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四、cefsharp截取request参数
所有的request数据都可以在接口类IRequestHandler的方法中获取到，不过要先实现这些方法。
1、添加类 RequestHandler，继承IRequestHandler，实现接口中的各种方法
public class RequestHandler : IRequestHandler
{
/// <inheritdoc/>
bool IRequestHandler.OnBeforeBrowse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool userGesture, bool isRedirect) { return OnBeforeBrowse(chromiumWebBrowser, browser, frame, request, userGesture, isRedirect); } /// <summary> /// Called before browser navigation. If the navigation is allowed <see cref="IWebBrowser.FrameLoadStart"/> and /// <see cref="IWebBrowser.FrameLoadEnd"/> /// will be called. If the navigation is canceled <see cref="IWebBrowser.LoadError"/> will be called with an ErrorCode value of /// <see cref="CefErrorCode.Aborted"/>. /// </summary> /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="frame">The frame the request is coming from.</param> /// <param name="request">the request object - cannot be modified in this callback.</param> /// <param name="userGesture">The value will be true if the browser navigated via explicit user gesture (e.g. clicking a link) or /// false if it navigated automatically (e.g. via the DomContentLoaded event).</param> /// <param name="isRedirect">has the request been redirected.</param> /// <returns> /// Return true to cancel the navigation or false to allow the navigation to proceed. /// </returns> protected virtual bool OnBeforeBrowse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool userGesture, bool isRedirect) { return false; } /// <inheritdoc/> bool IRequestHandler.OnOpenUrlFromTab(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, string targetUrl, WindowOpenDisposition targetDisposition, bool userGesture) { return OnOpenUrlFromTab(chromiumWebBrowser, browser, frame, targetUrl, targetDisposition, userGesture); } /// <summary> /// Called on the UI thread before OnBeforeBrowse in certain limited cases where navigating a new or different browser might be /// desirable. This includes user-initiated navigation that might open in a special way (e.g. links clicked via middle-click or /// ctrl + left-click) and certain types of cross-origin navigation initiated from the renderer process (e.g. navigating the top- /// level frame to/from a file URL). /// </summary> /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="frame">The frame object.</param> /// <param name="targetUrl">target url.</param> /// <param name="targetDisposition">The value indicates where the user intended to navigate the browser based on standard /// Chromium behaviors (e.g. current tab, new tab, etc).</param> /// <param name="userGesture">The value will be true if the browser navigated via explicit user gesture (e.g. clicking a link) or /// false if it navigated automatically (e.g. via the DomContentLoaded event).</param> /// <returns> /// Return true to cancel the navigation or false to allow the navigation to proceed in the source browser's top-level frame. /// </returns> protected virtual bool OnOpenUrlFromTab(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, string targetUrl, WindowOpenDisposition targetDisposition, bool userGesture) { return false; } /// <inheritdoc/> IResourceRequestHandler IRequestHandler.GetResourceRequestHandler(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool isNavigation, bool isDownload, string requestInitiator, ref bool disableDefaultHandling) { return GetResourceRequestHandler(chromiumWebBrowser, browser, frame, request, isNavigation, isDownload, requestInitiator, ref disableDefaultHandling); } /// <summary> /// Called on the CEF IO thread before a resource request is initiated. /// </summary> /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control.</param> /// <param name="browser">represent the source browser of the request.</param> /// <param name="frame">represent the source frame of the request.</param> /// <param name="request">represents the request contents and cannot be modified in this callback.</param> /// <param name="isNavigation">will be true if the resource request is a navigation.</param> /// <param name="isDownload">will be true if the resource request is a download.</param> /// <param name="requestInitiator">is the origin (scheme + domain) of the page that initiated the request.</param> /// <param name="disableDefaultHandling">[in,out] to true to disable default handling of the request, in which case it will need /// to be handled via <see cref="IResourceRequestHandler.GetResourceHandler"/> or it will be canceled.