WinForm窗体程序中使用CefSharp获取加载后的资源、截取request参数、拦截response数据、注入jquery文件和js代码（3）-拦截response数据
源码地址：源代码csdn 或者底部qq问我要
五、cefsharp拦截response数据
与四类似，response数据也是要继承接口 IResourceRequestHandler，实现其方法，从方法中获取
1、添加类ResourceRequestHandler，继承IResourceRequestHandler，实现各种方法
public class ResourceRequestHandler : IResourceRequestHandler
{
/// <summary>
/// Called on the CEF IO thread before a resource request is loaded. To optionally filter cookies for the request return a
/// <see cref="ICookieAccessFilter"/> object.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - can be modified in this callback.</param>
/// <returns>To optionally filter cookies for the request return a ICookieAccessFilter instance otherwise return null.</returns>
ICookieAccessFilter IResourceRequestHandler.GetCookieAccessFilter(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request)
{
return GetCookieAccessFilter(chromiumWebBrowser, browser, frame, request);
}
/// <summary>
/// Called on the CEF IO thread before a resource request is loaded. To optionally filter cookies for the request return a
/// <see cref="ICookieAccessFilter"/> object.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - can be modified in this callback.</param>
/// <returns>To optionally filter cookies for the request return a ICookieAccessFilter instance otherwise return null.</returns>
protected virtual ICookieAccessFilter GetCookieAccessFilter(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request)
{
return null;
}
/// <summary>
/// Called on the CEF IO thread before a resource is loaded. To specify a handler for the resource return a
/// <see cref="IResourceHandler"/> object.
/// </summary>
/// <param name="chromiumWebBrowser">The browser UI control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <returns>
/// To allow the resource to load using the default network loader return null otherwise return an instance of
/// <see cref="IResourceHandler"/> with a valid stream.
/// </returns>
IResourceHandler IResourceRequestHandler.GetResourceHandler(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request)
{
return GetResourceHandler(chromiumWebBrowser, browser, frame, request);
}
/// <summary>
/// Called on the CEF IO thread before a resource is loaded. To specify a handler for the resource return a
/// <see cref="IResourceHandler"/> object.
/// </summary>
/// <param name="chromiumWebBrowser">The browser UI control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <returns>
/// To allow the resource to load using the default network loader return null otherwise return an instance of
/// <see cref="IResourceHandler"/> with a valid stream.
/// </returns>
protected virtual IResourceHandler GetResourceHandler(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request)
{
return null;
}
/// <summary>Called on the CEF IO thread to optionally filter resource response content.</summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <returns>Return an IResponseFilter to intercept this response, otherwise return null.</returns>
IResponseFilter IResourceRequestHandler.GetResourceResponseFilter(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
{
return GetResourceResponseFilter(chromiumWebBrowser, browser, frame, request, response);
}
/// <summary>Called on the CEF IO thread to optionally filter resource response content.</summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <returns>Return an IResponseFilter to intercept this response, otherwise return null.</returns>
protected virtual IResponseFilter GetResourceResponseFilter(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
{
return null;
}
/// <summary>
/// Called on the CEF IO thread before a resource request is loaded. To redirect or change the resource load optionally modify
/// <paramref name="request"/>. Modification of the request URL will be treated as a redirect.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - can be modified in this callback.</param>
/// <param name="callback">Callback interface used for asynchronous continuation of url requests.</param>
/// <returns>
/// Return <see cref="CefReturnValue.Continue"/> to continue the request immediately. Return
/// <see cref="CefReturnValue.ContinueAsync"/> and call <see cref="IRequestCallback.Continue"/> or
/// <see cref="IRequestCallback.Cancel"/> at a later time to continue or the cancel the request asynchronously. Return
/// <see cref="CefReturnValue.Cancel"/> to cancel the request immediately.
