Migration script from http://posterous.com/ to github pages, forked from https://github.com/AlexeyMK/alexeymk.github.com/blob/master/posterous_import.rb with a monkey patch on Posterous Connection.

posterous.rb

require 'rubygems'
require 'jekyll'
require 'fileutils'
require 'posterous'
require 'net/http'
require 'URI'

puts ARGV, "IS ARGV"

module Posterous
  module Connection
    def default_options
  @default_options ||= { 
    #:username => Posterous.config['username'], 
    #:password => Posterous.config['password']
    :userpwd => Posterous.config['username']+":"+Posterous.config['password']
  }
end
  end
end

Posterous.config = {
  'username'  => ARGV[0],
  'password'  => ARGV[1],  
  'api_token' => ARGV[2]  # https://posterous.com/api
}

include Posterous

puts "all set"

FileUtils.mkdir_p "_posts"
FileUtils.mkdir_p "images"

site = Site.primary
page = 1
posts = site.posts(:page => page)

puts "made it so far"

def download_image(u)
  path = 'images/%s' % u.split('/')[-1]
  url = URI.parse(u)
  found = false
  until found
    host, port = url.host, url.port if url.host && url.port
    query = url.query ? url.query : ""
    req = Net::HTTP::Get.new(url.path + '?' + query)
    res = Net::HTTP.start(host, port) {|http|  http.request(req) }
    res.header['location'] ? url = URI.parse(res.header['location']) : found = true
  end
  open(path, "wb") do |file|
    file.write(res.body)
  end
  path
end

while posts.any?
  posts.each do |post|
    sleep 1 # second
    puts post.title
    slug = post.slug.gsub('/', '-')
    date = DateTime.parse(post.display_date)
    published = !post.is_private
    name = "%02d-%02d-%02d-%s.html" % [date.year, date.month, date.day, slug]

    tags = post.tags.map do |t|
      t['name']
    end

    perm = URI::parse(post.full_url)

    # Get the relevant fields as a hash, delete empty fields and convert
    # to YAML for the header
    data = {
      'permalink' => perm.path + "/index.html",
      'layout' => 'post',
      'title' => post.title.to_s,
      'published' => published,
      'date' => 'QUOTEHACK%02d-%02d-%02d %02d:%02d:%02d' % [date.year, date.month, date.day, date.hour, date.minute, date.second],
      'tags' => tags,
    }.delete_if { |k,v| v.nil? || v == ''}.to_yaml

    # force YAML to not wrap strings around the date.
    data.gsub!("QUOTEHACK", "")

    content = post.body_html

    # awefull hack, do not use on vlog or podcast
    # may not have any images
    post.media['images'].each do |img|
      path = download_image(img['full']['url'])
      tag = "<img src=\"/%s\" alt=\"%s\" />" % [path, img['full']['caption']]
      puts tag
      begin
        content[/\[\[posterous-content:[^\]]*\]\]/] = tag
      rescue IndexError
        puts "weird stuff happening"
      end
    end

    # Write out the data and content to file
    File.open("_posts/#{name}", "w") do |f|
      f.puts data
      f.puts "---"
      f.puts content
    end
  end

  page += 1
  posts = site.posts(:page => page)
end