Serve site with Flask on Vercel

Author: parthmax2

site/app.py

@@ -0,0 +1,22 @@
+from pathlib import Path
+
+from flask import Flask, abort, send_from_directory
+
+
+BASE_DIR = Path(__file__).resolve().parent
+
+app = Flask(__name__, static_folder=None)
+
+
+@app.get("/")
+def index():
+    return send_from_directory(BASE_DIR, "index.html")
+
+
+@app.get("/<path:path>")
+def serve_site_file(path):
+    target = (BASE_DIR / path).resolve()
+    if not target.is_file() or BASE_DIR not in target.parents:
+        abort(404)
+    return send_from_directory(BASE_DIR, path)
+

site/requirements.txt

@@ -0,0 +1 @@
+Flask==3.0.3

site/vercel.json

@@ -1,4 +1,15 @@
-{
-  "buildCommand": null,
-  "outputDirectory": "."
+{
+  "version": 2,
+  "builds": [
+    {
+      "src": "app.py",
+      "use": "@vercel/python"
+    }
+  ],
+  "routes": [
+    {
+      "src": "/(.*)",
+      "dest": "app.py"
+    }
+  ]
 }