WebDeleter.cs

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Security.Cryptography.X509Certificates;
using System.Threading.Tasks;
using Waher.Content.Getters;
using Waher.Runtime.Inventory;
 
namespace Waher.Content.Deleters
{
    public class WebDeleter : DeleterBase
    {
        public WebDeleter()
        {
        }
 
        public override string[] UriSchemes => new string[] { "http", "https" };
 
        public override bool CanDelete(Uri Uri, out Grade Grade)
        {
            switch (Uri.Scheme.ToLower())
            {
                case "http":
                case "https":
                    Grade = Grade.Ok;
                    return true;
 
                default:
                    Grade = Grade.NotAtAll;
                    return false;
            }
        }
 
        public override async Task<object> DeleteAsync(Uri Uri, X509Certificate Certificate,
            RemoteCertificateEventHandler RemoteCertificateValidator, int TimeoutMs, params KeyValuePair<string, string>[] Headers)
        {
            HttpClientHandler Handler = WebGetter.GetClientHandler(Certificate, RemoteCertificateValidator);
            using (HttpClient HttpClient = new HttpClient(Handler, true)
            {
                Timeout = TimeSpan.FromMilliseconds(TimeoutMs)
            })
            {
                using (HttpRequestMessage Request = new HttpRequestMessage()
                {
                    RequestUri = Uri,
                    Method = HttpMethod.Delete
                })
                {
                    WebGetter.PrepareHeaders(Request, Headers, Handler);
 
                    HttpResponseMessage Response = await HttpClient.SendAsync(Request);
 
                    return await WebGetter.ProcessResponse(Response, Uri);
                }
            }
        }
    }
}