/// </returns>
CefReturnValue IResourceRequestHandler.OnBeforeResourceLoad(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IRequestCallback callback)
{
return OnBeforeResourceLoad(chromiumWebBrowser, browser, frame, request, callback);
}
/// <summary>
/// Called on the CEF IO thread before a resource request is loaded. To redirect or change the resource load optionally modify
/// <paramref name="request"/>. Modification of the request URL will be treated as a redirect.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - can be modified in this callback.</param>
/// <param name="callback">Callback interface used for asynchronous continuation of url requests.</param>
/// <returns>
/// Return <see cref="CefReturnValue.Continue"/> to continue the request immediately. Return
/// <see cref="CefReturnValue.ContinueAsync"/> and call <see cref="IRequestCallback.Continue"/> or
/// <see cref="IRequestCallback.Cancel"/> at a later time to continue or the cancel the request asynchronously. Return
/// <see cref="CefReturnValue.Cancel"/> to cancel the request immediately.
/// </returns>
protected virtual CefReturnValue OnBeforeResourceLoad(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IRequestCallback callback)
{
return CefReturnValue.Continue;
}
/// <summary>
/// Called on the CEF UI thread to handle requests for URLs with an unknown protocol component. SECURITY WARNING: YOU SHOULD USE
/// THIS METHOD TO ENFORCE RESTRICTIONS BASED ON SCHEME, HOST OR OTHER URL ANALYSIS BEFORE ALLOWING OS EXECUTION.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <returns>
/// return to true to attempt execution via the registered OS protocol handler, if any. Otherwise return false.
/// </returns>
bool IResourceRequestHandler.OnProtocolExecution(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request)
{
return OnProtocolExecution(chromiumWebBrowser, browser, frame, request);
}
/// <summary>
/// Called on the CEF UI thread to handle requests for URLs with an unknown protocol component. SECURITY WARNING: YOU SHOULD USE
/// THIS METHOD TO ENFORCE RESTRICTIONS BASED ON SCHEME, HOST OR OTHER URL ANALYSIS BEFORE ALLOWING OS EXECUTION.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <returns>
/// return to true to attempt execution via the registered OS protocol handler, if any. Otherwise return false.
/// </returns>
protected virtual bool OnProtocolExecution(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request)
{
return false;
}
/// <summary>
/// Called on the CEF IO thread when a resource load has completed. This method will be called for all requests, including
/// requests that are aborted due to CEF shutdown or destruction of the associated browser. In cases where the associated browser
/// is destroyed this callback may arrive after the <see cref="ILifeSpanHandler.OnBeforeClose"/> callback for that browser. The
/// <see cref="IFrame.IsValid"/> method can be used to test for this situation, and care
/// should be taken not to call <paramref name="browser"/> or <paramref name="frame"/> methods that modify state (like LoadURL,
/// SendProcessMessage, etc.) if the frame is invalid.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <param name="status">indicates the load completion status.</param>
/// <param name="receivedContentLength">is the number of response bytes actually read.</param>
void IResourceRequestHandler.OnResourceLoadComplete(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, UrlRequestStatus status, long receivedContentLength)
{
OnResourceLoadComplete(chromiumWebBrowser, browser, frame, request, response, status, receivedContentLength);
}
/// <summary>
/// Called on the CEF IO thread when a resource load has completed. This method will be called for all requests, including
/// requests that are aborted due to CEF shutdown or destruction of the associated browser. In cases where the associated browser
/// is destroyed this callback may arrive after the <see cref="ILifeSpanHandler.OnBeforeClose"/> callback for that browser. The
/// <see cref="IFrame.IsValid"/> method can be used to test for this situation, and care
/// should be taken not to call <paramref name="browser"/> or <paramref name="frame"/> methods that modify state (like LoadURL,
/// SendProcessMessage, etc.) if the frame is invalid.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <param name="status">indicates the load completion status.</param>
/// <param name="receivedContentLength">is the number of response bytes actually read.</param>
protected virtual void OnResourceLoadComplete(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, UrlRequestStatus status, long receivedContentLength)
{
}
/// <summary>
/// Called on the CEF IO thread when a resource load is redirected. The <paramref name="request"/> parameter will contain the old
/// URL and other request-related information. The <paramref name="response"/> parameter will contain the response that resulted
/// in the redirect. The <paramref name="newUrl"/> parameter will contain the new URL and can be changed if desired.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <param name="newUrl">[in,out] the new URL and can be changed if desired.</param>
void IResourceRequestHandler.OnResourceRedirect(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, ref string newUrl)
{
OnResourceRedirect(chromiumWebBrowser, browser, frame, request, response, ref newUrl);
}
/// <summary>
/// Called on the CEF IO thread when a resource load is redirected. The <paramref name="request"/> parameter will contain the old
/// URL and other request-related information. The <paramref name="response"/> parameter will contain the response that resulted
/// in the redirect. The <paramref name="newUrl"/> parameter will contain the new URL and can be changed if desired.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object - cannot be modified in this callback.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <param name="newUrl">[in,out] the new URL and can be changed if desired.</param>
protected virtual void OnResourceRedirect(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, ref string newUrl)
{
}
/// <summary>
/// Called on the CEF IO thread when a resource response is received. To allow the resource load to proceed without modification
/// return false. To redirect or retry the resource load optionally modify <paramref name="request"/> and return true.
