Make dry run endpoint use POST, same parameters as imports

app/controllers/carto/api/connectors_controller.rb

@@ -103,10 +103,10 @@ module Carto
 
       def dryrun
         provider_id = params[:provider_id]
-        parameters = build_connection_parameters(provider_id, params)
+        params[:provider] = provider_id
         if Carto::Connector.dry_run?(provider_id)
           begin
-            connector = Carto::Connector.new(parameters, user: current_user, logger: nil)
+            connector = Carto::Connector.new(params, user: current_user, logger: nil)
             render_jsonp(connector.dry_run.except(:client_error))
           rescue Carto::Connector::NotImplemented => e
             render_jsonp({ errors: e.message }, 501)

config/routes.rb

@@ -728,7 +728,7 @@ CartoDB::Application.routes.draw do
       get 'connectors/:provider_id/connect' => 'connectors#connect', as: :api_v1_connectors_connect
       get 'connectors/:provider_id/projects' => 'connectors#projects', as: :api_v1_connectors_projects
       get 'connectors/:provider_id/:project_id/tables' => 'connectors#project_tables', as: :api_v1_connectors_project_tables
-      get 'connectors/:provider_id/dryrun' => 'connectors#dryrun', as: :api_v1_connectors_dryrun
+      post 'connectors/:provider_id/dryrun' => 'connectors#dryrun', as: :api_v1_connectors_dryrun
     end
   end