gitee.com/ks-custle/core-gm@v0.0.0-20230922171213-b83bdd97b62c/grpc/internal/credentials/util.go (about)

     1  /*
     2   *
     3   * Copyright 2020 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  
    19  package credentials
    20  
    21  import (
    22  	tls "gitee.com/ks-custle/core-gm/gmtls"
    23  )
    24  
    25  const alpnProtoStrH2 = "h2"
    26  
    27  // AppendH2ToNextProtos appends h2 to next protos.
    28  func AppendH2ToNextProtos(ps []string) []string {
    29  	for _, p := range ps {
    30  		if p == alpnProtoStrH2 {
    31  			return ps
    32  		}
    33  	}
    34  	ret := make([]string, 0, len(ps)+1)
    35  	ret = append(ret, ps...)
    36  	return append(ret, alpnProtoStrH2)
    37  }
    38  
    39  // CloneTLSConfig returns a shallow clone of the exported
    40  // fields of cfg, ignoring the unexported sync.Once, which
    41  // contains a mutex and must not be copied.
    42  //
    43  // If cfg is nil, a new zero tls.Config is returned.
    44  //
    45  // TODO: inline this function if possible.
    46  func CloneTLSConfig(cfg *tls.Config) *tls.Config {
    47  	if cfg == nil {
    48  		return &tls.Config{}
    49  	}
    50  
    51  	return cfg.Clone()
    52  }