C# 利用 Geckofx-60 实现下载

利用 Geckofx-60 实现下载

方案1. 根据Url直接下载

private void GeckoDownload(string url, string fileFullName)
{
    if (System.IO.File.Exists(fileFullName))
    { 
    System.IO.File.Delete(fileFullName);
    }

    Stream myStream = System.IO.File.Create(fileFullName);
    nsIURI source = IOService.CreateNsIUri(url);
    nsIURI dest = IOService.CreateNsIUri(new Uri(fileFullName).AbsoluteUri);
    nsAStringBase t = (nsAStringBase)new nsAString(System.IO.Path.GetFileName(fileFullName));
    nsIWebBrowserPersist persist = Xpcom.CreateInstance<nsIWebBrowserPersist>("@mozilla.org/embedding/browser/nsWebBrowserPersist;1");
    nsITransfer nst = Xpcom.CreateInstance<nsITransfer>("@mozilla.org/transfer;1");
    nst.Init(source, dest, t, null, 0, null, persist, false);

    if (nst != null)
    {
        persist.SetPersistFlagsAttribute(2 | 32 | 16384);
        persist.SetProgressListenerAttribute((nsIWebProgressListener)nst);
        persist.SaveURI(source, null, null, (uint)Gecko.nsIHttpChannelConsts.REFERRER_POLICY_NO_REFERRER, null, null, (nsISupports)dest, null);
    }    

    myStream.Close();
}

方案2. 弹出对话框提示下载

public MainWindow()
{
    InitializeComponent();
    Gecko.Xpcom.Initialize("Firefox");
    Gecko.GeckoPreferences.User["intl.accept_languages"] = "zh-CN,zh;q=0.9,en;q=0.8";
    _GeckoWebBrowser = new Gecko.GeckoWebBrowser();
    _GeckoWebBrowser.CreateControl();
    _GeckoWebBrowser.NoDefaultContextMenu = true; //禁用右键菜
    _GeckoWebBrowser.DocumentCompleted += _GeckoWebBrowser_DocumentCompleted;
    WindowsFormsHost.Child = _GeckoWebBrowser;
    
    // 弹出下载对话框
    Gecko.LauncherDialog.Download += new EventHandler<LauncherDialogEvent>(LauncherDialog_Download)
}

// 实现弹出对话框触发事件
private void LauncherDialog_Download(object sender, Gecko.LauncherDialogEvent e)
{
    nsILocalFileWin objTarget = Xpcom.CreateInstance<Gecko.nsILocalFileWin>("@mozilla.org/file/local;1");
    using (nsAString tmp = new nsAString(@Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\temp.tmp"))
    {
        objTarget.InitWithPath(tmp);
    }
    //Save file dialog
    Stream myStream;
    SaveFileDialog saveFileDialog1 = new SaveFileDialog();
    saveFileDialog1.Filter = "All files (*.*)|*.*";
    saveFileDialog1.FilterIndex = 2;
    saveFileDialog1.RestoreDirectory = true;
    saveFileDialog1.FileName = e.Filename;
    if (saveFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
    {    
        if ((myStream = saveFileDialog1.OpenFile()) != null)
        {
            nsIURI source = IOService.CreateNsIUri(e.Url);
            nsIURI dest = IOService.CreateNsIUri(new Uri(@saveFileDialog1.FileName).AbsoluteUri);
            nsAStringBase t = (nsAStringBase)new nsAString(System.IO.Path.GetFileName(@saveFileDialog1.FileName));
            nsIWebBrowserPersist persist = Xpcom.CreateInstance<nsIWebBrowserPersist>("@mozilla.org/embedding/browser/nsWebBrowserPersist;1");
            nsITransfer nst = Xpcom.CreateInstance<nsITransfer>("@mozilla.org/transfer;1");
            nst.Init(source, dest, t, e.Mime, 0, null, persist, false);
            if (nst != null)
            {
                persist.SetPersistFlagsAttribute(2 | 32 | 16384);
                persist.SetProgressListenerAttribute((nsIWebProgressListener)nst);
                persist.SaveURI(source, null, null, (uint)Gecko.nsIHttpChannelConsts.REFERRER_POLICY_NO_REFERRER, null, null, (nsISupports)dest, null);
            }
            myStream.Close();
        }
    }
}