github.com/myafeier/fabric@v1.0.1-0.20170722181825-3a4b1f2bce86/common/tools/configtxlator/rest/protolator_handlers.go (about) 1 /* 2 Copyright IBM Corp. 2017 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 rest 18 19 import ( 20 "bytes" 21 "fmt" 22 "io/ioutil" 23 "net/http" 24 "reflect" 25 26 "github.com/hyperledger/fabric/common/tools/protolator" 27 28 // Import these to register the proto types 29 _ "github.com/hyperledger/fabric/protos/common" 30 _ "github.com/hyperledger/fabric/protos/msp" 31 _ "github.com/hyperledger/fabric/protos/orderer" 32 _ "github.com/hyperledger/fabric/protos/peer" 33 34 "github.com/golang/protobuf/proto" 35 "github.com/gorilla/mux" 36 ) 37 38 func getMsgType(r *http.Request) (proto.Message, error) { 39 vars := mux.Vars(r) 40 msgName := vars["msgName"] // Will not arrive is unset 41 42 msgType := proto.MessageType(msgName) 43 if msgType == nil { 44 return nil, fmt.Errorf("message name not found") 45 } 46 return reflect.New(msgType.Elem()).Interface().(proto.Message), nil 47 } 48 49 func Decode(w http.ResponseWriter, r *http.Request) { 50 msg, err := getMsgType(r) 51 if err != nil { 52 w.WriteHeader(http.StatusNotFound) 53 fmt.Fprintln(w, err) 54 return 55 } 56 57 buf, err := ioutil.ReadAll(r.Body) 58 if err != nil { 59 w.WriteHeader(http.StatusBadRequest) 60 fmt.Fprintln(w, err) 61 return 62 } 63 64 err = proto.Unmarshal(buf, msg) 65 if err != nil { 66 w.WriteHeader(http.StatusBadRequest) 67 fmt.Fprintln(w, err) 68 return 69 } 70 71 var buffer bytes.Buffer 72 err = protolator.DeepMarshalJSON(&buffer, msg) 73 if err != nil { 74 w.WriteHeader(http.StatusBadRequest) 75 fmt.Fprintln(w, err) 76 return 77 } 78 79 w.WriteHeader(http.StatusOK) 80 w.Header().Set("Content-Type", "application/json") 81 buffer.WriteTo(w) 82 } 83 84 func Encode(w http.ResponseWriter, r *http.Request) { 85 msg, err := getMsgType(r) 86 if err != nil { 87 w.WriteHeader(http.StatusNotFound) 88 fmt.Fprintln(w, err) 89 return 90 } 91 92 err = protolator.DeepUnmarshalJSON(r.Body, msg) 93 if err != nil { 94 w.WriteHeader(http.StatusBadRequest) 95 fmt.Fprintln(w, err) 96 return 97 } 98 99 data, err := proto.Marshal(msg) 100 if err != nil { 101 w.WriteHeader(http.StatusBadRequest) 102 fmt.Fprintln(w, err) 103 return 104 } 105 106 w.WriteHeader(http.StatusOK) 107 w.Header().Set("Content-Type", "application/octet-stream") 108 w.Write(data) 109 }