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Raygun4Net

Raygun provider for .NET Framework

! IMPORTANT CHANGE IN 5.0 !

If you are manually referencing Raygun4Net dlls in your project rather than installing the NuGet package, then there are some minor dependency changes that you'll need to be aware of:

For Mvc projects, make sure your project references these dlls:

  • Mindscape.Raygun4Net
  • Mindscape.Raygun4Net.Mvc
  • Mindscape Raygun4Net4

For other .Net 4.0+ projects, make sure your project references these dlls:

  • Mindscape.Raygun4Net
  • Mindscape.Raygun4Net4

For both of the above setups, you can find all the correct dlls in the Mvc and Net4 folders respectively within the .zip file hosted on the latest GitHub release. If you build the Raygun4Net projects yourself with the build.bat script, all the correct dlls will be in the raygun4net/build/Mvc and raygun4net/build/Net4 folders. Or if you build the Raygun4Net projects in Visual Studio, all the correct dlls will be within the bin folder for each project.

If you are using Raygun4Net in a .Net project type not listed above, or if you are installing via NuGet, then you'll have no problems upgrading to version 5.0. There are no breaking changes in this version.

Installation

  • The easiest way to install this provider is by grabbing the NuGet package. Ensure the NuGet Visual Studio extension is installed, right-click on your project -> Manage NuGet Packages -> Online -> search for Mindscape.Raygun4Net, then install the appropriate package. Or, visit https://nuget.org/packages/Mindscape.Raygun4Net/ for instructions on installation using the package manager console.

  • For Visual Studio 2008 (without NuGet) you can clone this repository, run build.bat, then add project references to Mindscape.Raygun4Net.dll

  • If you have issues trying to install the package into a WinRT project, see the troubleshooting section below.

Supported platforms/frameworks

Projects built with the following frameworks are supported:

  • .NET 2.0, 3.5, 4.0+
  • .NET 3.5 and 4.0 Client Profile
  • .NET Core 1, 2
  • ASP.NET
  • Mvc
  • WebApi
  • WinForms, WPF, console apps etc
  • Windows Store apps (universal) for Windows 8.1 and Windows Phone 8.1
  • Windows 8
  • Windows Phone 7.1 and 8
  • WinRT
  • Xamarin.iOS and Xamarin.Mac (Both unified and classic)
  • Xamarin.Android

Install the NuGet package to a project which uses one of the above frameworks and the correct assembly will be referenced.

Where is my app API key?

When sending exceptions to the Raygun service, an app API key is required to map the messages to your application.

When you create a new application in your Raygun dashboard, your app API key is displayed at the top of the instructions page. You can also find the API key by clicking the "Application Settings" button in the side bar of the Raygun dashboard.

Namespace

The main classes can be found in the Mindscape.Raygun4Net namespace.

Usage

The Raygun4Net provider includes support for many .NET frameworks. Scroll down to find information about using Raygun for your type of application.

ASP.NET

Add a section to configSections:

<section name="RaygunSettings" type="Mindscape.Raygun4Net.RaygunSettings, Mindscape.Raygun4Net"/>

Add the Raygun settings configuration block from above:

<RaygunSettings apikey="YOUR_APP_API_KEY" />

Now you can either setup Raygun to send unhandled exceptions automatically or/and send exceptions manually.

To send unhandled exceptions automatically, use the RaygunHttpModule in web.config in the appropriate way for your application:

For system.web:

<httpModules>
  <add name="RaygunErrorModule" type="Mindscape.Raygun4Net.RaygunHttpModule"/>
</httpModules>

For system.webServer:

<modules>
  <add name="RaygunErrorModule" type="Mindscape.Raygun4Net.RaygunHttpModule"/>
</modules>

Anywhere in you code, you can also send exception reports manually simply by creating a new instance of the RaygunClient and call one of the Send or SendInBackground methods. This is most commonly used to send exceptions caught in a try/catch block.

try
{
  
}
catch (Exception e)
{
  new RaygunClient().SendInBackground(e);
}

Or to send exceptions in your own handlers rather than using the automatic setup above.

protected void Application_Error()
{
  var exception = Server.GetLastError();
  new RaygunClient().Send(exception);
}

####Additional ASP.NET configuration options

Exclude errors by HTTP status code

If using the HTTP module then you can exclude errors by their HTTP status code by providing a comma separated list of status codes to ignore in the configuration. For example if you wanted to exclude errors that return the I'm a teapot response code, you could use the configuration below.

<RaygunSettings apikey="YOUR_APP_API_KEY" excludeHttpStatusCodes="418" />

Exclude errors that originate from a local origin

Toggle this boolean and the HTTP module will not send errors to Raygun if the request originated from a local origin. i.e. A way to prevent local debug/development from notifying Raygun without having to resort to Web.config transforms.

