4chan download images from a single thread usage ruby 4chan.rb board OP# example ruby 4chan.rb s4s 816878

4chan.rb

#!/usr/bin/ruby
# 4chan downloader (images only)

require 'rubygems'
require 'json'
require 'open-uri'

def get_images(board, post)
  
  @board = board
  @post = post
  #@board = "b"
  #@post = "449783501"
  thread = JSON.parse(open("http://api.4chan.org/#{@board}/res/#{@post}.json").read)

  thread["posts"].each do |post|
    unless post["filename"] == nil
      #p post["tim"]
      #p post["ext"]
      directory = @board + "/" + @post
      Dir.mkdir(@board) unless File.directory?(@board)
      Dir.mkdir(directory) unless File.directory?(directory)
    
      filename = post["tim"].to_s + post["ext"]
      url = "http://images.4chan.org/#{@board}/src/#{filename}"
      p filename
      p url
      unless File.exist?(directory+"/"+filename)
        File.open(directory+"/"+filename, 'wb') do |fo|
          fo.write open(url).read 
        end
      end
    end
  end
  
end

if __FILE__ == $0
  
  board = ARGV[0]
  post = ARGV[1]
  get_images board, post
  
end