get_corporation_logo_job.rb

require 'net/http'
require 'RMagick'
# Retrieves a corporation logo for a corporation
class GetCorporationLogoJob < Struct.new(:corporation_id)
  def perform
    File.open("#{RAILS_ROOT}/public/system/corporations/#{corporation_id.to_i}_64.png","wb") do |f|
      Net::HTTP.start("clg.eve-metrics.com") do |http| 
        resp = http.get("/#{corporation_id.to_i.to_s}.png")
        return unless resp
        if resp.response['Location'] then
          unless resp.response['Location'].include?"not_in_alliance.png"
            url = URI.parse(resp.response['Location'])
            res2 = Net::HTTP.start(url.host, url.port) {|http2|
              f << http2.get(url.path).body
            }
          end
        end
      end
    end
    # Now use RMagick to bake some 16/32 images.
    img = Magick::Image::read("#{RAILS_ROOT}/public/system/corporations/#{corporation_id.to_i}_64.png")[0]
    if File.exists?("#{RAILS_ROOT}/public/system/corporations/#{corporation_id.to_i}_64.png") and img != nil
      img.scale(32,32).write("#{RAILS_ROOT}/public/system/corporations/#{corporation_id.to_i}_32.png")
      img.scale(16,16).write("#{RAILS_ROOT}/public/system/corporations/#{corporation_id.to_i}_16.png")
      c = Corporation.find(corporation_id) # Mark as having got logo successfully
      c.logo_fetched_at = Time.now
      c.got_logo = true
      c.save
    else
      c = Corporation.find(corporation_id) # Mark as having failed; will retry in a few days
      c.logo_fetched_at = Time.now
      c.save
    end
  end
  def errors
  end
end