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# My litte plugin for intelligently importing flickr photos. | ||
# TODO: Write me :p |
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require 'cgi' | ||
require 'digest/md5' | ||
require 'net/https' | ||
require 'uri' | ||
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# From https://gist.github.com/803483 | ||
module Jekyll | ||
class GistTag < Liquid::Tag | ||
def initialize(tag_name, text, token) | ||
super | ||
@text = text | ||
@cache_disabled = false | ||
@cache_folder = File.expand_path "../_gist_cache", File.dirname(__FILE__) | ||
end | ||
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def render(context) | ||
if parts = @text.match(/([\d]*) (.*)/) | ||
gist, file = parts[1].strip, parts[2].strip | ||
script_url = script_url_for gist, file | ||
code = get_cached_gist(gist, file) || get_gist_from_web(gist, file) | ||
html_output_for script_url, code | ||
else | ||
"" | ||
end | ||
end | ||
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def html_output_for(script_url, code) | ||
code = CGI.escapeHTML code | ||
"<script src='#{script_url}'></script><noscript><pre><code>#{code}</code></pre></noscript>" | ||
end | ||
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def script_url_for(gist_id, filename) | ||
"https://gist.github.com/#{gist_id}.js?file=#{filename}" | ||
end | ||
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def get_gist_url_for(gist, file) | ||
"https://gist.github.com/raw/#{gist}/#{file}" | ||
end | ||
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def cache(gist, file, data) | ||
cache_file = get_cache_file_for gist, file | ||
File.open(cache_file, "w") do |io| | ||
io.write data | ||
end | ||
end | ||
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def get_cached_gist(gist, file) | ||
return nil if @cache_disabled | ||
cache_file = get_cache_file_for gist, file | ||
File.read cache_file if File.exist? cache_file | ||
end | ||
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def get_cache_file_for(gist, file) | ||
bad_chars = /[^a-zA-Z0-9\-_.]/ | ||
gist = gist.gsub bad_chars, '' | ||
file = file.gsub bad_chars, '' | ||
md5 = Digest::MD5.hexdigest "#{gist}-#{file}" | ||
File.join @cache_folder, "#{gist}-#{file}-#{md5}.cache" | ||
end | ||
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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, file, data unless @cache_disabled | ||
data | ||
end | ||
end | ||
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class GistTagNoCache < GistTag | ||
def initialize(tag_name, text, token) | ||
super | ||
@cache_disabled = true | ||
end | ||
end | ||
end | ||
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Liquid::Template.register_tag('gist', Jekyll::GistTag) | ||
Liquid::Template.register_tag('gistnocache', Jekyll::GistTagNoCache) |