{{tag>Brouillon}}

= XML xpath parse

Il existe deux langages de requêtes XML : **XPath** et **XQuery**. 

Voir aussi :
* xml_grep (xml-twig-tools), xmldiff, [[https://en.wikipedia.org/wiki/XMLStarlet|xmlstarlet]]


== Lint

<code bash>
xmllint --noout fic.xml
</code>

== xpath

<code bash>
virsh dumpxml VM1 |xpath -q -e "/domain/devices/disk[@type='file']/source/@file[1]"
</code>


== Ansible

=== Exemple

''/etc/ImageMagick-6/policy.xml''
<code xml>
<policymap>
  <policy domain="resource" name="memory" value="256MiB"/>
  <policy domain="resource" name="map" value="512MiB"/>
  <policy domain="resource" name="width" value="16KP"/>
  <policy domain="resource" name="height" value="16KP"/>
  <policy domain="resource" name="area" value="128MB"/>
  <policy domain="resource" name="disk" value="1GiB"/>
  <!-- <policy domain="resource" name="time" value="3600"/> -->
  <policy domain="delegate" rights="none" pattern="URL" />
  <policy domain="delegate" rights="none" pattern="HTTPS" />
  <policy domain="delegate" rights="none" pattern="HTTP" />
  <policy domain="path" rights="none" pattern="@*"/>
</policymap>
</code>

Nous voulons ajouter

''/etc/ImageMagick-6/policy.xml''
<code xml>
<policymap>
  <policy domain="resource" name="time" value="5"/>
</policymap>
</code>

Conf Ansible

<code yaml>
- name: install deps for ansible xml module
  apt: name='{{ packages }}'
  vars:
    packages:
      - python-lxml  # For Ansible xml
      - python3-lxml # For Ansible xml

- name: /etc/ImageMagick-6/policy.xml - change timeout
  xml:
    path: /tmp/policy.xml
    xpath: /policymap/policy[@domain='resource' and @name='time']
    attribute: value
    value: "5"
</code>