<RaygunSettings apikey="YOUR_APP_API_KEY" excludeErrorsFromLocal="true" />

Remove sensitive request data

If you have sensitive data in an HTTP request that you wish to prevent being transmitted to Raygun, you can provide lists of possible keys (names) to remove. Keys to ignore can be specified on the RaygunSettings tag in web.config, (or you can use the equivalent methods on RaygunClient if you are setting things up in code). The available options are:

  • ignoreFormFieldNames
  • ignoreHeaderNames
  • ignoreCookieNames
  • ignoreServerVariableNames

These can be set to be a comma separated list of keys to ignore. Setting an option as * will indicate that all the keys will not be sent to Raygun. Placing * before, after or at both ends of a key will perform an ends-with, starts-with or contains operation respectively. For example, ignoreFormFieldNames="*password*" will cause Raygun to ignore all form fields that contain "password" anywhere in the name. These options are not case sensitive.

Providing a custom RaygunClient to the http module

Sometimes when setting up Raygun using the http module to send exceptions automatically, you may need to provide the http module with a custom RaygunClient instance in order to use some of the optional feature described at the end of this file. To do this, get your Http Application to implement the IRaygunApplication interface. Implement the GenerateRaygunClient method to return a new (or previously created) RaygunClient instance. The http module will use the RaygunClient returned from this method to send the unhandled exceptions. In this method you can setup any additional options on the RaygunClient instance that you need - more information about each feature is described at the end of this file.

MVC

As of version 4.0.0, Mvc support has been moved into a new NuGet package. If you have an Mvc project, please uninstall the Raygun4Net NuGet package and install the Mindscape.Raygun4Net.Mvc NuGet package instead. The NuGet package will include a readme containing everything you need to know about using it.

The Mvc and WebApi NuGet packages can be installed in the same project.

Web Api

As of version 4.0.0, WebApi support has been moved into a new NuGet package. If you have a WebApi project, please uninstall the Raygun4Net NuGet package and install the Mindscape.Raygun4Net.WebApi NuGet package instead.

Once the package is installed, go to the WebApiConfig class in your project. In the static Register method, call the static RaygunWebApiClient.Attach method.

RaygunWebApiClient.Attach(config);

Note that you may experience errors if you include the HTTP Module in the <system.web> section of your web.config. The HTTP module is only required if you are using MVC or regular ASP.NET - all WebApi errors are caught using RaygunWebApiClient.Attach.

To include the HTTP request details, pass in the current request message to the client's SetCurrentHTTPRequest method when manually sending exceptions.

try
{
  // Do something here that might go wrong
}
catch (Exception e)
{
  var client = new RaygunWebApiClient();
  client.SetCurrentHttpRequest(ActionContext.Request);
  client.SendInBackground(e);
}

The Mvc and WebApi NuGet packages can be installed in the same project safely.

WPF

Create an instance of RaygunClient by passing your app API key in the constructor. Attach an event handler to the DispatcherUnhandledException event of your application. In the event handler, use the RaygunClient.Send method to send the Exception.

private RaygunClient _client = new RaygunClient("YOUR_APP_API_KEY");

public App()
{
  DispatcherUnhandledException += OnDispatcherUnhandledException;
}

void OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
{
  _client.Send(e.Exception);
}

WinForms

Create an instance of RaygunClient by passing your app API key in the constructor. Attach an event handler to the Application.ThreadException event BEFORE calling Application.Run(...). In the event handler, use the RaygunClient.Send method to send the Exception.

private static readonly RaygunClient _raygunClient = new RaygunClient("YOUR_APP_API_KEY");

[STAThread]
static void Main()
{
  Application.EnableVisualStyles();
  Application.SetCompatibleTextRenderingDefault(false);

  Application.ThreadException += new ThreadExceptionEventHandler(Application_ThreadException);

  Application.Run(new Form1());
}

private static void Application_ThreadException(object sender, ThreadExceptionEventArgs e)
{
  _raygunClient.Send(e.Exception);
}

Windows Store Apps (Windows 8.1 and Windows Phone 8.1)

In the App.xaml.cs constructor (or any central entry point in your application), call the static RaygunClient.Attach method using your API key. This will catch and send all unhandled exception to Raygun for you.

public App()
{
  RaygunClient.Attach("YOUR_APP_API_KEY");
}

At any point after calling the Attach method, you can use RaygunClient.Current to get the static instance. This can be used for manually sending messages (via the Send methods) or changing options such as the User identity string.

