[Proposal]Using uniform function signatures

[tpiperatgod]

Motivation

Currently, functions-framework-go needs to handle three different functions:

• http function func(http.ResponseWriter, *http.Request)
• cloudevent function func(context.Context, cloudevents.Event) error
• openfunction functions-framework spec based function func(*ofctx.OpenFunctionContext, []byte) ofctx.RetValue

This is not user-friendly and is not conducive to maintenance and evolution.

Main goal

Use functions(unified function signatures) based on the openfunction functions-framework specification to support different functions.

[benjaminhuo]

Agree

[benjaminhuo]

Close via https://github.com/OpenFunction/functions-framework-go/pull/22