move blueprints in dedicated folder

app/blueprints/errors/__init__.py

@@ -0,0 +1,5 @@
+from flask import Blueprint
+
+
+bp = Blueprint('errors', __name__)
+from . import handlers

app/blueprints/errors/handlers.py

@@ -0,0 +1,14 @@
+from flask import jsonify, render_template, request
+from werkzeug.exceptions import HTTPException
+from . import bp
+
+
+@bp.app_errorhandler(HTTPException)
+def handle_http_exception(error):
+    ''' Generic HTTP exception handler '''
+    accept_json = request.accept_mimetypes.accept_json
+    accept_html = request.accept_mimetypes.accept_html
+    if accept_json and not accept_html:
+        response = jsonify(str(error))
+        return response, error.code
+    return render_template('errors/error.html.j2', error=error), error.code