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Run without internet access

See original GitHub issue

I encountered an issue running cyclonedx-py 0.3.5 in an environment with no internet access. The tool fails with the stack trace below, apparently trying to connect to

We had excellent experience with CycloneDX for .NET, Java and NPM, which do not require internet access, when configured with on-premise package feeds.

Is it possible to configure cyclonedx-py to run without internet access? An on-premise Pip source is available, if necessary, but no other external resources are accessible.

If the answer is no currently, and code changes are required to support this case, I would be interested to contribute a PR, as long as someone can provide a few pointers on how to disable internet access.

Traceback (most recent call last):
  File "python\lib\", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "python\lib\", line 87, in _run_code
    exec(code, run_globals)
  File "python\Scripts\cyclonedx-py.exe\", line 4, in <module>
  File "python\lib\site-packages\cyclonedx\cli\", line 25, in <module>
    from cyclonedx import BomValidator
  File "python\lib\site-packages\cyclonedx\", line 19, in <module>
    bom_schema = xmlschema.XMLSchema("")
  File "python\lib\site-packages\xmlschema\validators\", line 270, in __init__
    self.source = XMLResource(source, base_url, defuse, timeout, lazy=False)
  File "python\lib\site-packages\xmlschema\", line 279, in __init__
    self.source = source
  File "python\lib\site-packages\xmlschema\", line 303, in __setattr__
    self._root, self._text, self._url = self._fromsource(value)
  File "python\lib\site-packages\xmlschema\", line 381, in _fromsource
    resource = urlopen(url, timeout=self.timeout)
  File "python\lib\urllib\", line 222, in urlopen
    return, data, timeout)
  File "python\lib\urllib\", line 531, in open
    response = meth(req, response)
  File "python\lib\urllib\", line 640, in http_response
    response = self.parent.error(
  File "python\lib\urllib\", line 569, in error
    return self._call_chain(*args)
  File "python\lib\urllib\", line 502, in _call_chain
    result = func(*args)
  File "python\lib\urllib\", line 649, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 403: Forbidden

Environment information:

  • Windows 10 (2004) 64-bit
  • Python 3.8.5 x64
  • cyclonedx_bom 0.3.5

Issue Analytics

  • State:closed
  • Created 3 years ago
  • Comments:5 (3 by maintainers)

github_iconTop GitHub Comments

coderpatroscommented, Sep 3, 2020

Thanks for confirming that @nil4

There was a packaging bug where the schema files weren’t being included in the package.

What that warning basically means is that you will be missing a bit of additional information like the author and licence. But depending on your use case you might not be worried about that.

nil4commented, Sep 3, 2020

@coderpatros happy to report that the issue is resolved with v0.4.0! 👍

Running cyclonedx-py on a test project with a single requirement (elasticsearch==7.1.0) now outputs:

> cyclonedx-py
Input file: requirements.txt
Output BOM: bom.xml
JSON output: False
Package info url:{package_name}/{package_version}/json
Generating CycloneDX BOM
WARNING: could not retrieve package info for elasticsearch
Validating BOM

The warning displayed appears harmless, as the following BOM is produced:

<?xml version="1.0" encoding="UTF-8"?>
<bom xmlns="" version="1">
        <component type="library">

Thank you very much for identifying and releasing the fix so quickly!

Read more comments on GitHub >

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