finish implementing torrent verb

util/registry/torrent.py

@@ -1,5 +1,34 @@
+import time
+import hashlib
+
+import bencode
 import resumablehashlib
 
+from app import app
+
+
+TRACKER_ANNOUNCE_URL = app.config.get('BT_TRACKER_ANNOUNCE_URL')
+NAMING_SALT = app.config.get('BT_NAMING_SALT')
+
+def private_torrent_name(user_uuid, blob_uuid):
+  return hashlib.sha256(blob_uuid + user_uuid + NAMING_SALT).hexdigest()
+
+
+def make_torrent(name, webseed, length, piece_length, pieces):
+  return bencode.bencode({
+    'announce': TRACKER_ANNOUNCE_URL,
+    'url-list': webseed,
+    'encoding': 'UTF-8',
+    'created by': 'Quay Container Registry',
+    'creation date': int(time.time()),
+    'info': {
+      'name': name,
+      'length': length,
+      'piece length': piece_length,
+      'pieces': pieces,
+    },
+  })
+
 
 class PieceHasher(object):
   def __init__(self, piece_size, starting_offset, starting_piece_hash_bytes, hash_fragment_to_resume):