Simple Ruby script to download images from a Flickr group.

flickr_downloader.rb

require 'flickraw'

# get your flickr api key here: http://www.flickr.com/services/apps/create/apply
API_KEY = "PUT YOURS HERE"
SECRET = "PUT YOURS HERE"
ACCESS_TOKEN = "PUT YOURS HERE"
ACCESS_SECRET = "PUT YOURS HERE"

gid = "ID of group to download from" # i.e. "16978849@N00" is the blackandwhite group

FlickRaw.api_key = API_KEY
FlickRaw.shared_secret = SECRET

flickr.access_token = ACCESS_TOKEN
flickr.access_secret = ACCESS_SECRET

login = flickr.test.login

def get_page(page, gid)
  puts "requesting page: #{page}"

  photos = flickr.groups.pools.getPhotos(:group_id => gid, :per_page => 500, :page => page)
  
  photos.each_with_index do |photo, i|
    puts "downloading #{i + 1}/#{photos.length}"
    begin
      sizes = flickr.photos.getSizes(:photo_id => photo["id"])
      original = sizes.select{|s| s["label"] == "Original"}.first
      `cd images; wget #{original["source"]}`
    rescue Exception => e
      open("log.txt", "a"){|f| f << "FAIL: photoid: #{photo["id"]}\terror: #{e}\n"}
    end
  end
  
  if photos.length == 500
    get_page( page + 1 )
  end

end

get_page(1, gid)