Merge pull request #421 from djreimer/url-encode-filter

Add url_encode standard filter

History.md

@@ -3,6 +3,7 @@
 ## 3.0.0 / not yet released / branch "master"
 
 * ...
+* Add url_encode to standard filters, see #421 [Derrick Reimer, djreimer]
 * Add uniq to standard filters [Florian Weingarten, fw42]
 * Add exception_handler feature, see #397 and #254 [Bogdan Gusiev, bogdan and Florian Weingarten, fw42]
 * Optimize variable parsing to avoid repeated regex evaluation during template rendering #383 [Jason Hiltz-Laforge, jasonhl]

lib/liquid/standardfilters.rb

@@ -42,6 +42,10 @@ module Liquid
       input.to_s.gsub(HTML_ESCAPE_ONCE_REGEXP, HTML_ESCAPE)
     end
 
+    def url_encode(input)
+      CGI.escape(input) rescue input
+    end
+
     def slice(input, offset, length=nil)
       offset = Integer(offset)
       length = length ? Integer(length) : 1

test/integration/standard_filter_test.rb

@@ -118,6 +118,11 @@ class StandardFiltersTest < Minitest::Test
     assert_equal '&lt;strong&gt;Hulk&lt;/strong&gt;', @filters.escape_once('&lt;strong&gt;Hulk</strong>')
   end
 
+  def test_url_encode
+    assert_equal 'foo%2B1%40example.com', @filters.url_encode('foo+1@example.com')
+    assert_equal nil, @filters.url_encode(nil)
+  end
+
   def test_truncatewords
     assert_equal 'one two three', @filters.truncatewords('one two three', 4)
     assert_equal 'one two...', @filters.truncatewords('one two three', 2)