Use POST in sqllab_viz instead of url params to avoid error with long queries (#1933)

* Use POST in sqllab_viz instead of url params to avoid error with long queries

* Delete error handling

* Fix returning statement

superset/assets/javascripts/SqlLab/components/VisualizeModal.jsx

@@ -4,6 +4,7 @@ import { Alert, Button, Col, Modal } from 'react-bootstrap';
 import Select from 'react-select';
 import { Table } from 'reactable';
 import shortid from 'shortid';
+import $ from 'jquery';
 
 const CHART_TYPES = [
   { value: 'dist_bar', label: 'Distribution - Bar Chart', requiresTime: false },
@@ -105,7 +106,17 @@ class VisualizeModal extends React.PureComponent {
       sql: this.props.query.sql,
       dbId: this.props.query.dbId,
     };
-    window.open('/superset/sqllab_viz/?data=' + JSON.stringify(vizOptions));
+    $.ajax({
+      type: 'POST',
+      url: '/superset/sqllab_viz/',
+      async: false,
+      data: {
+        data: JSON.stringify(vizOptions),
+      },
+      success: (url) => {
+        window.open(url);
+      },
+    });
   }
   changeDatasourceName(event) {
     this.setState({ datasourceName: event.target.value });

superset/views.py

@@ -2222,10 +2222,10 @@ class Superset(BaseSupersetView):
         return Response(status=201)
 
     @has_access
-    @expose("/sqllab_viz/")
+    @expose("/sqllab_viz/", methods=['POST'])
     @log_this
     def sqllab_viz(self):
-        data = json.loads(request.args.get('data'))
+        data = json.loads(request.form.get('data'))
         table_name = data.get('datasourceName')
         viz_type = data.get('chartType')
         table = (
@@ -2283,8 +2283,7 @@ class Superset(BaseSupersetView):
             'limit': '0',
         }
         params = "&".join([k + '=' + v for k, v in params.items() if v])
-        url = '/superset/explore/table/{table.id}/?{params}'.format(**locals())
-        return redirect(url)
+        return '/superset/explore/table/{table.id}/?{params}'.format(**locals())
 
     @has_access
     @expose("/table/<database_id>/<table_name>/<schema>/")