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README.md

Go SDK for CloudEvents

go-doc Go Report Card CircleCI Releases LICENSE

Official CloudEvents SDK to integrate your application with CloudEvents.

This library will help you to:

Note: Supported CloudEvents specification: 0.3, 1.0

Note: Supported go version: 1.14+

Get started

Add the module as dependency using go mod:

% go get github.com/cloudevents/sdk-go/v2@v2.3.1

And import the module in your code

import cloudevents "github.com/cloudevents/sdk-go/v2"

Send your first CloudEvent

To send a CloudEvent using HTTP:

func main() {
	// The default client is HTTP.
	c, err := cloudevents.NewDefaultClient()
	if err != nil {
		log.Fatalf("failed to create client, %v", err)
	}

	// Create an Event.
	event :=  cloudevents.NewEvent()
	event.SetSource("example/uri")
	event.SetType("example.type")
	event.SetData(cloudevents.ApplicationJSON, map[string]string{"hello": "world"})

	// Set a target.
	ctx := cloudevents.ContextWithTarget(context.Background(), "http://localhost:8080/")

	// Send that Event.
	if result := c.Send(ctx, event); cloudevents.IsUndelivered(result) {
		log.Fatalf("failed to send, %v", result)
	}
}

Receive your first CloudEvent

To start receiving CloudEvents using HTTP:

func receive(event cloudevents.Event) {
	// do something with event.
    fmt.Printf("%s", event)
}

func main() {
	// The default client is HTTP.
	c, err := cloudevents.NewDefaultClient()
	if err != nil {
		log.Fatalf("failed to create client, %v", err)
	}
	log.Fatal(c.StartReceiver(context.Background(), receive));
}

Serialize/Deserialize a CloudEvent

To marshal a CloudEvent into JSON:

event := cloudevents.NewEvent()
event.SetSource("example/uri")
event.SetType("example.type")
event.SetData(cloudevents.ApplicationJSON, map[string]string{"hello": "world"})

bytes, err := json.Marshal(event)

To unmarshal JSON back into a CloudEvent:

event :=  cloudevents.NewEvent()

err := json.Unmarshal(bytes, &event)

Go further

Community

Each SDK may have its own unique processes, tooling and guidelines, common governance related material can be found in the CloudEvents community directory. In particular, in there you will find information concerning how SDK projects are managed, guidelines for how PR reviews and approval, and our Code of Conduct information.

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