openfunction

Forwards the request to an OpenFunction endpoint and returns the function's status, headers, and body as the gateway response. It replaces the upstream: place it where an upstream node would go and wire its success port straight to client.in.

Configuration

Key	Type	Default	Description
`function_uri`	string	required	OpenFunction URL to invoke.
`authorization`	object	—	Optional service-token credential (see below).
`authorization.service_token`	string	—	Sent as `Authorization: Basic <base64(service_token)>`.
`ssl_verify`	bool	`true`	Verify TLS certificates on the callout.
`timeout`	integer (ms)	`3000`	Whole-call deadline (connect + request + response body).

type: openfunction
config:
  function_uri: http://openfunction.svc/default/hello
  authorization:
    service_token: ${OPENFUNCTION_TOKEN}
  ssl_verify: true
  timeout: 3000

Config load fails if function_uri is missing or empty.

Behavior

The plugin forwards the client's method, headers, query string, and body to function_uri, overriding Host with the endpoint's authority. When authorization.service_token is set, an Authorization: Basic <base64(service_token)> header is added (replacing any client-supplied Authorization). On success it populates context.response with the function's status, headers, and body and exits through the success port — which should be wired to client.in, since this node stands in for the upstream. The function's status is passed through as-is.

A callout failure returns the Context along with an error so the graph engine routes through the error port; the error is appended to context.errors:

Code	Status	When
`OPENFUNCTION_CALLOUT_ERROR`	504	The callout exceeded `timeout`.
`OPENFUNCTION_CALLOUT_ERROR`	503	Connecting to or exchanging with the endpoint failed.
`OPENFUNCTION_CALLOUT_ERROR`	502	The request could not be built (e.g. invalid `function_uri`).

The plugin does not read or write context.message.

Configuration​

Behavior​

Configuration

Behavior