Added support for rewriting Tumblr URLs to Jekyll URLs in posts, meta redirects for Github pages, and automatic addition of Pygments highlight tags.
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Stephen McDonald
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@ -3,23 +3,46 @@ require 'open-uri'
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require 'fileutils'
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require 'date'
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require 'json'
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require 'uri'
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require 'jekyll'
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module Jekyll
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module Tumblr
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def self.process(url, grab_images = false, format = "html")
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current_page = 0
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while true
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f = open(url + "/api/read/json/?num=50&start=#{current_page * 50}")
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# [21...-2] strips Tumblr's Javascript/JSONP start/end chars
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json = f.readlines.join("\n")[21...-2]
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def self.process(url, format = "html", grab_images = false,
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add_highlights = false, rewrite_urls = true)
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FileUtils.mkdir_p "_posts/tumblr"
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url += "/api/read/json/"
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per_page = 50
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posts = []
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# Two passes are required so that we can rewrite URLs.
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# First pass builds up an array of each post as a hash.
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begin
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current_page = (current_page || -1) + 1
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feed = open(url + "?num=#{per_page}&start=#{current_page * per_page}")
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json = feed.readlines.join("\n")[21...-2] # Strip Tumblr's JSONP chars.
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blog = JSON.parse(json)
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puts "Page: #{current_page + 1} - Posts: #{blog["posts"].size}"
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FileUtils.mkdir_p "_posts/tumblr"
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posts += blog["posts"].map { |post| post_to_hash(post, format) }
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end until blog["posts"].size < per_page
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# Rewrite URLs and create redirects.
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posts = rewrite_urls_and_redirects posts if rewrite_urls
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# Second pass for writing post files.
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posts.each do |post|
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if format == "md"
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post[:content] = html_to_markdown post[:content]
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post[:content] = add_syntax_highlights post[:content] if add_highlights
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end
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File.open("_posts/tumblr/#{post[:name]}", "w") do |f|
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f.puts post[:header].to_yaml + "---\n" + post[:content]
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end
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end
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end
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blog["posts"].each do |post|
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private
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# Converts each type of Tumblr post to a hash with all required
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# data for Jekyll.
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def self.post_to_hash(post, format)
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case post['type']
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when "regular"
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title = post["regular-title"]
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@ -27,11 +50,15 @@ module Jekyll
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when "link"
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title = post["link-text"] || post["link-url"]
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content = "<a href=\"#{post["link-url"]}\">#{title}</a>"
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content << "<br/>" + post["link-description"] unless post["link-description"].nil?
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unless post["link-description"].nil?
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content << "<br/>" + post["link-description"]
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end
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when "photo"
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title = post["photo-caption"]
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content = "<img src=\"#{save_file(post["photo-url"], grab_images)}\"/>"
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content = "<a href=\"#{post["photo-link-url"]}\">#{content}</a>" unless post["photo-link-url"].nil?
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unless post["photo-link-url"].nil?
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content = "<a href=\"#{post["photo-link-url"]}\">#{content}</a>"
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end
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when "audio"
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if !post["id3-title"].nil?
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title = post["id3-title"]
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@ -43,7 +70,9 @@ module Jekyll
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when "quote"
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title = post["quote-text"]
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content = "<blockquote>#{post["quote-text"]}</blockquote>"
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content << "—" + post["quote-source"] unless post["quote-source"].nil?
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unless post["quote-source"].nil?
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content << "—" + post["quote-source"]
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end
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when "conversation"
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title = post["conversation-title"]
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content = "<section><dialog>"
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@ -54,42 +83,99 @@ module Jekyll
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when "video"
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title = post["video-title"]
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content = post["video-player"]
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content << "<br/>" + post["video-caption"] unless post["video-caption"].nil?
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end # End post types
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unless post["video-caption"].nil?
