Documentation ¶
Overview ¶
Package oauth2 provides access to the Google OAuth2 API.
See https://developers.google.com/accounts/docs/OAuth2
Usage example:
import "google.golang.org/api/oauth2/v1" ... oauth2Service, err := oauth2.New(oauthHttpClient)
Index ¶
- Constants
- type GetCertForOpenIdConnectCall
- func (c *GetCertForOpenIdConnectCall) Context(ctx context.Context) *GetCertForOpenIdConnectCall
- func (c *GetCertForOpenIdConnectCall) Do(opts ...googleapi.CallOption) (map[string]string, error)
- func (c *GetCertForOpenIdConnectCall) Fields(s ...googleapi.Field) *GetCertForOpenIdConnectCall
- func (c *GetCertForOpenIdConnectCall) IfNoneMatch(entityTag string) *GetCertForOpenIdConnectCall
- type GetCertForOpenIdConnectRawCall
- func (c *GetCertForOpenIdConnectRawCall) Context(ctx context.Context) *GetCertForOpenIdConnectRawCall
- func (c *GetCertForOpenIdConnectRawCall) Do(opts ...googleapi.CallOption) (*Raw, error)
- func (c *GetCertForOpenIdConnectRawCall) Fields(s ...googleapi.Field) *GetCertForOpenIdConnectRawCall
- func (c *GetCertForOpenIdConnectRawCall) IfNoneMatch(entityTag string) *GetCertForOpenIdConnectRawCall
- type GetRobotJwkCall
- type GetRobotMetadataRawCall
- func (c *GetRobotMetadataRawCall) Context(ctx context.Context) *GetRobotMetadataRawCall
- func (c *GetRobotMetadataRawCall) Do(opts ...googleapi.CallOption) (*Raw, error)
- func (c *GetRobotMetadataRawCall) Fields(s ...googleapi.Field) *GetRobotMetadataRawCall
- func (c *GetRobotMetadataRawCall) IfNoneMatch(entityTag string) *GetRobotMetadataRawCall
- type GetRobotMetadataX509Call
- func (c *GetRobotMetadataX509Call) Context(ctx context.Context) *GetRobotMetadataX509Call
- func (c *GetRobotMetadataX509Call) Do(opts ...googleapi.CallOption) (map[string]string, error)
- func (c *GetRobotMetadataX509Call) Fields(s ...googleapi.Field) *GetRobotMetadataX509Call
- func (c *GetRobotMetadataX509Call) IfNoneMatch(entityTag string) *GetRobotMetadataX509Call
- type Jwk
- type JwkKeys
- type Raw
- type RawKeyvalues
- type Service
- func (s *Service) GetCertForOpenIdConnect() *GetCertForOpenIdConnectCall
- func (s *Service) GetCertForOpenIdConnectRaw() *GetCertForOpenIdConnectRawCall
- func (s *Service) GetRobotJwk(robotEmail string) *GetRobotJwkCall
- func (s *Service) GetRobotMetadataRaw(robotEmail string) *GetRobotMetadataRawCall
- func (s *Service) GetRobotMetadataX509(robotEmail string) *GetRobotMetadataX509Call
- func (s *Service) Tokeninfo() *TokeninfoCall
- type Tokeninfo
- type TokeninfoCall
- func (c *TokeninfoCall) AccessToken(accessToken string) *TokeninfoCall
- func (c *TokeninfoCall) Context(ctx context.Context) *TokeninfoCall
- func (c *TokeninfoCall) Do(opts ...googleapi.CallOption) (*Tokeninfo, error)
- func (c *TokeninfoCall) Fields(s ...googleapi.Field) *TokeninfoCall
- func (c *TokeninfoCall) IdToken(idToken string) *TokeninfoCall
- type UserinfoGetCall
- type UserinfoService
- type UserinfoV2MeGetCall
- func (c *UserinfoV2MeGetCall) Context(ctx context.Context) *UserinfoV2MeGetCall
- func (c *UserinfoV2MeGetCall) Do(opts ...googleapi.CallOption) (*Userinfoplus, error)
- func (c *UserinfoV2MeGetCall) Fields(s ...googleapi.Field) *UserinfoV2MeGetCall
- func (c *UserinfoV2MeGetCall) IfNoneMatch(entityTag string) *UserinfoV2MeGetCall
