Allow server info endpoints through CORS.

Necessary for accessing it from web pages.

SS14.ServerHub/Controllers/ServerListController.cs

@@ -9,6 +9,7 @@
 using System.Text.Json.Serialization;
 using System.Threading;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Cors;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
@@ -40,6 +41,7 @@ public ServerListController(
         _httpClient = httpClientFactory.CreateClient("ServerStatusCheck");
     }
 
+    [EnableCors(CorsPolicies.PolicyHubPublic)]
     [HttpGet]
     public async Task<IEnumerable<ServerInfo>> Get()
     {
@@ -51,6 +53,7 @@ public async Task<IEnumerable<ServerInfo>> Get()
         return dbInfos;
     }
 
+    [EnableCors(CorsPolicies.PolicyHubPublic)]
     [HttpGet("info")]
     public async Task<IActionResult> GetServerInfo(string url)
     {

SS14.ServerHub/CorsPolicies.cs

@@ -0,0 +1,9 @@
+namespace SS14.ServerHub;
+
+internal static class CorsPolicies
+{
+    /// <summary>
+    /// Things that can be requested by literally everybody.
+    /// </summary>
+    public const string PolicyHubPublic = "HubPublic";
+}

SS14.ServerHub/Startup.cs

@@ -32,6 +32,14 @@ public void ConfigureServices(IServiceCollection services)
     {
         services.AddControllers();
 
+        services.AddCors(options =>
+        {
+            options.AddPolicy(CorsPolicies.PolicyHubPublic, builder =>
+            {
+                builder.AllowAnyOrigin();
+            });
+        });
+
         services.AddDbContext<HubDbContext>(options =>
         {
             var connectionString = Configuration.GetConnectionString("DefaultConnection") ?? throw new InvalidOperationException("Must set DefaultConnection");
@@ -67,6 +75,8 @@ public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
 
         app.UseRouting();
 
+        app.UseCors();
+
         app.UseHttpMetrics();
 
         app.UseAuthorization();