traefik/middlewares/compress.go
2018-08-02 17:14:03 +02:00

33 lines
815 B
Go

package middlewares
import (
"compress/gzip"
"net/http"
"strings"
"github.com/NYTimes/gziphandler"
"github.com/containous/traefik/log"
)
// Compress is a middleware that allows to compress the response
type Compress struct{}
// ServeHTTP is a function used by Negroni
func (c *Compress) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
contentType := r.Header.Get("Content-Type")
if strings.HasPrefix(contentType, "application/grpc") {
next.ServeHTTP(rw, r)
} else {
gzipHandler(next).ServeHTTP(rw, r)
}
}
func gzipHandler(h http.Handler) http.Handler {
wrapper, err := gziphandler.GzipHandlerWithOpts(
gziphandler.CompressionLevel(gzip.DefaultCompression),
gziphandler.MinSize(gziphandler.DefaultMinSize))
if err != nil {
log.Error(err)
}
return wrapper(h)
}