- type UserinfoV2MeService
- type UserinfoV2Service
- type Userinfoplus
Constants ¶
const ( // Know the list of people in your circles, your age range, and language PlusLoginScope = "https://www.googleapis.com/auth/plus.login" // Know who you are on Google PlusMeScope = "https://www.googleapis.com/auth/plus.me" // View your email address UserinfoEmailScope = "https://www.googleapis.com/auth/userinfo.email" // View your basic profile info UserinfoProfileScope = "https://www.googleapis.com/auth/userinfo.profile" )
OAuth2 scopes used by this API.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type GetCertForOpenIdConnectCall ¶
type GetCertForOpenIdConnectCall struct {
// contains filtered or unexported fields
}
func (*GetCertForOpenIdConnectCall) Context ¶
func (c *GetCertForOpenIdConnectCall) Context(ctx context.Context) *GetCertForOpenIdConnectCall
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*GetCertForOpenIdConnectCall) Do ¶
func (c *GetCertForOpenIdConnectCall) Do(opts ...googleapi.CallOption) (map[string]string, error)
Do executes the "oauth2.getCertForOpenIdConnect" call.
func (*GetCertForOpenIdConnectCall) Fields ¶
func (c *GetCertForOpenIdConnectCall) Fields(s ...googleapi.Field) *GetCertForOpenIdConnectCall
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*GetCertForOpenIdConnectCall) IfNoneMatch ¶
func (c *GetCertForOpenIdConnectCall) IfNoneMatch(entityTag string) *GetCertForOpenIdConnectCall
IfNoneMatch sets the optional parameter which makes the operation fail if the object's ETag matches the given value. This is useful for getting updates only after the object has changed since the last request. Use googleapi.IsNotModified to check whether the response error from Do is the result of In-None-Match.
type GetCertForOpenIdConnectRawCall ¶
type GetCertForOpenIdConnectRawCall struct {
// contains filtered or unexported fields
}
func (*GetCertForOpenIdConnectRawCall) Context ¶
func (c *GetCertForOpenIdConnectRawCall) Context(ctx context.Context) *GetCertForOpenIdConnectRawCall
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*GetCertForOpenIdConnectRawCall) Do ¶
func (c *GetCertForOpenIdConnectRawCall) Do(opts ...googleapi.CallOption) (*Raw, error)
Do executes the "oauth2.getCertForOpenIdConnectRaw" call. Exactly one of *Raw or error will be non-nil. Any non-2xx status code is an error. Response headers are in either *Raw.ServerResponse.Header or (if a response was returned at all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified to check whether the returned error was because http.StatusNotModified was returned.
func (*GetCertForOpenIdConnectRawCall) Fields ¶
func (c *GetCertForOpenIdConnectRawCall) Fields(s ...googleapi.Field) *GetCertForOpenIdConnectRawCall
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*GetCertForOpenIdConnectRawCall) IfNoneMatch ¶
func (c *GetCertForOpenIdConnectRawCall) IfNoneMatch(entityTag string) *GetCertForOpenIdConnectRawCall
IfNoneMatch sets the optional parameter which makes the operation fail if the object's ETag matches the given value. This is useful for getting updates only after the object has changed since the last request. Use googleapi.IsNotModified to check whether the response error from Do is the result of In-None-Match.
