feat: support short-lived token endpoint

Deepgram/AuthClient.cs

@@ -0,0 +1,19 @@
+// Copyright 2021-2024 Deepgram .NET SDK contributors. All Rights Reserved.
+// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
+using Deepgram.Clients.Auth.v1;
+using Deepgram.Models.Authenticate.v1;
+
+namespace Deepgram;
+
+/// <summary>
+/// Implements the latest supported version of the Auth Client.
+/// </summary>
+public class AuthClient : Client
+{
+    public AuthClient(string apiKey = "", DeepgramHttpClientOptions? deepgramClientOptions = null,
+        string? httpId = null) : base(apiKey, deepgramClientOptions, httpId)
+    {
+    }
+}

Deepgram/ClientFactory.cs

@@ -49,6 +49,18 @@
         return new ListenWebSocketClient(apiKey, options);
     }
 
+    /// <summary>
+    /// Create a new AuthClient
+    /// </summary>
+    /// <param name="apiKey"></param>
+    /// <param name="options"></param>
+    /// <param name="httpId"></param>
+    /// <returns></returns>
+    public static V1.IAuthClient CreateAuthClient(string apiKey = "", DeepgramHttpClientOptions? options = null, string? httpId = null)
+    {
+        return new AuthClient(apiKey, options, httpId);
+    }
+
     /// <summary>
     /// Create a new ManageClient
     /// </summary>
@@ -160,7 +172,7 @@
             case 1:
                 Log.Information("ClientFactory", $"Version 1 of the ListenWebSocketClient is being deprecated in the next major version.");
                 Log.Information("ClientFactory", $"Transition to the latest version at your earliest convenience.");
                 return new ListenV1.Client(apiKey, options);
             case 2:
                 return new ListenV2.Client(apiKey, options);
             default:
@@ -210,7 +222,7 @@
             case 1:
                 Log.Information("ClientFactory", $"Version 1 of the ListenWebSocketClient is being deprecated in the next major version.");
                 Log.Information("ClientFactory", $"Transition to the latest version at your earliest convenience.");
                 return new SpeakV1.Client(apiKey, options);
             case 2:
                 return new SpeakV2.Client(apiKey, options);
             default:

Deepgram/Clients/Auth/v1/Client.cs

@@ -0,0 +1,38 @@
+// Copyright 2024 Deepgram .NET SDK contributors. All Rights Reserved.
+// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
+using Deepgram.Models.Authenticate.v1;
+using Deepgram.Models.Auth.v1;
+using Deepgram.Clients.Interfaces.v1;
+using Deepgram.Abstractions.v1;
+
+namespace Deepgram.Clients.Auth.v1;
+
+/// <summary>
+/// Implements version 1 of the Models Client.
+/// </summary>
+/// <param name="apiKey">Required DeepgramApiKey</param>
+/// <param name="deepgramClientOptions"><see cref="DeepgramHttpClientOptions"/> for HttpClient Configuration</param>
+public class Client(string? apiKey = null, IDeepgramClientOptions? deepgramClientOptions = null, string? httpId = null)
+    : AbstractRestClient(apiKey, deepgramClientOptions, httpId), IAuthClient
+{
+    /// <summary>
+    /// Gets a temporary JWT for the Deepgram API.
+    /// </summary>
+    /// <returns><see cref="GrantTokenResponse"/></returns>
+    public async Task<GrantTokenResponse> GrantToken(CancellationTokenSource? cancellationToken = default,
+        Dictionary<string, string>? addons = null, Dictionary<string, string>? headers = null)
+    {
+        Log.Verbose("AuthClient.GrantToken", "ENTER");
+
+        var uri = GetUri(_options, $"auth/{UriSegments.GRANTTOKEN}");
+        var result = await PostAsync<object, GrantTokenResponse>(uri, null, cancellationToken, addons, headers);
+
+        Log.Information("GrantToken", $"{uri} Succeeded");
+        Log.Debug("GrantToken", $"result: {result}");
+        Log.Verbose("AuthClient.GrantToken", "LEAVE");
+
+        return result;
+    }
+}

