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/
response.go
executable file
·82 lines (74 loc) · 2.01 KB
/
response.go
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// Copyright 2020 Asim Aslam
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Original source: github.com/micro/go-micro/v3/client/grpc/response.go
package grpc
import (
"encoding/json"
"strings"
"github.com/2637309949/micro/v3/service/errors"
"github.com/2637309949/micro/v3/util/codec"
"github.com/2637309949/micro/v3/util/codec/bytes"
"google.golang.org/grpc"
"google.golang.org/grpc/encoding"
"google.golang.org/grpc/status"
)
type response struct {
conn *poolConn
stream grpc.ClientStream
codec encoding.Codec
gcodec codec.Codec
}
// Read the response
func (r *response) Codec() codec.Reader {
return r.gcodec
}
// read the header
func (r *response) Header() map[string]string {
md, err := r.stream.Header()
if err != nil {
return map[string]string{}
}
hdr := make(map[string]string, len(md))
for k, v := range md {
hdr[k] = strings.Join(v, ",")
}
return hdr
}
// Read the undecoded response
func (r *response) Read() ([]byte, error) {
f := &bytes.Frame{}
if err := r.gcodec.ReadBody(f); err != nil {
gerr, ok := status.FromError(err)
if ok {
return nil, grpcErrToMicroErr(gerr)
}
return nil, err
}
return f.Data, nil
}
func grpcErrToMicroErr(stat *status.Status) error {
// try to pull our a micro error from the message. Sometimes this is deeply nested so loop
errBytes := []byte(stat.Message())
var ret error
ret = stat.Err()
for {
merr := &errors.Error{}
if err := json.Unmarshal(errBytes, merr); err != nil {
return ret
}
ret = merr
errBytes = []byte(merr.Detail)
}
}