尝试读取Web.config Config部分时发生转换错误

Question

I am trying to find out if it's possible to configure ServiceStack to authenticate a call using an API key in the host header?

I have found an example here: http://rossipedia.com/blog/2013/03/06/simple-api-key-authentication-with-servicestack/

but for some reason in my Clients.cs, which looks like this:

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;

namespace Servicestack_MVC.Models
{
public static class Clients
{
    private static Lazy<ClientSection> section = new Lazy<ClientSection>(() =>
          (ClientSection)ConfigurationManager.GetSection("apiClients"));

    public static bool VerifyKey(string apiKey)
    {
        return section.Value.Cast<ClientSection.ClientElement>()
               .SingleOrDefault(ce => ce.ApiKey == apiKey);
    }
}

}

I get the errors:

Error 9 Instance argument: cannot convert from 'Servicestack_MVC.Models.ClientSection' to 'System.Linq.IQueryable' and

Error 10 'Servicestack_MVC.Models.ClientSection' does not contain a definition for 'Cast' and the best extension method overload 'System.Linq.Queryable.Cast(System.Linq.IQueryable)' has some invalid arguments

In the section of web.config I have added:

<section name="apiClients" type="ClientSection" requirePermission="false"/>

and added the section

<apiClients>
  <clients>
    <client name="Client1" apiKey="somelongrandomkey" />
    <client name="Client2" apiKey="somelongrandomkey" />
    <!-- etc -->
  </clients>
</apiClients>

Can anyone tell me what I am doing wrong please?

Many thanks

Answer 1

That's actually an error on my post. It's been fixed. The actual code should look like this:

public static bool VerifyKey(string apiKey)
{
    return section.Value.Cast<ClientSection.ClientElement>()
           .Any(ce => ce.ApiKey == apiKey);
}

Also, your configuration section handler needs to be fully qualified. From the looks of it, it seems you have placed the code in the Servicestack_MVC.Models namespace.

In that case, your <section> tag needs to look like this:

<section name="apiClients" type="Servicestack_MVC.Models.ClientSection" requirePermission="false"/>

Hope that helps!