Deepgram/Clients/Auth/v1/UriSegments.cs

@@ -0,0 +1,12 @@
+// Copyright 2024 Deepgram .NET SDK contributors. All Rights Reserved.
+// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
+namespace Deepgram.Clients.Auth.v1;
+
+public static class UriSegments
+{
+    //using constants instead of inline value(magic strings) make consistence
+    //across SDK And Test Projects Simpler and Easier to change
+    public const string GRANTTOKEN = "grant";
+}

Deepgram/Clients/Interfaces/v1/IAuthClient.cs

@@ -0,0 +1,22 @@
+// Copyright 2021-2024 Deepgram .NET SDK contributors. All Rights Reserved.
+// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
+using Deepgram.Models.Auth.v1;
+
+namespace Deepgram.Clients.Interfaces.v1;
+
+/// <summary>
+/// Implements version 1 of the Auth Client.
+/// </summary>
+/// <param name="apiKey">Required DeepgramApiKey</param>
+/// <param name="deepgramClientOptions"><see cref="DeepgramHttpClientOptions"/> for HttpClient Configuration</param>
+public interface IAuthClient
+{
+    /// <summary>
+    /// Gets a short-lived JWT for the Deepgram API.
+    /// </summary>
+    /// <returns><see cref="GrantTokenResponse"/></returns>
+    public Task<GrantTokenResponse> GrantToken(CancellationTokenSource? cancellationToken = default,
+        Dictionary<string, string>? addons = null, Dictionary<string, string>? headers = null);
+}

Deepgram/Models/Auth/v1/GrantTokenResponse.cs

@@ -0,0 +1,30 @@
+// Copyright 2021-2024 Deepgram .NET SDK contributors. All Rights Reserved.
+// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
+namespace Deepgram.Models.Auth.v1;
+
+public record GrantTokenResponse
+{
+    /// <summary>
+    /// Access token for the Deepgram API
+    /// </summary>
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	[JsonPropertyName("access_token")]
+    public string? AccessToken { get; set; }
+
+    /// <summary>
+    /// TTL of the access token in seconds
+    /// </summary>
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	[JsonPropertyName("expires_in")]
+    public decimal? ExpiresIn { get; set; }
+
+    /// <summary>
+    /// Override ToString method to serialize the object
+    /// </summary>
+    public override string ToString()
+    {
+        return Regex.Unescape(JsonSerializer.Serialize(this, JsonSerializeOptions.DefaultOptions));
+    }
+}

examples/auth/grant-token/Auth.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<TargetFramework>net8.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>	
+	</PropertyGroup>
+
+	<ItemGroup>	
+		<PackageReference Include="Microsoft.Extensions.Http" Version="8.0.1" />
+	</ItemGroup>
+
+	<ItemGroup>
+	  <ProjectReference Include="..\..\..\Deepgram\Deepgram.csproj" />
+	</ItemGroup>
+
+    <ItemGroup>
+        <Using Include="Deepgram" />
+    </ItemGroup>
+
+</Project>

examples/auth/grant-token/Program.cs

@@ -0,0 +1,40 @@
+// Copyright 2024 Deepgram .NET SDK contributors. All Rights Reserved.
+// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
+using Deepgram.Models.Auth.v1;
+
+namespace SampleApp
+{
+    class Program
+    {
+        static async Task Main(string[] args)
+        {
+            // Initialize Library with default logging
+            // Normal logging is "Info" level
+            Library.Initialize();
+
+            // use the client factory with a API Key set with the "DEEPGRAM_API_KEY" environment variable
+            var deepgramClient = ClientFactory.CreateAuthClient();
+
+            // generate token
+            var tokenResp = await deepgramClient.GrantToken();
+            if (tokenResp == null)
+            {
+                Console.WriteLine("GrantToken failed.");
+                Environment.Exit(1);
+            }
+
+            string token = tokenResp.AccessToken;
+            string ttl = tokenResp.ExpiresIn.ToString();
+            Console.WriteLine($"Token: {token}");
+            Console.WriteLine($"TTL: {ttl}");
+
+            Console.WriteLine("\n\nPress any key to exit.");
+            Console.ReadKey();
+
+            // Teardown Library
+            Library.Terminate();
+        }
+    }
+}