is going to be kept that way in order to support users currently relying on it.
|
||
|
|
This middleware exists to enable the correct behavior until at least the default one can be changed in a future version.
|
||
|
|
|
||
|
|
!!! info
|
||
|
|
|
||
|
|
As explained above, for compatibility reasons the default behavior on a router (without this middleware),
|
||
|
|
is still to automatically set the `Content-Type` header.
|
||
|
|
Therefore, given the default value of the `autoDetect` option (false),
|
||
|
|
simply enabling this middleware for a router switches the router's behavior.
|
||
|
|
|
||
|
|
## Configuration Examples
|
||
|
|
|
||
|
|
```yaml tab="Docker"
|
||
|
|
# Disable auto-detection
|
||
|
|
labels:
|
||
|
|
- "traefik.http.middlewares.autodetect.contenttype.autodetect=false"
|
||
|
|
```
|
||
|
|
|
||
|
|
```yaml tab="Kubernetes"
|
||
|
|
# Disable auto-detection
|
||
|
|
apiVersion: traefik.containo.us/v1alpha1
|
||
|
|
kind: Middleware
|
||
|
|
metadata:
|
||
|
|
name: autodetect
|
||
|
|
spec:
|
||
|
|
contentType:
|
||
|
|
autoDetect: false
|
||
|
|
```
|
||
|
|
|
||
|
|
```yaml tab="Consul Catalog"
|
||
|
|
# Disable auto-detection
|
||
|
|
- "traefik.http.middlewares.autodetect.contenttype.autodetect=false"
|
||
|
|
```
|
||
|
|
|
||
|
|
```json tab="Marathon"
|
||
|
|
"labels": {
|
||
|
|
"traefik.http.middlewares.autodetect.contenttype.autodetect": "false"
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
```yaml tab="Rancher"
|
||
|
|
# Disable auto-detection
|
||
|
|
labels:
|
||
|
|
- "traefik.http.middlewares.autodetect.contenttype.autodetect=false"
|
||
|
|
```
|
||
|
|
|
||
|
|
```toml tab="File (TOML)"
|
||
|
|
# Disable auto-detection
|
||
|
|
[http.middlewares]
|
||
|
|
[http.middlewares.autodetect.contentType]
|
||
|
|
autoDetect=false
|
||
|
|
```
|
||
|
|
|
||
|
|
```yaml tab="File (YAML)"
|
||
|
|
# Disable auto-detection
|
||
|
|
http:
|
||
|
|
middlewares:
|
||
|
|
autodetect:
|
||
|
|
contentType:
|
||
|
|
autoDetect: false
|
||
|
|
```
|
||
|
|
|
||
|
|
## Configuration Options
|
||
|
|
|
||
|
|
### `autoDetect`
|
||
|
|
|
||
|
|
`autoDetect` specifies whether to let the `Content-Type` header,
|
||
|
|
if it has not been set by the backend,
|
||
|
|
be automatically set to a value derived from the contents of the response.
|