Event format

Eventarc delivers events, regardless of provider, to the target destination in a CloudEvents ( cloudevents.io ) format in binary content mode.

CloudEvents is the Cloud Native Computing Foundation's open standard specification for describing event metadata in a common way. Using a standard way to describe event metadata ensures consistency, accessibility, and portability.

A CloudEvent in binary content mode has its context attributes described as HTTP headers. The names of the HTTP headers are the context attribute names prefixed with ce- . The Content-Type header reflects the media type in which the event data is encoded.

Target destinations consume events using an HTTP protocol binding .

For Workflows destinations, the Workflows service converts the event to a JSON object , and passes the event into the workflow execution as a runtime argument.