using CefSharp; using System; using System.Collections.Generic; using System.Diagnostics; using System.IO; using System.Net; using System.Windows.Forms; using CefSharp.WinForms; using TweetDuck.Core.Other; namespace TweetDuck.Core.Utils{ static class BrowserUtils{ public static string HeaderAcceptLanguage => "en-us,en"; public static string HeaderUserAgent => Program.BrandName+" "+Application.ProductVersion; public static void SetupCefArgs(IDictionary<string, string> args){ if (!Program.SystemConfig.HardwareAcceleration){ args["disable-gpu"] = "1"; args["disable-gpu-vsync"] = "1"; } args["disable-pdf-extension"] = "1"; args["disable-plugins-discovery"] = "1"; args["enable-system-flash"] = "0"; if (args.TryGetValue("js-flags", out string jsFlags)){ args["js-flags"] = "--expose-gc "+jsFlags; } else{ args["js-flags"] = "--expose-gc"; } } public static ChromiumWebBrowser AsControl(this IWebBrowser browserControl){ return (ChromiumWebBrowser)browserControl; } public static DefaultResourceHandlerFactory GetHandlerFactory(this ChromiumWebBrowser browser){ return (DefaultResourceHandlerFactory)browser.ResourceHandlerFactory; } private const string TwitterTrackingUrl = "t.co"; public enum UrlCheckResult{ Invalid, Tracking, Fine } public static UrlCheckResult CheckUrl(string url){ if (Uri.TryCreate(url, UriKind.Absolute, out Uri uri)){ string scheme = uri.Scheme; if (scheme == Uri.UriSchemeHttps || scheme == Uri.UriSchemeHttp || scheme == Uri.UriSchemeFtp || scheme == Uri.UriSchemeMailto){ return uri.Host == TwitterTrackingUrl ? UrlCheckResult.Tracking : UrlCheckResult.Fine; } } return UrlCheckResult.Invalid; } public static void OpenExternalBrowser(string url){ if (string.IsNullOrWhiteSpace(url))return; switch(CheckUrl(url)){ case UrlCheckResult.Fine: if (FormGuide.CheckGuideUrl(url, out string hash)){ FormGuide.Show(hash); } else{ WindowsUtils.OpenAssociatedProgram(url); } break; case UrlCheckResult.Tracking: if (FormMessage.Warning("Blocked URL", "TweetDuck has blocked a tracking url due to privacy concerns. Do you want to visit it anyway?\n"+url, FormMessage.Yes, FormMessage.No)){ WindowsUtils.OpenAssociatedProgram(url); } break; case UrlCheckResult.Invalid: FormMessage.Warning("Blocked URL", "A potentially malicious URL was blocked from opening:\n"+url, FormMessage.OK); break; } } public static string GetFileNameFromUrl(string url){ string file = Path.GetFileName(new Uri(url).AbsolutePath); return string.IsNullOrEmpty(file) ? null : file; } public static string GetErrorName(CefErrorCode code){ return StringUtils.ConvertPascalCaseToScreamingSnakeCase(Enum.GetName(typeof(CefErrorCode), code) ?? string.Empty); } public static WebClient CreateWebClient(){ WebClient client = new WebClient{ Proxy = null }; client.Headers[HttpRequestHeader.UserAgent] = HeaderUserAgent; return client; } public static WebClient DownloadFileAsync(string url, string target, Action onSuccess, Action<Exception> onFailure){ WebClient client = CreateWebClient(); client.DownloadFileCompleted += (sender, args) => { if (args.Cancelled){ try{ File.Delete(target); }catch{ // didn't want it deleted anyways } } else if (args.Error != null){ onFailure?.Invoke(args.Error); } else{ onSuccess?.Invoke(); } }; client.DownloadFileAsync(new Uri(url), target); return client; } public static int Scale(int baseValue, double scaleFactor){ return (int)Math.Round(baseValue*scaleFactor); } public static void SetZoomLevel(IBrowser browser, int percentage){ browser.GetHost().SetZoomLevel(Math.Log(percentage/100.0, 1.2)); } #if DEBUG public static void HandleConsoleMessage(object sender, ConsoleMessageEventArgs e){ Debug.WriteLine("[Console] {0} ({1}:{2})", e.Message, e.Source, e.Line); } #endif } }