TweetDuck/Browser/Handling/ResourceRequestHandlerBrowser.cs

using CefSharp;
using TweetDuck.Browser.Handling.Filters;
using TweetDuck.Utils;
using TweetLib.Core.Features.Twitter;

namespace TweetDuck.Browser.Handling {
	class ResourceRequestHandlerBrowser : ResourceRequestHandlerBase {
		private const string UrlVendorResource = "/dist/vendor";
		private const string UrlLoadingSpinner = "/backgrounds/spinner_blue";
		private const string UrlVersionCheck = "/web/dist/version.json";

		protected override CefReturnValue OnBeforeResourceLoad(IWebBrowser browserControl, IBrowser browser, IFrame frame, IRequest request, IRequestCallback callback) {
			if (request.ResourceType == ResourceType.MainFrame) {
				if (request.Url.EndsWith("//twitter.com/")) {
					request.Url = TwitterUrls.TweetDeck; // redirect plain twitter.com requests, fixes bugs with login 2FA
				}
			}
			else if (request.ResourceType == ResourceType.Image) {
				if (request.Url.Contains(UrlLoadingSpinner)) {
					request.Url = TwitterUtils.LoadingSpinner.Url;
				}
			}
			else if (request.ResourceType == ResourceType.Script) {
				string url = request.Url;

				if (url.Contains("analytics.")) {
					callback.Dispose();
					return CefReturnValue.Cancel;
				}
				else if (url.Contains(UrlVendorResource)) {
					request.SetHeaderByName("Accept-Encoding", "identity", overwrite: true);
				}
			}
			else if (request.ResourceType == ResourceType.Xhr) {
				if (request.Url.Contains(UrlVersionCheck)) {
					callback.Dispose();
					return CefReturnValue.Cancel;
				}
			}

			return base.OnBeforeResourceLoad(browserControl, browser, frame, request, callback);
		}

		protected override IResponseFilter GetResourceResponseFilter(IWebBrowser browserControl, IBrowser browser, IFrame frame, IRequest request, IResponse response) {
			if (request.ResourceType == ResourceType.Script && request.Url.Contains(UrlVendorResource) && int.TryParse(response.Headers["Content-Length"], out int totalBytes)) {
				return new ResponseFilterVendor(totalBytes);
			}

			return base.GetResourceResponseFilter(browserControl, browser, frame, request, response);
		}
	}
}