新增文件类型判断

backend/tools/common_tools.py

@@ -0,0 +1,32 @@
+import os
+
+video_extensions = {
+    '.mp4', '.m4a', '.m4v', '.f4v', '.f4a', '.m4b', '.m4r', '.f4b', '.mov',
+    '.3gp', '.3gp2', '.3g2', '.3gpp', '.3gpp2', '.ogg', '.oga', '.ogv', '.ogx',
+    '.wmv', '.wma', '.asf', '.webm', '.flv', '.avi', '.gifv', '.mkv', '.rm',
+    '.rmvb', '.vob', '.dvd', '.mpg', '.mpeg', '.mp2', '.mpe', '.mpv', '.mpg',
+    '.mpeg', '.m2v', '.svi', '.3gp', '.mxf', '.roq', '.nsv', '.flv', '.f4v',
+    '.f4p', '.f4a', '.f4b'
+}
+
+image_extensions = {
+    '.jpg', '.jpeg', '.jpe', '.jif', '.jfif', '.jfi', '.png', '.gif',
+    '.webp', '.tiff', '.tif', '.psd', '.raw', '.arw', '.cr2', '.nrw',
+    '.k25', '.bmp', '.dib', '.heif', '.heic', '.ind', '.indd', '.indt',
+    '.jp2', '.j2k', '.jpf', '.jpx', '.jpm', '.mj2', '.svg', '.svgz',
+    '.ai', '.eps', '.ico'
+}
+
+
+def is_video_file(filename):
+    return os.path.splitext(filename)[-1].lower() in video_extensions
+
+
+def is_image_file(filename):
+    return os.path.splitext(filename)[-1].lower() in image_extensions
+
+
+def is_video_or_image(filename):
+    file_extension = os.path.splitext(filename)[-1].lower()
+    # 检查扩展名是否在定义的视频或图片文件后缀集合中
+    return file_extension in video_extensions or file_extension in image_extensions