type GetRobotJwkCall ¶
type GetRobotJwkCall struct {
// contains filtered or unexported fields
}
func (*GetRobotJwkCall) Context ¶
func (c *GetRobotJwkCall) Context(ctx context.Context) *GetRobotJwkCall
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*GetRobotJwkCall) Do ¶
func (c *GetRobotJwkCall) Do(opts ...googleapi.CallOption) (*Jwk, error)
Do executes the "oauth2.getRobotJwk" call. Exactly one of *Jwk or error will be non-nil. Any non-2xx status code is an error. Response headers are in either *Jwk.ServerResponse.Header or (if a response was returned at all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified to check whether the returned error was because http.StatusNotModified was returned.
func (*GetRobotJwkCall) Fields ¶
func (c *GetRobotJwkCall) Fields(s ...googleapi.Field) *GetRobotJwkCall
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*GetRobotJwkCall) IfNoneMatch ¶
func (c *GetRobotJwkCall) IfNoneMatch(entityTag string) *GetRobotJwkCall
IfNoneMatch sets the optional parameter which makes the operation fail if the object's ETag matches the given value. This is useful for getting updates only after the object has changed since the last request. Use googleapi.IsNotModified to check whether the response error from Do is the result of In-None-Match.
type GetRobotMetadataRawCall ¶
type GetRobotMetadataRawCall struct {
// contains filtered or unexported fields
}
func (*GetRobotMetadataRawCall) Context ¶
func (c *GetRobotMetadataRawCall) Context(ctx context.Context) *GetRobotMetadataRawCall
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*GetRobotMetadataRawCall) Do ¶
func (c *GetRobotMetadataRawCall) Do(opts ...googleapi.CallOption) (*Raw, error)
Do executes the "oauth2.getRobotMetadataRaw" call. Exactly one of *Raw or error will be non-nil. Any non-2xx status code is an error. Response headers are in either *Raw.ServerResponse.Header or (if a response was returned at all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified to check whether the returned error was because http.StatusNotModified was returned.
func (*GetRobotMetadataRawCall) Fields ¶
func (c *GetRobotMetadataRawCall) Fields(s ...googleapi.Field) *GetRobotMetadataRawCall
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*GetRobotMetadataRawCall) IfNoneMatch ¶
func (c *GetRobotMetadataRawCall) IfNoneMatch(entityTag string) *GetRobotMetadataRawCall
IfNoneMatch sets the optional parameter which makes the operation fail if the object's ETag matches the given value. This is useful for getting updates only after the object has changed since the last request. Use googleapi.IsNotModified to check whether the response error from Do is the result of In-None-Match.
type GetRobotMetadataX509Call ¶
type GetRobotMetadataX509Call struct {
// contains filtered or unexported fields
}
func (*GetRobotMetadataX509Call) Context ¶
func (c *GetRobotMetadataX509Call) Context(ctx context.Context) *GetRobotMetadataX509Call
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*GetRobotMetadataX509Call) Do ¶
func (c *GetRobotMetadataX509Call) Do(opts ...googleapi.CallOption) (map[string]string, error)
Do executes the "oauth2.getRobotMetadataX509" call.
func (*GetRobotMetadataX509Call) Fields ¶
func (c *GetRobotMetadataX509Call) Fields(s ...googleapi.Field) *GetRobotMetadataX509Call
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*GetRobotMetadataX509Call) IfNoneMatch ¶
func (c *GetRobotMetadataX509Call) IfNoneMatch(entityTag string) *GetRobotMetadataX509Call
IfNoneMatch sets the optional parameter which makes the operation fail if the object's ETag matches the given value. This is useful for getting updates only after the object has changed since the last request. Use googleapi.IsNotModified to check whether the response error from Do is the result of In-None-Match.
