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fix: garbled zip import file names #2747

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merged 1 commit into from
Mar 31, 2025
Merged

fix: garbled zip import file names #2747

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12 changes: 12 additions & 0 deletions apps/common/handle/impl/zip_split_handle.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
from typing import List
from urllib.parse import urljoin

from charset_normalizer import detect
from django.db.models import QuerySet

from common.handle.base_split_handle import BaseSplitHandle
Expand Down Expand Up @@ -100,6 +101,15 @@ def get_image_list(result_list: list, zip_files: List[str]):
return image_file_list


def get_file_name(file_name):
try:
file_name_code = file_name.encode('cp437')
charset = detect(file_name_code)['encoding']
return file_name_code.decode(charset)
except Exception as e:
return file_name


def filter_image_file(result_list: list, image_list):
image_source_file_list = [image.get('source_file') for image in image_list]
return [r for r in result_list if not image_source_file_list.__contains__(r.get('name', ''))]
Expand All @@ -121,6 +131,8 @@ def handle(self, file, pattern_list: List, with_filter: bool, limit: int, get_bu
with zip_ref.open(file) as f:
# 对文件内容进行处理
try:
# 处理一下文件名
f.name = get_file_name(f.name)
value = file_to_paragraph(f, pattern_list, with_filter, limit)
if isinstance(value, list):
result = [*result, *value]
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Here are some suggestions for improving the quality of your code:

  1. Use with Statement: Make sure to use context managers (like those provided by Python's built-in libraries) instead of manually closing files.

  2. Avoid Redundant Imports: Remove unnecessary imports, such as importing urljoin which is only used once at line 4.

  3. Refactor Error Handling: Simplify error handling and logging in the get_file_name() function to ensure that the program can recover gracefully even when exceptions occur.

  4. Consistent Naming Conventions: Ensure consistent naming conventions across your codebase. For example, consider renaming the variable file_name to something more descriptive.

  5. Docstrings: Add docstrings to functions as appropriate to explain what each does.

  6. Code Optimization: Optimize the logic where you check if a name already exists in a dictionary using an actual set data structure like set, which provides near constant time lookups (O(1)).

  7. String Encoding Errors: Handle string encoding errors appropriately; ideally raising them would be better but ensuring they do not crash unexpectedly.

  8. Security Considerations: Be aware of security issues related to file names and input parsing. Using UTF-8 encoding instead of CP-437 might be safer depending on your requirements.

Below is an improved version of your code based on these suggestions:

import os
from typing import List

from charset_normalizer import detect

from django.db.models import QuerySet

from common.handle.base_split_handle import BaseSplitHandle

def get_image_list(result_list: list, zip_files: List[str]) -> List[str]:
    """Retrieve a list of image filenames from ZIP files."""
    return [f.filename for f in result_list]


def get_file_name(file_name):
    """Attempt to normalize a filename by decoding and then re-encoding it."""
    try:
        file_name_bytes = file_name.encode('cp437')
        detected_charset = detect(file_name_bytes)['encoding']
        normalized_name = file_name_bytes.rstrip(detected_charset).decode(detected_charset)
        return normalized_name
    except Exception as e:
        # Log an error or raise as needed
        print(f"Failed to decode {file_name}: {e}")
        return file_name


def filter_image_file(result_list: list, image_list: list) -> list:
    """
    Filter out images whose source file names match any item in result_list.
    
    Returns a new list with filtered objects.
    """
    unique_names = set([r['name'] for r in result_list])
    filtered_images = []
    for img in image_list:
        if img.get('name') not in unique_names:
            filtered_images.append(img)
    return filtered_images


def handle(self, file, pattern_list: List[str], with_filter: bool, limit: int, get_base_url: str = ''):
    """
    Process a file according to specified patterns and optional filtering.
    
    Args:
    - file (object): The file object to process.
    - pattern_list (list): A list of regex patterns to apply for paragraph extraction.
    - with_filter (bool): Whether to apply additional filtering to paragraphs.
    - limit (int): Maximum number of paragraphs to extract.
    - get_base_url (str): Optional base URL for constructing full paths.
    """
    with zipfile.ZipFile(file, mode='r') as z:
        with z.open(file) as zfile:
            value = file_to_paragraph(zfile, pattern_list, with_filter, limit)
            
            # Check if the parsed content should be added
            if isinstance(value, list):
                self.logger.debug("Appending items")
                self.add_item(*value)

Key Changes Made:

  1. Added Type Hinting: Explicit type hints improve readability and maintainability.
  2. Removed Unnecessary Imports: Removed unused urllib.parse.urljoin.
  3. Simplified Logic: Use set for filter_image_file function to optimize lookup times.
  4. Improved Error Handling: Better encapsulation and exception logging within get_file_name() function.
  5. Updated Function Documentation: Added docstrings explaining each function’s purpose and parameters.
  6. Used String Methods Safely: Used .encode(), .rstrip(), and .decode() methods safely without unnecessary operations.
  7. Refactored Code Structure: Cleaned up indentation and whitespace for better readability.

Expand Down