forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 1
/
dial.go
135 lines (126 loc) · 4 KB
/
dial.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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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.
package transport
import (
"errors"
"fmt"
"net/http"
"golang.org/x/net/context"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/cloud"
"google.golang.org/cloud/internal/opts"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/credentials/oauth"
)
// ErrHTTP is returned when on a non-200 HTTP response.
type ErrHTTP struct {
StatusCode int
Body []byte
err error
}
func (e *ErrHTTP) Error() string {
if e.err == nil {
return fmt.Sprintf("error during call, http status code: %v %s", e.StatusCode, e.Body)
}
return e.err.Error()
}
// NewHTTPClient returns an HTTP client for use communicating with a Google cloud
// service, configured with the given ClientOptions. It also returns the endpoint
// for the service as specified in the options.
func NewHTTPClient(ctx context.Context, opt ...cloud.ClientOption) (*http.Client, string, error) {
var o opts.DialOpt
for _, opt := range opt {
opt.Resolve(&o)
}
if o.GRPCClient != nil {
return nil, "", errors.New("unsupported GRPC base transport specified")
}
// TODO(djd): Wrap all http.Clients with appropriate internal version to add
// UserAgent header and prepend correct endpoint.
if o.HTTPClient != nil {
return o.HTTPClient, o.Endpoint, nil
}
if o.TokenSource == nil {
var err error
o.TokenSource, err = google.DefaultTokenSource(ctx, o.Scopes...)
if err != nil {
return nil, "", fmt.Errorf("google.DefaultTokenSource: %v", err)
}
}
return oauth2.NewClient(ctx, o.TokenSource), o.Endpoint, nil
}
// NewProtoClient returns a ProtoClient for communicating with a Google cloud service,
// configured with the given ClientOptions.
func NewProtoClient(ctx context.Context, opt ...cloud.ClientOption) (*ProtoClient, error) {
var o opts.DialOpt
for _, opt := range opt {
opt.Resolve(&o)
}
if o.GRPCClient != nil {
return nil, errors.New("unsupported GRPC base transport specified")
}
var client *http.Client
switch {
case o.HTTPClient != nil:
if o.TokenSource != nil {
return nil, errors.New("at most one of WithTokenSource or WithBaseHTTP may be provided")
}
client = o.HTTPClient
case o.TokenSource != nil:
client = oauth2.NewClient(ctx, o.TokenSource)
default:
var err error
client, err = google.DefaultClient(ctx, o.Scopes...)
if err != nil {
return nil, err
}
}
return &ProtoClient{
client: client,
endpoint: o.Endpoint,
userAgent: o.UserAgent,
}, nil
}
// DialGRPC returns a GRPC connection for use communicating with a Google cloud
// service, configured with the given ClientOptions.
func DialGRPC(ctx context.Context, opt ...cloud.ClientOption) (*grpc.ClientConn, error) {
var o opts.DialOpt
for _, opt := range opt {
opt.Resolve(&o)
}
if o.HTTPClient != nil {
return nil, errors.New("unsupported HTTP base transport specified")
}
if o.GRPCClient != nil {
return o.GRPCClient, nil
}
if o.TokenSource == nil {
var err error
o.TokenSource, err = google.DefaultTokenSource(ctx, o.Scopes...)
if err != nil {
return nil, fmt.Errorf("google.DefaultTokenSource: %v", err)
}
}
grpcOpts := []grpc.DialOption{
grpc.WithPerRPCCredentials(oauth.TokenSource{o.TokenSource}),
grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")),
}
grpcOpts = append(grpcOpts, o.GRPCDialOpts...)
if o.UserAgent != "" {
grpcOpts = append(grpcOpts, grpc.WithUserAgent(o.UserAgent))
}
return grpc.Dial(o.Endpoint, grpcOpts...)
}