Merge pull request #3 from picandocodigo/html_pipeline

Use Html pipeline locally instead of hitting the Github API

README.md

@@ -38,8 +38,8 @@ good tools, but none are able to truly reproduce the custom features added to
 [Github Flavored Markdown](http://github.github.com/github-flavored-markdown/). 
 This is especially notable with fenced code blocks and syntax highlighting.
 
-`ghpreview` is an accurate preview because it uses Github's own [Markdown 
-Rendering API](http://developer.github.com/v3/markdown/) to generate the HTML, 
+`ghpreview` is an accurate preview because it uses Github's own [HTML 
+processing filters](https://github.com/jch/html-pipeline) to generate the HTML, 
 and Github's own stylesheets to style it.
 
 ## Contributing

ghpreview.gemspec

@@ -19,5 +19,6 @@ Gem::Specification.new do |gem|
 
   gem.add_dependency 'listen'
   gem.add_dependency 'rb-fsevent'
+  gem.add_dependency 'html-pipeline'
   gem.add_dependency 'httpclient'
 end

lib/ghpreview/previewer.rb

@@ -1,14 +1,14 @@
 require 'erb'
-require 'httpclient'
+require 'html/pipeline'
 require 'listen'
+require 'httpclient'
 
 module GHPreview
   class Previewer
-    API_URI                  = 'https://api.github.com/markdown/raw'
-    HOMEPAGE                 = 'https://github.com'
     HTML_FILEPATH            = '/tmp/ghpreview.html'
     RAW_TEMPLATE_FILEPATH    = "#{File.dirname(__FILE__)}/template.erb"
     STYLED_TEMPLATE_FILEPATH = "/tmp/ghpreview-template.erb"
+    HOMEPAGE = 'https://github.com'
 
     def initialize(md_filepath, options = {})
       @md_filepath = md_filepath
@@ -46,8 +46,17 @@ def open
 
     def markdown_to_html
       markdown = File.read(@md_filepath)
-      message  = @http.post API_URI, body: markdown, header: {'Content-Type' => 'text/plain'}
-      message.body
+      pipeline = HTML::Pipeline.new([
+        HTML::Pipeline::MarkdownFilter,
+        HTML::Pipeline::SanitizationFilter,
+        HTML::Pipeline::CamoFilter,
+        HTML::Pipeline::ImageMaxWidthFilter,
+        HTML::Pipeline::HttpsFilter,
+        HTML::Pipeline::MentionFilter,
+        HTML::Pipeline::EmojiFilter,
+        HTML::Pipeline::SyntaxHighlightFilter
+      ], gfm: false)
+      result = pipeline.call(markdown)[:output].to_s
     end
 
     def generate_template_with_fingerprinted_stylesheet_links