package buffering import ( "context" "net/http" "github.com/opentracing/opentracing-go/ext" "github.com/traefik/traefik/v2/pkg/config/dynamic" "github.com/traefik/traefik/v2/pkg/log" "github.com/traefik/traefik/v2/pkg/middlewares" "github.com/traefik/traefik/v2/pkg/tracing" oxybuffer "github.com/vulcand/oxy/v2/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) { logger := log.FromContext(middlewares.GetLoggerCtx(ctx, name, typeName)) logger.Debug("Creating middleware") logger.Debugf("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.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, ext.SpanKindEnum) { return b.name, tracing.SpanKindNoneEnum } func (b *buffer) ServeHTTP(rw http.ResponseWriter, req *http.Request) { b.buffer.ServeHTTP(rw, req) }