diff --git a/README.md b/README.md
index 88b314c..4e4238e 100644
--- a/README.md
+++ b/README.md
@@ -56,9 +56,14 @@ output
 magnet:?xt=urn:btih:959E2ECEB954313D3869EFF7924CA7CD8DE739
 ```
 
-with multiple files
+with multiple files, folder
 ```bash
-python aria2_to_magnet.py *.aria2
+python3 aria2_to_magnet.py dahufa.aria2 dahufa.aria2 ./folder
+```
+
+reading aria2 files from folder recursively
+```bash
+python3 aria2_to_magnet.py ./ -r
 ```
 
 ## python2
diff --git a/aria2_to_magnet.py b/aria2_to_magnet.py
index a365237..a84fd0e 100644
--- a/aria2_to_magnet.py
+++ b/aria2_to_magnet.py
@@ -2,15 +2,20 @@
 import argparse
 import os
 import glob
-
 """
 Usage:
 command line
-python aria2_to_magnet.py -e .aria2 .
+windows: python aria2_to_magnet.py [path]|[-r --recursive]
+bash:    python3 aria2_to_magnet.py [path]|[-r --recursive]
+example: python aria2_to_magnet.py ./
 """
 
 
 def main():
+    file_parser(parse_aria_control_file)
+
+
+def file_parser(handler_func):
     # codes from gist
     # https://gist.github.com/89465127/5273149
     parser = argparse.ArgumentParser(
@@ -19,10 +24,18 @@ def main():
     parser.add_argument('path',
                         nargs='+',
                         help='Path of a file or a folder of files.')
+    # no need extension filter for aria2 file
     parser.add_argument('-e',
                         '--extension',
-                        default='',
+                        default='.aria2',
                         help='File extension to filter by.')
+
+    parser.add_argument('-r',
+                        '--recursive',
+                        action='store_true',
+                        default=False,
+                        help='Search through subfolders')
+
     args = parser.parse_args()
 
     # Parse paths
@@ -30,13 +43,18 @@ def main():
     files = set()
     for path in full_paths:
         if os.path.isfile(path):
-            files.add(path)
+            fileName, fileExt = os.path.splitext(path)
+            if args.extension == '' or args.extension == fileExt:
+                files.add(path)
         else:
-            files |= set(glob.glob(path + '/*' + args.extension))
+            if (args.recursive):
+                full_paths += glob.glob(path + '/*')
+            else:
+                files |= set(glob.glob(path + '/*' + args.extension))
 
     for f in files:
-        magnet = parse_aria_control_file(f)
-        print(f'file name: {os.path.basename(f)}, {magnet}')
+        handler_func(f)
+
 
 # ================================================================
 #  0                   1                   2                   3
@@ -67,24 +85,19 @@ def main():
 # more detail
 # https://aria2.github.io/manual/en/html/technical-notes.html
 # ================================================================
-
-
 def parse_aria_control_file(file_name):
-    with open(file_name, "rb") as f:
-        try:
-
-            f.seek(0)  # Go to beginning, read VER
-            version = f.read(2)
-
-            i = int.from_bytes(version, 'big')
-            # print("version is " + str(i))
+    try:
+        with open(file_name, "rb") as f:
+            # f.seek(0)  # Go to beginning, read VER
+            # version = f.read(2)
+            # i = int.from_bytes(version, 'big')
+            # print(f'version is {i}')
 
             # skip  EXT, find info  hash_binary length
             f.seek(6)
-
             length = f.read(4)
             hash_length = int.from_bytes(length, 'big')
-            # print "hash length is " + str(hash_length)
+            # print(f"hash length is {hash_length}")
 
             # read next hash_length
             f.seek(10)  # Go to info hash
@@ -92,17 +105,12 @@ def parse_aria_control_file(file_name):
             info_hash = hash_binary.hex().upper()
 
             magnet_link = "magnet:?xt=urn:btih:" + info_hash
-            return magnet_link
-        except:
-            pass
-        finally:
-            f.close()
+            print(f'file name: {os.path.basename(file_name)}, {magnet_link}')
+    except FileNotFoundError:
+        print(f'file not found. {file_name}')
 
 
 if __name__ == '__main__':
-    # file_list = args.file
-    # for file_name in file_list:
-    #     parse_aria_control_file(file_name)
     # version is 1
     # hash length is 20
     # magnet:?xt=urn:btih:959E2ECEB954313D38690EFF7924CA7CD80DE739