github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/grpc/peer/peer.go (about)

     1  /*
     2   *
     3   * Copyright 2014 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 peer defines various peer information associated with RPCs and
    20  // corresponding utils.
    21  package peer
    22  
    23  import (
    24  	"context"
    25  	"net"
    26  
    27  	"github.com/hxx258456/ccgo/grpc/credentials"
    28  )
    29  
    30  // Peer contains the information of the peer for an RPC, such as the address
    31  // and authentication information.
    32  type Peer struct {
    33  	// Addr is the peer address.
    34  	Addr net.Addr
    35  	// AuthInfo is the authentication information of the transport.
    36  	// It is nil if there is no transport security being used.
    37  	AuthInfo credentials.AuthInfo
    38  }
    39  
    40  type peerKey struct{}
    41  
    42  // NewContext creates a new context with peer information attached.
    43  func NewContext(ctx context.Context, p *Peer) context.Context {
    44  	return context.WithValue(ctx, peerKey{}, p)
    45  }
    46  
    47  // FromContext returns the peer information in ctx if it exists.
    48  func FromContext(ctx context.Context) (p *Peer, ok bool) {
    49  	p, ok = ctx.Value(peerKey{}).(*Peer)
    50  	return
    51  }