</param> /// <returns> /// To allow the resource load to proceed with default handling return null. To specify a handler for the resource return a /// <see cref="IResourceRequestHandler"/> object. If this callback returns null the same method will be called on the associated /// <see cref="IRequestContextHandler"/>, if any. /// </returns> protected virtual IResourceRequestHandler GetResourceRequestHandler(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool isNavigation, bool isDownload, string requestInitiator, ref bool disableDefaultHandling) { return null; } /// <inheritdoc/> bool IRequestHandler.GetAuthCredentials(IWebBrowser chromiumWebBrowser, IBrowser browser, string originUrl, bool isProxy, string host, int port, string realm, string scheme, IAuthCallback callback) { return GetAuthCredentials(chromiumWebBrowser, browser, originUrl, isProxy, host, port, realm, scheme, callback); } /// <summary> /// Called when the browser needs credentials from the user. /// </summary> /// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="originUrl">is the origin making this authentication request.</param> /// <param name="isProxy">indicates whether the host is a proxy server.</param> /// <param name="host">hostname.</param> /// <param name="port">port number.</param> /// <param name="realm">realm.</param> /// <param name="scheme">scheme.</param> /// <param name="callback">Callback interface used for asynchronous continuation of authentication requests.</param> /// <returns> /// Return true to continue the request and call <see cref="IAuthCallback.Continue(string, string)"/> when the authentication /// information is available. Return false to cancel the request. /// </returns> protected virtual bool GetAuthCredentials(IWebBrowser chromiumWebBrowser, IBrowser browser, string originUrl, bool isProxy, string host, int port, string realm, string scheme, IAuthCallback callback) { callback.Dispose(); return false; } /// <inheritdoc/> bool IRequestHandler.OnQuotaRequest(IWebBrowser chromiumWebBrowser, IBrowser browser, string originUrl, long newSize, IRequestCallback callback) { return OnQuotaRequest(chromiumWebBrowser, browser, originUrl, newSize, callback); } /// <summary> /// Called when JavaScript requests a specific storage quota size via the webkitStorageInfo.requestQuota function. For async /// processing return true and execute <see cref="IRequestCallback.Continue"/> at a later time to grant or deny the request or /// <see cref="IRequestCallback.Cancel"/> to cancel. /// </summary> /// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="originUrl">the origin of the page making the request.</param> /// <param name="newSize">is the requested quota size in bytes.</param> /// <param name="callback">Callback interface used for asynchronous continuation of url requests.</param> /// <returns> /// Return false to cancel the request immediately. Return true to continue the request and call /// <see cref="IRequestCallback.Continue"/> either in this method or at a later time to grant or deny the request. /// </returns> protected virtual bool OnQuotaRequest(IWebBrowser chromiumWebBrowser, IBrowser browser, string originUrl, long newSize, IRequestCallback callback) { callback.Dispose(); return false; } /// <inheritdoc/> bool IRequestHandler.OnCertificateError(IWebBrowser chromiumWebBrowser, IBrowser browser, CefErrorCode errorCode, string requestUrl, ISslInfo sslInfo, IRequestCallback callback) { return OnCertificateError(chromiumWebBrowser, browser, errorCode, requestUrl, sslInfo, callback); } /// <summary> /// Called to handle requests for URLs with an invalid SSL certificate. Return true and call /// <see cref="IRequestCallback.Continue"/> either in this method or at a later time to continue or cancel the request. /// If CefSettings.IgnoreCertificateErrors is set all invalid certificates will be accepted without calling this method. /// </summary> /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="errorCode">the error code for this invalid certificate.</param> /// <param name="requestUrl">the url of the request for the invalid certificate.</param> /// <param name="sslInfo">ssl certificate information.</param> /// <param name="callback">Callback interface used for asynchronous continuation of url requests. If empty the error cannot be /// recovered from and the request will be canceled automatically.</param> /// <returns> /// Return false to cancel the request immediately. Return true and use <see cref="IRequestCallback"/> to execute in an async /// fashion. /// </returns> protected virtual bool OnCertificateError(IWebBrowser chromiumWebBrowser, IBrowser browser, CefErrorCode errorCode, string requestUrl, ISslInfo sslInfo, IRequestCallback callback) { callback.Dispose(); return false; } /// <inheritdoc/> bool IRequestHandler.OnSelectClientCertificate(IWebBrowser chromiumWebBrowser, IBrowser browser, bool isProxy, string host, int port, X509Certificate2Collection certificates, ISelectClientCertificateCallback callback) { return OnSelectClientCertificate(chromiumWebBrowser, browser, isProxy, host, port, certificates, callback); } /// <summary> /// Called when the browser needs user to select Client Certificate for authentication requests (eg. PKI authentication). /// </summary> /// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="isProxy">indicates whether the host is a proxy server.