☰

如何将来自digest.rdf的哈希值提供给ansible get_url？

tag-icon • tag-icon ansible
如何将来自digest.rdf的哈希值提供给ansible get_url？

例如这里我们有一个摘要列表。我想知道是否有简单的方法可以从中生成 get_url 的校验和值。

有没有简单的方法将rdf解析成字典？或者也许我们可以像xml一样查询rdf路径？

更新

我刚刚意识到 rdf 是带有一些命名空间的 xml。我可以用像Python的lxml这样的程序语言来查询它，如下所示：

from lxml import etree
root = etree.parse("/tmp/digest.rdf")
ns = root.getroot().nsmap
root.xpath('/rdf:RDF/digest:Content[@rdf:about="magick"]/digest:sha256/text()', namespaces=ns)[0]

但我无法让它在 ansible 中工作：

  1. 我必须显式设置名称空间参数。
  2. 我不能/text()让它只返回文本。如果没有它，返回的匹配值是一个字典列表。
ansible localhost -m xml -a 'path=/tmp/digest.rdf xpath=/rdf:RDF/digest:Content[@rdf:about="magick"]/digest:sha256/text() print_match=yes' -i inventory
PLAY [Ansible Ad-Hoc] *************************************************************************************************************************************************************************************

TASK [xml] ************************************************************************************************************************************************************************************************
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: lxml.etree.XPathEvalError: Undefined namespace prefix
fatal: [localhost]: FAILED! => changed=false 
  module_stderr: |-
    Traceback (most recent call last):
      File "<stdin>", line 107, in <module>
      File "<stdin>", line 99, in _ansiballz_main
      File "<stdin>", line 47, in invoke_module
      File "/usr/lib/python3.10/runpy.py", line 224, in run_module
        return _run_module_code(code, init_globals, run_name, mod_spec)
      File "/usr/lib/python3.10/runpy.py", line 96, in _run_module_code
        _run_code(code, mod_globals, init_globals,
      File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
        exec(code, run_globals)
      File "/tmp/ansible_xml_payload_zgisyqdh/ansible_xml_payload.zip/ansible_collections/community/general/plugins/modules/xml.py", line 989, in <module>
      File "/tmp/ansible_xml_payload_zgisyqdh/ansible_xml_payload.zip/ansible_collections/community/general/plugins/modules/xml.py", line 943, in main
      File "/tmp/ansible_xml_payload_zgisyqdh/ansible_xml_payload.zip/ansible_collections/community/general/plugins/modules/xml.py", line 399, in do_print_match
      File "src/lxml/etree.pyx", line 2311, in lxml.etree._ElementTree.xpath
      File "src/lxml/xpath.pxi", line 357, in lxml.etree.XPathDocumentEvaluator.__call__
      File "src/lxml/xpath.pxi", line 225, in lxml.etree._XPathEvaluatorBase._handle_result
    lxml.etree.XPathEvalError: Undefined namespace prefix
  module_stdout: ''
  msg: |-
    MODULE FAILURE
    See stdout/stderr for the exact error
  rc: 1

有没有办法让它像lxml一样自动获取nsmap？

相关内容