First commit

2026-02-06 17:29:56 +09:00
commit ea90cc5d58
80 changed files with 75834 additions and 0 deletions
@@ -0,0 +1,84 @@
+using System.Text;
+
+namespace LowLevelGuyCom.Middleware;
+
+public sealed class CurlLandingMiddleware(
+    RequestDelegate next)
+{
+    public async Task Invoke(HttpContext context)
+    {
+        if (!HttpMethods.IsGet(context.Request.Method) || context.Request.Path != "/")
+        {
+            await next(context);
+            return;
+        }
+
+        if (WantsTerminalView(context.Request))
+        {
+            context.Response.StatusCode = StatusCodes.Status200OK;
+            context.Response.ContentType = "text/plain; charset=utf-8";
+            context.Response.Headers.CacheControl = "no-cache";
+
+            string ansi = BuildLowLevelGuyAnsi();
+
+            await context.Response.WriteAsync(ansi, Encoding.UTF8);
+            return;
+        }
+
+        await next(context);
+    }
+
+    private static bool WantsTerminalView(HttpRequest request)
+    {
+        string userAgent = request.Headers.UserAgent.ToString();
+
+        if (!string.IsNullOrWhiteSpace(userAgent))
+        {
+            string lowerUserAgent = userAgent.ToLowerInvariant();
+            if (lowerUserAgent.Contains("curl"))
+                return true;
+        }
+
+        return false;
+    }
+
+    private static string BuildLowLevelGuyAnsi()
+    {
+        const string ESC = "\u001b";
+        string Arch(string s) => ESC + "[38;2;97;214;214m" + s + ESC + "[0m";
+        string Dim(string s) => ESC + "[38;2;140;140;140m" + s + ESC + "[0m";
+        string Bold(string s) => ESC + "[1m" + s + ESC + "[0m";
+
+        var sb = new StringBuilder();
+
+        sb.AppendLine(Arch("           /\\"));
+        sb.AppendLine(Arch("          /  \\") + "        " + Bold("LOW LEVEL GUY"));
+        sb.AppendLine(Arch("         /\\   \\") + "       " + Dim("arch vibes • low-level content"));
+        sb.AppendLine(Arch("        /      \\"));
+        sb.AppendLine(Arch("       /   ,,   \\") + "      C • ASM • Linux");
+        sb.AppendLine(Arch("      /   |  |  -\\") + "     no magic • just bytes");
+        sb.AppendLine(Arch("     /_-''    ''-_\\" ));
+        sb.AppendLine();
+        sb.AppendLine(Dim("────────────────────────────────────────────────────────"));
+        sb.AppendLine();
+        sb.AppendLine("$ curl " + Arch("low-level-guy.com"));
+        sb.AppendLine("$ web  " + Arch("https://low-level-guy.com"));
+        sb.AppendLine();
+        sb.AppendLine("• systems programming");
+        sb.AppendLine("• graphics from scratch");
+        sb.AppendLine("• compilers, loaders, kernels");
+        sb.AppendLine();
+        sb.AppendLine(Dim("// operating below the abstraction layer"));
+        sb.AppendLine();
+
+        return sb.ToString();
+    }
+}
+
+public static class CurlLandingMiddlewareExtensions
+{
+    public static IApplicationBuilder UseCurlLanding(this IApplicationBuilder app)
+    {
+        return app.UseMiddleware<CurlLandingMiddleware>();
+    }
+}