引数で指定したユーザの twitpic のメタデータと画像を ./twitpic に保存

backup-twitpic.rb

#!/usr/bin/env ruby
gem "rest-client", "~> 1.6.6"
require "rest-client"
require "json"
require "time"

unless username = ARGV.first
  STDERR.puts "Usage: backup-twitpic username"
  exit 1
end

Dir.mkdir("twitpic") unless Dir.exists?("twitpic")
Dir.chdir("twitpic") do
  user_json = RestClient.get("http://api.twitpic.com/2/users/show.json?username=#{username}")
  File.write("user.json", user_json)

  user = JSON.parse(user_json)
  user["images"].each do |i|
    timestamp = Time.parse(i["timestamp"]).strftime("%Y%m%d%H%M%S")
    message_escaped = i["message"].gsub("/", "_")
    filename = "#{timestamp}-#{i["short_id"]}-#{message_escaped}.#{i["type"]}"
    url = "http://twitpic.com/show/full/#{i["short_id"]}"
    STDERR.puts "Download #{url}"
    File.write(filename, RestClient.get(url))
    sleep 1
  end
end