Changes

2026-05-20 14:25:07 +03:00
parent fb5b254570
commit aa79b422e4
12 changed files with 239 additions and 1 deletions
@@ -0,0 +1,72 @@
+using Microsoft.Extensions.Options;
+using Web.Settings;
+
+namespace Web.Middleware;
+
+public sealed class SiteModeMiddleware(RequestDelegate next, IOptions<SiteSettings> options)
+{
+    private static readonly string[] StaticAssetPrefixes =
+    [
+        "/css/",
+        "/js/",
+        "/img/",
+        "/logo/",
+        "/fonts/"
+    ];
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        var mode = ResolveMode(options.Value.Mode);
+        if (mode == SiteModes.Normal)
+        {
+            await next(context);
+            return;
+        }
+
+        var path = context.Request.Path.Value ?? "/";
+        var statusPath = GetStatusPath(mode);
+
+        if (IsAllowedPath(path, statusPath))
+        {
+            if (mode == SiteModes.Unavailable &&
+                path.Equals("/site-unavailable.html", StringComparison.OrdinalIgnoreCase))
+            {
+                context.Response.StatusCode = StatusCodes.Status503ServiceUnavailable;
+                context.Response.Headers.RetryAfter = "3600";
+            }
+
+            await next(context);
+            return;
+        }
+
+        context.Response.Redirect(statusPath);
+    }
+
+    private static string ResolveMode(string? configuredMode)
+    {
+        if (string.Equals(configuredMode, SiteModes.UnderConstruction, StringComparison.OrdinalIgnoreCase))
+            return SiteModes.UnderConstruction;
+
+        if (string.Equals(configuredMode, SiteModes.Unavailable, StringComparison.OrdinalIgnoreCase))
+            return SiteModes.Unavailable;
+
+        return SiteModes.Normal;
+    }
+
+    private static string GetStatusPath(string mode) =>
+        mode == SiteModes.UnderConstruction
+            ? "/under-construction.html"
+            : "/site-unavailable.html";
+
+    private static bool IsAllowedPath(string path, string statusPath)
+    {
+        if (path.Equals(statusPath, StringComparison.OrdinalIgnoreCase))
+            return true;
+
+        if (path.Equals("/favicon.ico", StringComparison.OrdinalIgnoreCase))
+            return true;
+
+        return StaticAssetPrefixes.Any(prefix =>
+            path.StartsWith(prefix, StringComparison.OrdinalIgnoreCase));
+    }
+}