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protolator_handlers.go
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/
protolator_handlers.go
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/*
Copyright IBM Corp. 2017 All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package rest
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
"reflect"
"github.com/golang/protobuf/proto"
"github.com/gorilla/mux"
"github.com/hyperledger/fabric/common/tools/protolator"
)
func getMsgType(r *http.Request) (proto.Message, error) {
vars := mux.Vars(r)
msgName := vars["msgName"] // Will not arrive is unset
msgType := proto.MessageType(msgName)
if msgType == nil {
return nil, fmt.Errorf("message name not found")
}
return reflect.New(msgType.Elem()).Interface().(proto.Message), nil
}
func Decode(w http.ResponseWriter, r *http.Request) {
msg, err := getMsgType(r)
if err != nil {
w.WriteHeader(http.StatusNotFound)
fmt.Fprintln(w, err)
return
}
buf, err := ioutil.ReadAll(r.Body)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintln(w, err)
return
}
err = proto.Unmarshal(buf, msg)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintln(w, err)
return
}
var buffer bytes.Buffer
err = protolator.DeepMarshalJSON(&buffer, msg)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintln(w, err)
return
}
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
buffer.WriteTo(w)
}
func Encode(w http.ResponseWriter, r *http.Request) {
msg, err := getMsgType(r)
if err != nil {
w.WriteHeader(http.StatusNotFound)
fmt.Fprintln(w, err)
return
}
err = protolator.DeepUnmarshalJSON(r.Body, msg)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintln(w, err)
return
}
data, err := proto.Marshal(msg)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintln(w, err)
return
}
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/octet-stream")
w.Write(data)
}