Allowing Leading and Trailing spaces in connection (#3433)

superset/models/core.py

@@ -596,7 +596,7 @@ class Database(Model, AuditMixinNullable):
         return url_copy
 
     def set_sqlalchemy_uri(self, uri):
-        conn = sqla.engine.url.make_url(uri)
+        conn = sqla.engine.url.make_url(uri.strip())
         if conn.password != PASSWORD_MASK and not self.custom_password_store:
             # do not over-write the password with the password mask
             self.password = conn.password

superset/templates/superset/models/database/macros.html

@@ -18,7 +18,7 @@
       var data = {};
       try{
         data = JSON.stringify({
-          uri: $("#sqlalchemy_uri").val(),
+          uri: $.trim($("#sqlalchemy_uri").val()),
           name: $('#database_name').val(),
           impersonate_user: $('#impersonate_user').is(':checked'),
           extras: JSON.parse($("#extra").val()),