How do I use FluentValidation alongside Swagger in .NET Web API application? - asp.net-web-api

Question

I have a .NET Web API project. I was able to add Swagger by installing the Swashbuckle NuGet package. Swagger now makes a nice web page that provides documentation and ability to test by going to this url:
http://localhost:20475/product-catalog-api/swagger/ui/index
This part works great. However, when I add FluentValidation and set it up in the WebApiConfig.cs, all of the requests to my site get high-jacked and instead of seeing the Swagger html page, I only get a JSON with an empty response.
I used this article by Matthew Jones to set up FluentValidation:
http://www.exceptionnotfound.net/custom-validation-in-asp-net-web-api-with-fluentvalidation/
Here is what my web api config looks like:
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
config.Filters.Add(new ValidateModelStateFilter());
config.MessageHandlers.Add(new ResponseWrappingHandler());
// Web API routes
config.MapHttpAttributeRoutes();
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: Version + "/{action}",
defaults: new {controller = "Main"}
);
FluentValidationModelValidatorProvider.Configure(config);
}
I could trigger the FluentValidation manually in every web service method, but I would like to have a generic solution like Matthew Jones did with the Filters and MessageHandlers. Basically what I want to do is say IF the request is for swagger-ui then do not route through FluentValidation.

Answer 1

I ended up adding this code inside ResponseWrappingHandler. There may be a more elegant way, but this worked for me. This causes the swagger page request to kick out of the FluentValidation hook.
if (request.RequestUri.AbsolutePath.Contains("swagger"))
{
return response;
}