GUI: migrate storage from PostgreSQL to SQLite and expose conf download

gui/app.py

@@ -2,18 +2,17 @@
 import base64
 import io
 import os
+import sqlite3
 import subprocess
 from datetime import datetime
 
 import qrcode
 from flask import Flask, redirect, render_template, request, url_for, flash, Response
-from psycopg import connect
-from psycopg.rows import dict_row
 
 app = Flask(__name__)
 app.secret_key = os.environ.get("APP_SECRET", "dev-secret")
 
-DB_DSN = os.environ.get("DB_DSN", "postgresql://wgadmin:wgadmin@127.0.0.1:5432/wgadmin")
+DB_PATH = os.environ.get("DB_PATH", "/opt/wg-admin-gui/data/wgadmin.db")
 WG_INTERFACE = os.environ.get("WG_INTERFACE", "wg0")
 WG_META_FILE = os.environ.get("WG_META_FILE", "/etc/wireguard/wg-meta.env")
 ADMIN_USER = os.environ.get("ADMIN_USER", "admin")
@@ -21,23 +20,25 @@ ADMIN_PASSWORD = os.environ.get("ADMIN_PASSWORD", "")
 
 
 def db_conn():
-    return connect(DB_DSN, row_factory=dict_row)
+    os.makedirs(os.path.dirname(DB_PATH), exist_ok=True)
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    return conn
 
 
 def ensure_schema():
-    with db_conn() as conn, conn.cursor() as cur:
-        cur.execute(
-            """
+    with db_conn() as conn:
+        cur = conn.cursor()
+        cur.execute("""
             CREATE TABLE IF NOT EXISTS peers (
-              id BIGSERIAL PRIMARY KEY,
+              id INTEGER PRIMARY KEY AUTOINCREMENT,
               name TEXT NOT NULL,
               public_key TEXT UNIQUE NOT NULL,
               client_address TEXT,
               advertised_routes TEXT,
-              created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+              created_at TEXT NOT NULL DEFAULT (datetime('now'))
             );
-            """
-        )
+        """)
         conn.commit()
 
 
@@ -150,9 +151,10 @@ def _schema():
 def index():
     meta = load_meta()
     runtime = {p["public_key"]: p for p in wg_dump()}
-    with db_conn() as conn, conn.cursor() as cur:
+    with db_conn() as conn:
+        cur = conn.cursor()
         cur.execute("SELECT * FROM peers ORDER BY id DESC")
-        db_peers = cur.fetchall()
+        db_peers = [dict(r) for r in cur.fetchall()]
 
     items = []
     seen = set()
@@ -260,16 +262,14 @@ def new_peer():
     client_conf = "\n".join(conf_lines)
     qr_b64 = to_png_b64(client_conf)
 
-    with db_conn() as conn, conn.cursor() as cur:
-        cur.execute(
-            """
+    with db_conn() as conn:
+        cur = conn.cursor()
+        cur.execute("""
             INSERT INTO peers(name, public_key, client_address, advertised_routes)
-            VALUES (%s,%s,%s,%s)
+            VALUES (?,?,?,?)
             ON CONFLICT(public_key)
             DO UPDATE SET name=excluded.name, client_address=excluded.client_address, advertised_routes=excluded.advertised_routes
-            """,
-            (name, client_pub, client_addr, routes),
-        )
+        """, (name, client_pub, client_addr, routes))
         conn.commit()
 
     return render_template(