Upgrade to .NET 8 and fix HttpClient memory leak

.github/workflows/ci.yml

@@ -19,9 +19,9 @@ jobs:
     name: Unit Tests on Linux
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up dotnet
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '6.x'
+          dotnet-version: '8'
       - run: dotnet test

Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build-env
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
 WORKDIR /build
 
 # Copy csproj and restore as distinct layers
@@ -10,7 +10,7 @@ COPY sama/ ./
 RUN dotnet publish -c Release -o out --no-restore /p:MvcRazorCompileOnPublish=true
 
 # Build runtime image
-FROM mcr.microsoft.com/dotnet/aspnet:6.0
+FROM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /opt/sama
 COPY --from=build-env /build/out .
 ENTRYPOINT ["dotnet", "sama.dll"]

Dockerfile-buildx-amd64

@@ -1,5 +1,5 @@
 # Forcing amd64 for buildx per https://github.com/dotnet/dotnet-docker/issues/1537#issuecomment-755351628
-FROM mcr.microsoft.com/dotnet/sdk:6.0-bullseye-slim-amd64 AS build-env
+FROM mcr.microsoft.com/dotnet/sdk:8.0-bookworm-slim-amd64 AS build-env
 WORKDIR /build
 
 # Copy csproj and restore as distinct layers
@@ -11,7 +11,7 @@ COPY sama/ ./
 RUN dotnet publish -c Release -o out --no-restore /p:MvcRazorCompileOnPublish=true
 
 # Build runtime image
-FROM mcr.microsoft.com/dotnet/aspnet:6.0
+FROM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /opt/sama
 COPY --from=build-env /build/out .
 ENTRYPOINT ["dotnet", "sama.dll"]

sama/Controllers/AccountController.cs

@@ -173,7 +173,7 @@ public async Task<IActionResult> Edit(Guid? id)
             var isRemote = (user == null && userId[0] == 0 && userId[1] == 0 && userId[2] == 0 && userId[3] == 0);
             if (isRemote)
             {
-                ViewData["IsCurrentUser"] = (id == Guid.Parse(_userManager.GetUserId(User)));
+                ViewData["IsCurrentUser"] = (id == Guid.Parse(_userManager.GetUserId(User)!));
                 return View("EditRemote");
             }
 

sama/Controllers/EndpointsController.cs

@@ -10,21 +10,8 @@
 namespace sama.Controllers
 {
     [Authorize]
-    public class EndpointsController : Controller
+    public class EndpointsController(ApplicationDbContext _context, StateService _stateService, UserManagementService _userService, AggregateNotificationService _notifier) : Controller
     {
-        private readonly ApplicationDbContext _context;
-        private readonly StateService _stateService;
-        private readonly UserManagementService _userService;
-        private readonly AggregateNotificationService _notifier;
-
-        public EndpointsController(ApplicationDbContext context, StateService stateService, UserManagementService userService, AggregateNotificationService notifier)
-        {
-            _context = context;
-            _stateService = stateService;
-            _userService = userService;
-            _notifier = notifier;
-        }
-
         [AllowAnonymous]
         public async Task<IActionResult> IndexRedirect()
         {

sama/Extensions/EndpointHttpExtensions.cs

@@ -1,17 +1,13 @@
-using Newtonsoft.Json;
-using Newtonsoft.Json.Serialization;
-using sama.Models;
+using sama.Models;
 using System;
 using System.Collections.Generic;
-using System.Dynamic;
 using System.Linq;
+using System.Text.Json.Nodes;
 
 namespace sama.Extensions
 {
     public static class EndpointHttpExtensions
     {
-        private static JsonSerializerSettings JsonSettings = new JsonSerializerSettings { ContractResolver = new DefaultContractResolver() };
-
         public static string? GetHttpLocation(this Endpoint endpoint) =>
             GetValue<string>(endpoint, "Location");
 
@@ -45,43 +41,48 @@ public static void SetHttpCustomTlsCert(this Endpoint endpoint, string? pemEncod
 
         private static List<T>? GetValueList<T>(Endpoint endpoint, string name, List<T>? defaultValue = null)
         {
-            var list = GetValue<List<object>>(endpoint, name);
-            if (list == null)
+            EnsureHttp(endpoint);
+            if (string.IsNullOrWhiteSpace(endpoint.JsonConfig)) return defaultValue;
+
+            var node = JsonNode.Parse(endpoint.JsonConfig);
+            var matches = node?.AsObject().Where(kvp => kvp.Key == name);
+            if (matches?.Any() ?? false)
             {
-                return defaultValue;
+                if (matches.First().Value == null) return defaultValue;
+                var array = matches.First().Value!.AsArray();
+                if (array == null) return defaultValue;
+                return array.Select(n => n!.GetValue<T>()).ToList();
             }
-            return list.Select(o => (T)Convert.ChangeType(o, typeof(T))).ToList();
+            // else
+            return defaultValue;
         }
 
         private static T? GetValue<T>(Endpoint endpoint, string name, T? defaultValue = default(T))
         {
             EnsureHttp(endpoint);
             if (string.IsNullOrWhiteSpace(endpoint.JsonConfig)) return defaultValue;
 
