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Sample Script of AWS Ruby Api

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Introduction

Some ruby script working on AWS api.
I will integrate them with Imgur’s ruby script to build a backend of gif sharing system later :)

Source Code

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#!/usr/bin/env ruby
# encoding: utf-8

require 'AWS'
require 'active_support/all'
require './StringColorize.rb'

GIF_TYPE_DEFAULT = 'GIF_TYPE_DEFAULT'
GIF_TYPE_ANIMAL = 'GIF_TYPE_ANIMAL'
GIF_TYPE_DOG = 'GIF_TYPE_DOG'

IMAGE_INFO_DOMAIN_NAME = "IMAGE_INFO_DOMAIN_NAME"
GROUP_INFO_DOMAIN_NAME = "GROUP_INFO_DOMAIN_NAME"

class AWSUtils

  ACCESS_KEY_ID = 'MY_ACCESS_KEY_ID'
  SECRET_ACCESS_KEY = 'MY_SECRET_ACCESS_KEY'

  def initialize
    self.prepareSDB
    self.prepareDomainSDB(IMAGE_INFO_DOMAIN_NAME)
    self.prepareDomainSDB(GROUP_INFO_DOMAIN_NAME)
  end

  def listImageInfos
    imageDomain = getDomain(IMAGE_INFO_DOMAIN_NAME)
    list_item_by_domain_name(imageDomain) do |item|
      list_attributes_by_item(item)
    end
  end

  def listGroupInfos
    groupDomain = getDomain(GROUP_INFO_DOMAIN_NAME)
    list_item_by_domain_name(groupDomain) do |item|
      list_attributes_by_item(item)
    end
  end

  def regions()
    AWS::regions.each do |region|
      puts region.name
    end
  end

  def prepareSDB()
    if @sdb.nil?
      puts "===> prepare sdb"
      @sdb = AWS::SimpleDB.new(
        :access_key_id => ACCESS_KEY_ID,
        :secret_access_key => SECRET_ACCESS_KEY,
        :region => 'ap-northeast-1')
    end
  end

  def prepareDomainSDB(domain_name)
    self.prepareSDB
    puts "===> initialize domain " + domain_name
    @sdb.domains.create(domain_name)
  end

  def getDomain(domain_name)
    self.prepareSDB
    @sdb.domains[domain_name]
  end

  # ==== Deletion ====

  def deleteEmptyDomain(domain)
    self.prepareSDB
    begin
      puts domain.name + " is deleted because empty"
      domain.delete
    rescue => ex
      puts domain.name + " delete error -> " + ex.to_s
    end
  end

  # ==== List ====

  def listDomainSDB(&block)
    self.prepareSDB
    @sdb.domains.each do |domain|
        puts "===> listing domain: " + domain.name
        unless block.nil?
          yield domain
        end
    end
  end

  def list_item_by_domain_name(domain, &block)
    self.prepareSDB
    #domain = @sdb.domains.create(domain_name)
#    puts domain.items.collect(&:name) # list name
    domain.items.each do |item|
      puts "===> listing item: " + item.name
      unless block.nil?
        yield item
      end
    end
  end

  def list_attributes_by_item(item)
    puts "===> listing attributes: " + item.attributes.to_h().to_s()
  end

  # ==== Insert ====
  #
  # item key -> image's md5
  #
  # followed by a hash contains
  #
  # upload_time -> ISO 8601 formatted time stamp
  # title -> [title_en, title_ja, ...]
  # type -> type string (Dog, Cat etc.)
  # group -> [group id 1, group id 2, ...], may be nil
  # link -> an Imgur link
  # json -> response of uploaded image
  # comment -> [], may be nil
  def insert_image_info_item(title, type, md5, link, json)
    self.prepareSDB
    image_domain = self.getDomain(IMAGE_INFO_DOMAIN_NAME)
    hash = {
      :upload_time => time2ISO8601,
      :title => [title],
      :type => [type],
      :group => [],
      :link => link,
      :json => json,
      :comment => [],
    }
    puts "===> inserting: #{md5} , #{hash}"
    image_domain.items.create(md5, hash)
    puts "===> ok"
  end

  # item key -> group id, this is auto-generated
  #
  # followed by a hash contains
  #
  # upload_time -> ISO 8601 formatted time stamp
  # title -> [title_en, title_ja, ...]
  # images_md5 -> [md5_1, md5_2, ...]
  # type -> type string (Dog, Cat etc.)
  # comment -> [], may be nil
  def insert_group_info_item(title, images_md5, type)
    self.prepareSDB
    group_domian = self.getDomain(GROUP_INFO_DOMAIN_NAME)
    uniq_id = (0...8).map { (65 + rand(26)).chr }.join
    hash = {
      :upload_time => time2ISO8601,
      :title => [title],
      :images_md5 => images_md5,
      :type => type,
      :comment => []
    }
    puts "===> inserting: #{uniq_id} , #{hash}"
    group_domian.items.create(uniq_id, hash)
  end

  def duplicated(domain, key)
    !domain.items[key].attributes.to_h.empty?
  end

  def duplicated_in_domain_name(domain_name, key)
    duplicated(getDomain(domain_name), key)
  end

  def time2ISO8601
    Time.now.in_time_zone('Asia/Tokyo').iso8601
  end

end

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