github.com/adnan-c/fabric_e2e_couchdb@v0.6.1-preview.0.20170228180935-21ce6b23cf91/core/comm/connection.go (about) 1 /* 2 Copyright IBM Corp. 2016 All Rights Reserved. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package comm 18 19 import ( 20 "os" 21 "time" 22 23 "google.golang.org/grpc" 24 "google.golang.org/grpc/credentials" 25 "google.golang.org/grpc/grpclog" 26 27 "github.com/op/go-logging" 28 "github.com/spf13/viper" 29 ) 30 31 const defaultTimeout = time.Second * 3 32 33 var commLogger = logging.MustGetLogger("comm") 34 35 func getEnv(key, def string) string { 36 val := os.Getenv(key) 37 if len(val) > 0 { 38 return val 39 } else { 40 return def 41 } 42 } 43 44 func GetPeerTestingAddress(port string) string { 45 return getEnv("UNIT_TEST_PEER_IP", "localhost") + ":" + port 46 } 47 48 // NewClientConnectionWithAddress Returns a new grpc.ClientConn to the given address. 49 func NewClientConnectionWithAddress(peerAddress string, block bool, tslEnabled bool, creds credentials.TransportCredentials) (*grpc.ClientConn, error) { 50 var opts []grpc.DialOption 51 if tslEnabled { 52 opts = append(opts, grpc.WithTransportCredentials(creds)) 53 } else { 54 opts = append(opts, grpc.WithInsecure()) 55 } 56 opts = append(opts, grpc.WithTimeout(defaultTimeout)) 57 if block { 58 opts = append(opts, grpc.WithBlock()) 59 } 60 conn, err := grpc.Dial(peerAddress, opts...) 61 if err != nil { 62 return nil, err 63 } 64 return conn, err 65 } 66 67 // InitTLSForPeer returns TLS credentials for peer 68 func InitTLSForPeer() credentials.TransportCredentials { 69 var sn string 70 if viper.GetString("peer.tls.serverhostoverride") != "" { 71 sn = viper.GetString("peer.tls.serverhostoverride") 72 } 73 var creds credentials.TransportCredentials 74 if viper.GetString("peer.tls.cert.file") != "" { 75 var err error 76 creds, err = credentials.NewClientTLSFromFile(viper.GetString("peer.tls.cert.file"), sn) 77 if err != nil { 78 grpclog.Fatalf("Failed to create TLS credentials %v", err) 79 } 80 } else { 81 creds = credentials.NewClientTLSFromCert(nil, sn) 82 } 83 return creds 84 }