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ImportHelper.py
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173 lines (149 loc) · 5.33 KB
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from __future__ import annotations
import io
import os
from gzip import GzipFile
from typing import BinaryIO, List, Optional, Tuple, Union
from .. import files
from ..enums import FileType
from ..streams import EndianBinaryReader
from .CompressionHelper import BROTLI_MAGIC, GZIP_MAGIC
FileSourceType = Union[str, bytes, bytearray, io.IOBase, EndianBinaryReader, BinaryIO]
def file_name_without_extension(file_name: str) -> str:
return os.path.join(os.path.dirname(file_name), os.path.splitext(os.path.basename(file_name))[0])
def list_all_files(directory: str) -> List[str]:
return [
val
for sublist in [
[os.path.join(dir_path, filename) for filename in filenames]
for (dir_path, dirnames, filenames) in os.walk(directory)
if ".git" not in dir_path
]
for val in sublist
]
def find_all_files(directory: str, search_str: str) -> List[str]:
return [
val
for sublist in [
[os.path.join(dir_path, filename) for filename in filenames if search_str in filename]
for (dir_path, dirnames, filenames) in os.walk(directory)
if ".git" not in dir_path
]
for val in sublist
]
def check_file_type(
input_: FileSourceType,
) -> Tuple[FileType, EndianBinaryReader]:
if isinstance(input_, str) and os.path.isfile(input_):
reader = EndianBinaryReader(open(input_, "rb"))
elif isinstance(input_, EndianBinaryReader):
reader = input_
else:
reader = EndianBinaryReader(input_)
if reader.Length < 20:
return FileType.ResourceFile, reader
signature = reader.read_string_to_null(20)
reader.Position = 0
if signature in [
"UnityWeb",
"UnityRaw",
"\xfa\xfa\xfa\xfa\xfa\xfa\xfa\xfa",
"UnityFS",
]:
return FileType.BundleFile, reader
elif signature.startswith(("UnityWebData", "TuanjieWebData")):
return FileType.WebFile, reader
elif signature == "PK\x03\x04":
return FileType.ZIP, reader
else:
if reader.Length < 128:
return FileType.ResourceFile, reader
magic = bytes(reader.read_bytes(2))
reader.Position = 0
if GZIP_MAGIC == magic:
g_stream = GzipFile(fileobj=reader)
g_reader = EndianBinaryReader(g_stream, endian="<")
signature = g_reader.read_string_to_null(20)
g_stream.close()
if signature.startswith(("UnityWebData", "TuanjieWebData")):
return FileType.WebFile, reader
reader.Position = 0x20
magic = bytes(reader.read_bytes(6))
reader.Position = 0
if BROTLI_MAGIC == magic:
return FileType.WebFile, reader
# check if AssetsFile
old_endian = reader.endian
# read as if assetsfile and check version
# ReadHeader
reader.Position = 0
metadata_size = reader.read_u_int()
file_size = reader.read_u_int()
version = reader.read_u_int()
data_offset = reader.read_u_int()
if version >= 22:
raw_endian = reader.read_u_byte()
_endian = ">" if raw_endian else "<"
_reserved = reader.read_bytes(3)
metadata_size = reader.read_u_int()
file_size = reader.read_long()
data_offset = reader.read_long()
_unknown = reader.read_long() # unknown
# reset
reader.endian = old_endian
reader.Position = 0
# check info
if any(
(
version < 0,
version > 100,
*[x < 0 or x > reader.Length for x in [file_size, metadata_size, version, data_offset]],
file_size < metadata_size,
file_size < data_offset,
)
):
return FileType.ResourceFile, reader
else:
return FileType.AssetsFile, reader
def parse_file(
reader: EndianBinaryReader,
parent: files.File,
name: str,
typ: Optional[FileType] = None,
is_dependency: bool = False,
) -> Union[files.File, EndianBinaryReader]:
if typ is None:
typ, _ = check_file_type(reader)
f = reader
try:
if typ == FileType.AssetsFile and not name.endswith(
(
".resS",
".resource",
".config",
".xml",
".dat",
)
):
f = files.SerializedFile(reader, parent, name=name, is_dependency=is_dependency)
elif typ == FileType.BundleFile:
f = files.BundleFile(reader, parent, name=name, is_dependency=is_dependency)
elif typ == FileType.WebFile:
f = files.WebFile(reader, parent, name=name, is_dependency=is_dependency)
except Exception as e:
reader.seek(0)
print(f"Error parsing file {name!r} as {typ}: {e}")
raise e
return f
def find_sensitive_path(dir: str, insensitive_path: str) -> Union[str, None]:
parts = os.path.split(insensitive_path.strip(os.path.sep))
sensitive_path = dir
for part in parts:
part_lower = part.lower()
part = next(
(name for name in os.listdir(sensitive_path) if name.lower() == part_lower),
None,
)
if part is None:
return None
sensitive_path = os.path.join(sensitive_path, part)
return sensitive_path