-            var obj = JsonConvert.DeserializeObject<ExpandoObject>(endpoint.JsonConfig, JsonSettings) as IDictionary<string, object>;
-            if (obj == null)
+            var node = JsonNode.Parse(endpoint.JsonConfig);
+            var matches = node?.AsObject().Where(kvp => kvp.Key == name);
+            if (matches?.Any() ?? false)
             {
-                throw new ArgumentException($"Unable to get value for '{name}'");
+                if (matches.First().Value == null) return defaultValue;
+                return matches.First().Value!.GetValue<T>();
             }
-            if (!obj.ContainsKey(name))
-            {
-                return defaultValue;
-            }
-            return (T)obj[name];
+            // else
+            return defaultValue;
         }
 
         private static void SetValue<T>(Endpoint endpoint, string name, T? value)
         {
             EnsureHttp(endpoint);
 
             var json = (string.IsNullOrWhiteSpace(endpoint.JsonConfig) ? "{}" : endpoint.JsonConfig);
-            var obj = JsonConvert.DeserializeObject<ExpandoObject>(json, JsonSettings) ?? throw new ArgumentException($"Unable to deserialize '{name}'");
-            obj!.Remove(name, out object _);
-            if (!obj.TryAdd(name, value))
-            {
-                throw new ArgumentException($"Unable to set value for '{name}'");
-            }
-            endpoint.JsonConfig = JsonConvert.SerializeObject(obj, JsonSettings);
+
+            var nodeObj = JsonNode.Parse(json)?.AsObject() ?? throw new ArgumentException($"Unable to deserialize '{name}'");
+            nodeObj.Remove(name);
+            nodeObj.Add(name, JsonValue.Create(value));
+            endpoint.JsonConfig = nodeObj.ToJsonString();
         }
 
         private static void EnsureHttp(Endpoint endpoint)

sama/Extensions/EndpointIcmpExtensions.cs

@@ -1,31 +1,40 @@
-using Newtonsoft.Json;
-using Newtonsoft.Json.Serialization;
-using sama.Models;
+using sama.Models;
 using System;
-using System.Dynamic;
+using System.Linq;
+using System.Text.Json.Nodes;
 
 namespace sama.Extensions
 {
     public static class EndpointIcmpExtensions
     {
-        private static JsonSerializerSettings JsonSettings = new JsonSerializerSettings { ContractResolver = new DefaultContractResolver() };
+        private const string IcmpAddressKey = "Address";
 
         public static string? GetIcmpAddress(this Endpoint endpoint)
         {
             EnsureIcmp(endpoint);
             if (string.IsNullOrWhiteSpace(endpoint.JsonConfig)) return null;
 
-            return JsonConvert.DeserializeObject<dynamic>(endpoint.JsonConfig, JsonSettings)?.Address?.ToObject<string>();
+            var node = JsonNode.Parse(endpoint.JsonConfig);
+            var matches = node?.AsObject().Where(kvp => kvp.Key == IcmpAddressKey);
+            if (matches?.Any() ?? false)
+            {
+                if (matches.First().Value == null) return null;
+                return matches.First().Value!.GetValue<string>();
+            }
+            // else
+            return null;
         }
 
         public static void SetIcmpAddress(this Endpoint endpoint, string? address)
         {
             EnsureIcmp(endpoint);
 
             var json = (string.IsNullOrWhiteSpace(endpoint.JsonConfig) ? "{}" : endpoint.JsonConfig);
-            dynamic obj = JsonConvert.DeserializeObject<ExpandoObject>(json, JsonSettings) ?? throw new ArgumentException("Unable to deserialize JSON settings for endpoint");
-            obj.Address = address;
-            endpoint.JsonConfig = JsonConvert.SerializeObject(obj, JsonSettings);
+
+            var nodeObj = JsonNode.Parse(json)?.AsObject() ?? throw new ArgumentException($"Unable to deserialize Address");
+            nodeObj.Remove(IcmpAddressKey);
+            nodeObj.Add(IcmpAddressKey, JsonValue.Create(address));
+            endpoint.JsonConfig = nodeObj.ToJsonString();
         }
 
         private static void EnsureIcmp(Endpoint endpoint)

sama/HttpHandlerFactory.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Net.Http;
+using System.Net.Security;
+
+namespace sama;
+
+public class HttpHandlerFactory
+{
+	public virtual HttpMessageHandler Create(bool allowAutoRedirect, SslClientAuthenticationOptions? sslOptions)
+	{
+		var handler = new SocketsHttpHandler
+		{
+			PooledConnectionLifetime = TimeSpan.Zero,
+			AllowAutoRedirect = allowAutoRedirect,
+		};
+		if (sslOptions != null)
+		{
+			handler.SslOptions = sslOptions;
+		}
+		return handler;
+	}
+}

sama/Services/GraphiteNotificationService.cs

@@ -57,7 +57,7 @@ public virtual void NotifySingleResult(Endpoint endpoint, EndpointCheckResult re
             }
             catch (Exception ex)
             {
-                _logger.LogError(0, "Unable to send Graphite notification", ex);
+                _logger.LogError(ex, "Unable to send Graphite notification");
             }
         }