images: add bytelimit

- guild.emoji: add 128x128 limit and 128kb limit
 - types: add KILOBYTES

litecord/blueprints/guild/emoji.py

@@ -4,6 +4,7 @@ from litecord.auth import token_check
 from litecord.blueprints.checks import guild_check, guild_perm_check
 from litecord.schemas import validate, NEW_EMOJI, PATCH_EMOJI
 from litecord.snowflake import get_snowflake
+from litecord.types import KILOBYTES
 
 bp = Blueprint('guild.emoji', __name__)
 
@@ -45,7 +46,12 @@ async def _put_emoji(guild_id):
 
     emoji_id = get_snowflake()
 
-    icon = await app.icons.put('emoji', emoji_id, j['image'])
+    icon = await app.icons.put(
+        'emoji', emoji_id, j['image'],
+
+        # limits to emojis
+        bsize=128 * KILOBYTES, size=(128, 128)
+    )
 
     await app.db.execute(
         """

litecord/images.py

@@ -213,6 +213,10 @@ class IconManager:
         # get an extension for the given data uri
         extension = _get_ext(mime)
 
+        if 'bsize' in kwargs:
+            if len(raw_data) > kwargs['bsize']:
+                return Icon(None, None, '')
+
         if 'size' in kwargs:
             image = Image.open(data_fd)
 

litecord/types.py

@@ -1,3 +1,5 @@
+KILOBYTES = 1024
+
 
 class Color:
     """Custom color class"""