Add ip update capabilities

JoshHeaps.Net/JoshHeaps.Net.csproj

@@ -6,4 +6,8 @@
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="System.Text.Json" Version="9.0.3" />
+  </ItemGroup>
+
 </Project>

JoshHeaps.Net/Program.cs

@@ -2,6 +2,8 @@ var builder = WebApplication.CreateBuilder(args);
 
 // Add services to the container.
 builder.Services.AddRazorPages();
+var configuration = builder.Configuration;
+_ = Run(configuration);
 
 var app = builder.Build();
 
@@ -23,3 +25,98 @@ app.UseAuthorization();
 app.MapRazorPages();
 
 app.Run();
+
+static async Task Run(IConfiguration config)
+{
+    HttpClient httpClient = new();
+    AAAARecord dnsRecord = await GetDnsRecordAsync(config);
+    string lastKnownIp = dnsRecord.content;
+    TimeSpan checkInterval = TimeSpan.FromMinutes(1);
+
+    while (true)
+    {
+        try
+        {
+            string currentIp = await GetPublicIpAsync(httpClient) ?? "";
+
+            if (lastKnownIp != currentIp)
+            {
+                await UpdateDnsIpAsync(config, dnsRecord, currentIp);
+
+                lastKnownIp = currentIp;
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine(ex.Message);
+        }
+
+        await Task.Delay(checkInterval);
+    }
+}
+
+static async Task<string> GetPublicIpAsync(HttpClient client)
+{
+    try
+    {
+        return await client.GetStringAsync(@"https://api.ipify.org/");
+    }
+    catch
+    {
+        await Task.Delay(TimeSpan.FromSeconds(10));
+        Console.WriteLine("Reattempting to grab public ip");
+
+        return await GetPublicIpAsync(client);
+    }
+}
+
+static async Task<AAAARecord> GetDnsRecordAsync(IConfiguration config)
+{
+    try
+    {
+        HttpClient cfClient = new();
+        cfClient.DefaultRequestHeaders.Add("X-Auth-Email", config["cfEmail"]);
+        cfClient.DefaultRequestHeaders.Add("X-Auth-Key", config["cfKey"]);
+        var result = await cfClient.GetAsync(@$"https://api.cloudflare.com/client/v4/zones/{config["zoneId"]}/dns_records");
+        Console.WriteLine(await result.Content.ReadAsStringAsync());
+        var records = System.Text.Json.JsonSerializer.Deserialize<RecordList>(await result.Content.ReadAsStringAsync());
+        return records!.result[0];
+    }
+    catch
+    {
+        await Task.Delay(TimeSpan.FromSeconds(10));
+        Console.WriteLine("Reattempting to grab current ip");
+
+        return await GetDnsRecordAsync(config);
+    }
+}
+
+static async Task UpdateDnsIpAsync(IConfiguration config, AAAARecord record, string ip)
+{
+    HttpClient cfClient = new();
+    cfClient.DefaultRequestHeaders.Add("X-Auth-Email", config["cfEmail"]);
+    cfClient.DefaultRequestHeaders.Add("X-Auth-Key", config["cfKey"]);
+    object content = new
+    {
+        comment = "Update as needed",
+        content = ip,
+        name = "@",
+        proxied = true,
+        ttl = 3600,
+        type = "AAAA"
+    };
+
+    var result = await cfClient.PutAsJsonAsync(@$"https://api.cloudflare.com/client/v4/zones/{config["zoneId"]}/dns_records{record.id}", content);
+
+    if (!result.IsSuccessStatusCode)
+    {
+        await Task.Delay(TimeSpan.FromSeconds(10));
+        Console.WriteLine("Reattempting to update ip");
+
+        await UpdateDnsIpAsync(config, record, ip);
+    }
+}
+
+record AAAARecord(string comment, string content, string name, string id);
+
+record RecordList(List<AAAARecord> result);