Added example.

OnlineEditorsExample/OnlineEditorsExampleRuby/app/models/signature.rb

@@ -0,0 +1,43 @@
+class Signature
+
+  class << self
+
+    def create(key, secret)
+
+      #secret = '_ContactUs_'
+      #key = '{"expire":"\/Date(1422449303583)\/","key":"mo.docx1422449303571","key_id":"_ContactUs_","user_count":0}'
+
+      payload = get_hash_base64(key + secret) + '?' + key
+      encode = url_token_encode(payload)
+
+    end
+
+    def get_hash_base64(str)
+
+      utf8 = str.encode('utf-8')
+      sha256 = Digest::SHA256.digest(utf8)
+      base64 = Base64.strict_encode64(sha256)
+
+    end
+
+    def url_token_encode(str)
+
+      utf8 = str.encode('utf-8')
+      base64 = Base64.strict_encode64(utf8)
+
+      cnt = 0
+      base64.each_char {|c|
+        if c == '='
+          cnt += 1
+        end
+      }
+
+      signature = base64.gsub('=', '') + cnt.to_s
+      signature = signature.gsub('+', '-').gsub('/', '_')
+      signature = URI.encode(signature)
+
+    end
+
+  end
+
+end