Class: Embulk::Filter::GoogleVisionApi

Inherits:
FilterPlugin
  • Object
show all
Defined in:
lib/embulk/filter/google_vision_api.rb

Constant Summary collapse

ENDPOINT_PREFIX = 
"https://vision.googleapis.com/v1/images:annotate"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.transaction(config, in_schema) {|task, out_columns| ... } ⇒ Object

Yields:

  • (task, out_columns) 


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# File 'lib/embulk/filter/google_vision_api.rb', line 15

def self.transaction(config, in_schema, &control)
  task = {
    "out_key_name" => config.param("out_key_name", :string),
    "image_path_key_name" => config.param("image_path_key_name", :string),
    "features" => config.param("features", :array),
    "delay" => config.param("delay", :integer, default: 0),
    "image_num_per_request" => config.param("image_num_per_request", :integer, default: 16),
    "google_api_key" => config.param("google_api_key", :string, default: ENV['GOOGLE_API_KEY']),
  }

  add_columns = [
    Column.new(nil, task["out_key_name"], :json)
  ]

  out_columns = in_schema + add_columns

  yield(task, out_columns)
end

Instance Method Details

#add(page) ⇒ Object 



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# File 'lib/embulk/filter/google_vision_api.rb', line 50

def add(page)
  record_groups = page.map { |record|
    Hash[in_schema.names.zip(record)]
  }.each_slice(@image_num_per_request).to_a

  record_groups.each do |records|
    requests = []
    records.each do |record|
      request = {
        image: {},
        features: @features
      }
      image_body = get_image_body(record)
      request[:image][:content] = Base64.encode64(image_body)
      requests << request
    end
    body = {
      requests: requests
    }
    @post.body = body.to_json
    Embulk.logger.debug "request body => #{@post.body}"

    response_hash = {}
    @http.start do |h|
      response = h.request(@post)
      response_hash = JSON.parse(response.body)
    end
    records.each_with_index do |record, i|
      recognized = response_hash['responses'][i]
      Embulk.logger.warn "Error image => [#{record[@image_path_key_name]}] #{recognized}" if recognized.key?("error")
      page_builder.add(record.values + [recognized])
    end

    sleep @delay
  end
end

#close ⇒ Object 



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# File 'lib/embulk/filter/google_vision_api.rb', line 47

def close
end

#finish ⇒ Object 



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# File 'lib/embulk/filter/google_vision_api.rb', line 87

def finish
  page_builder.finish
end

#init ⇒ Object 



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# File 'lib/embulk/filter/google_vision_api.rb', line 34

def init
  @uri = URI.parse("#{ENDPOINT_PREFIX}?key=#{task['google_api_key']}")
  @http = Net::HTTP.new(@uri.host, @uri.port)
  @http.use_ssl = true
  @http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  @post = Net::HTTP::Post.new(@uri.request_uri, initheader = {'Content-Type' =>'application/json'})
  @image_path_key_name = task['image_path_key_name']
  @out_key_name = task['out_key_name']
  @delay = task['delay']
  @image_num_per_request = task['image_num_per_request']
  @features = task['features']
end