Embed Provider for Gist

GistEmbedProvider.cs

using System.Collections.Generic;
using System.Dynamic;
using System.Net.Http;
using System.Net.Http.Json;
using System.Text;
using Umbraco.Cms.Core.Media;
using Umbraco.Cms.Core.Media.EmbedProviders;
using Umbraco.Cms.Core.Serialization;


namespace Umbraco.TechCommunityDayDemo.EmbedProvider
{
    public class GistEmbedProvider : OEmbedProviderBase
    {
        private readonly HttpClient _httpClient;
        public GistEmbedProvider(IJsonSerializer jsonSerializer, HttpClient httpClient) : base(jsonSerializer)
        {
            _httpClient = httpClient;
        }

        public override string ApiEndpoint => "https://api.github.com/";

        public override string[] UrlSchemeRegex => new string[]
        {
            @"gists/*"
        };

        public override Dictionary<string, string> RequestParams=> new Dictionary<string, string>();       

        public override string GetMarkup(string url, int maxWidth = 0, int maxHeight = 0)
        {
            var markup = "<div class=\"gist-markup\">{0}<div>";
            //gists/f6784cdcfeedfea792ec2f640df375be

            using (_httpClient)
            {
                _httpClient.DefaultRequestHeaders.Add("user-agent", "umbraco");

                var gistResponse = _httpClient.GetFromJsonAsync<GistResponse>(ApiEndpoint+url).Result;

                var gistResponseMarkUp = new StringBuilder();
                              
               if(gistResponse != null && gistResponse.Files!= null && gistResponse.Files.Keys.Count > 0)
                {
                    foreach (var file in gistResponse.Files)
                    {
                        gistResponseMarkUp.Append($"<div class=\"gist-markup-heading\">{file.Key}</div>");
                        gistResponseMarkUp.Append($"<div class=\"gist-markup-content\">{file.Value.Content}</div>");
                    }                    
                }
                markup = string.Format(markup, gistResponseMarkUp.ToString());
            }


            return markup;
        }
    }
}

GistResponse.cs

using System;
using System.Collections.Generic;

namespace Umbraco.TechCommunityDayDemo.EmbedProvider
{

    public class GistResponse
    {       
        public Dictionary<string, GistFile> Files { get; set; }
        public Owner Owner { get; set; }
    }
  
    public class GistFile
    {
        public string Filename { get; set; }
        public string Type { get; set; }
        public string Language { get; set; }
        public Uri RawUrl { get; set; }
        public long Size { get; set; }
        public bool Truncated { get; set; }
        public string Content { get; set; }
    }
    public class Owner
    {
        public string Login { get; set; }
        public long Id { get; set; }
        public string NodeId { get; set; }
        public Uri AvatarUrl { get; set; }
        public string GravatarId { get; set; }
        public Uri Url { get; set; }
        public Uri HtmlUrl { get; set; }
        public Uri FollowersUrl { get; set; }
        public string FollowingUrl { get; set; }
        public string GistsUrl { get; set; }
        public string StarredUrl { get; set; }
        public Uri SubscriptionsUrl { get; set; }
        public Uri OrganizationsUrl { get; set; }
        public Uri ReposUrl { get; set; }
        public string EventsUrl { get; set; }
        public Uri ReceivedEventsUrl { get; set; }
        public string Type { get; set; }
        public bool SiteAdmin { get; set; }
    }
}