github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/grpc/xds/internal/xdsclient/bootstrap/template.go (about)

     1  /*
     2   *
     3   * Copyright 2021 gRPC authors.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package bootstrap
    19  
    20  import (
    21  	"net/url"
    22  	"strings"
    23  )
    24  
    25  // PopulateResourceTemplate populates the given template using the target
    26  // string. "%s", if exists in the template, will be replaced with target.
    27  //
    28  // If the template starts with "xdstp:", the replaced string will be %-encoded.
    29  // But note that "/" is not percent encoded.
    30  func PopulateResourceTemplate(template, target string) string {
    31  	if !strings.Contains(template, "%s") {
    32  		return template
    33  	}
    34  	if strings.HasPrefix(template, "xdstp:") {
    35  		target = percentEncode(target)
    36  	}
    37  	return strings.Replace(template, "%s", target, -1)
    38  }
    39  
    40  // percentEncode percent encode t, except for "/". See the tests for examples.
    41  func percentEncode(t string) string {
    42  	segs := strings.Split(t, "/")
    43  	for i := range segs {
    44  		segs[i] = url.PathEscape(segs[i])
    45  	}
    46  	return strings.Join(segs, "/")
    47  }