Redmine 3.4.4

lib/redmine/codeset_util.rb

@@ -0,0 +1,68 @@
+
+module Redmine
+  module CodesetUtil
+
+    def self.replace_invalid_utf8(str)
+      return str if str.nil?
+      str.force_encoding('UTF-8')
+      if ! str.valid_encoding?
+        str = str.encode("UTF-16LE", :invalid => :replace,
+              :undef => :replace, :replace => '?').encode("UTF-8")
+      end
+      str
+    end
+
+    def self.to_utf8(str, encoding)
+      return str if str.nil?
+      str.force_encoding("ASCII-8BIT")
+      if str.empty?
+        str.force_encoding("UTF-8")
+        return str
+      end
+      enc = encoding.blank? ? "UTF-8" : encoding
+      if enc.upcase != "UTF-8"
+        str.force_encoding(enc)
+        str = str.encode("UTF-8", :invalid => :replace,
+              :undef => :replace, :replace => '?')
+      else
+        str = replace_invalid_utf8(str)
+      end
+      str
+    end
+
+    def self.to_utf8_by_setting(str)
+      return str if str.nil?
+      self.to_utf8_by_setting_internal(str).force_encoding('UTF-8')
+    end
+
+    def self.to_utf8_by_setting_internal(str)
+      return str if str.nil?
+      str.force_encoding('ASCII-8BIT')
+      return str if str.empty?
+      return str if /\A[\r\n\t\x20-\x7e]*\Z/n.match(str) # for us-ascii
+      str.force_encoding('UTF-8')
+      encodings = Setting.repositories_encodings.split(',').collect(&:strip)
+      encodings.each do |encoding|
+        begin
+          str.force_encoding(encoding)
+          utf8 = str.encode('UTF-8')
+          return utf8 if utf8.valid_encoding?
+        rescue
+          # do nothing here and try the next encoding
+        end
+      end
+      self.replace_invalid_utf8(str).force_encoding('UTF-8')
+    end
+
+    def self.from_utf8(str, encoding)
+      str ||= ''
+      str.force_encoding('UTF-8')
+      if encoding.upcase != 'UTF-8'
+        str = str.encode(encoding, :invalid => :replace,
+                         :undef => :replace, :replace => '?')
+      else
+        str = self.replace_invalid_utf8(str)
+      end
+    end
+  end
+end