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[models] Make manifest deserializer skip unknown data instead of failing

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derrod 2021-10-29 14:19:52 +02:00
parent eacb8eb006
commit 3145fdb534
1 changed files with 24 additions and 12 deletions
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36
legendary/models/manifest.py
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@ -118,10 +118,10 @@ class Manifest:
_manifest.version = struct.unpack('<I', bio.read(4))[0]
if bio.tell() != _manifest.header_size:
logger.fatal(f'Did not read entire header {bio.tell()} != {_manifest.header_size}! '
f'Header version: {_manifest.version}, please report this on '
f'GitHub along with a sample of the problematic manifest!')
raise ValueError('Did not read complete manifest header!')
logger.warning(f'Did not read entire header {bio.tell()} != {_manifest.header_size}! '
f'Header version: {_manifest.version}, please report this on '
f'GitHub along with a sample of the problematic manifest!')
bio.seek(_manifest.header_size)
data = bio.read()
if _manifest.compressed:
@ -234,8 +234,12 @@ class ManifestMeta:
if _meta.data_version > 0:
_meta._build_id = read_fstring(bio)
if bio.tell() != _meta.meta_size:
raise ValueError('Did not read entire meta!')
if (size_read := bio.tell()) != _meta.meta_size:
logger.warning(f'Did not read entire manifest metadata! Version: {_meta.data_version}, '
f'{_meta.meta_size - size_read} bytes missing, skipping...')
bio.seek(_meta.meta_size - size_read, 1)
# downgrade version to prevent issues during serialisation
_meta.data_version = 0
return _meta
@ -366,8 +370,12 @@ class CDL:
for chunk in _cdl.elements:
chunk.file_size = struct.unpack('<q', bio.read(8))[0]
if bio.tell() - cdl_start != _cdl.size:
raise ValueError('Did not read entire chunk data list!')
if (size_read := bio.tell() - cdl_start) != _cdl.size:
logger.warning(f'Did not read entire chunk data list! Version: {_cdl.version}, '
f'{_cdl.size - size_read} bytes missing, skipping...')
bio.seek(_cdl.size - size_read, 1)
# downgrade version to prevent issues during serialisation
_cdl.version = 0
return _cdl
@ -546,7 +554,7 @@ 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 = 2
_fml.version = 0
return _fml
@ -554,7 +562,7 @@ class FML:
fml_start = bio.tell()
bio.write(struct.pack('<I', 0)) # placeholder size
# currently we only serialise version 0
bio.write(struct.pack('B', 0))
bio.write(struct.pack('B', 0)) # self.version
bio.write(struct.pack('<I', len(self.elements)))
for fm in self.elements:
@ -704,8 +712,12 @@ class CustomFields:
_cf._dict = dict(zip(_keys, _values))
if bio.tell() - cf_start != _cf.size:
raise ValueError('Did not read entire custom fields list!')
if (size_read := bio.tell() - cf_start) != _cf.size:
logger.warning(f'Did not read entire custom fields part! Version: {_cf.version}, '
f'{_cf.size - size_read} bytes missing, skipping...')
bio.seek(_cf.size - size_read, 1)
# downgrade version to prevent issues during serialisation
_cf.version = 0
return _cf