Cefsharp 多次打开多个网页后,经常会发生冻结
我正在开发一个网络爬虫,将经常要求新的网页。在测试过程中,程序经常冻结 我已经编写了一个测试用例,解释了我的用法和出现问题的场景 有时候,当它打开一个网页10次时,当它打开20次时,它可能会被卡住。它打开网页多少次,我不确定Cefsharp 多次打开多个网页后,经常会发生冻结,cefsharp,Cefsharp,我正在开发一个网络爬虫,将经常要求新的网页。在测试过程中,程序经常冻结 我已经编写了一个测试用例,解释了我的用法和出现问题的场景 有时候,当它打开一个网页10次时,当它打开20次时,它可能会被卡住。它打开网页多少次,我不确定 using CefSharp; using CefSharp.WinForms; using System; using System.Windows.Forms; namespace WindowsFormsApp2 { public partial class
using CefSharp;
using CefSharp.WinForms;
using System;
using System.Windows.Forms;
namespace WindowsFormsApp2
{
public partial class Form1 : Form
{
ChromiumWebBrowser browser;
System.Timers.Timer timer;
int i = 1;
public Form1()
{
InitializeComponent();
timer = new System.Timers.Timer(400) { AutoReset = true };//Timer, automatically open a new web page
timer.Elapsed += Timer_Elapsed;
browser = new ChromiumWebBrowser("www.baidu.com") { Parent = splitContainer1.Panel1, Dock = DockStyle.Fill };
browser.LifeSpanHandler = new LifeSpanHandler(splitContainer1.Panel2);
browser.FrameLoadEnd += Browser_FrameLoadEnd;
}
private void Browser_FrameLoadEnd(object sender, FrameLoadEndEventArgs e)
{
if (e.Frame.IsMain == false) return;
timer.Start();
}
private void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
i = i > 1 ? 1 : i + 1;
browser.ExecuteScriptAsync("document.getElementsByClassName('mnav c-font-normal c-color-t')[" + (i) + "].click()");//Open a link in the web page
}
}
class LifeSpanHandler : ILifeSpanHandler
{
Control host;
internal LifeSpanHandler(Control host)
{
this.host = host;
}
public bool DoClose(IWebBrowser chromiumWebBrowser, IBrowser browser)
{
return false;
}
public void OnAfterCreated(IWebBrowser chromiumWebBrowser, IBrowser browser)
{
}
public void OnBeforeClose(IWebBrowser chromiumWebBrowser, IBrowser browser)
{
}
public bool OnBeforePopup(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, string targetUrl, string targetFrameName, WindowOpenDisposition targetDisposition, bool userGesture, IPopupFeatures popupFeatures, IWindowInfo windowInfo, IBrowserSettings browserSettings, ref bool noJavascriptAccess, out IWebBrowser newBrowser)
{
newBrowser = null;
var webBrowser = (ChromiumWebBrowser)chromiumWebBrowser;
webBrowser.Invoke(new Action(() =>
{
if (host.HasChildren) host.Controls[0].Dispose();
var control = new Control { Parent = host, Dock = DockStyle.Fill };
control.CreateControl();
windowInfo.SetAsChild(control.Handle);
}));
return false;
}
}
}
测试代码放在GitHub上,GitHub是VisualStudio2019项目。我们希望您可以在本地执行该项目,以便更直观地发现问题。多谢各位
你在其他网站上测试过吗
对其他网站的频繁请求也可能导致死锁
问题是否会在github.com/cefsharp/cefsharp.com上重现
github.com/cefsharp/cefsharp.example不会重现此问题
在BrowserTabUserControl.cs中
browser.LifeSpanHandler = new LifeSpanHandler(openPopupsAsTabs: false);
默认情况下,它会在新窗口中打开一个网页。频繁打开多个网页时,冻结问题不会重现
我将OpenPopusAstabs更改为true,并在选项卡中打开一个新页面
browser.LifeSpanHandler = new LifeSpanHandler(openPopupsAsTabs: true);
频繁打开多个网页,程序将冻结。
程序在dispose方法中冻结:
System.Windows.Forms .dll! System.Windows.Forms . UnsafeNativeMethods.DestroyWindow (
System.Runtime.InteropServices . handleref hWnd) unknown
System.Windows.Forms .dll! System.Windows.Forms . NativeWindow.DestroyHandle () unknown
System.Windows.Forms .dll! System.Windows.Forms . Control.DestroyHandle () unknown
System.Windows.Forms .dll! System.Windows.Forms . Control.Dispose (bool disposing) unknown
System.dll ! System.ComponentModel.Component . dispose() unknown
有时程序突然退出,出现异常:
Exception thrown:“ System.IO.PipeException ”(located at System.ServiceModel.dll (2)
Exception thrown:“ System.ServiceModel.CommunicationException ”(located at System.ServiceModel.dll (2)
Exception thrown:“ System.ServiceModel.CommunicationException ”(located at System.ServiceModel.dll (2)
Exception thrown:“ System.ServiceModel.CommunicationException ”(located at System.ServiceModel.dll (2)
Exception thrown:“ System.ServiceModel.CommunicationException ”(located at System.ServiceModel.Internals . DLL)
Exception thrown:“ System.ServiceModel.CommunicationException ”(located at System.ServiceModel.Internals . DLL)
Exception thrown:“ System.ServiceModel.CommunicationObjectFaultedException ”(located at System.ServiceModel.dll (2)
有时,当它打开一个网页10次时,当它打开20次时,它可能会被卡住,这到底是什么意思?什么意思(有时,当它打开一个网页10次时,它打开20次时,它可能会被卡住)?
对不起,我的意思是,当程序冻结时,打开的页面数量是不确定的。有时,当它打开10个网页时,它会冻结。有时候,它会在打开20页后冻结。简而言之,程序反复打开网页,死锁的可能性很高。你可以下载,代码是vs2019项目。非常感谢。它的行为如何?你手动注释掉计时器和性能链接点击?可能是新行问题。实际代码没有被注释掉。该页面通过计时器自动单击。我也尝试过频繁地手动点击链接,程序也冻结了。