Considering approaches of laying out code and handling callbacks. Which one would you pick? getData1, getData2 or getData3?... Or some other method?

test.coffee

request = require 'request'

class Test
  _processData: (details, callback, error, response, body) =>
    if error?
      return callback error
    if reponse.statusCode isnt 200
      return callback(new Error(response.statusCode))
    try
      callback null, {data: JSON.parse(body), details: details}
    catch error
      callback error

  getData1: (details, callback) =>
    request details.url, @_processData.bind(@, details, callback)

  # ----- OR ------
  
  getData2: (details, callback) =>
    request details.url, (error, response, body) =>
      @_processData(details, callback, error, response, body)

  # ----- OR -----

  getData3: (details, callback) =>
    request details.url, (error, response, body) =>
      if error?
        return callback error
      if reponse.statusCode isnt 200
        return callback(new Error(response.statusCode))
      try
        callback null, {data: JSON.parse(body), details: details}
      catch error
        callback error