type Jwk ¶
type Jwk struct { Keys []*JwkKeys `json:"keys,omitempty"` // ServerResponse contains the HTTP response code and headers from the // server. googleapi.ServerResponse `json:"-"` // ForceSendFields is a list of field names (e.g. "Keys") to // unconditionally include in API requests. By default, fields with // empty values are omitted from API requests. However, any non-pointer, // non-interface field appearing in ForceSendFields will be sent to the // server regardless of whether the field is empty or not. This may be // used to include empty fields in Patch requests. ForceSendFields []string `json:"-"` }
func (*Jwk) MarshalJSON ¶
type JwkKeys ¶
type JwkKeys struct { Alg string `json:"alg,omitempty"` E string `json:"e,omitempty"` Kid string `json:"kid,omitempty"` Kty string `json:"kty,omitempty"` N string `json:"n,omitempty"` Use string `json:"use,omitempty"` // ForceSendFields is a list of field names (e.g. "Alg") to // unconditionally include in API requests. By default, fields with // empty values are omitted from API requests. However, any non-pointer, // non-interface field appearing in ForceSendFields will be sent to the // server regardless of whether the field is empty or not. This may be // used to include empty fields in Patch requests. ForceSendFields []string `json:"-"` }
func (*JwkKeys) MarshalJSON ¶
type Raw ¶
type Raw struct { Keyvalues []*RawKeyvalues `json:"keyvalues,omitempty"` // ServerResponse contains the HTTP response code and headers from the // server. googleapi.ServerResponse `json:"-"` // ForceSendFields is a list of field names (e.g. "Keyvalues") to // unconditionally include in API requests. By default, fields with // empty values are omitted from API requests. However, any non-pointer, // non-interface field appearing in ForceSendFields will be sent to the // server regardless of whether the field is empty or not. This may be // used to include empty fields in Patch requests. ForceSendFields []string `json:"-"` }
func (*Raw) MarshalJSON ¶
type RawKeyvalues ¶
type RawKeyvalues struct { Algorithm string `json:"algorithm,omitempty"` Exponent string `json:"exponent,omitempty"` Keyid string `json:"keyid,omitempty"` Modulus string `json:"modulus,omitempty"` // ForceSendFields is a list of field names (e.g. "Algorithm") to // unconditionally include in API requests. By default, fields with // empty values are omitted from API requests. However, any non-pointer, // non-interface field appearing in ForceSendFields will be sent to the // server regardless of whether the field is empty or not. This may be // used to include empty fields in Patch requests. ForceSendFields []string `json:"-"` }
func (*RawKeyvalues) MarshalJSON ¶
func (s *RawKeyvalues) MarshalJSON() ([]byte, error)
type Service ¶
type Service struct { BasePath string // API endpoint base URL UserAgent string // optional additional User-Agent fragment Userinfo *UserinfoService // contains filtered or unexported fields }
func (*Service) GetCertForOpenIdConnect ¶
func (s *Service) GetCertForOpenIdConnect() *GetCertForOpenIdConnectCall
GetCertForOpenIdConnect:
func (*Service) GetCertForOpenIdConnectRaw ¶
func (s *Service) GetCertForOpenIdConnectRaw() *GetCertForOpenIdConnectRawCall
GetCertForOpenIdConnectRaw:
func (*Service) GetRobotJwk ¶
func (s *Service) GetRobotJwk(robotEmail string) *GetRobotJwkCall
GetRobotJwk:
func (*Service) GetRobotMetadataRaw ¶
func (s *Service) GetRobotMetadataRaw(robotEmail string) *GetRobotMetadataRawCall
GetRobotMetadataRaw:
func (*Service) GetRobotMetadataX509 ¶
func (s *Service) GetRobotMetadataX509(robotEmail string) *GetRobotMetadataX509Call
GetRobotMetadataX509:
type Tokeninfo ¶
