snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

internal/xds/bootstrap/template.go

@@ -0,0 +1,47 @@
+/*
+ *
+ * Copyright 2021 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package bootstrap
+
+import (
+	"net/url"
+	"strings"
+)
+
+// PopulateResourceTemplate populates the given template using the target
+// string. "%s", if exists in the template, will be replaced with target.
+//
+// If the template starts with "xdstp:", the replaced string will be %-encoded.
+// But note that "/" is not percent encoded.
+func PopulateResourceTemplate(template, target string) string {
+	if !strings.Contains(template, "%s") {
+		return template
+	}
+	if strings.HasPrefix(template, "xdstp:") {
+		target = percentEncode(target)
+	}
+	return strings.ReplaceAll(template, "%s", target)
+}
+
+// percentEncode percent encode t, except for "/". See the tests for examples.
+func percentEncode(t string) string {
+	segs := strings.Split(t, "/")
+	for i := range segs {
+		segs[i] = url.PathEscape(segs[i])
+	}
+	return strings.Join(segs, "/")
+}