fix: remove unused grpcws code

Signed-off-by: Alexander Trost <[email protected]>

pkg/grpc/grpcws/grpcweb_response.go

@@ -80,7 +80,7 @@ func (w *grpcWebResponse) prepareHeaders() {
 	responseHeaderKeys := headerKeys(wh)
 	responseHeaderKeys = append(responseHeaderKeys, "grpc-status", "grpc-message")
 	wh.Set(
-		http.CanonicalHeaderKey("access-control-expose-headers"),
+		"access-control-expose-headers",
 		strings.Join(responseHeaderKeys, ", "),
 	)
 }

pkg/grpc/grpcws/header.go

@@ -45,7 +45,7 @@ func replaceInVals(key, old, new string) copyOption {
 		opts.replacers = append(
 			opts.replacers,
 			func(k string, vv []string) (string, []string, bool) {
-				if strings.ToLower(key) == strings.ToLower(k) {
+				if strings.EqualFold(key, k) {
 					vv2 := make([]string, 0, len(vv))
 					for _, v := range vv {
 						vv2 = append(
@@ -91,20 +91,6 @@ func keyCase(fn func(string) string) copyOption {
 	}
 }
 
-// keyTrim returns an option to unconditionally trim the keys of the
-// destination header with function fn. Typically fn can be
-// strings.Trim, strings.TrimLeft/TrimRight, strings.TrimPrefix/TrimSuffix
-func keyTrim(fn func(string, string) string, cut string) copyOption {
-	return func(opts *copyOptions) {
-		opts.replacers = append(
-			opts.replacers,
-			func(k string, vv []string) (string, []string, bool) {
-				return fn(k, cut), vv, true
-			},
-		)
-	}
-}
-
 // copyHeader copies src to dst header. This function does not uses http.Header
 // methods internally, so header keys are copied as is. If any key normalization
 // is required, use keyCase option.

pkg/grpc/grpcws/wrapper_test.go

@@ -392,6 +392,7 @@ func (s *GrpcWebWrapperTestSuite) TestPingStream_NormalGrpcWorks() {
 	bidiClient.Send(&testproto.PingRequest{Value: "one"})
 	bidiClient.Send(&testproto.PingRequest{Value: "two"})
 	resp, err := bidiClient.CloseAndRecv()
+	assert.NoError(s.T(), err, "no error during execution")
 	assert.Equal(s.T(), "one,two", resp.GetValue(), "expected concatenated value must be received")
 	recvHeaders, err := bidiClient.Header()
 	require.NoError(s.T(), err, "no error during execution")