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[models] Add tentative support for new file manifest fields

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Why on earth would anybody want MD5 hashes?
This commit is contained in:
derrod 2021-10-29 14:04:17 +02:00
parent b27879f21f
commit eacb8eb006
1 changed files with 21 additions and 2 deletions
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23
legendary/models/manifest.py
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@ -522,6 +522,21 @@ class FML:
logger.warning(f'Did not read {diff} bytes from chunk part!')
bio.seek(diff)
# MD5 hash + MIME type
if _fml.version >= 1:
for fm in _fml.elements:
_has_md5 = struct.unpack('<I', bio.read(4))[0]
if _has_md5 != 0:
fm.hash_md5 = bio.read(16)
for fm in _fml.elements:
fm.mime_type = read_fstring(bio)
# SHA256 hash
if _fml.version >= 2:
for fm in _fml.elements:
fm.hash_sha256 = bio.read(32)
# we have to calculate the actual file size ourselves
for fm in _fml.elements:
fm.file_size = sum(c.size for c in fm.chunk_parts)
@ -531,14 +546,15 @@ class FML:
f'{_fml.size - size_read} bytes missing, skipping...')
bio.seek(_fml.size - size_read, 1)
# downgrade version to prevent issues during serialisation
_fml.version = 1
_fml.version = 2
return _fml
def write(self, bio):
fml_start = bio.tell()
bio.write(struct.pack('<I', 0)) # placeholder size
bio.write(struct.pack('B', self.version))
# currently we only serialise version 0
bio.write(struct.pack('B', 0))
bio.write(struct.pack('<I', len(self.elements)))
for fm in self.elements:
@ -579,6 +595,9 @@ class FileManifest:
self.install_tags = []
self.chunk_parts = []
self.file_size = 0
self.hash_md5 = b''
self.mime_type = ''
self.hash_sha256 = b''
@property
def read_only(self):