CODEWITHSUNDEEP
asp.net-web-api
user3196119
user3196119

Reputation: 31

Web API ExceptionLogger

I am using IExceptionLogger and ExceptionHandler for logging and error handling globally for my web api service.

Now Is there any way to read the POST data from ExceptionLoggerContext context. ? Just because i would like to save the POST data along with exception details.

Upvotes: 3

Views: 1945

Answers (1)

LeftyX
LeftyX

Reputation: 35597

The only way I've found is to parse the ExceptionLoggerContext.ExceptionContext in your ExceptionLogger/IExceptionLogger implementation.

ExceptionLoggerContext.ExceptionContext is of type System.Web.Http.ExceptionHandling.ExceptionContext.

There are a few nested objects you have to navigate, but at some point, you will find:

((System.Web.Http.ApiController)exceptionContext.ControllerContext.Controller).ActionContext.ActionArguments

which contains a ValueCollection with all the arguments of your FORM.

In my solution I've implemented something like this:

public class MyExceptionContext
    {
    public Dictionary<string, object>.ValueCollection ActionArguments { get; set; }

    public MyExceptionContext(System.Web.Http.ExceptionHandling.ExceptionContext exceptionContext)
    {
        try
        {
        this.ActionArguments = ((System.Web.Http.ApiController)exceptionContext.ControllerContext.Controller).ActionContext.ActionArguments.Values;
        }
        catch (Exception)
        {
        }
    }
}

I pass my constructor ExceptionLoggerContext.ExceptionContext; it will populate the dictionary ActionArguments with all the values posted.

You can find a demo project on Github. It's a self-hosted (owin) web.api application. In my Startup I've defined my custom implementation of IExceptionLogger and IExceptionHandler.

In this sample app I've used Serilog to stream exception on disk.

If you try to post a form to the test controller, I'll throw an exception which will be trapped by a global handler and persisted on the file system with some info.

If you download and run the example found in Github you can use Fiddler to test it:

POST http://localhost:9667/api/exception HTTP/1.1
User-Agent: Fiddler
Content-Type: application/x-www-form-urlencoded
Host: localhost:9667
Content-Length: 40

username=stackoverflow&password=password

Upvotes: 5

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