RequestBuilder

request_builder.rb

module RequestBuilder
  DEBUG = false
  require 'net/http'
  require 'json'
  require 'uri'
  require 'mime-types'
  require 'openssl'
  require 'response_handler'
  #uri_string - URI
  #req_type - Post/Put/Get/Delete etc
  #headers - Hash of headers
  #returns response
  def self.do_request(uri_string, req_type, headers, body)
   req = build_request(uri_string, req_type, headers, body)
   i = 0
   begin
    make_request(URI(uri_string), req)
   rescue SocketError
     i += 1
     retry if i<2
     raise SocketError
   end
  end

  require 'net/http/post/multipart'

  def self.do_post_form_request(uri_string, form_fields_hash, token=nil)
    file_name = File.basename(form_fields_hash['file'].path)
    form_fields_hash['file'] = UploadIO.new(form_fields_hash['file'], MIME::Types.type_for(file_name).first.content_type, file_name)
    url = URI.parse(uri_string)
    req = Net::HTTP::Post::Multipart.new url.path, form_fields_hash
    req.add_field("Token", token) if token
    res = Net::HTTP.start(url.host, url.port, {:use_ssl => url.port == 443}) do |http|
      http.request(req)
    end
    return res
  end

  private


  # We need to define place where we will modify body to json/xml
  #for now here body already modified
  def self.build_request(uri_string, req_type, headers, body)
    req = "Net::HTTP::#{req_type}".constantize.new(uri_string)
    headers = {"REST-API-Version" => "0.1.0"}.update(headers)
    headers.each_pair {|head,value| req.add_field(head, value)}
    req.body = body if body
    return req
  end

  #retry mechanism is needed
  # this is a simplest retry mechanism
  def self.make_request(uri, req, retry_request=true)
    Rails.logger.debug("URI: #{uri.inspect}")
    Rails.logger.debug("REQ: #{req.body.inspect}")
      response = Net::HTTP.start(uri.host, uri.port, {:use_ssl => uri.port == 443}) do |http|
        http.request(req) #returns a response
      end
    Rails.logger.debug("RESPONSE: #{response.body}")
    ResponseHandler.check_status(response)
    return response
  end

end