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77 lines
3.0 KiB
Markdown
77 lines
3.0 KiB
Markdown
---
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title: "Traefik Buffering Documentation"
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description: "The HTTP buffering middleware in Traefik Proxy limits the size of requests that can be forwarded to Services. Read the technical documentation."
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---
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The `buffering` middleware limits the size of requests that can be forwarded to services.
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With buffering, Traefik reads the entire request into memory (possibly buffering large requests into disk), and rejects requests that are over a specified size limit.
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This can help services avoid large amounts of data (`multipart/form-data` for example), and can minimize the time spent sending data to a Service
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## Configuration Examples
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```yaml tab="Structured (YAML)"
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# Sets the maximum request body to 2MB
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http:
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middlewares:
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limit:
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buffering:
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maxRequestBodyBytes: 2000000
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```
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```toml tab="Structured (TOML)"
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# Sets the maximum request body to 2MB
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[http.middlewares]
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[http.middlewares.limit.buffering]
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maxRequestBodyBytes = 2000000
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```
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```yaml tab="Labels"
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# Sets the maximum request body to 2MB
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labels:
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- "traefik.http.middlewares.limit.buffering.maxRequestBodyBytes=2000000"
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```
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```json tab="Tags"
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// Sets the maximum request body to 2MB
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{
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// ...
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"Tags": [
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"traefik.http.middlewares.test-auth.basicauth.users=test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/,test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0"
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]
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}
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```
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```yaml tab="Kubernetes"
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# Sets the maximum request body to 2MB
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apiVersion: traefik.io/v1alpha1
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kind: Middleware
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metadata:
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name: limit
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spec:
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buffering:
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maxRequestBodyBytes: 2000000
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```
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## Configuration Options
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| Field | Description | Default | Required |
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|:------|:------------|:--------|:---------|
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| `maxRequestBodyBytes` | Maximum allowed body size for the request (in bytes). <br /> If the request exceeds the allowed size, it is not forwarded to the Service, and the client gets a `413` (Request Entity Too Large) response. | 0 | No |
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| `memRequestBodyBytes` | Threshold (in bytes) from which the request will be buffered on disk instead of in memory with the `memRequestBodyBytes` option.| 1048576 | No |
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| `maxResponseBodyBytes` | Maximum allowed response size from the Service (in bytes). <br /> If the response exceeds the allowed size, it is not forwarded to the client. The client gets a `500` (Internal Server Error) response instead. | 0 | No |
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| `memResponseBodyBytes` | Threshold (in bytes) from which the response will be buffered on disk instead of in memory with the `memResponseBodyBytes` option.| 1048576 | No |
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| `retryExpression` | Replay the request using `retryExpression`.<br /> More information [here](#retryexpression). | "" | No |
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### retryExpression
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The retry expression is defined as a logical combination of the functions below with the operators AND (`&&`) and OR (`||`).
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At least one function is required:
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- `Attempts()` number of attempts (the first one counts).
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- `ResponseCode()` response code of the Service.
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- `IsNetworkError()` whether the response code is related to networking error.
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