To parameterize the level of fingerprint validation. So negative validity (fingerprint not known at server) may be treated as an error (ArtifactBroken).

jenkinshelper.py

import os, logging
from jenkinsapi.fingerprint import Fingerprint
from jenkinsapi.custom_exceptions import ArtifactBroken

__all__ = ['save_artifact', 'save_artifact_to_dir']

_log = logging.getLogger(__name__)

def save_artifact(artifact, fspath, strict_validation=False):
    if os.path.exists(fspath):
        try:
            _validate_local_copy(artifact, fspath, strict_validation)
        except ArtifactBroken:
            _log.warning('Local copy [%s] is invalid, remove it.', fspath)
            os.remove(fspath)

    return _validate_local_copy(artifact, artifact.save(fspath), strict_validation)

def save_artifact_to_dir(artifact, dirpath, strict_validation=False):
    fspath = os.path.join(dirpath, artifact.filename)
    return save_artifact(artifact, fspath, strict_validation)

def _validate_local_copy(artifact, fspath, strict):
    local_md5 = artifact._md5sum(fspath)
    baseurl = artifact.build.job.jenkins.baseurl
    job_name = artifact.build.job.name
    buildno = artifact.build.buildno

    fp = Fingerprint(baseurl, local_md5, artifact.build.job.jenkins)
    valid = fp.validate_for_build(os.path.basename(fspath), job_name, buildno)

    if not valid or (fp.unknown and strict): # strict = 404 as invalid
        raise ArtifactBroken("Artifact %s seems to be broken, check %s" % (local_md5, baseurl))
    return fspath