Added 'info' function to get file or folder metadata

README.md

@@ -47,6 +47,9 @@ s3_fs.get('s3://csst-prod/gaia/test/requirements.txt', 'requirements.txt', s3_op
 # folder
 s3_fs.get('s3://csst-prod/gaia/data', './', recursive=True)
 s3_fs.get('s3://csst-prod/gaia/data', './', s3_options=s3_options, recursive=True)
+# get file or folder info
+s3_fs.info('s3://csst-prod/gaia/data')
+s3_fs.info('s3://csst-prod/gaia/test/requirements.txt', s3_options=s3_options)
 ```
 
 ## astropy直接读写s3的写法适配

csst_fs/s3_fs.py

@@ -7,4 +7,8 @@ def put(lpath, rpath, recursive=False, callback=fsspec.callbacks.DEFAULT_CALLBAC
 
 def get(rpath, lpath, recursive=False, callback=fsspec.callbacks.DEFAULT_CALLBACK, maxdepth=None, s3_options=load_s3_options(), **kwargs,):
     s3_fs = fsspec.filesystem('s3', **s3_options)
-    s3_fs.get(rpath, lpath, recursive, callback, maxdepth, **kwargs)
+    s3_fs.get(rpath, lpath, recursive, callback, maxdepth, **kwargs)
\ No newline at end of file
+
+def info(path, bucket=None, key=None, refresh=False, version_id=None, s3_options=load_s3_options()) -> dict:
+    s3_fs = fsspec.filesystem('s3', **s3_options)
+    return s3_fs.info(path, bucket, key, refresh, version_id)