get public ip

NDB.Infrastructure.PublicIP/Class1.cs

@@ -1,8 +0,0 @@
-using System;
-
-namespace NDB.Infrastructure.PublicIP
-{
-    public class Class1
-    {
-    }
-}

NDB.Infrastructure.PublicIP/DependencyInjectionExtensions.cs

@@ -0,0 +1,13 @@
+using Microsoft.Extensions.DependencyInjection;
+using NDB.Infrastructure.PublicIP.Services;
+
+namespace NDB.Infrastructure.PublicIP
+{
+    public static class DependencyInjectionExtensions
+    {
+        public static void AddPublicIPService(this IServiceCollection services)
+        {
+            services.AddHttpClient<IPublicIPService, PublicIPService>();
+        }
+    }
+}

NDB.Infrastructure.PublicIP/Entities/IPInfo.cs

@@ -0,0 +1,7 @@
+namespace NDB.Infrastructure.PublicIP.Entities
+{
+    public class IPInfo
+    {
+        public string ip { get; set; }
+    }
+}

NDB.Infrastructure.PublicIP/NDB.Infrastructure.PublicIP.csproj

@@ -4,4 +4,10 @@
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="3.0.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+  </ItemGroup>
+
 </Project>

NDB.Infrastructure.PublicIP/Services/IPublicIPService.cs

@@ -0,0 +1,10 @@
+using NDB.Infrastructure.PublicIP.Entities;
+using System.Threading.Tasks;
+
+namespace NDB.Infrastructure.PublicIP.Services
+{
+    public interface IPublicIPService
+    {
+        Task<IPInfo> GetPublicIP();
+    }
+}

NDB.Infrastructure.PublicIP/Services/PublicIPService.cs

@@ -0,0 +1,44 @@
+using NDB.Infrastructure.PublicIP.Entities;
+using Newtonsoft.Json;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace NDB.Infrastructure.PublicIP.Services
+{
+    public class PublicIPService : IPublicIPService
+    {
+        private const string _url1 = "https://api.ipify.org/?format=json";
+        private const string _url2 = "https://ip.seeip.org/json";
+
+        private readonly HttpClient _httpClient;
+
+        public PublicIPService(HttpClient httpClient)
+        {
+            _httpClient = httpClient;
+        }
+
+        public async Task<IPInfo> GetPublicIP()
+        {
+            IPInfo result = null;
+
+            using (var response = await _httpClient.GetAsync(_url1))
+            {
+                if (response.IsSuccessStatusCode)
+                    result = await GetResult(response);
+            }
+
+            if (result != null)
+                return result;
+
+            using (var response = await _httpClient.GetAsync(_url2))
+            {
+                if (response.IsSuccessStatusCode)
+                    result = await GetResult(response);
+            }
+
+            return result;
+        }
+
+        private async Task<IPInfo> GetResult(HttpResponseMessage response) => JsonConvert.DeserializeObject<IPInfo>(await response.Content.ReadAsStringAsync());
+    }
+}