ElmahCore 2.0.5

ELMAH for ASP.NET Core

Install-Package ElmahCore -Version 2.0.5
dotnet add package ElmahCore --version 2.0.5
<PackageReference Include="ElmahCore" Version="2.0.5" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ElmahCore --version 2.0.5
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

This project is licensed under the terms of the Apache license 2.0.

Using ElmahCore

ELMAH for Net.Standard and Net.Core

alt text

Add nuget package elmahcore

Simple usage

Startup.cs

1)	services.AddElmah() in ConfigureServices 
2)	app.UseElmah(); in Configure

app.UseElmah() must be after initializing other exception handling middleware, such as (UseExceptionHandler, UseDeveloperExceptionPage, etc.)

Default elmah path ~/elmah.

Change URL path

services.AddElmah(options => options.Path = "you_path_here")

Restrict access to the Elmah url

services.AddElmah(options =>
{
        options.OnPermissionCheck = context => context.User.Identity.IsAuthenticated;
});

Note: app.UseElmah(); needs to be after

app.UseAuthentication();
app.UseAuthorization();
app.UseElmah();

or the user will be redirected to the sign in screen even if he is authenticated.

Change Error Log type

You can create your own error log, which will store errors anywhere.

    class MyErrorLog: ErrorLog
    //implement ErrorLog

This ErrorLogs available in board:

  • MemoryErrorLog – store errors in memory (by default)
  • XmlFileErrorLog – store errors in XML files
  • SqlErrorLog - store errors in MS SQL (add reference to ElmahCore.Sql)
  • MysqlErrorLog - store errors in MySQL (add reference to ElmahCore.MySql)
  • PgsqlErrorLog - store errors in PostgreSQL (add reference to ElmahCore.Postgresql)
services.AddElmah<XmlFileErrorLog>(options =>
{
    options.LogPath = "~/log"; // OR options.LogPath = "с:\errors";
});
services.AddElmah<SqlErrorLog>(options =>
{
    options.ConnectionString = "connection_string";
});

Rise exception

public IActionResult Test()
{
    HttpContext.RiseError(new InvalidOperationException("Test"));
    ...
}

Microsoft.Extensions.Logging support

Since version 2.0 ElmahCore support Microsoft.Extensions.Logging
alt text

Source Preview

Since version 2.0.1 ElmahCore support source preview.
Just add paths to source files.

services.AddElmah(options =>
{
   options.SourcePaths = new []
   {
      @"D:\tmp\ElmahCore.DemoCore3",
      @"D:\tmp\ElmahCore.Mvc",
      @"D:\tmp\ElmahCore"
   };
});

Log the request body

Since version 2.0.5 ElmahCore can log the request body.
Just add paths to source files.

Using UseElmahExceptionPage

You can replace UseDeveloperExceptionPage to UseElmahExceptionPage

if (env.IsDevelopment())
{
   //app.UseDeveloperExceptionPage();
   app.UseElmahExceptionPage();
}

Using Notifiers

You can create your own notifiers by implement IErrorNotifier interface and add notifier to Elmah options:

services.AddElmah<XmlFileErrorLog>(options =>
{
    options.Path = @"errors";
    options.LogPath = "~/logs";
    options.Notifiers.Add(new ErrorMailNotifier("Email",emailOptions));
});

Each notifier must have unique name.

Using Filters

You can use Elmah XML filter configuration in separate file, create and add custom filters:

services.AddElmah<XmlFileErrorLog>(options =>
{
    options.FiltersConfig = "elmah.xml";
    options.Filters.Add(new MyFilter());
})

Custom filter must implement IErrorFilter.
XML filter config example:

<?xml version="1.0" encoding="utf-8" ?>
<elmah>
	<errorFilter>
		<notifiers>
			<notifier name="Email"/>
		</notifiers>
		<test>
			<and>
				<greater binding="HttpStatusCode" value="399" type="Int32" />
				<lesser  binding="HttpStatusCode" value="500" type="Int32" />
			</and> 
		</test>
	</errorFilter>
</elmah>

see more here

JavaScript filters not yet impemented :(

Add notifiers to errorFilter node if you do not want to send notifications
Filtered errors will be logged, but will not be sent.

This project is licensed under the terms of the Apache license 2.0.

Using ElmahCore

ELMAH for Net.Standard and Net.Core

alt text

Add nuget package elmahcore

Simple usage

Startup.cs

1)	services.AddElmah() in ConfigureServices 
2)	app.UseElmah(); in Configure

app.UseElmah() must be after initializing other exception handling middleware, such as (UseExceptionHandler, UseDeveloperExceptionPage, etc.)

Default elmah path ~/elmah.

