# Replace \<script\> tag on indexation

**URL:** <https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866>\
**Category:** Elasticsearch\
**Created:** [September 3, 2019, 1:01pm UTC](https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866 "2019-09-03T13:01:00Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Maxime\_Kuil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/maxime_kuil/32/53513_2.png) [@Maxime\_Kuil](https://discuss.elastic.co/u/Maxime_Kuil)\
**Post date:** [September 3, 2019, 1:01pm UTC](https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866/1 "2019-09-03T13:01:00Z")

</div>

Hello,

i want to replace `<script>....</script>` on index time.  
I tried :

```
POST _analyze
 {
   "tokenizer" : "icu_tokenizer",
 
       "filter": [
                 {
                    "type": "pattern_replace",
                    "pattern": "(<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>)",
                    "replacement": "",
                    "flags":"CASE_INSENSITIVE|MULTILINE"
                 }],
       "text":"<ul class=wrap><li><a class=toggleTabContent href=#rendement title=Rendement>Rendement</a></li><li><a class=toggleTabContent href=#frais title=Frais>Frais</a></li><li><a class=toggleTabContent href=#comment-investir title=Comment investir ?>Comment investir ?</a></li><li><a class=toggleTabContent href=#supports title=Supports>Supports</a></li><li><a class=toggleTabContent href=#souscrire-documentation title=Souscrire / documentation>Souscrire / documentation</a></li></ul></div><script>function lazyLoadIframes(){jQuery('[data-loaded=false]').each(function() {var llazy = jQuery(this);if (llazy[0].getBoundingClientRect().top != 0 && llazy[0].getBoundingClientRect().top - window.innerHeight < 0) {jQuery(this).attr(data-loaded, true);jQuery(this).attr(src, jQuery(this).attr(data-src));}});}window.addEventListener(scroll, lazyLoadIframes);$('body').on('click', '.s-accordion-title', function(){setTimeout(lazyLoadIframes, 300);});</script><style>iframe[data-loaded]{}</style><script type=\"text/javascript\">if(typeof(wpDataCharts)=='undefined'){wpDataCharts = {};}; wpDataCharts[1] = {render_data: {\"columns\":[{\"type\":\"string\",\"label\":\"Support\",\"orig_header\":\"support\"},{\"type\":\"number\",\"label\":\"Pourcentage\",\"orig_header\":\"pourcentage\"}],\"rows\":[[\"Fonds en euros (Actif g\u00e9n\u00e9ral)\",70],[\"Swisslife Funds Defensive - FR0010308825\",7.5],[\"M&G (Lux) Optimal Income Fund - LU1670724373\",7.5],[\"Oddo Avenir CR-EUR - FR0000989899\",7.5],[\"Comgest Monde C FR0000284689\",7.5]],\"axes\":{\"major\":{\"type\":\"string\",\"label\":\"Support\"},\"minor\":{\"type\":\"number\",\"label\":\"\"}},\"options\":{\"title\":\"\",\"series\":[],\"height\":\"400\",\"responsive_width\":1,\"hAxis\":{\"title\":\"\",\"direction\":\"1\"},\"vAxis\":{\"title\":\"\",\"direction\":\"1\",\"viewWindow\":{\"min\":\"\",\"max\":\"\"}},\"backgroundColor\":{\"fill\":\"\",\"strokeWidth\":\"0\",\"stroke\":\"\",\"rx\":\"0\"},\"chartArea\":{\"backgroundColor\":{\"fill\":\"\",\"strokeWidth\":\"\",\"stroke\":\"\"}},\"fontSize\":\"\",\"fontName\":\"Arial\",\"crosshair\":{\"trigger\":\"\",\"orientation\":\"\"},\"orientation\":\"horizontal\",\"titlePosition\":\"out\",\"tooltip\":{\"trigger\":\"focus\"},\"legend\":{\"position\":\"right\",\"alignment\":\"center\"}},\"vAxis\":[],\"hAxis\":[],\"errors\":[],\"series\":[{\"label\":\"Pourcentage\",\"color\":\"\",\"orig_header\":\"pourcentage\"}],\"group_chart\":false,\"show_grid\":true,\"type\":\"google_donut_chart\"}, engine: \"google\", type: \"google_donut_chart\", title: \"Allocations stars - Profil défensif - Répartition par support\", container: \"wpDataChart_1\", follow_filtering: 0, wpdatatable_id: 1, group_chart: 0}</script>"
     }

```

But `<script>` still remain. How can i do it ?  
Thanks

---

<div class="post-metadata">

**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [September 4, 2019, 7:56am UTC](https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866/2 "2019-09-04T07:56:13Z")

</div>

the original json of a document is not modified using a filter. what is modified is what is stored in the inverted index, against which searches are executed.

You could use a [ingest processor](https://www.elastic.co/guide/en/elasticsearch/reference/7.3/ingest-processors.html) to do your modification before the JSON is stored, i.e. a script processor.

---

<div class="post-metadata">

**Author:** ![Maxime\_Kuil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/maxime_kuil/32/53513_2.png) [@Maxime\_Kuil](https://discuss.elastic.co/u/Maxime_Kuil)\
**Post date:** [September 4, 2019, 8:04am UTC](https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866/3 "2019-09-04T08:04:31Z")

</div>

Thanks for your help.  
But, what i don't understand, if i use filter to replace a word, it works. Why my all `<script>...</script>` tag doesn't replace by my regex ?