type Tokeninfo struct { // AccessType: The access type granted with this token. It can be // offline or online. AccessType string `json:"access_type,omitempty"` // Audience: Who is the intended audience for this token. In general the // same as issued_to. Audience string `json:"audience,omitempty"` // Email: The email address of the user. Present only if the email scope // is present in the request. Email string `json:"email,omitempty"` // EmailVerified: Boolean flag which is true if the email address is // verified. Present only if the email scope is present in the request. EmailVerified bool `json:"email_verified,omitempty"` // ExpiresIn: The expiry time of the token, as number of seconds left // until expiry. ExpiresIn int64 `json:"expires_in,omitempty"` // IssuedAt: The issue time of the token, as number of seconds. IssuedAt int64 `json:"issued_at,omitempty"` // IssuedTo: To whom was the token issued to. In general the same as // audience. IssuedTo string `json:"issued_to,omitempty"` // Issuer: Who issued the token. Issuer string `json:"issuer,omitempty"` // Nonce: Nonce of the id token. Nonce string `json:"nonce,omitempty"` // Scope: The space separated list of scopes granted to this token. Scope string `json:"scope,omitempty"` // UserId: The obfuscated user id. UserId string `json:"user_id,omitempty"` // VerifiedEmail: Boolean flag which is true if the email address is // verified. Present only if the email scope is present in the request. VerifiedEmail bool `json:"verified_email,omitempty"` // ServerResponse contains the HTTP response code and headers from the // server. googleapi.ServerResponse `json:"-"` // ForceSendFields is a list of field names (e.g. "AccessType") to // unconditionally include in API requests. By default, fields with // empty values are omitted from API requests. However, any non-pointer, // non-interface field appearing in ForceSendFields will be sent to the // server regardless of whether the field is empty or not. This may be // used to include empty fields in Patch requests. ForceSendFields []string `json:"-"` }
func (*Tokeninfo) MarshalJSON ¶
type TokeninfoCall ¶
type TokeninfoCall struct {
// contains filtered or unexported fields
}
func (*TokeninfoCall) AccessToken ¶
func (c *TokeninfoCall) AccessToken(accessToken string) *TokeninfoCall
AccessToken sets the optional parameter "access_token": The oauth2 access token
func (*TokeninfoCall) Context ¶
func (c *TokeninfoCall) Context(ctx context.Context) *TokeninfoCall
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*TokeninfoCall) Do ¶
func (c *TokeninfoCall) Do(opts ...googleapi.CallOption) (*Tokeninfo, error)
Do executes the "oauth2.tokeninfo" call. Exactly one of *Tokeninfo or error will be non-nil. Any non-2xx status code is an error. Response headers are in either *Tokeninfo.ServerResponse.Header or (if a response was returned at all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified to check whether the returned error was because http.StatusNotModified was returned.
func (*TokeninfoCall) Fields ¶
func (c *TokeninfoCall) Fields(s ...googleapi.Field) *TokeninfoCall
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*TokeninfoCall) IdToken ¶
func (c *TokeninfoCall) IdToken(idToken string) *TokeninfoCall
IdToken sets the optional parameter "id_token": The ID token
type UserinfoGetCall ¶
type UserinfoGetCall struct {
// contains filtered or unexported fields
}
func (*UserinfoGetCall) Context ¶
func (c *UserinfoGetCall) Context(ctx context.Context) *UserinfoGetCall
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*UserinfoGetCall) Do ¶
func (c *UserinfoGetCall) Do(opts ...googleapi.CallOption) (*Userinfoplus, error)
Do executes the "oauth2.userinfo.get" call. Exactly one of *Userinfoplus or error will be non-nil. Any non-2xx status code is an error. Response headers are in either *Userinfoplus.ServerResponse.Header or (if a response was returned at all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified to check whether the returned error was because http.StatusNotModified was returned.
func (*UserinfoGetCall) Fields ¶
func (c *UserinfoGetCall) Fields(s ...googleapi.Field) *UserinfoGetCall
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*UserinfoGetCall) IfNoneMatch ¶
func (c *UserinfoGetCall) IfNoneMatch(entityTag string) *UserinfoGetCall
IfNoneMatch sets the optional parameter which makes the operation fail if the object's ETag matches the given value. This is useful for getting updates only after the object has changed since the last request. Use googleapi.IsNotModified to check whether the response error from Do is the result of In-None-Match.
