Websocket: send form field maxlengths

anonstream/static/anonstream.js

@@ -665,6 +665,11 @@ const on_websocket_message = async (event) => {
         info_button.dataset.visible = "";
       }
 
+      // form input maxlengths
+      chat_form_comment.maxLength = receipt.maxlength.comment;
+      chat_appearance_form_name.maxLength = receipt.maxlength.name;
+      chat_appearance_form_password.maxLength = receipt.maxlength.password;
+
       // chat form nonce
       chat_form_nonce.value = receipt.nonce;
 

anonstream/websocket.py

@@ -36,6 +36,11 @@ async def websocket_outbound(queue, user):
         'scrollback': CONFIG['MAX_CHAT_SCROLLBACK'],
         'digest': get_random_captcha_digest_for(user),
         'pingpong': CONFIG['TASK_BROADCAST_PING'],
+        'maxlength': {
+            'comment': CONFIG['CHAT_COMMENT_MAX_LENGTH'],
+            'name': CONFIG['CHAT_NAME_MAX_LENGTH'],
+            'password': CONFIG['CHAT_TRIPCODE_PASSWORD_MAX_LENGTH'],
+        },
     })
     while True:
         payload = await queue.get()