forked from cockroachdb/cockroach
-
Notifications
You must be signed in to change notification settings - Fork 0
/
grpc_util.go
52 lines (45 loc) · 1.67 KB
/
grpc_util.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
// Copyright 2014 The Cockroach Authors.
//
// 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
//
// http://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.
//
// Author: Tamir Duberstein (tamird@gmail.com)
package grpcutil
import (
"net/http"
"strings"
"golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/transport"
"github.com/cockroachdb/cockroach/util"
)
// IsGRPCRequest returns true if r came from a grpc client.
//
// Its logic is a partial recreation of gRPC's internal checks, see
// https://github.com/grpc/grpc-go/blob/01de3de/transport/handler_server.go#L61:L69
func IsGRPCRequest(r *http.Request) bool {
return r.ProtoMajor == 2 && strings.Contains(r.Header.Get(util.ContentTypeHeader), "application/grpc")
}
// IsClosedConnection returns true if err is an error produced by gRPC on closed connections.
func IsClosedConnection(err error) bool {
if err == context.Canceled ||
grpc.Code(err) == codes.Canceled ||
grpc.ErrorDesc(err) == grpc.ErrClientConnClosing.Error() ||
strings.Contains(err.Error(), "is closing") {
return true
}
if streamErr, ok := err.(transport.StreamError); ok && streamErr.Code == codes.Canceled {
return true
}
return util.IsClosedConnection(err)
}