You can manually send exceptions with the SendAsync method. When manually sending, currently the compiler does not allow you to use await in a catch block. You can however call SendAsync in a blocking way:

try
{
  throw new Exception("foo");
}
catch (Exception e)
{
  RaygunClient.Current.SendAsync(e);
}

WinRT

In the App.xaml.cs constructor (or any main entry point to your application), call the static RaygunClient.Attach method using your API key.

public App()
{
  RaygunClient.Attach("YOUR_APP_API_KEY");
}

At any point after calling the Attach method, you can use RaygunClient.Current to get the static instance. This can be used for manually sending messages (via the Send methods) or changing options such as the User identity string.

Limitations of WinRT UnhandledException event and Wrap() workarounds

The options available in WinRT for catching unhandled exceptions at this point in time are more limited compared to the options in the more mature .NET framework. The UnhandledException event will be raised when invalid XAML is parsed, in addition to other runtime exceptions that happen on the main UI thread. While many errors will be picked up this way and therefore be able to be sent to Raygun, others will be missed by this exception handler. In particular asynchronous code or Tasks that execute on background threads will not have their exceptions caught.

A workaround for this issue is provided with the Wrap() method. These allow you to pass the code you want to execute to an instance of the Raygun client - it will simply call it surrounded by a try-catch block. If the method you pass in does result in an exception being thrown this will be transmitted to Raygun, and the exception will again be thrown. Two overloads are available; one for methods that return void and another for methods that return an object.

Fody

Another option is to use the Fody library, and its AsyncErrorHandler extension. This will automatically catch async exceptions and pass them to a handler of your choice (which would send to Raygun as above). See the installation instructions here, then check out the sample project for how to use.

Windows Phone 7.1 and 8

In the App.xaml.cs constructor (or any main entry point to your application), call the static RaygunClient.Attach method using your API key.

RaygunClient.Attach("YOUR_APP_API_KEY");

At any point after calling the Attach method, you can use RaygunClient.Current to get the static instance. This can be used for manually sending messages (via the Send methods) or changing options such as the User identity string.

Xamarin for Android

In the main/entry Activity of your application, use the static RaygunClient.Attach method using your app API key. There is also an overload for the Attach method that lets you pass in a user-identity string which is useful for tracking affected users in your Raygun dashboard.

RaygunClient.Attach("YOUR_APP_API_KEY");

At any point after calling the Attach method, you can use RaygunClient.Current to get the static instance. This can be used for manually sending messages or changing options such as the User identity string.

Xamarin for iOS

In the main entry point of the application, use the static RaygunClient.Attach method using your app API key.

static void Main(string[] args)
{
  RaygunClient.Attach("YOUR_APP_API_KEY");

  UIApplication.Main(args, null, "AppDelegate");
}

There is also an overload for the Attach method that lets you enable native iOS crash reporting.

static void Main(string[] args)
{
  RaygunClient.Attach("YOUR_APP_API_KEY", true, true);

  UIApplication.Main(args, null, "AppDelegate");
}

The first boolean parameter is simply to enable the native iOS error reporting. The second boolean parameter is whether or not to hijack some of the native signals – this is to solve the well known iOS crash reporter issue where null reference exceptions within a try/catch block can cause the application to crash. By setting the second boolean parameter to true, the managed code will take over the SIGBUS and SIGSEGV iOS signals which solves the null reference issue. Doing this however prevents SIGBUS and SIGSEGV native errors from being detected, meaning they don’t get sent to Raygun. This is why we provide this as an option – so if you don’t have any issues with null reference exceptions occurring within try/catch blocks and you want to maximize the native errors that you can be notified of, then set the second boolean parameter to false.

At any point after calling the Attach method, you can use RaygunClient.Current to get the static instance. This can be used for manually sending messages or changing options such as the User identity string.

Xamarin for Mac

In the main entry point of the application, use the static RaygunClient.Attach method using your app API key.

static void Main(string[] args)
{
  RaygunClient.Attach("YOUR_APP_API_KEY");

  NSApplication.Init();
  NSApplication.Main(args);
}

At any point after calling the Attach method, you can use RaygunClient.Current to get the static instance. This can be used for manually sending messages or changing options such as the User identity string.

Additional features for all .Net frameworks:

Modify or cancel message

On a RaygunClient instance, attach an event handler to the SendingMessage event. This event handler will be called just before the RaygunClient sends an exception - either automatically or manually. The event arguments provide the RaygunMessage object that is about to be sent. One use for this event handler is to add or modify any information on the RaygunMessage. Another use for this method is to identify exceptions that you never want to send to raygun, and if so, set e.Cancel = true to cancel the send.

Strip wrapper exceptions

If you have common outer exceptions that wrap a valuable inner exception which you'd prefer to group by, you can specify these by using the multi-parameter method:

raygunClient.AddWrapperExceptions(typeof(TargetInvocationException));

In this case, if a TargetInvocationException occurs, it will be removed and replaced with the actual InnerException that was the cause. Note that HttpUnhandledException and TargetInvocationException are already added to the wrapper exception list; you do not have to add these manually. This method is useful if you have your own custom wrapper exceptions, or a framework is throwing exceptions using its own wrapper.

