Revert "Merge v1.4.2 into master"

middlewares/compress.go

@@ -3,7 +3,6 @@ package middlewares
 import (
 	"compress/gzip"
 	"net/http"
-	"strings"
 
 	"github.com/NYTimes/gziphandler"
 	"github.com/containous/traefik/log"
@@ -14,12 +13,7 @@ type Compress struct{}
 
 // ServerHTTP 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)
-	}
+	gzipHandler(next).ServeHTTP(rw, r)
 }
 
 func gzipHandler(h http.Handler) http.Handler {