Lightweight library allowing to manage access token its lifetime with caching capability for services accounts with the oauth2 protocol

Installing Nuget

Install nuget package to your awesome project.

Package Name	NuGet	NuGet Install
OpenHarbor.JwtTokenManager		PM> Install-Package OpenHarbor.JwtTokenManager
OpenHarbor.JwtTokenManager.Abstractions		PM> Install-Package OpenHarbor.JwtTokenManager.Abstractions

How to use

appsettings.json

{
"JwtTokenManager": {
    "TokenEndpoint": "",
    "ClientId": "",
    "ClientSecret": "",
    "Scopes": []
  }
}

Program.cs

builder.Services.AddHttpClient();
builder.Services.AddMemoryCache(); // use the IMemoryCache provider you want

builder.Services.AddJwtTokenManager(builder.Configuration, "JwtTokenManager");

Program.cs with deeper configurations

builder.Services.AddHttpClient();

builder.Services.AddJwtTokenManager(builder.Configuration, "JwtTokenManager", options =>
{
  options.Cache(cacheOptions =>
      {
        cacheOptions.ExpirationOffset = 30; // 15 by default
      }, 
      // optional to configure your own IMemoryCache provider for the token management
      provider => provider.GetRequiredService<IMemoryCache>());
  
  options.Configuration(overrideConfiguration =>
  {
    overrideConfiguration.Scopes = ["offline_access"];
  });
});

Use the JwtTokenManager

public class MyService(HttpClient httpClient, IJwtTokenManagerService jwtTokenManagerService)
{
  public async Task DoActionAsync(CancellationToken cancellationToken) {
    
    var tokenResult = await jwtTokenManagerService.GetTokenAsync(cancellationToken);
    httpClient.SetJwtAccessToken(tokenResult);
    ...
  }
}