Affected user tracking

There is a property named User on RaygunClient which you can set to be the current user's ID. This allows you to see the count of affected users for each error in the Raygun dashboard.

If you want more detailed information about users (and the ability to use the new Affected User reporting feature when it is released), you can set the UserInfo property on the RaygunClient to a new RaygunIdentifierMessage object. This class has a number of properties on it to help identifier the user who experienced a crash.

Make sure to abide by any privacy policies that your company follows when using this feature.

Properties

The only required field is Identifier.

Identifier is the unique identifier from your system for this user.

IsAnonymous is a flag indicating whether the user is logged in (or identifiable) or if they are anonymous. An anonymous user can still have a unique identifier.

Email The user's email address. If you use email addresses to identify your users, feel free to set the identifier to their email and leave this blank, as we will use the identifier as the email address if it looks like one, and no email address is not specified.

FullName The user's full name.

FirstName The user's first (or preferred) name.

UUID A device identifier. Could be used to identify users across devices, or machines that are breaking for many users.

Usage

raygunClient.User = "[email protected]";
// OR
raygunClient.UserInfo = new RaygunIdentifierMessage("[email protected]")
{
  IsAnonymous = false,
  FullName = "Robbie Raygun",
  FirstName = "Robbie"
};

Version numbering

By default, Raygun will send the assembly version of your project with each report. If you are using WinRT, the transmitted version number will be that of the Windows Store package, set in Package.appxmanifest (under Packaging).

If you need to provide your own custom version value, you can do so by setting the ApplicationVersion property of the RaygunClient (in the format x.x.x.x where x is a positive integer).

Tags and custom data

When sending exceptions manually, you can also send an arbitrary list of tags (an array of strings), and a collection of custom data (a dictionary of any objects). This can be done using the various Send and SendInBackground method overloads.

Proxy settings

The Raygun4NET provider uses the default Windows proxy settings (as set in Internet Explorer's Connection tab, or Web.config) when sending messages to the Raygun API. If your proxy requires authentication credentials, you can provide these by setting the ProxyCredentials property after instantiating a RaygunClient, then using it to send later:

var raygunClient = new RaygunClient()
{
  ProxyCredentials = new NetworkCredential("user", "pword")
};

Custom grouping keys

You can provide your own grouping key if you wish. We only recommend this you're having issues with errors not being grouped properly.

On a RaygunClient instance, attach an event handler to the CustomGroupingKey event. This event handler will be called after Raygun has built the RaygunMessage object, but before the SendingMessage event is called. The event arguments provide the RaygunMessage object that is about to be sent, and the original exception that triggered it. You can use anything you like to generate the key, and set it by CustomGroupingKey property on the event arguments. Setting it to null or empty string will leave the exception to be grouped by Raygun, setting it to something will cause Raygun to group it with other exceptions you've sent with that key.

The key has a maximum length of 100.

Troubleshooting

  • If the solution fails to build due to missing dependencies, in Visual Studio 2012 ensure you have the NuGet extension installed and that the Tools -> Options -> Package Manager -> 'Allow NuGet to download missing packages during build' box is checked. Then, go to the directory that you cloned this repository into and run build.bat.

  • When installing the package via NuGet into a WinRT project you encounter an error due to an invalid dependency, clone this repository into a directory via Git. Then, open a Powershell or command prompt in the directory location, and run .\build.bat CompileWinRT. Then, add the resulting Mindscape.Raygun4Net.WinRT.dll (located in the /release folder) to your project.

Raygun4Net does not send crash reports and there are no errors to help troubleshoot why this is happening

  • Raygun4net has the throwOnError property set to false by default. The first thing is to allow what ever error occurring in Raygun4Net to bubble up the stack and be reported as an unhandled exception, so add this attribute in the raygun4Net Config section or enable it in the config options of the client.
    <RaygunSettings apikey="[Raygun4Net api key goes here]" throwOnError="ture"/>
  • These errors will start going to the event viewer or you could attach a trace listener and have them logged to a text file as well
  • There are many reasons why crash reports may not be sent through. In the Event that the error message mentions “The underlying connection was closed: An unexpected error occurred on a send.” This is probably a TLS handshake issue. Confirm this by inspecting the inner exception or the rest of the trace and look for cipher mismatch phrase. This will be a clear indication that there is a TLS issue. - To Resolve this Add the following global config where it is most convenient e.g. Global.asax ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12 Taking care not to include the less secure protocols like SSL3 and to some extent the TLS1.1.

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