Special characters in searching feature with Tika

[jesmrec]

Describe the bug

File that contains special characters like any of these ñíôùë*+ç$%&@? . iOS client performs a server-side-search over the content using an special character. Server does return empty or incomplete result. Some results seems not to be correct.

Steps to reproduce

Create a txt file called sum.txt with the following content:

one+one=two
four+four=eight

using iOS client, searching by content:

typed string in client	returned	Passed?	comment
one	no result	❌	one exists twice
four	sum.txt	✅
+	no result	❌	+ exists
=	no result	❌	= exists
on	sum.txt	✅
one+one	no result	❌	one+one fits the content
four+four	no result	❌	four+four fits the content

there are more examples with the other characters mentioned above.

This is the curl you can use to reproduce:

curl -X REPORT https://xx.xx.xx.xx:9200/remote.php/dav/spaces 
-H 'Host: xx.xx.xx.xx:9200' 
-H 'Original-Request-ID: B88FCC21-5664-4706-96A3-C3C2B314770B' --compressed 
-H 'Connection: keep-alive' 
-H 'User-Agent: ownCloudApp/12.4.0 (App/296; iOS/18.2; iPhone)' 
-H 'Accept-Language: en' 
-H 'Authorization: Bearer ...' 
-d '<?xml version="1.0" encoding="UTF-8"?>
<oc:search-files xmlns:D="DAV:" xmlns:oc="http://owncloud.org/ns">
  <D:prop>
  <D:resourcetype/>
  <D:getlastmodified/>
  <D:getcontentlength/>
  <D:getcontenttype/>
  <D:getetag/>
  <oc:id/>
  <oc:size/>
  <oc:permissions/>
  <oc:favorite/>
  <oc:share-types/>
  <oc:owner-id/>
  <oc:owner-display-name/>
  </D:prop>
  <oc:search>
    <oc:pattern>(content:&quot;*one*&quot;)</oc:pattern>
    <oc:limit>100</oc:limit>
  </oc:search>
</oc:search-files>'

replace *one* in the oc:pattern property for different results.

Setup

Created a docker container with server side search by using the following docker-compose.yml file:

version: "3.7"

services:
  ocis:
    image: owncloud/ocis:7.0.1
    ports:
      - "9200:9200"
      - "9215:9215"
    environment:
      OCIS_INSECURE: "true"
      OCIS_URL: "https://IP:9200"
      IDM_CREATE_DEMO_USERS: "true"
      IDM_ADMIN_PASSWORD: "admin"
      PROXY_ENABLE_BASIC_AUTH: "true"
      OCIS_SERVICE_ACCOUNT_ID: "b0fbfad7-3dd6-49cb-b468-3f588f2f82be"
      OCIS_SERVICE_ACCOUNT_SECRET: "asaGE4DF"
      SEARCH_EXTRACTOR_TYPE: tika
      SEARCH_EXTRACTOR_TIKA_TIKA_URL: "http://tika:9998"
      FRONTEND_FULL_TEXT_SEARCH_ENABLED: "true"
    restart: "no"
    entrypoint: ["/bin/sh"]
    command: ["-c", "ocis init || true; ocis server"]
    networks:
      - ocis-net

  tika:
    image: apache/tika:2.9.0.0-full
    restart: "always"
    networks:
      - ocis-net

networks:
  ocis-net:

</p>
</details>

## Additional context
Add any other context about the problem here.

[jesmrec]

OTOH, using a date for a more accurate search, does not work either

<oc:search>
    <oc:pattern>((mtime:&gt;2024-12-31T23:00:00+00:00) AND (name:&quot;*Joe*&quot;))</oc:pattern>
    <oc:limit>100</oc:limit>
</oc:search>

returns an empty set of values.