Add encoding @config option

lib/kimurai/browser_builder/mechanize_builder.rb

@@ -141,6 +141,12 @@ def build
         logger.debug "BrowserBuilder (mechanize): enabled before_request.delay"
       end
 
+      # encoding
+      if encoding = @config[:encoding]
+        @browser.config.encoding = encoding
+        logger.debug "BrowserBuilder (mechanize): enabled encoding: #{encoding}"
+      end
+
       # return Capybara session instance
       @browser
     end

lib/kimurai/browser_builder/poltergeist_phantomjs_builder.rb

@@ -162,6 +162,12 @@ def build
         logger.debug "BrowserBuilder (poltergeist_phantomjs): enabled before_request.delay"
       end
 
+      # encoding
+      if encoding = @config[:encoding]
+        @browser.config.encoding = encoding
+        logger.debug "BrowserBuilder (poltergeist_phantomjs): enabled encoding: #{encoding}"
+      end
+
       # return Capybara session instance
       @browser
     end

lib/kimurai/browser_builder/selenium_chrome_builder.rb

@@ -185,6 +185,12 @@ def build
         logger.debug "BrowserBuilder (selenium_chrome): enabled before_request.delay"
       end
 
+      # encoding
+      if encoding = @config[:encoding]
+        @browser.config.encoding = encoding
+        logger.debug "BrowserBuilder (selenium_chrome): enabled encoding: #{encoding}"
+      end
+
       # return Capybara session instance
       @browser
     end

lib/kimurai/browser_builder/selenium_firefox_builder.rb

@@ -191,6 +191,12 @@ def build
         logger.debug "BrowserBuilder (selenium_firefox): enabled before_request.delay"
       end
 
+      # encoding
+      if encoding = @config[:encoding]
+        @browser.config.encoding = encoding
+        logger.debug "BrowserBuilder (selenium_firefox): enabled encoding: #{encoding}"
+      end
+
       # return Capybara session instance
       @browser
     end

lib/kimurai/capybara_ext/session.rb

@@ -88,7 +88,16 @@ def restart!
     def current_response(response_type = :html)
       case response_type
       when :html
-        Nokogiri::HTML(body)
+        if config.encoding
+          if config.encoding == :auto
+            charset = body.force_encoding("ISO-8859-1").encode("UTF-8")[/<meta.*?charset=["]?([\w+\d+\-]*)/i, 1]
+            Nokogiri::HTML(body, nil, charset)
+          else
+            Nokogiri::HTML(body, nil, config.encoding)
+          end
+        else
+          Nokogiri::HTML(body)
+        end
       when :json
         JSON.parse(body)
       end

lib/kimurai/capybara_ext/session/config.rb

@@ -1,6 +1,6 @@
 module Capybara
   class SessionConfig
-    attr_accessor :cookies, :proxy, :user_agent
+    attr_accessor :cookies, :proxy, :user_agent, :encoding
     attr_writer :retry_request_errors, :skip_request_errors
 
     def retry_request_errors