issues with latest Grape API - is this project still maintained?

[bluegod]

Hi,

Similar to the example, I have setup rack-stream requiring the lib and adding "use Rack::Stream" to my config.ru. I'm using rackup but I have some issues getting the DSL methods to work:

class:API': undefined method `after_open' for #Grape::Endpoint:0x0000010142b218 (NoMethodError)

Ans using stream:

class:API': undefined method `stream' for #Grape::Endpoint:0x000001022bfe78 (NoMethodError)

Any idea whether I'm missing something here ?

In my API class I do something like:

class API < Grape::API
format :json
prefix 'api'
version 'v1'
include Rack::Stream::DSL
resource :messages do
  post do
    #does stuff
  end

  get do
      after_open do
        chunk my_data_method
      end
      status 200
      header 'Content-Type', 'application/json'
      chunk 'bye!'
      ""
      end
  end
end

[croeck]

I think you need to include the Rack::Stream::DSL within a helpers block.
The following snippet is taken from one of the examples:

helpers do
    include Rack::Stream::DSL
end

[bluegod]

Thanks - Actually my app changed a bit and I'm calling a @data.get_stuff method inside the "get do". Data is an object that handles the SQL bit and the long polling waiting. I have tried to include or extend the module Rack::Stream::DSL from this other class Data, but still have no success in finding the DSL methods there ?

[bluegod]

Ok I made some progress. I managed to pass the env to the method in the other class as a parameter and I can call env['rack.stream'].chunk or env['rack.stream'].close directly from there.

A small issue I have now is when calling:

env['rack.stream'].chunk 'nothing to say'

In the actual body response the content is something like
<Rack::App...>nothing to say

Returning "" at the end of the get do method the response body is set to:
""nothing to say, which is still not ideal. Any idea how to avoid returning anything from there?

Another question I have is, do I have to set status/headers as in the example? Previously Grape would handle this for you.

[bluegod]

Another update on this. I managed to get it working. I realised in the example the default_format in Grape is set to :txt, but then manually set to json using the headers. That worked, as using text seems to merge that final "" while in JSON it expects a JSON object and returning back something like {} will get merged into an array in the body.

Anyway, I do see this as a workaround and perhaps a better solution would be to somehow override the Grape method that process the body - possibly not easy to do.