Change URL path

services.AddElmah(options => options.Path = "you_path_here")

Restrict access to the Elmah url

services.AddElmah(options =>
{
        options.OnPermissionCheck = context => context.User.Identity.IsAuthenticated;
});

Note: app.UseElmah(); needs to be after

app.UseAuthentication();
app.UseAuthorization();
app.UseElmah();

or the user will be redirected to the sign in screen even if he is authenticated.

Change Error Log type

You can create your own error log, which will store errors anywhere.

    class MyErrorLog: ErrorLog
    //implement ErrorLog

This ErrorLogs available in board:

  • MemoryErrorLog – store errors in memory (by default)
  • XmlFileErrorLog – store errors in XML files
  • SqlErrorLog - store errors in MS SQL (add reference to ElmahCore.Sql)
  • MysqlErrorLog - store errors in MySQL (add reference to ElmahCore.MySql)
  • PgsqlErrorLog - store errors in PostgreSQL (add reference to ElmahCore.Postgresql)
services.AddElmah<XmlFileErrorLog>(options =>
{
    options.LogPath = "~/log"; // OR options.LogPath = "с:\errors";
});
services.AddElmah<SqlErrorLog>(options =>
{
    options.ConnectionString = "connection_string";
});

Rise exception

public IActionResult Test()
{
    HttpContext.RiseError(new InvalidOperationException("Test"));
    ...
}

Microsoft.Extensions.Logging support

Since version 2.0 ElmahCore support Microsoft.Extensions.Logging
alt text

Source Preview

Since version 2.0.1 ElmahCore support source preview.
Just add paths to source files.

services.AddElmah(options =>
{
   options.SourcePaths = new []
   {
      @"D:\tmp\ElmahCore.DemoCore3",
      @"D:\tmp\ElmahCore.Mvc",
      @"D:\tmp\ElmahCore"
   };
});

Log the request body

Since version 2.0.5 ElmahCore can log the request body.
Just add paths to source files.

Using UseElmahExceptionPage

You can replace UseDeveloperExceptionPage to UseElmahExceptionPage

if (env.IsDevelopment())
{
   //app.UseDeveloperExceptionPage();
   app.UseElmahExceptionPage();
}

Using Notifiers

You can create your own notifiers by implement IErrorNotifier interface and add notifier to Elmah options:

services.AddElmah<XmlFileErrorLog>(options =>
{
    options.Path = @"errors";
    options.LogPath = "~/logs";
    options.Notifiers.Add(new ErrorMailNotifier("Email",emailOptions));
});

Each notifier must have unique name.

Using Filters

You can use Elmah XML filter configuration in separate file, create and add custom filters:

services.AddElmah<XmlFileErrorLog>(options =>
{
    options.FiltersConfig = "elmah.xml";
    options.Filters.Add(new MyFilter());
})

Custom filter must implement IErrorFilter.
XML filter config example:

<?xml version="1.0" encoding="utf-8" ?>
<elmah>
	<errorFilter>
		<notifiers>
			<notifier name="Email"/>
		</notifiers>
		<test>
			<and>
				<greater binding="HttpStatusCode" value="399" type="Int32" />
				<lesser  binding="HttpStatusCode" value="500" type="Int32" />
			</and> 
		</test>
	</errorFilter>
</elmah>

see more here

JavaScript filters not yet impemented :(

Add notifiers to errorFilter node if you do not want to send notifications
Filtered errors will be logged, but will not be sent.

NuGet packages (5)

Showing the top 5 NuGet packages that depend on ElmahCore:

Package Downloads
BizBlocks
BizBlocks AspNetCore Framework
UtilsCore.Elmah
Este paquete contiene las sgtes extensiones: - AddCoreElmah - UseCoreElmah
CesarBmx.Shared.Api
Common library (API layer)
UtilsCore.Logger
Package Description
MicroFramework.Core.Web
This is a personal framework, it writen by mahmoud savarian (sav68.net@gmail.com)

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on ElmahCore:

Repository Stars
dotnetzoom/AspNetCore-WebApi-Course
Professional REST API design with ASP.NET Core 3.1 WebAPI

Version History

Version Downloads Last updated
2.0.5 131 1/21/2021
2.0.4 195 1/20/2021
2.0.3 657 1/13/2021
2.0.2 704 12/28/2020
2.0.1 65 12/28/2020
2.0.0 220 12/25/2020
1.2.7 907 12/13/2020
1.2.6 91 12/13/2020
1.2.5 252,041 3/15/2019
1.2.4 16,302 2/5/2019
1.2.3 32,443 1/3/2019
1.2.2 1,247 12/17/2018
1.2.1 1,761 12/3/2018
1.2.0 7,972 10/9/2018
1.0.4 10,224 12/8/2017
1.0.3 564 12/8/2017
1.0.2 549 12/8/2017
1.0.1 507 12/8/2017
1.0.0 744 12/7/2017