def _save_content_artifact(self, download_result, content_artifact):
"""
Create/Get an Artifact and associate it to a ContentArtifact.
Create (or get if already existing) an :class:`~pulpcore.plugin.models.Artifact`
based on the `download_result` and associate it to the given `content_artifact`. Both
the created artifact and the updated content_artifact are saved to the DB.
Plugin-writers may overide this method if their content module requires
additional/different steps for saving.
Args:
download_result (:class:`~pulpcore.plugin.download.DownloadResult`: The
DownloadResult for the downloaded artifact.
content_artifact (:class:`~pulpcore.plugin.models.ContentArtifact`): The
ContentArtifact to associate the Artifact with.
Returns:
The associated :class:`~pulpcore.plugin.models.Artifact`.
"""
artifact = Artifact(
**download_result.artifact_attributes,
file=download_result.path
)
with transaction.atomic():
try:
with transaction.atomic():
artifact.save()
except IntegrityError:
artifact = Artifact.objects.get(artifact.q())
content_artifact.artifact = artifact
content_artifact.save()
return artifact
async def _stream_content_artifact(self, request, response,
content_artifact):
"""
Stream and optionally save a ContentArtifact by requesting it using the associated remote.
Args:
request(:class:`~aiohttp.web.Request`): The request to prepare a response for.
response (:class:`~aiohttp.web.StreamResponse`): The response to stream data to.
content_artifact (:class:`~pulpcore.plugin.models.ContentArtifact`): The ContentArtifact
to fetch and then stream back to the client
"""
remote_artifact = content_artifact.remoteartifact_set.get()
remote = remote_artifact.remote.cast()
async def handle_headers(headers):
for name, value in headers.items():
if name.lower() in HOP_BY_HOP_HEADERS:
continue
response.headers[name] = value
await response.prepare(request)
async def handle_data(data):
await response.write(data)
if remote.policy != Remote.STREAMED:
await original_handle_data(data)
async def finalize():
if remote.policy != Remote.STREAMED:
await original_finalize()
downloader = remote.get_downloader(
remote_artifact=remote_artifact,
headers_ready_callback=handle_headers)
original_handle_data = downloader.handle_data
downloader.handle_data = handle_data
original_finalize = downloader.finalize
downloader.finalize = finalize
download_result = await downloader.run()
if remote.policy != Remote.STREAMED:
with transaction.atomic():
new_artifact = Artifact(**download_result.artifact_attributes,
file=download_result.path)
new_artifact.save()
content_artifact.artifact = new_artifact
content_artifact.save()
await response.write_eof()
return response
def _save_artifact(self, download_result, remote_artifact):
"""
Create/Get an Artifact and associate it to a RemoteArtifact and/or ContentArtifact.
Create (or get if already existing) an :class:`~pulpcore.plugin.models.Artifact`
based on the `download_result` and associate it to the `content_artifact` of the given
`remote_artifact`. Both the created artifact and the updated content_artifact are saved to
the DB. The `remote_artifact` is also saved for the pull-through caching use case.
Plugin-writers may overide this method if their content module requires
additional/different steps for saving.
Args:
download_result (:class:`~pulpcore.plugin.download.DownloadResult`: The
DownloadResult for the downloaded artifact.
remote_artifact (:class:`~pulpcore.plugin.models.RemoteArtifact`): The
RemoteArtifact to associate the Artifact with.
Returns:
The associated :class:`~pulpcore.plugin.models.Artifact`.
"""
content_artifact = remote_artifact.content_artifact
remote = remote_artifact.remote
artifact = Artifact(**download_result.artifact_attributes, file=download_result.path)
with transaction.atomic():
try:
with transaction.atomic():
artifact.save()
except IntegrityError:
artifact = Artifact.objects.get(artifact.q())
update_content_artifact = True
if content_artifact._state.adding:
# This is the first time pull-through content was requested.
rel_path = content_artifact.relative_path
c_type = remote.get_remote_artifact_content_type(rel_path)
content = c_type.init_from_artifact_and_relative_path(artifact, rel_path)
try:
with transaction.atomic():
content.save()
content_artifact.content = content
content_artifact.save()
except IntegrityError:
# There is already content for this Artifact
content = c_type.objects.get(content.q())
artifacts = content._artifacts
if artifact.sha256 != artifacts[0].sha256:
raise RuntimeError(
"The Artifact downloaded during pull-through does not "
"match the Artifact already stored for the same "
"content."
)
content_artifact = ContentArtifact.objects.get(content=content)
update_content_artifact = False
try:
with transaction.atomic():
remote_artifact.content_artifact = content_artifact
remote_artifact.save()
except IntegrityError:
# Remote artifact must have already gotten saved during a parallel request
log.info("RemoteArtifact already exists.")
if update_content_artifact:
content_artifact.artifact = artifact
content_artifact.save()
return artifact