type UserinfoService ¶
type UserinfoService struct { V2 *UserinfoV2Service // contains filtered or unexported fields }
func NewUserinfoService ¶
func NewUserinfoService(s *Service) *UserinfoService
type UserinfoV2MeGetCall ¶
type UserinfoV2MeGetCall struct {
// contains filtered or unexported fields
}
func (*UserinfoV2MeGetCall) Context ¶
func (c *UserinfoV2MeGetCall) Context(ctx context.Context) *UserinfoV2MeGetCall
Context sets the context to be used in this call's Do method. Any pending HTTP request will be aborted if the provided context is canceled.
func (*UserinfoV2MeGetCall) Do ¶
func (c *UserinfoV2MeGetCall) Do(opts ...googleapi.CallOption) (*Userinfoplus, error)
Do executes the "oauth2.userinfo.v2.me.get" call. Exactly one of *Userinfoplus or error will be non-nil. Any non-2xx status code is an error. Response headers are in either *Userinfoplus.ServerResponse.Header or (if a response was returned at all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified to check whether the returned error was because http.StatusNotModified was returned.
func (*UserinfoV2MeGetCall) Fields ¶
func (c *UserinfoV2MeGetCall) Fields(s ...googleapi.Field) *UserinfoV2MeGetCall
Fields allows partial responses to be retrieved. See https://developers.google.com/gdata/docs/2.0/basics#PartialResponse for more information.
func (*UserinfoV2MeGetCall) IfNoneMatch ¶
func (c *UserinfoV2MeGetCall) IfNoneMatch(entityTag string) *UserinfoV2MeGetCall
IfNoneMatch sets the optional parameter which makes the operation fail if the object's ETag matches the given value. This is useful for getting updates only after the object has changed since the last request. Use googleapi.IsNotModified to check whether the response error from Do is the result of In-None-Match.
type UserinfoV2MeService ¶
type UserinfoV2MeService struct {
// contains filtered or unexported fields
}
func NewUserinfoV2MeService ¶
func NewUserinfoV2MeService(s *Service) *UserinfoV2MeService
func (*UserinfoV2MeService) Get ¶
func (r *UserinfoV2MeService) Get() *UserinfoV2MeGetCall
Get: Get user info
type UserinfoV2Service ¶
type UserinfoV2Service struct { Me *UserinfoV2MeService // contains filtered or unexported fields }
func NewUserinfoV2Service ¶
func NewUserinfoV2Service(s *Service) *UserinfoV2Service
type Userinfoplus ¶
type Userinfoplus struct { // Email: The user's email address. Email string `json:"email,omitempty"` // FamilyName: The user's last name. FamilyName string `json:"family_name,omitempty"` // Gender: The user's gender. Gender string `json:"gender,omitempty"` // GivenName: The user's first name. GivenName string `json:"given_name,omitempty"` // Hd: The hosted domain e.g. example.com if the user is Google apps // user. Hd string `json:"hd,omitempty"` // Id: The obfuscated ID of the user. Id string `json:"id,omitempty"` // Link: URL of the profile page. Link string `json:"link,omitempty"` // Locale: The user's preferred locale. Locale string `json:"locale,omitempty"` // Name: The user's full name. Name string `json:"name,omitempty"` // Picture: URL of the user's picture image. Picture string `json:"picture,omitempty"` // VerifiedEmail: Boolean flag which is true if the email address is // verified. Always verified because we only return the user's primary // email address. // // Default: true VerifiedEmail *bool `json:"verified_email,omitempty"` // ServerResponse contains the HTTP response code and headers from the // server. googleapi.ServerResponse `json:"-"` // ForceSendFields is a list of field names (e.g. "Email") to // unconditionally include in API requests. By default, fields with // empty values are omitted from API requests. However, any non-pointer, // non-interface field appearing in ForceSendFields will be sent to the // server regardless of whether the field is empty or not. This may be // used to include empty fields in Patch requests. ForceSendFields []string `json:"-"` }
func (*Userinfoplus) MarshalJSON ¶
func (s *Userinfoplus) MarshalJSON() ([]byte, error)