InterlockLedger.WatchDog 3.0.2

dotnet add package InterlockLedger.WatchDog --version 3.0.2                
NuGet\Install-Package InterlockLedger.WatchDog -Version 3.0.2                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="InterlockLedger.WatchDog" Version="3.0.2" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add InterlockLedger.WatchDog --version 3.0.2                
#r "nuget: InterlockLedger.WatchDog, 3.0.2"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install InterlockLedger.WatchDog as a Cake Addin
#addin nuget:?package=InterlockLedger.WatchDog&version=3.0.2

// Install InterlockLedger.WatchDog as a Cake Tool
#tool nuget:?package=InterlockLedger.WatchDog&version=3.0.2                



InterlockLedger.WatchDog is a Realtime Message, Event, HTTP (Request & Response) and Exception logger and viewer for ASP.Net 6 Web Apps and APIs. It allows developers log and view messages, events, http requests made to their web application and also exception caught during runtime in their web applications, all in Realtime. It leverages SignalR for real-time monitoring and LiteDb a Serverless MongoDB-like database with no configuration.

Request & Response Viewer

General Features

  • RealTime HTTP Request and Response Logger
  • RealTime Exception Logger
  • In-code message and event logging
  • User Friendly Logger Views
  • Search Option for HTTP and Exception Logs
  • Filtering Option for HTTP Logs using HTTP Methods and StatusCode
  • Logger View Authentication
  • Auto Clear Logs Option
  • In-code logger for messages and events

What's New

  • Now a privacy filtering class to vet/adjust information to be logged can be injected
  • Specify folder to store log database
  • Separate extension method to map endpoints for better integration with complex ASP.NET apps
  • Diagnostic logging when configuring middleware


  • .NET 6.0 and newer


Install via .NET CLI

dotnet add package InterlockLedger.WatchDog --version 3.0.0

Install via Package Manager

Install-Package InterlockLedger.WatchDog --version 3.0.0


To enable InterlockLedger.WatchDog to listen for requests, use the WatchDog middleware provided by WatchDog.

Add InterlockLedger.WatchDog Namespace to your startup code file

using InterlockLedger.WatchDog;

Register WatchDog service in the services configuration part of the initialization

Optional Change the folder where to create the database for the logs
services.AddWatchDogServices(opt => 
   opt.DatabaseFolder = "c:\\temp\\watchdog"; 
   // default uses SpecialFolder.LocalApplicationData and executing assembly name
Optional Setup AutoClear Logs

This clears the logs after a specific duration.

services.AddWatchDogServices(opt => 
   opt.UseAutoClear = true; 

NOTE When UseAutoClear = true

Default Schedule Time is set to Weekly, override it like below:

services.AddWatchDogServices(opt => 
   opt.UseAutoClear = true;
   opt.ClearTimeSchedule = WatchDogAutoClearScheduleEnum.Monthly;

Add WatchDog middleware in the HTTP request pipeline, with required credentials to enforce

This authentication information (Username and Password) will be used to access the log viewer, unless you specify a role to check first

app.UseWatchDog(opt => 
   opt.WatchPageUsername = "admin"; 
   opt.WatchPagePassword = "Qwerty@123"; 

NOTE Important If your projects startup or program class contains app.UseMvc() or app.UseRouting() then app.UseWatchDog() should come after

Optional Specify a role that the authenticated user must have to avoid asking the credentials
app.UseWatchDog(opt => 
   opt.WatchPageUsername = "admin"; 
   opt.WatchPagePassword = "Qwerty@123"; 
   opt.RequiredRole = "LogViewer";
Optional Add list of routes you want to ignore when logging requests

List of routes, paths or specific strings to be ignored should be a comma separated string like below.

app.UseWatchDog(opt => 
   opt.WatchPageUsername = "admin"; 
   opt.WatchPagePassword = "Qwerty@123"; 
   opt.Blacklist = "Test/testPost,weatherforecast";
Optional Activate WatchDog Exception Logger

This is used to log in-app exceptions that occur during the processing of a particular HTTP request.

app.UseWatchDog(opt => 
   opt.WatchPageUsername = "admin"; 
   opt.WatchPagePassword = "Qwerty@123"; 
   opt.LogExceptions = true;
Optional Inject privacy filtering of logged information

This is used to inject a class that will look at log details models and tweak them before being stored, to remove sensitive information

builder.Services.AddWatchDogServicesUsing<MyCustomModelsFilter>(opt => 
   opt.UseAutoClear = true;
   opt.ClearTimeSchedule = WatchDogAutoClearScheduleEnum.Monthly;

The class must implement IModelsFilter to do the needed filtering

class MyCustomModelsFilter : IModelsFilter
    public ExceptionLogModel FilterExceptionLog(ExceptionLogModel exceptionLogModel, RequestModel requestModel) => exceptionLogModel;

    public RequestModel FilterRequest(RequestModel requestModel) {
        if (requestModel.Path.Safe().StartsWith("/Private/", StringComparison.OrdinalIgnoreCase))
            requestModel.QueryString = "<<sensitive>>";
        return requestModel;

    public ResponseModel FilterResponse(ResponseModel responseModel, RequestModel requestModel) => responseModel;

Map the WatchDog Services/UI in the endpoints

This will make the LogViewer available at /watchdog

app.UseEndpoints(endpoints => {
    // map other needed things ...

Log Messages/Events

WatchLogger.Log("...TestGet Started...");

View Logs and Exception

Start your server and head to /watchdog to view the logs.

Example: or https://localhost:[your-port]/watchdog

Still confused? Check out the implementation in the WatchDogCompleteApiNet6 folder.

Example Screens

Login page

Request and Response Details

Exception Details

In-code log messages


Feel like something is missing? Fork the repo and send a PR.

Encountered a bug? Fork the repo and send a PR.

Alternatively, open an issue and we'll get to it as soon as we can.


Original WatchDog.NET

Kelechi Onyekwere - Github Twitter

Israel Ulelu - Github Twitter


Rafael Monoman Teixeira - Github

Product Compatible and additional computed target framework versions.
.NET net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

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Version Downloads Last updated
3.0.2 359 11/1/2022
3.0.0 348 10/18/2022
2.0.1 364 10/11/2022
1.0.3 373 10/8/2022

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