add post_form to cur_page

src/mechanize.cr

@@ -38,9 +38,9 @@ class Mechanize
     post_form(uri, form, headers)
   end
 
+  # send POST request from form.
   def post_form(uri, form, headers)
-    #cur_page = form.page || current_page ||
-    #  Page.new
+    cur_page = form.page || (current_page unless history.empty?)
 
     request_data = form.request_data
     content_headers = ::HTTP::Headers{

src/mechanize/form.cr

@@ -20,6 +20,7 @@ class MechanizeCr::Form
   getter enctype      : String
   getter method       : String
   getter name         : String
+  getter page         : Page?
   property action     : String
 
   def initialize(node : Node | Myhtml::Node, page : Page? = nil)

src/mechanize/http/agent.cr

@@ -18,7 +18,9 @@ module MechanizeCr
         @user_agent = ""
       end
 
-      def fetch(uri, method = :get, headers = HTTP::Headers.new, params = Hash(String,String).new)
+      def fetch(uri, method = :get, headers = HTTP::Headers.new, params = Hash(String,String).new,
+                )#referer = current_page)
+        #referer_uri = referer.uri
         uri = resolve(uri)
         set_request_headers(uri, headers)
         set_user_agent