title: Is there a standard Firebase rule for preventing an authorized user from posting malicious code, abusive words or spam links?
body: <p>I've looked through the <a href="https://firebase.google.com/docs/rules" rel="nofollow noreferrer">official documentation</a> and the helpful (but slightly dated) &quot;<a href="https://www.youtube.com/watch?v=eW5MdE3ZcAw" rel="nofollow noreferrer">Security Rules!  | Get to know Cloud Firestore #6</a>&quot; video, but instead of reinventing the wheel, I'm looking to see if there's a standard Firebase rule for preventing an authorized user from posting malicious code, abusive words or spam links.</p>
  <p>For example, trying to prevent those bad things in 'sampleinputfield' below:</p>
  <pre><code>allow create: if
   request.auth != null &amp;&amp;
   request.resource.data.userId == request.auth.uid &amp;&amp;
   request.resource.data.sampleinputfield is string &amp;&amp;
   request.resource.data.sampleinputfield.size() &lt; 80 &amp;&amp;
   request.resource.data.sampleinputfield. &lt;&lt;something here to block spam, malicious code, etc&gt;&gt;;
  </code></pre>
  <p>I'm aware of how Cloud Functions can cleanup abusive language (see &quot;<a href="https://youtu.be/rERRuBjxJ80?t=356" rel="nofollow noreferrer">How do Cloud Functions work? | Get to know Cloud Firestore #11</a>&quot;) but I'm looking to see if there's something in rules also.</p>
  <p>Thanks for any help</p>