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content << "<br/>" + post["video-caption"]
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end
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end
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date = Date.parse(post['date']).to_s
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slug = title.downcase.strip.gsub(' ', '-').gsub(/[^\w-]/, '')
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{
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:name => "#{date}-#{slug}.#{format}",
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:header => {
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"layout" => "post",
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"title" => title,
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"tags" => post["tags"],
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},
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:content => content,
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:url => post["url"],
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:slug => post["url-with-slug"],
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}
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end
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name = "#{Date.parse(post['date']).to_s}-#{title.downcase.strip.gsub(' ', '-').gsub(/[^\w-]/, '')}.#{format}"
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# Create a Hash of old urls => new urls, for rewriting and
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# redirects, and replace urls in each post. Instantiate Jekyll
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# site/posts to get the correct permalink format.
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def self.rewrite_urls_and_redirects(posts)
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site = Jekyll::Site.new(Jekyll.configuration({}))
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dir = File.join(File.dirname(__FILE__), "..")
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urls = Hash[posts.map { |post|
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tumblr_url = URI.parse(post[:slug]).path
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jekyll_url = Jekyll::Post.new(site, dir, "", "tumblr/" + post[:name]).url
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redirect_dir = tumblr_url.sub(/\//, "") + "/"
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FileUtils.mkdir_p redirect_dir
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File.open(redirect_dir + "index.html", "w") do |f|
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f.puts "<html><head><meta http-equiv='Refresh' content='0; " +
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"url=#{jekyll_url}'></head><body></body></html>"
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end
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[tumblr_url, jekyll_url]
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}]
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posts.map { |post|
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urls.each do |tumblr_url, jekyll_url|
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post[:content].gsub!(/#{tumblr_url}/i, jekyll_url)
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end
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post
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}
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end
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File.open("_posts/tumblr/#{name}", "w") do |f|
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if format == "md"
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# Uses Python's html2text to convert a post's content to
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# markdown. Preserve HTML tables as per the markdown docs.
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def self.html_to_markdown(content)
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preserve = ["table", "tr", "th", "td"]
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preserve.each { |tag| content = content.gsub(/<#{tag}/i, "$$" + tag).gsub(/<\/#{tag}/i, "||" + tag) }
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preserve.each do |tag|
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content.gsub!(/<#{tag}/i, "$$" + tag)
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content.gsub!(/<\/#{tag}/i, "||" + tag)
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end
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content = %x[echo '#{content.gsub("'", "''")}' | html2text]
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preserve.each { |tag| content = content.gsub("$$" + tag, "<" + tag).gsub("||" + tag, "</" + tag) }
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preserve.each do |tag|
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content.gsub!("$$" + tag, "<" + tag)
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content.gsub!("||" + tag, "</" + tag)
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end
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header = {"layout" => "post", "title" => title, "tags" => post["tags"]}
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f.puts header.to_yaml + "---\n" + content
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end # End file
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end # End post XML
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if blog["posts"].size < 50
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break
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content
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end
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current_page += 1
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end # End while loop
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end # End method
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private
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# Adds pygments highlight tags to code blocks in posts that use
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# markdown format. This doesn't guess the language of the code
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# block, so you should modify this to suit your own content.
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# For example, my code block only contain Python and JavaScript,
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# so I can assume the block is JavaScript if it contains a
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# semi-colon.
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def self.add_syntax_highlights(content)
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lines = content.split("\n")
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block, indent, lang, start = false, /^ /, nil, nil
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lines.each_with_index do |line, i|
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if !block && line =~ indent
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block = true
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lang = "python"
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start = i
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elsif block
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lang = "javascript" if line =~ /;$/
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block = line =~ indent && i < lines.size - 1 # Also handle EOF
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if !block
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lines[start] = "{% highlight #{lang} %}"
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lines[i - 1] = "{% endhighlight %}"
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end
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lines[i] = lines[i].sub(indent, "")
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end
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end
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lines.join("\n")
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end
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def self.save_file(url, grab_image = false)
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unless grab_image == false
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FileUtils.mkdir_p "tumblr_files"
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File.open("tumblr_files/#{url.split('/').last}", "w") do |f|
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f.write(open(url).read)
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end
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return "/tumblr_files/#{url.split('/').last}"
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else
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return url
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