Merge branch 'gr4y-master'

* gr4y-master:
  Require Ruby 2.0 or greater now.
  response body could be nil, so I removed chomp
  Replaced OpenURI with NET::HTTP and introduced timeout of 3 seconds

Author: parkr

jekyll-gist.gemspec

@@ -12,6 +12,8 @@ Gem::Specification.new do |spec|
   spec.homepage      = "https://github.com/jekyll/jekyll-gist"
   spec.license       = "MIT"
 
+  spec.required_ruby_version = '>= 2.0'
+
   spec.files         = `git ls-files -z`.split("\x0")
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})

lib/jekyll-gist/gist_tag.rb

@@ -1,5 +1,5 @@
 require 'cgi'
-require 'open-uri'
+require 'net/http'
 
 module Jekyll
   module Gist
@@ -57,13 +57,24 @@ def gist_noscript_tag(gist_id, filename = nil)
       end
 
       def fetch_raw_code(gist_id, filename = nil)
+        url = "https://gist.githubusercontent.com/#{gist_id}/raw"
+        url = "#{url}/#{filename}" unless filename.empty?
         begin
-          url = "https://gist.githubusercontent.com/#{gist_id}/raw"
-          url = "#{url}/#{filename}" unless filename.empty?
-          open(url).read.chomp
+          uri = URI(url)
+          Net::HTTP.start(uri.host, uri.port,
+            use_ssl: uri.scheme == 'https', 
+            read_timeout: 3, open_timeout: 3) do |http|
+            request = Net::HTTP::Get.new uri
+            response = http.request(request)
+            response.body
+          end
         rescue SocketError
           nil
-        rescue OpenURI::HTTPError
+        rescue Net::HTTPError
+          nil
+        rescue Net::OpenTimeout
+          nil
+        rescue Net::ReadTimeout
           nil
         end
       end