traefik/pkg/middlewares/buffering/buffering.go
2024-01-08 09:10:06 +01:00

57 lines
1.7 KiB
Go

package buffering
import (
"context"
"net/http"
"github.com/rs/zerolog"
"github.com/traefik/traefik/v3/pkg/config/dynamic"
"github.com/traefik/traefik/v3/pkg/logs"
"github.com/traefik/traefik/v3/pkg/middlewares"
oxybuffer "github.com/vulcand/oxy/v2/buffer"
"go.opentelemetry.io/otel/trace"
)
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) {
logger := middlewares.GetLogger(ctx, name, typeName)
logger.Debug().Msg("Creating middleware")
logger.Debug().Msgf("Setting up buffering: request limits: %d (mem), %d (max), response limits: %d (mem), %d (max) with retry: '%s'",
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.Logger(logs.NewOxyWrapper(*logger)),
oxybuffer.Verbose(logger.GetLevel() == zerolog.TraceLevel),
oxybuffer.Cond(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, string, trace.SpanKind) {
return b.name, typeName, trace.SpanKindInternal
}
func (b *buffer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
b.buffer.ServeHTTP(rw, req)
}