Import Markdown posts from Posterous into Jeykll

Gemfile

source :rubygems

gem 'rest-client'
gem 'nokogiri'

posterous2jeykll.rb

require 'rest-client'
require 'json'
require 'date'
require 'nokogiri'
require 'yaml'
require 'uri'
require 'fileutils'

# Copy the value from your browser's session cookie here 
SESSION_ID = ''

options = {
  cookies: { '_sharebymail_session_id' => SESSION_ID }
}

sites   = JSON.parse(RestClient.get('http://posterous.com/api/2/sites', options))
site_id = sites[0]['id']

response = RestClient.get("https://posterous.com/api/2/sites/#{site_id}/posts", options)

File.open('posterous-posts.json', 'w') {|f| f.write(response) }

posts = JSON.parse(response)

posts.each do |post|
  post_id    = post['id']
  post_slug  = post['slug']
  post_title = post['title']
  post_date  = Date.parse(post['display_date'])

  body_text  = post['body_html']

  extension = 'html'

  puts "Importing #{post_id}: #{post_title}"

  # Check to see if this is markdown
  response = RestClient.get "http://posterous.com/posts/edit/#{post_id}", options
  doc = Nokogiri::HTML(response)
  original_body_text = doc.css('#editor_main #post_body').text
  original_body = Nokogiri::HTML(original_body_text)

  if original_body.css('markdown').any?
    extension = 'markdown'
    body_text = original_body.css('markdown').text
  end

  header = {
    'layout' => 'post',
    'title'  => post_title,
    'date'   => post_date.strftime('%b %d, %Y'),
    'redirects' => [
      URI.parse(post['full_url']).path
    ]
  }

  lines = []
  lines << header.to_yaml.strip
  lines << '---'
  lines << ''
  lines << body_text

  unless post['is_private']
    filename = "_posts/#{post_date.strftime('%Y-%m-%d')}-#{post_slug}.#{extension}"
  else
    filename = "_posts_private/#{post_date.strftime('%Y-%m-%d')}-#{post_slug}.#{extension}"
  end

  FileUtils.mkdir_p(File.dirname(filename))

  File.open(filename, 'w') { |f| f.write(lines.join("\n")) }
end