</param> /// <param name="host">hostname.</param> /// <param name="port">port number.</param> /// <param name="certificates">List of Client certificates for selection.</param> /// <param name="callback">Callback interface used for asynchronous continuation of client certificate selection for /// authentication requests.</param> /// <returns> /// Return true to continue the request and call ISelectClientCertificateCallback.Select() with the selected certificate for /// authentication. Return false to use the default behavior where the browser selects the first certificate from the list. /// /// </returns> protected virtual bool OnSelectClientCertificate(IWebBrowser chromiumWebBrowser, IBrowser browser, bool isProxy, string host, int port, X509Certificate2Collection certificates, ISelectClientCertificateCallback callback) { callback.Dispose(); return false; } /// <inheritdoc/> void IRequestHandler.OnPluginCrashed(IWebBrowser chromiumWebBrowser, IBrowser browser, string pluginPath) { OnPluginCrashed(chromiumWebBrowser, browser, pluginPath); } /// <summary> /// Called when a plugin has crashed. /// </summary> /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="pluginPath">path of the plugin that crashed.</param> protected virtual void OnPluginCrashed(IWebBrowser chromiumWebBrowser, IBrowser browser, string pluginPath) { } /// <inheritdoc/> void IRequestHandler.OnRenderViewReady(IWebBrowser chromiumWebBrowser, IBrowser browser) { OnRenderViewReady(chromiumWebBrowser, browser); } /// <summary> /// Called on the CEF UI thread when the render view associated with browser is ready to receive/handle IPC messages in the /// render process. /// </summary> /// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> protected virtual void OnRenderViewReady(IWebBrowser chromiumWebBrowser, IBrowser browser) { } /// <inheritdoc/> void IRequestHandler.OnRenderProcessTerminated(IWebBrowser chromiumWebBrowser, IBrowser browser, CefTerminationStatus status) { OnRenderProcessTerminated(chromiumWebBrowser, browser, status); } /// <summary> /// Called when the render process terminates unexpectedly. /// </summary> /// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param> /// <param name="browser">the browser object.</param> /// <param name="status">indicates how the process terminated.</param> protected virtual void OnRenderProcessTerminated(IWebBrowser chromiumWebBrowser, IBrowser browser, CefTerminationStatus status) { } /// <inheritdoc/> void IRequestHandler.OnDocumentAvailableInMainFrame(IWebBrowser chromiumWebBrowser, IBrowser browser) { OnDocumentAvailableInMainFrame(chromiumWebBrowser, browser); } /// <summary> /// Called on the CEF UI thread when the window.document object of the main frame has been created. /// </summary> /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control</param> /// <param name="browser">the browser object</param> protected virtual void OnDocumentAvailableInMainFrame(IWebBrowser chromiumWebBrowser, IBrowser browser) { } }
2、新建WinFormsRequestHandler类，再继承RequestHandler类，在WinFormsRequestHandler类中来写具体的获取request参数方法
比如，要获取百度登录的post参数
先F12查看此方法名称为login
WinFormsRequestHandler类中重写覆盖父类中的方法GetResourceRequestHandler，并且只拦截请求url中有login名称的请求
public class WinFormsRequestHandler : RequestHandler
{
protected override IResourceRequestHandler GetResourceRequestHandler(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool isNavigation, bool isDownload, string requestInitiator, ref bool disableDefaultHandling) { //NOTE: In most cases you examine the request.Url and only handle requests you are interested in if (request.Url.ToLower().Contains("login".ToLower())) { using (var postData = request.PostData) { if (postData != null) { var elements = postData.Elements; var charSet = request.GetCharSet(); foreach (var element in elements) { if (element.Type == PostDataElementType.Bytes) { var body = element.GetBody(charSet); } } } } } return null; } }
3、要在初始化cefsharp的地方，指向request请求的具体实现
public static string url = "https://www.baidu.com";//设置进入网页
public ChromiumWebBrowser browser = new ChromiumWebBrowser(url);//初始化cefsharp浏览器
public Form1()
{
InitializeComponent();
browser.Dock = DockStyle.Fill;//设置填充满窗体
this.Controls.Add(browser);//把cefsharp加入到窗体中
browser.RequestHandler = new WinFormsRequestHandler();//request请求的具体实现
}
4、调试运行，在步骤2的body中就可以获取到request的参数。再用&分割就可以得到各个参数
