add simple editor UI and backend

editor/server/examples.py

@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: MIT
+
+import os
+import re
+
+from flask import (
+    Blueprint,
+    json,
+    abort,
+    redirect,
+)
+
+from . import get_common_cf_template_params, render_cf_error_page
+
+root_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../')
+examples_dir = os.path.join(root_dir, 'examples')
+
+bp = Blueprint('examples', __name__, url_prefix='/')
+
+
+param_cache: dict[str, dict] = {}
+
+def get_page_params(name: str) -> dict:
+    name = re.sub(r'[^\w]', '', name)
+    params = param_cache.get(name)
+    if params is not None:
+        return params
+    try:
+        with open(os.path.join(examples_dir, f'{name}.json')) as f:
+            params = json.load(f)
+        param_cache[name] = params
+        return params
+    except Exception as _:
+        return None
+
+
+@bp.route('/', defaults={'name': 'default'})
+@bp.route('/<path:name>')
+def index(name: str):
+    name = os.path.basename(name)  # keep only the base name
+    lower_name = name.lower()
+    print(lower_name, name)
+    if name != lower_name:
+        return redirect(lower_name)
+    else:
+        name = lower_name
+
+    params = get_page_params(name)
+    if params is None:
+        abort(404)
+
+    params = {
+        **params,
+        **get_common_cf_template_params(),
+    }
+
+    # Render the error page
+    return render_cf_error_page(params, use_cdn=True), 500