---

<div class="post-metadata">

**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [September 4, 2019, 8:26am UTC](https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866/4 "2019-09-04T08:26:19Z")

</div>

du'h. I fully misread your question. So here is what happens. Try running your sample without the `filter` part and you will see three terms being emitted. So the tokenizer first splits your tokens, and then the token filter regex gets applied. However due to having three tokens at this stage already, the regular expression will never match.

Take a look at the [pattern replace char filter](https://www.elastic.co/guide/en/elasticsearch/reference/7.3/analysis-pattern-replace-charfilter.html) instead.

---

<div class="post-metadata">

**Author:** ![Maxime\_Kuil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/maxime_kuil/32/53513_2.png) [@Maxime\_Kuil](https://discuss.elastic.co/u/Maxime_Kuil)\
**Post date:** [September 4, 2019, 8:49am UTC](https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866/5 "2019-09-04T08:49:44Z")

</div>

I tried, but `<script></script>` still remain

```
    PUT test
    {
      "settings": {
        "analysis": {
          "analyzer": {
            "my_analyzer": {
              "tokenizer": "icu_tokenizer",
              "char_filter": [
                "my_char_filter"
              ],
              "filter": [
                "lowercase"
              ]
            }
          },
          "char_filter": {
            "my_char_filter": {
              "type": "pattern_replace",
              "pattern": "(<script\b[^<]*(?:(?!</script>)<[^<]*)*</script>)",
              "replacement": " "
            }
          }
        }
      },
      "mappings": {
        "ess": {
          "properties": {
            "text": {
              "type": "text",
              "analyzer": "my_analyzer"
            }
          }
        }
      }
    }

POST test/_analyze
{
  "analyzer": "my_analyzer",
  "text": "<ul class=wrap><li><a class=toggleTabContent href=#rendement title=Rendement>Rendement</a></li><li><a class=toggleTabContent href=#frais title=Frais>Frais</a></li><li><a class=toggleTabContent href=#comment-investir title=Comment investir ?>Comment investir ?</a></li><li><a class=toggleTabContent href=#supports title=Supports>Supports</a></li><li><a class=toggleTabContent href=#souscrire-documentation title=Souscrire / documentation>Souscrire / documentation</a></li></ul></div><script>function lazyLoadIframes(){jQuery('[data-loaded=false]').each(function() {var llazy = jQuery(this);if (llazy[0].getBoundingClientRect().top != 0 && llazy[0].getBoundingClientRect().top - window.innerHeight < 0) {jQuery(this).attr(data-loaded, true);jQuery(this).attr(src, jQuery(this).attr(data-src));}});}window.addEventListener(scroll, lazyLoadIframes);$('body').on('click', '.s-accordion-title', function(){setTimeout(lazyLoadIframes, 300);});</script><style>iframe[data-loaded]{}</style><script type=\"text/javascript\">if(typeof(wpDataCharts)=='undefined'){wpDataCharts = {};}; wpDataCharts[1] = {render_data: {\"columns\":[{\"type\":\"string\",\"label\":\"Support\",\"orig_header\":\"support\"},{\"type\":\"number\",\"label\":\"Pourcentage\",\"orig_header\":\"pourcentage\"}],\"rows\":[[\"Fonds en euros (Actif g\u00e9n\u00e9ral)\",70],[\"Swisslife Funds Defensive - FR0010308825\",7.5],[\"M&G (Lux) Optimal Income Fund - LU1670724373\",7.5],[\"Oddo Avenir CR-EUR - FR0000989899\",7.5],[\"Comgest Monde C FR0000284689\",7.5]],\"axes\":{\"major\":{\"type\":\"string\",\"label\":\"Support\"},\"minor\":{\"type\":\"number\",\"label\":\"\"}},\"options\":{\"title\":\"\",\"series\":[],\"height\":\"400\",\"responsive_width\":1,\"hAxis\":{\"title\":\"\",\"direction\":\"1\"},\"vAxis\":{\"title\":\"\",\"direction\":\"1\",\"viewWindow\":{\"min\":\"\",\"max\":\"\"}},\"backgroundColor\":{\"fill\":\"\",\"strokeWidth\":\"0\",\"stroke\":\"\",\"rx\":\"0\"},\"chartArea\":{\"backgroundColor\":{\"fill\":\"\",\"strokeWidth\":\"\",\"stroke\":\"\"}},\"fontSize\":\"\",\"fontName\":\"Arial\",\"crosshair\":{\"trigger\":\"\",\"orientation\":\"\"},\"orientation\":\"horizontal\",\"titlePosition\":\"out\",\"tooltip\":{\"trigger\":\"focus\"},\"legend\":{\"position\":\"right\",\"alignment\":\"center\"}},\"vAxis\":[],\"hAxis\":[],\"errors\":[],\"series\":[{\"label\":\"Pourcentage\",\"color\":\"\",\"orig_header\":\"pourcentage\"}],\"group_chart\":false,\"show_grid\":true,\"type\":\"google_donut_chart\"}, engine: \"google\", type: \"google_donut_chart\", title: \"Allocations stars - Profil défensif - Répartition par support\", container: \"wpDataChart_1\", follow_filtering: 0, wpdatatable_id: 1, group_chart: 0}</script>"
}
```

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 2, 2019, 8:49am UTC](https://discuss.elastic.co/t/replace-script-tag-on-indexation/197866/6 "2019-10-02T08:49:44Z")

</div>

Closed on October 2, 2019, 8:49am UTC

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