fix: Copy bodies before sending them over.

send_file in flask close the BytesIO, causing issue if we need to
re-access it.

lookyloo/lookyloo.py

@@ -607,7 +607,7 @@ class Lookyloo():
             return None
         if not h or h == url.body_hash:
             # we want the body
-            return url.filename if url.filename else 'file.bin', url.body, url.mimetype
+            return url.filename if url.filename else 'file.bin', BytesIO(url.body.getvalue()), url.mimetype
 
         # We want an embedded ressource
         if h not in url.resources_hashes:
@@ -615,7 +615,7 @@ class Lookyloo():
         for mimetype, blobs in url.embedded_ressources.items():
             for ressource_h, blob in blobs:
                 if ressource_h == h:
-                    return 'embedded_ressource.bin', blob, mimetype
+                    return 'embedded_ressource.bin', BytesIO(blob.getvalue()), mimetype
         return None
 
     def __misp_add_vt_to_URLObject(self, obj: MISPObject) -> Optional[MISPObject]:

website/web/__init__.py

@@ -1000,7 +1000,6 @@ def get_ressource(tree_uuid: str, node_uuid: str):
         to_return = BytesIO(b'Unknown Hash')
         filename = 'file.txt'
         mimetype = 'text/text'
-    to_return.seek(0)
     return send_file(to_return, mimetype=mimetype, as_attachment=True, attachment_filename=filename)