Add #upload_request_params

Author: rastating

lib/wpxf/wordpress/shell_upload.rb

@@ -60,6 +60,11 @@ def expected_upload_response_code
     200
   end
 
+  # @return [Hash] the query string parameters to use when submitting the upload request.
+  def upload_request_params
+    nil
+  end
+
   # Run the module.
   # @return [Boolean] true if successful.
   def run
@@ -98,7 +103,7 @@ def payload_name_length
 
   def upload_payload(builder)
     builder.create do |body|
-      @upload_result = execute_post_request(url: uploader_url, body: body, cookie: @session_cookie)
+      @upload_result = execute_post_request(url: uploader_url, params: upload_request_params, body: body, cookie: @session_cookie)
     end
 
     if @upload_result.nil? || @upload_result.timed_out?