Daniel Bedeleanu
ea49cd6e4a
- Create backend/services/image_storage.py with 4 core functions:
- sanitize_filename(): remove unsafe chars, limit to 255 chars, convert to lowercase
- get_unique_filename(): handle collisions with UUID suffix (format: {name}_{uuid8}_{variant}.jpg)
- ensure_image_directories(): create /images/ root and category subdirs on startup
- save_image(): save bytes to /images/{category}/{filename}, returns relative path
- Create comprehensive test suite (22 tests) covering all functionality
- Integrate ensure_image_directories() into FastAPI startup event
- Directory structure: /images/{category}/{filename}
- Collision handling: auto-suffix with UUID if filename exists
- All tests passing, pathlib.Path for safe operations
123 lines
3.4 KiB
Python
123 lines
3.4 KiB
Python
import codecs
|
|
import re
|
|
from typing import Any, Optional, Tuple
|
|
|
|
from .core import IDNAError, alabel, decode, encode, ulabel
|
|
|
|
_unicode_dots_re = re.compile("[\u002e\u3002\uff0e\uff61]")
|
|
|
|
|
|
class Codec(codecs.Codec):
|
|
def encode(self, data: str, errors: str = "strict") -> Tuple[bytes, int]:
|
|
if errors != "strict":
|
|
raise IDNAError('Unsupported error handling "{}"'.format(errors))
|
|
|
|
if not data:
|
|
return b"", 0
|
|
|
|
return encode(data), len(data)
|
|
|
|
def decode(self, data: bytes, errors: str = "strict") -> Tuple[str, int]:
|
|
if errors != "strict":
|
|
raise IDNAError('Unsupported error handling "{}"'.format(errors))
|
|
|
|
if not data:
|
|
return "", 0
|
|
|
|
return decode(data), len(data)
|
|
|
|
|
|
class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
|
|
def _buffer_encode(self, data: str, errors: str, final: bool) -> Tuple[bytes, int]:
|
|
if errors != "strict":
|
|
raise IDNAError('Unsupported error handling "{}"'.format(errors))
|
|
|
|
if not data:
|
|
return b"", 0
|
|
|
|
labels = _unicode_dots_re.split(data)
|
|
trailing_dot = b""
|
|
if labels:
|
|
if not labels[-1]:
|
|
trailing_dot = b"."
|
|
del labels[-1]
|
|
elif not final:
|
|
# Keep potentially unfinished label until the next call
|
|
del labels[-1]
|
|
if labels:
|
|
trailing_dot = b"."
|
|
|
|
result = []
|
|
size = 0
|
|
for label in labels:
|
|
result.append(alabel(label))
|
|
if size:
|
|
size += 1
|
|
size += len(label)
|
|
|
|
# Join with U+002E
|
|
result_bytes = b".".join(result) + trailing_dot
|
|
size += len(trailing_dot)
|
|
return result_bytes, size
|
|
|
|
|
|
class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
|
|
def _buffer_decode(self, data: Any, errors: str, final: bool) -> Tuple[str, int]:
|
|
if errors != "strict":
|
|
raise IDNAError('Unsupported error handling "{}"'.format(errors))
|
|
|
|
if not data:
|
|
return ("", 0)
|
|
|
|
if not isinstance(data, str):
|
|
data = str(data, "ascii")
|
|
|
|
labels = _unicode_dots_re.split(data)
|
|
trailing_dot = ""
|
|
if labels:
|
|
if not labels[-1]:
|
|
trailing_dot = "."
|
|
del labels[-1]
|
|
elif not final:
|
|
# Keep potentially unfinished label until the next call
|
|
del labels[-1]
|
|
if labels:
|
|
trailing_dot = "."
|
|
|
|
result = []
|
|
size = 0
|
|
for label in labels:
|
|
result.append(ulabel(label))
|
|
if size:
|
|
size += 1
|
|
size += len(label)
|
|
|
|
result_str = ".".join(result) + trailing_dot
|
|
size += len(trailing_dot)
|
|
return (result_str, size)
|
|
|
|
|
|
class StreamWriter(Codec, codecs.StreamWriter):
|
|
pass
|
|
|
|
|
|
class StreamReader(Codec, codecs.StreamReader):
|
|
pass
|
|
|
|
|
|
def search_function(name: str) -> Optional[codecs.CodecInfo]:
|
|
if name != "idna2008":
|
|
return None
|
|
return codecs.CodecInfo(
|
|
name=name,
|
|
encode=Codec().encode,
|
|
decode=Codec().decode, # type: ignore
|
|
incrementalencoder=IncrementalEncoder,
|
|
incrementaldecoder=IncrementalDecoder,
|
|
streamwriter=StreamWriter,
|
|
streamreader=StreamReader,
|
|
)
|
|
|
|
|
|
codecs.register(search_function)
|