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-rw-r--r--vendor/google.golang.org/appengine/identity.go142
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1// Copyright 2011 Google Inc. All rights reserved.
2// Use of this source code is governed by the Apache 2.0
3// license that can be found in the LICENSE file.
4
5package appengine
6
7import (
8 "time"
9
10 "golang.org/x/net/context"
11
12 "google.golang.org/appengine/internal"
13 pb "google.golang.org/appengine/internal/app_identity"
14 modpb "google.golang.org/appengine/internal/modules"
15)
16
17// AppID returns the application ID for the current application.
18// The string will be a plain application ID (e.g. "appid"), with a
19// domain prefix for custom domain deployments (e.g. "example.com:appid").
20func AppID(c context.Context) string { return internal.AppID(c) }
21
22// DefaultVersionHostname returns the standard hostname of the default version
23// of the current application (e.g. "my-app.appspot.com"). This is suitable for
24// use in constructing URLs.
25func DefaultVersionHostname(c context.Context) string {
26 return internal.DefaultVersionHostname(c)
27}
28
29// ModuleName returns the module name of the current instance.
30func ModuleName(c context.Context) string {
31 return internal.ModuleName(c)
32}
33
34// ModuleHostname returns a hostname of a module instance.
35// If module is the empty string, it refers to the module of the current instance.
36// If version is empty, it refers to the version of the current instance if valid,
37// or the default version of the module of the current instance.
38// If instance is empty, ModuleHostname returns the load-balancing hostname.
39func ModuleHostname(c context.Context, module, version, instance string) (string, error) {
40 req := &modpb.GetHostnameRequest{}
41 if module != "" {
42 req.Module = &module
43 }
44 if version != "" {
45 req.Version = &version
46 }
47 if instance != "" {
48 req.Instance = &instance
49 }
50 res := &modpb.GetHostnameResponse{}
51 if err := internal.Call(c, "modules", "GetHostname", req, res); err != nil {
52 return "", err
53 }
54 return *res.Hostname, nil
55}
56
57// VersionID returns the version ID for the current application.
58// It will be of the form "X.Y", where X is specified in app.yaml,
59// and Y is a number generated when each version of the app is uploaded.
60// It does not include a module name.
61func VersionID(c context.Context) string { return internal.VersionID(c) }
62
63// InstanceID returns a mostly-unique identifier for this instance.
64func InstanceID() string { return internal.InstanceID() }
65
66// Datacenter returns an identifier for the datacenter that the instance is running in.
67func Datacenter(c context.Context) string { return internal.Datacenter(c) }
68
69// ServerSoftware returns the App Engine release version.
70// In production, it looks like "Google App Engine/X.Y.Z".
71// In the development appserver, it looks like "Development/X.Y".
72func ServerSoftware() string { return internal.ServerSoftware() }
73
74// RequestID returns a string that uniquely identifies the request.
75func RequestID(c context.Context) string { return internal.RequestID(c) }
76
77// AccessToken generates an OAuth2 access token for the specified scopes on
78// behalf of service account of this application. This token will expire after
79// the returned time.
80func AccessToken(c context.Context, scopes ...string) (token string, expiry time.Time, err error) {
81 req := &pb.GetAccessTokenRequest{Scope: scopes}
82 res := &pb.GetAccessTokenResponse{}
83
84 err = internal.Call(c, "app_identity_service", "GetAccessToken", req, res)
85 if err != nil {
86 return "", time.Time{}, err
87 }
88 return res.GetAccessToken(), time.Unix(res.GetExpirationTime(), 0), nil
89}
90
91// Certificate represents a public certificate for the app.
92type Certificate struct {
93 KeyName string
94 Data []byte // PEM-encoded X.509 certificate
95}
96
97// PublicCertificates retrieves the public certificates for the app.
98// They can be used to verify a signature returned by SignBytes.
99func PublicCertificates(c context.Context) ([]Certificate, error) {
100 req := &pb.GetPublicCertificateForAppRequest{}
101 res := &pb.GetPublicCertificateForAppResponse{}
102 if err := internal.Call(c, "app_identity_service", "GetPublicCertificatesForApp", req, res); err != nil {
103 return nil, err
104 }
105 var cs []Certificate
106 for _, pc := range res.PublicCertificateList {
107 cs = append(cs, Certificate{
108 KeyName: pc.GetKeyName(),
109 Data: []byte(pc.GetX509CertificatePem()),
110 })
111 }
112 return cs, nil
113}
114
115// ServiceAccount returns a string representing the service account name, in
116// the form of an email address (typically app_id@appspot.gserviceaccount.com).
117func ServiceAccount(c context.Context) (string, error) {
118 req := &pb.GetServiceAccountNameRequest{}
119 res := &pb.GetServiceAccountNameResponse{}
120
121 err := internal.Call(c, "app_identity_service", "GetServiceAccountName", req, res)
122 if err != nil {
123 return "", err
124 }
125 return res.GetServiceAccountName(), err
126}
127
128// SignBytes signs bytes using a private key unique to your application.
129func SignBytes(c context.Context, bytes []byte) (keyName string, signature []byte, err error) {
130 req := &pb.SignForAppRequest{BytesToSign: bytes}
131 res := &pb.SignForAppResponse{}
132
133 if err := internal.Call(c, "app_identity_service", "SignForApp", req, res); err != nil {
134 return "", nil, err
135 }
136 return res.GetKeyName(), res.GetSignatureBytes(), nil
137}
138
139func init() {
140 internal.RegisterErrorCodeMap("app_identity_service", pb.AppIdentityServiceError_ErrorCode_name)
141 internal.RegisterErrorCodeMap("modules", modpb.ModulesServiceError_ErrorCode_name)
142}