Cloud Functions - Package cloud.google.com/go/functions/metadata (v0.77.0)

Version 0.77.0

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Alpha

This library is covered by the Pre-GA Offerings Terms of the Terms of Service. Pre-GA libraries might have limited support, and changes to pre-GA libraries might not be compatible with other pre-GA versions. For more information, see the launch stage descriptions.

Note: To get more information about this package, such as access to older versions, view this package on pkg.go.dev.

Package metadata provides methods for creating and accessing context.Context objects with Google Cloud Functions metadata.

NOTE: This package is in alpha. It is not stable, and is likely to change.

Functions

func NewContext

func NewContext(ctx context.Context, m *Metadata) context.Context

NewContext returns a new Context carrying m. If m is nil, NewContext returns ctx. NewContext is only used for writing tests which rely on Metadata.

Metadata

type Metadata struct {
	// EventID is a unique ID for the event. For example: "70172329041928".
	EventID string `json:"eventId"`
	// Timestamp is the date/time this event was created.
	Timestamp time.Time `json:"timestamp"`
	// EventType is the type of the event. For example: "google.pubsub.topic.publish".
	EventType string `json:"eventType"`
	// Resource is the resource that triggered the event.
	Resource *Resource `json:"resource"`
}

Metadata holds Google Cloud Functions metadata.

func FromContext

func FromContext(ctx context.Context) (*Metadata, error)

FromContext extracts the Metadata from the Context, if present.

Resource

type Resource struct {
	// Service is the service that triggered the event.
	Service string `json:"service"`
	// Name is the name associated with the event.
	Name string `json:"name"`
	// Type is the type of event.
	Type string `json:"type"`
	// Path is the path to the resource type (deprecated).
	// This is the case for some deprecated GCS
	// notifications, which populate the resource field as a string containing the topic
	// rather than as the expected dictionary.
	// See the Attributes section of https://cloud.google.com/storage/docs/pubsub-notifications
	// for more details.
	RawPath string `json:"-"`
}

Resource holds Google Cloud Functions resource metadata. Resource values are dependent on the event type they're from.

func (*Resource) MarshalJSON

func (r *Resource) MarshalJSON() ([]byte, error)

MarshalJSON specializes the Resource marshalling to handle the case where the value is a string instead of a map. See the comment above on RawPath for why this needs to be handled.

func (*Resource) UnmarshalJSON

func (r *Resource) UnmarshalJSON(data []byte) error

UnmarshalJSON specializes the Resource unmarshalling to handle the case where the value is a string instead of a map. See the comment above on RawPath for why this needs to be handled.