58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package compress
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import (
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"compress/gzip"
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"context"
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"net/http"
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"strings"
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"github.com/NYTimes/gziphandler"
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"github.com/containous/traefik/middlewares"
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"github.com/containous/traefik/tracing"
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"github.com/opentracing/opentracing-go/ext"
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"github.com/sirupsen/logrus"
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)
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const (
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typeName = "Compress"
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)
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// Compress is a middleware that allows to compress the response.
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type compress struct {
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next http.Handler
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name string
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}
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// New creates a new compress middleware.
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func New(ctx context.Context, next http.Handler, name string) (http.Handler, error) {
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middlewares.GetLogger(ctx, name, typeName).Debug("Creating middleware")
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return &compress{
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next: next,
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name: name,
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}, nil
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}
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func (c *compress) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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contentType := req.Header.Get("Content-Type")
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if strings.HasPrefix(contentType, "application/grpc") {
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c.next.ServeHTTP(rw, req)
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} else {
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gzipHandler(c.next, middlewares.GetLogger(req.Context(), c.name, typeName)).ServeHTTP(rw, req)
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}
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}
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func (c *compress) GetTracingInformation() (string, ext.SpanKindEnum) {
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return c.name, tracing.SpanKindNoneEnum
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}
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func gzipHandler(h http.Handler, logger logrus.FieldLogger) http.Handler {
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wrapper, err := gziphandler.GzipHandlerWithOpts(
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gziphandler.CompressionLevel(gzip.DefaultCompression),
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gziphandler.MinSize(gziphandler.DefaultMinSize))
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if err != nil {
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logger.Error(err)
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}
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return wrapper(h)
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}
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