traefik/docs/content/middlewares/http/stripprefix.md
Romain 40de310927
Reintroduce dropped v2 dynamic config
Co-authored-by: Baptiste Mayelle <baptiste.mayelle@traefik.io>
2024-01-29 17:32:05 +01:00

147 lines
3.7 KiB
Markdown

---
title: "Traefik StripPrefix Documentation"
description: "In Traefik Proxy's HTTP middleware, StripPrefix removes prefixes from paths before forwarding requests. Read the technical documentation."
---
# StripPrefix
Removing Prefixes From the Path Before Forwarding the Request
{: .subtitle }
<!--
TODO: add schema
-->
Remove the specified prefixes from the URL path.
## Configuration Examples
```yaml tab="Docker & Swarm"
# Strip prefix /foobar and /fiibar
labels:
- "traefik.http.middlewares.test-stripprefix.stripprefix.prefixes=/foobar,/fiibar"
```
```yaml tab="Kubernetes"
# Strip prefix /foobar and /fiibar
apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
name: test-stripprefix
spec:
stripPrefix:
prefixes:
- /foobar
- /fiibar
```
```yaml tab="Consul Catalog"
# Strip prefix /foobar and /fiibar
- "traefik.http.middlewares.test-stripprefix.stripprefix.prefixes=/foobar,/fiibar"
```
```yaml tab="File (YAML)"
# Strip prefix /foobar and /fiibar
http:
middlewares:
test-stripprefix:
stripPrefix:
prefixes:
- "/foobar"
- "/fiibar"
```
```toml tab="File (TOML)"
# Strip prefix /foobar and /fiibar
[http.middlewares]
[http.middlewares.test-stripprefix.stripPrefix]
prefixes = ["/foobar", "/fiibar"]
```
## Configuration Options
### General
The StripPrefix middleware strips the matching path prefix and stores it in a `X-Forwarded-Prefix` header.
!!! tip
Use a `StripPrefix` middleware if your backend listens on the root path (`/`) but should be exposed on a specific prefix.
### `prefixes`
The `prefixes` option defines the prefixes to strip from the request URL.
For instance, `/products` also matches `/products/shoes` and `/products/shirts`.
If your backend is serving assets (e.g., images or JavaScript files), it can use the `X-Forwarded-Prefix` header to properly construct relative URLs.
Using the previous example, the backend should return `/products/shoes/image.png` (and not `/image.png`, which Traefik would likely not be able to associate with the same backend).
### `forceSlash`
_Optional, Default=true_
!!! warning
`forceSlash` option is deprecated and should not be used.
The `forceSlash` option ensures the resulting stripped path is not the empty string, by replacing it with `/` when necessary.
??? info "Behavior examples"
- `forceSlash=true`
| Path | Prefix to strip | Result |
|------------|-----------------|--------|
| `/` | `/` | `/` |
| `/foo` | `/foo` | `/` |
| `/foo/` | `/foo` | `/` |
| `/foo/` | `/foo/` | `/` |
| `/bar` | `/foo` | `/bar` |
| `/foo/bar` | `/foo` | `/bar` |
- `forceSlash=false`
| Path | Prefix to strip | Result |
|------------|-----------------|--------|
| `/` | `/` | empty |
| `/foo` | `/foo` | empty |
| `/foo/` | `/foo` | `/` |
| `/foo/` | `/foo/` | empty |
| `/bar` | `/foo` | `/bar` |
| `/foo/bar` | `/foo` | `/bar` |
```yaml tab="Docker"
labels:
- "traefik.http.middlewares.example.stripprefix.prefixes=/foobar"
- "traefik.http.middlewares.example.stripprefix.forceSlash=false"
```
```yaml tab="Kubernetes"
apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
name: example
spec:
stripPrefix:
prefixes:
- "/foobar"
forceSlash: false
```
```yaml tab="File (YAML)"
http:
middlewares:
example:
stripPrefix:
prefixes:
- "/foobar"
forceSlash: false
```
```toml tab="File (TOML)"
[http.middlewares]
[http.middlewares.example.stripPrefix]
prefixes = ["/foobar"]
forceSlash = false
```