# \[Selenium\] Domain Extractor: Insert Missing instead of empty + fail option

**URL:** <https://forum.knime.com/t/selenium-domain-extractor-insert-missing-instead-of-empty-fail-option/89162>\
**Category:** Community Extensions\
**Tags:** feature-request, palladian-selenium\
**Created:** [July 18, 2025, 8:39am UTC](https://forum.knime.com/t/selenium-domain-extractor-insert-missing-instead-of-empty-fail-option/89162 "2025-07-18T08:39:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mwiegand](https://forum-cdn.knime.com/user_avatar/forum.knime.com/mwiegand/32/66896_2.png) [@mwiegand](https://forum.knime.com/u/mwiegand)\
**Post date:** [July 18, 2025, 8:39am UTC](https://forum.knime.com/t/selenium-domain-extractor-insert-missing-instead-of-empty-fail-option/89162/1 "2025-07-18T08:39:55Z")

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Hi @qqilihq,

if the domain extractor encounters an invalid domain like these:

```auto
http://:10255mytestmongodb.documents.azure.com/
http://:1234blabla.blalba.com/bla/some_cryptical_text_and_numbers:CSV:::::/
http://:1521vivlp01.viv.olsp/vivdp01.viv.olsp
http://:1589dwhp.reteunitaria.piemonte.it/DWHPDC/
http://:33techws.main-data.net/cuentas/saldos/
http://:37265localhost/
http://:37488cm-worker13-all-prod.emag.network/
http://:38101localhost/v1/predict/08aed24a-5d94-40fb-b537-53d7e3d42acf/
http://:4040localhost/
http://:51355127.0.0.1/oauth/
http://:53878127.0.0.1/

```

It returns an empty cell which is difficult to deal with.

![image](https://forum-cdn.knime.com/uploads/default/original/3X/b/6/b6f062e44f1183652c3ce6bd3b513a3fb37043f3.png)

I’d like to porpose to add two options:

1. Return missing
2. Fail on error or add verification column

Especially the Fail on error would allow to easily identify if a domain is valid or not, sparing it from processing which helps improve workflow reliability.

Best  
Mike

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<div class="post-metadata">

**Author:** ![system](https://forum-cdn.knime.com/uploads/default/original/1X/ab3ccf34482a0329361734a18199390177204f15.png) [@system](https://forum.knime.com/u/system)\
**Post date:** [October 16, 2025, 8:40am UTC](https://forum.knime.com/t/selenium-domain-extractor-insert-missing-instead-of-empty-fail-option/89162/2 "2025-10-16T08:40:05Z")

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