feat: 重构配置管理，集中管理环境变量并优化存储后端实现

app.py

@@ -1,14 +1,15 @@
-import os
 import tomllib
 from pathlib import Path
 
-import dotenv
 from flask import Flask
 
+import utils
+from config import Config
 from handlers.routes import main_route
 from storages.factory import StorageFactory
 
-dotenv.load_dotenv()
+# 验证配置
+Config.validate()
 
 
 # 从 pyproject.toml 读取版本号
@@ -34,73 +35,18 @@ app.register_blueprint(main_route)
 # 初始化存储（使用工厂模式）
 storage = StorageFactory.get_storage()
 
-# 缩略图默认 TTL（秒），可通过环境变量覆盖
-THUMB_TTL = int(os.environ.get("THUMB_TTL_SECONDS", "3600"))
 
-
-# 注册一个安全的 filesizeformat 过滤器，处理 None 和非数字值
+# 注册模板过滤器
 @app.template_filter("filesizeformat")
 def filesizeformat_filter(value):
-    try:
-        if value is None:
-            return "-"
-        num = float(value)  # 使用 float 而不是 int 以保持精度
-    except Exception:
-        return "-"
-
-    for unit in ["B", "KB", "MB", "GB", "TB"]:
-        if num < 1024:
-            # 对于字节，显示整数
-            if unit == "B":
-                return f"{int(num)}{unit}"
-            # 其他单位保留两位小数
-            return f"{num:.2f}{unit}"
-        num = num / 1024.0
-    return f"{num:.2f}PB"
+    """格式化文件大小"""
+    return utils.format_file_size(value)
 
 
-# 注册一个文件图标过滤器
 @app.template_filter("fileicon")
 def fileicon_filter(filename):
-    if not filename:
-        return "fas fa-file"
-
-    ext = filename.lower().split(".")[-1] if "." in filename else ""
-
-    # 图片文件
-    if ext in ["jpg", "jpeg", "png", "gif", "bmp", "webp", "svg"]:
-        return "fas fa-image"
-
-    # 音频文件
-    if ext in ["mp3", "wav", "ogg", "flac", "m4a", "aac"]:
-        return "fas fa-music"
-
-    # 视频文件
-    if ext in ["mp4", "webm", "avi", "mov", "wmv", "flv", "mkv"]:
-        return "fas fa-video"
-
-    # 文档文件
-    if ext in ["pdf", "doc", "docx", "txt", "md", "rtf"]:
-        return "fas fa-file-alt"
-
-    # 压缩文件
-    if ext in ["zip", "rar", "7z", "tar", "gz"]:
-        return "fas fa-file-archive"
-
-    # 代码文件
-    if ext in ["py", "js", "html", "css", "java", "cpp", "c", "php"]:
-        return "fas fa-file-code"
-
-    # 表格文件
-    if ext in ["xls", "xlsx", "csv"]:
-        return "fas fa-file-excel"
-
-    # 演示文件
-    if ext in ["ppt", "pptx"]:
-        return "fas fa-file-powerpoint"
-
-    # 默认文件图标
-    return "fas fa-file"
+    """获取文件图标"""
+    return utils.get_file_icon(filename)
 
 
 def get_public_url(key: str) -> str:
@@ -135,6 +81,4 @@ def inject_version():
 
 
 if __name__ == "__main__":
-    port = int(os.environ.get("PORT", 5000))
-    host = os.environ.get("HOST", "0.0.0.0")
-    app.run(host=host, port=port, debug=True)
+    app.run(host=Config.HOST, port=Config.PORT, debug=Config.DEBUG)