Added: CDStar.get_file with offset

pycdstar/cdstar.py

@@ -156,14 +156,15 @@ class CDStar:
                 break
 
     def put_file(self, vault, archive, name, source, type=None):
-        if not hasattr(source, "read"):
-            raise ValueError("Source must be a file-like object")
+        if isinstance(source, (str, os.PathLike)):
+            raise ValueError("Source must be a file-like object, byte string or iterator yielding byte strings.")
         return self._rest("PUT", vault, archive, _fix_filename(name), data=source,
                           headers={'Content-Type': type or "application/x-autodetect"}).json()
 
-    def get_file(self, vault, archive, name):
+    def get_file(self, vault, archive, name, offset=0):
         """ Return a stream-able response object representing the requested file. """
-        return self._rest("GET", vault, archive, _fix_filename(name), stream=True)
+        headers = {'Range': "bytes={}-".format(offset)} if offset > 0 else {}
+        return self._rest("GET", vault, archive, _fix_filename(name), stream=True, headers=headers)
 
     def get_fileinfo(self, vault, archive, name, meta=True):
         """ Get information about a file """