diff --git a/appPublic/base64_to_file.py b/appPublic/base64_to_file.py
new file mode 100644
index 0000000..c2d80e9
--- /dev/null
+++ b/appPublic/base64_to_file.py
@@ -0,0 +1,60 @@
+import os
+import re
+import base64
+from appPublic.uniqueID import getID
+
+MIME_EXT = {
+	# 图片
+	"image/jpeg": "jpg",
+	"image/png": "png",
+	"image/gif": "gif",
+	"image/webp": "webp",
+	"image/bmp": "bmp",
+	"image/svg+xml": "svg",
+	"image/x-icon": "ico",
+	"image/tiff": "tiff",
+
+	# 音频
+	"audio/mpeg": "mp3",
+	"audio/wav": "wav",
+	"audio/ogg": "ogg",
+	"audio/webm": "weba",
+	"audio/aac": "aac",
+	"audio/flac": "flac",
+	"audio/mp4": "m4a",
+	"audio/3gpp": "3gp",
+
+	# 视频
+	"video/mp4": "mp4",
+	"video/webm": "webm",
+	"video/ogg": "ogv",
+	"video/x-msvideo": "avi",
+	"video/quicktime": "mov",
+	"video/x-matroska": "mkv",
+	"video/3gpp": "3gp",
+	"video/x-flv": "flv",
+}
+
+def getFilenameFromBase64(base64String):
+	match = re.match(r"data:(.*?);base64,(.*)", base64String)
+	if not match:
+		raise ValueError("不是合法的 base64 Data URL")
+	mime_type, b64_data = match.groups()
+	ext = MIME_EXT.get(mime_type, mime_type.split("/")[-1])
+	name = getID()
+	fname = f'{name}.{ext}'
+	return fname
+
+def base64_to_file(base64_string, output_path):
+	# Remove data URL prefix if present (e.g., "data:image/png;base64,")
+	if ',' in base64_string:
+		header, base64_data = base64_string.split(',', 1)
+	else:
+		base64_data = base64_string
+
+	# Decode Base64 string
+	binary_data = base64.b64decode(base64_data)
+	
+	# Write binary data to file
+	with open(output_path, 'wb') as file:
+		file.write(binary_data)
diff --git a/appPublic/folderUtils.py b/appPublic/folderUtils.py
index 38197f5..806bd68 100755
--- a/appPublic/folderUtils.py
+++ b/appPublic/folderUtils.py
@@ -48,22 +48,22 @@ def timestamp2datatiemStr(ts):
 	
 """
 def findAllDrives():
-    Drives=[]
-    # print "Searching for drives..."
-    drives=win32api.GetLogicalDriveStrings().split(":")
-    for i in drives:
-        # print "i=",i,":"
-        dr=i[-1].lower()
-        if dr.isalpha():
-            dr+=":\\"
-            inf=None
-            try:
-                inf=win32api.GetVolumeInformation(dr)
-            except:
-                pass # Removable drive, not ready
-		     # You'll still get the drive letter, but inf will be None
-            Drives.append([dr,inf])
-    return Drives
+	Drives=[]
+	# print "Searching for drives..."
+	drives=win32api.GetLogicalDriveStrings().split(":")
+	for i in drives:
+		# print "i=",i,":"
+		dr=i[-1].lower()
+		if dr.isalpha():
+			dr+=":\\"
+			inf=None
+			try:
+				inf=win32api.GetVolumeInformation(dr)
+			except:
+				pass # Removable drive, not ready
+			 # You'll still get the drive letter, but inf will be None
+			Drives.append([dr,inf])
+	return Drives
 """
 
 ## list all folder name under folder named by path
@@ -77,19 +77,19 @@ def listFolder(path, rescursive=False) :
 			yield full_name
 
 def listFile(folder,suffixs=[],rescursive=False):
-    subffixs = [ i.lower() for i in suffixs ]
-    for f in os.listdir(folder):
-        p = os.path.join(folder,f)
-        if rescursive and os.path.isdir(p):
-            for p1 in listFile(p,suffixs=suffixs,rescursive=True):
-	            yield p1
-        if os.path.isfile(p):
-            e = p.lower()
-            if suffixs == [] :
-                yield p
-            for s in subffixs:
-                if e.endswith(s):
-                    yield p
+	subffixs = [ i.lower() for i in suffixs ]
+	for f in os.listdir(folder):
+		p = os.path.join(folder,f)
+		if rescursive and os.path.isdir(p):
+			for p1 in listFile(p,suffixs=suffixs,rescursive=True):
+				yield p1
+		if os.path.isfile(p):
+			e = p.lower()
+			if suffixs == [] :
+				yield p
+			for s in subffixs:
+				if e.endswith(s):
+					yield p
 
 def folderInfo(root,uri=''):
 	relpath = uri
@@ -137,23 +137,12 @@ def rmdir_recursive(dir):
 	os.rmdir(dir)
 
 def _mkdir(newdir) :
-    """works the way a good mkdir should :)
-        - already exists, silently complete
-        - regular file in the way, raise an exception
-        - parent directory(ies) does not exist, make them as well
-    """
-    if os.path.isdir(newdir):
-        pass
-    elif os.path.isfile(newdir):
-        raise OSError("a file with the same name as the desired " \
-                      "dir, '%s', already exists." % newdir)
-    else:
-        head, tail = os.path.split(newdir)
-        if head and not os.path.isdir(head):
-            _mkdir(head)
-        #print "_mkdir %s" % repr(newdir)
-        if tail:
-            os.mkdir(newdir)
+	"""works the way a good mkdir should :)
+		- already exists, silently complete
+		- regular file in the way, raise an exception
+		- parent directory(ies) does not exist, make them as well
+	"""
+	return os.makedirs(newdir, exist_ok=True)
 
 def _copyfile(fp,dir) :
 	fs = open(fp,'rb')