traefik/pkg/middlewares/buffering/buffering.go

56 lines
1.6 KiB
Go
Raw Normal View History

2018-11-14 09:18:03 +00:00
package buffering
import (
"context"
"net/http"
2019-08-03 01:58:23 +00:00
"github.com/containous/traefik/v2/pkg/config/dynamic"
2019-09-13 17:28:04 +00:00
"github.com/containous/traefik/v2/pkg/log"
2019-08-03 01:58:23 +00:00
"github.com/containous/traefik/v2/pkg/middlewares"
"github.com/containous/traefik/v2/pkg/tracing"
2018-11-14 09:18:03 +00:00
"github.com/opentracing/opentracing-go/ext"
oxybuffer "github.com/vulcand/oxy/buffer"
)
const (
typeName = "Buffer"
)
type buffer struct {
name string
buffer *oxybuffer.Buffer
}
// New creates a buffering middleware.
func New(ctx context.Context, next http.Handler, config dynamic.Buffering, name string) (http.Handler, error) {
2019-09-13 17:28:04 +00:00
logger := log.FromContext(middlewares.GetLoggerCtx(ctx, name, typeName))
2018-11-14 09:18:03 +00:00
logger.Debug("Creating middleware")
logger.Debugf("Setting up buffering: request limits: %d (mem), %d (max), response limits: %d (mem), %d (max) with retry: '%s'",
2018-11-14 09:18:03 +00:00
config.MemRequestBodyBytes, config.MaxRequestBodyBytes, config.MemResponseBodyBytes, config.MaxResponseBodyBytes, config.RetryExpression)
oxyBuffer, err := oxybuffer.New(
next,
oxybuffer.MemRequestBodyBytes(config.MemRequestBodyBytes),
oxybuffer.MaxRequestBodyBytes(config.MaxRequestBodyBytes),
oxybuffer.MemResponseBodyBytes(config.MemResponseBodyBytes),
oxybuffer.MaxResponseBodyBytes(config.MaxResponseBodyBytes),
oxybuffer.CondSetter(len(config.RetryExpression) > 0, oxybuffer.Retry(config.RetryExpression)),
)
if err != nil {
return nil, err
}
return &buffer{
name: name,
buffer: oxyBuffer,
}, nil
}
func (b *buffer) GetTracingInformation() (string, ext.SpanKindEnum) {
return b.name, tracing.SpanKindNoneEnum
}
func (b *buffer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
b.buffer.ServeHTTP(rw, req)
}