29 lines
1.3 KiB
Python
29 lines
1.3 KiB
Python
from image.docker import ManifestException
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from image.docker.schema1 import DockerSchema1Manifest, DOCKER_SCHEMA1_CONTENT_TYPES
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from image.docker.schema2 import (DOCKER_SCHEMA2_MANIFEST_CONTENT_TYPE,
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DOCKER_SCHEMA2_MANIFESTLIST_CONTENT_TYPE)
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from image.docker.schema2.manifest import DockerSchema2Manifest
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from image.docker.schema2.list import DockerSchema2ManifestList
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def parse_manifest_from_bytes(manifest_bytes, media_type, validate=True):
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""" Parses and returns a manifest from the given bytes, for the given media type.
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Raises a ManifestException if the parse fails for some reason.
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"""
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# NOTE: Docker sometimes pushed manifests encoded as utf-8, so decode them
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# if we can. Otherwise, treat the string as already unicode encoded.
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try:
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manifest_bytes = manifest_bytes.decode('utf-8')
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except:
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pass
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if media_type == DOCKER_SCHEMA2_MANIFEST_CONTENT_TYPE:
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return DockerSchema2Manifest(manifest_bytes)
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if media_type == DOCKER_SCHEMA2_MANIFESTLIST_CONTENT_TYPE:
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return DockerSchema2ManifestList(manifest_bytes)
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if media_type in DOCKER_SCHEMA1_CONTENT_TYPES:
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return DockerSchema1Manifest(manifest_bytes, validate=validate)
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raise ManifestException('Unknown or unsupported manifest media type `%s`' % media_type)
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