Plugin Response phase - how to set response body?

Kong 2.2.0 introduces a new response phase that according to the changelog allows to manipulate both the response headers and the response body in the same phase.

However, while kong.service.response.get_raw_body() and kong.service.response.get_body() are supported in this phase, there is no kong.response.set_raw_body() nor kong.response.set_body().

How can the response body be manipulated in the response phase?

Thanks

If you look at Kong’s source for response.lua, you’ll see that they’ve, well, considered the PDK function.

For body_filter plugins historically, you would set the response body by setting ngx.arg[1] to the body bytes you wanted to send, typically when ngx.arg[2] was not nil (body_filter plugin phases being called potentially multiple times). Have you tried doing the same for a response phase plugin?

Yes, I tried. But ngx.arg is only available in the set_by_lua and body_filter_by_lua phases.
The error I received is API disabled in the context of access_by_lua*

Worth a shot. My company’s custom plugins haven’t explored the response phase yet, so someone from Kong will have to respond here.

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