blob: cd45547854f0748d2f373f0772ef0a69eda9c97d [file] [log] [blame]
khenaidoo5fc5cea2021-08-11 17:39:16 -04001/*
2 *
3 * Copyright 2019 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
19package grpc
20
21import (
22 "google.golang.org/grpc/codes"
23 "google.golang.org/grpc/status"
24)
25
26// PreparedMsg is responsible for creating a Marshalled and Compressed object.
27//
Joey Armstrongba3d9d12024-01-15 14:22:11 -050028// # Experimental
khenaidoo5fc5cea2021-08-11 17:39:16 -040029//
30// Notice: This type is EXPERIMENTAL and may be changed or removed in a
31// later release.
32type PreparedMsg struct {
33 // Struct for preparing msg before sending them
34 encodedData []byte
35 hdr []byte
36 payload []byte
37}
38
39// Encode marshalls and compresses the message using the codec and compressor for the stream.
40func (p *PreparedMsg) Encode(s Stream, msg interface{}) error {
41 ctx := s.Context()
42 rpcInfo, ok := rpcInfoFromContext(ctx)
43 if !ok {
44 return status.Errorf(codes.Internal, "grpc: unable to get rpcInfo")
45 }
46
47 // check if the context has the relevant information to prepareMsg
48 if rpcInfo.preloaderInfo == nil {
49 return status.Errorf(codes.Internal, "grpc: rpcInfo.preloaderInfo is nil")
50 }
51 if rpcInfo.preloaderInfo.codec == nil {
52 return status.Errorf(codes.Internal, "grpc: rpcInfo.preloaderInfo.codec is nil")
53 }
54
55 // prepare the msg
56 data, err := encode(rpcInfo.preloaderInfo.codec, msg)
57 if err != nil {
58 return err
59 }
60 p.encodedData = data
61 compData, err := compress(data, rpcInfo.preloaderInfo.cp, rpcInfo.preloaderInfo.comp)
62 if err != nil {
63 return err
64 }
65 p.hdr, p.payload = msgHeader(data, compData)
66 return nil
67}