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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
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
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
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
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.