Let the generic error handler generate json again

app/errors/handlers.py

@@ -1,5 +1,12 @@
-from flask import render_template
+from flask import jsonify, render_template, request, Response
+from werkzeug.exceptions import HTTPException
 
 
-def generic_error_handler(e):
+def generic_error_handler(error: HTTPException):
-    return render_template('errors/error.html.j2', error=e), e.code
+    accent_json: bool = request.accept_mimetypes.accept_json
+    accept_html: bool = request.accept_mimetypes.accept_html
+    if accent_json and not accept_html:
+        response: Response = jsonify(str(error))
+        response.status_code = error.code
+        return response
+    return render_template('errors/error.html.j2', error=error), error.code

app/templates/errors/error.html.j2

@@ -4,7 +4,7 @@
 
 {% block page_content %}
 <div class="container">
-  <h1 id="title">{{ error.name }}</h1>
+  <h1 id="title">{{ error.code }} {{ error.name }}</h1>
   <p>{{ error.description }}</p>
 </div>
 {% endblock page_content %}