84 lines
2.4 KiB
Ruby
84 lines
2.4 KiB
Ruby
# Nicked from Brandon Tilly
|
|
# Gist https://gist.github.com/803483
|
|
# Post http://brandontilley.com/2011/01/31/gist-tag-for-jekyll.html
|
|
#
|
|
# Example usage: {% gist 803483 gist_tag.rb %} //embeds a gist for this plugin
|
|
|
|
require 'digest/md5'
|
|
require 'net/https'
|
|
require 'uri'
|
|
|
|
module Jekyll
|
|
class GistTag < Liquid::Tag
|
|
def initialize(tag_name, text, token)
|
|
super
|
|
system('mkdir -p .gist_cache')
|
|
@text = text
|
|
@cache = true
|
|
@cache_folder = File.expand_path "../.gist_cache", File.dirname(__FILE__)
|
|
end
|
|
|
|
def render(context)
|
|
return "" unless @text =~ /([\d]*) (.*)/
|
|
|
|
gist, file = $1.strip, $2.strip
|
|
script_url = "https://gist.github.com/#{gist}.js?file=#{file}"
|
|
|
|
code = get_cached_gist(gist, file) || get_gist_from_web(gist, file)
|
|
code = code.gsub "<", "<"
|
|
string = "<script src='#{script_url}'></script>"
|
|
string += "<noscript><pre><code>#{code}</code></pre></noscript>"
|
|
return string
|
|
end
|
|
|
|
def get_gist_url_for(gist, file)
|
|
"https://gist.github.com/raw/#{gist}/#{file}"
|
|
end
|
|
|
|
def cache_gist(gist, file, data)
|
|
file = get_cache_file_for gist, file
|
|
File.open(file, "w+") do |f|
|
|
f.write(data)
|
|
end
|
|
end
|
|
|
|
def get_cached_gist(gist, file)
|
|
return nil if @cache == false
|
|
file = get_cache_file_for gist, file
|
|
return nil unless File.exist?(file)
|
|
return File.new(file).readlines.join
|
|
end
|
|
|
|
def get_cache_file_for(gist, file)
|
|
gist.gsub! /[^a-zA-Z0-9\-_\.]/, ''
|
|
file.gsub! /[^a-zA-Z0-9\-_\.]/, ''
|
|
md5 = Digest::MD5.hexdigest "#{gist}-#{file}"
|
|
File.join @cache_folder, "#{gist}-#{file}-#{md5}.cache"
|
|
end
|
|
|
|
def get_gist_from_web(gist, file)
|
|
gist_url = get_gist_url_for(gist, file)
|
|
raw_uri = URI.parse(gist_url)
|
|
https = Net::HTTP.new(raw_uri.host, raw_uri.port)
|
|
https.use_ssl = true
|
|
https.verify_mode = OpenSSL::SSL::VERIFY_NONE
|
|
request = Net::HTTP::Get.new(raw_uri.request_uri)
|
|
data = https.request(request)
|
|
data = data.body
|
|
cache_gist(gist, file, data) unless @cache == false
|
|
data
|
|
end
|
|
end
|
|
|
|
class GistTagNoCache < GistTag
|
|
def initialize(tag_name, text, token)
|
|
super
|
|
@cache = false
|
|
end
|
|
end
|
|
end
|
|
|
|
Liquid::Template.register_tag('gist', Jekyll::GistTag)
|
|
Liquid::Template.register_tag('gistnocache', Jekyll::GistTagNoCache)
|
|
|