From 0e09073ee02a146c9af4dfbd1725d55c4f1bd70c Mon Sep 17 00:00:00 2001
From: Moritz <101179677+mxritzdev@users.noreply.github.com>
Date: Sat, 19 Jul 2025 22:50:34 +0200
Subject: [PATCH 1/2] Add .DotSettings.user to .gitignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 5cdc66f..6da3193 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ obj/
 riderModule.iml
 /_ReSharper.Caches/
 /LinkRouter/data
+*.DotSettings.user

From 8c9453676bd06459b22022c58a41c18cefed176c Mon Sep 17 00:00:00 2001
From: Moritz <101179677+mxritzdev@users.noreply.github.com>
Date: Sat, 19 Jul 2025 22:50:49 +0200
Subject: [PATCH 2/2] Add Prometheus metrics for route and 404 requests

---
 .../Http/Controllers/RedirectController.cs    | 34 +++++++++++++++++++
 LinkRouter/LinkRouter.csproj                  |  1 +
 LinkRouter/Program.cs                         |  7 ++++
 3 files changed, 42 insertions(+)

diff --git a/LinkRouter/App/Http/Controllers/RedirectController.cs b/LinkRouter/App/Http/Controllers/RedirectController.cs
index 1a36a96..7ba7fcb 100644
--- a/LinkRouter/App/Http/Controllers/RedirectController.cs
+++ b/LinkRouter/App/Http/Controllers/RedirectController.cs
@@ -3,6 +3,7 @@
 using LinkRouter.App.Configuration;
 using Microsoft.AspNetCore.Mvc;
 using MoonCore.Services;
+using Prometheus;
 
 namespace LinkRouter.App.Http.Controllers;
 
@@ -11,6 +12,26 @@ public class RedirectController : Controller
 {
 
     private readonly Config Config;
+    
+      
+    private readonly Counter RouteCounter = Metrics.CreateCounter(
+        "linkrouter_requests",
+        "Counts the number of requests to the link router",
+        new CounterConfiguration
+        {
+            LabelNames = new[] { "route" }
+        }
+    );
+    
+    
+    private readonly Counter NotFoundCounter = Metrics.CreateCounter(
+        "linkrouter_404_requests",
+        "Counts the number of not found requests to the link router",
+        new CounterConfiguration
+        {
+            LabelNames = new[] { "route" }
+        }
+    );
 
     public RedirectController(Config config)
     {
@@ -23,8 +44,17 @@ public IActionResult RedirectToExternalUrl(string path)
         var redirectRoute = Config.Routes.FirstOrDefault(x => x.Route == path || x.Route == path + "/" || x.Route == "/" + path);
 
         if (redirectRoute != null)
+        {
+            RouteCounter
+                .WithLabels(redirectRoute.Route)
+                .Inc();
+            
             return Redirect(redirectRoute.RedirectUrl);
+        }
             
+        NotFoundCounter
+            .WithLabels(path)
+            .Inc();
         
         if (Config.NotFoundBehavior.RedirectOn404)
             return Redirect(Config.NotFoundBehavior.RedirectUrl);
@@ -35,6 +65,10 @@ public IActionResult RedirectToExternalUrl(string path)
     [HttpGet("/")]
     public IActionResult GetRootRoute()
     {
+        RouteCounter
+            .WithLabels("/")
+            .Inc();
+        
         string url = Config.RootRoute;
         
         return Redirect(url);
diff --git a/LinkRouter/LinkRouter.csproj b/LinkRouter/LinkRouter.csproj
index 13c742b..2eb2d1b 100644
--- a/LinkRouter/LinkRouter.csproj
+++ b/LinkRouter/LinkRouter.csproj
@@ -12,6 +12,7 @@
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.20"/>
         <PackageReference Include="MoonCore" Version="1.5.4" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+        <PackageReference Include="prometheus-net.AspNetCore" Version="8.2.1" />
         <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0"/>
     </ItemGroup>
 
diff --git a/LinkRouter/Program.cs b/LinkRouter/Program.cs
index b4b1cfe..0842b5e 100644
--- a/LinkRouter/Program.cs
+++ b/LinkRouter/Program.cs
@@ -6,6 +6,7 @@
 using MoonCore.Extensions;
 using MoonCore.Helpers;
 using MoonCore.Services;
+using Prometheus;
 
 namespace LinkRouter;
 
@@ -46,8 +47,14 @@ public static void Main(string[] args)
         
         builder.Services.AddSingleton(config);
         
+        builder.Services.AddMetricServer(options =>
+        {
+            options.Port = 5000;
+        });
+        
         var app = builder.Build();
 
+        app.UseMetricServer();
         app.MapControllers();
 
         app.Run();