Remove returns http-status bad request

gzhttp/compress.go

@@ -465,12 +465,9 @@ func NewWrapper(opts ...option) (func(http.Handler) http.HandlerFunc, error) {
 		return func(w http.ResponseWriter, r *http.Request) {
 			w.Header().Add(vary, acceptEncoding)
 			if contentGzip(r) {
-				readerGzipBody, err := gzip.NewReader(r.Body)
-				if err != nil {
-					http.Error(w, err.Error(), http.StatusBadRequest)
-					return
+				if readerGzipBody, err := gzip.NewReader(r.Body); err == nil {
+					r.Body = io.NopCloser(readerGzipBody)
 				}
-				r.Body = io.NopCloser(readerGzipBody)
 			}
 
 			if acceptsGzip(r) {

gzhttp/compress_test.go

@@ -90,16 +90,6 @@ func TestMustNewGzipHandler(t *testing.T) {
 
 	assertEqual(t, http.DetectContentType([]byte(testBody)), res3.Header().Get("Content-Type"))
 
-	// send not compress request body
-
-	req4, _ := http.NewRequest("POST", "/whatever", bytes.NewBuffer(testBody))
-	req4.Header.Set("Content-Encoding", "gzip")
-	resp4 := httptest.NewRecorder()
-	handler.ServeHTTP(resp4, req4)
-	res4 := resp4.Result()
-
-	assertEqual(t, 400, res4.StatusCode)
-
 	// send compress request body
 
 	var b bytes.Buffer