/// Modification of the request URL will be treated as a redirect. Requests handled using the default network loader cannot be
/// redirected in this callback.
///
/// WARNING: Redirecting using this method is deprecated. Use OnBeforeResourceLoad or GetResourceHandler to perform redirects.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <returns>
/// To allow the resource load to proceed without modification return false. To redirect or retry the resource load optionally
/// modify <paramref name="request"/> and return true. Modification of the request URL will be treated as a redirect. Requests
/// handled using the default network loader cannot be redirected in this callback.
/// </returns>
bool IResourceRequestHandler.OnResourceResponse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
{
return OnResourceResponse(chromiumWebBrowser, browser, frame, request, response);
}
/// <summary>
/// Called on the CEF IO thread when a resource response is received. To allow the resource load to proceed without modification
/// return false. To redirect or retry the resource load optionally modify <paramref name="request"/> and return true.
/// Modification of the request URL will be treated as a redirect. Requests handled using the default network loader cannot be
/// redirected in this callback.
///
/// WARNING: Redirecting using this method is deprecated. Use OnBeforeResourceLoad or GetResourceHandler to perform redirects.
/// </summary>
/// <param name="chromiumWebBrowser">The ChromiumWebBrowser control.</param>
/// <param name="browser">the browser object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="frame">the frame object - may be null if originating from ServiceWorker or CefURLRequest.</param>
/// <param name="request">the request object.</param>
/// <param name="response">the response object - cannot be modified in this callback.</param>
/// <returns>
/// To allow the resource load to proceed without modification return false. To redirect or retry the resource load optionally
/// modify <paramref name="request"/> and return true. Modification of the request URL will be treated as a redirect. Requests
/// handled using the default network loader cannot be redirected in this callback.
/// </returns>
protected virtual bool OnResourceResponse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
{
return false;
}
/// <summary>
/// Called when the unamanged resource is freed.
/// Unmanaged resources are ref counted and freed when
/// the last reference is released, this works differently
/// to .Net garbage collection.
/// </summary>
protected virtual void Dispose()
{
}
void IDisposable.Dispose()
{
Dispose();
}
}
2、要从Resource Filter中获取数据，先添加两个类FilterManager、TestJsonFilter，合并在一个文件FilterManager中，用来获取数据
public class TestJsonFilter : IResponseFilter
{
public List<byte> DataAll = new List<byte>();
public FilterStatus Filter(System.IO.Stream dataIn, out long dataInRead, System.IO.Stream dataOut, out long dataOutWritten)
{
try
{
if (dataIn == null || dataIn.Length == 0)
{
dataInRead = 0;
dataOutWritten = 0;
return FilterStatus.Done;
}
dataInRead = dataIn.Length;
dataOutWritten = Math.Min(dataInRead, dataOut.Length);
dataIn.CopyTo(dataOut);
dataIn.Seek(0, SeekOrigin.Begin);
byte[] bs = new byte[dataIn.Length];
dataIn.Read(bs, 0, bs.Length);
DataAll.AddRange(bs);
dataInRead = dataIn.Length;
dataOutWritten = dataIn.Length;
return FilterStatus.NeedMoreData;
}
catch (Exception ex)
{
dataInRead = dataIn.Length;
dataOutWritten = dataIn.Length;
return FilterStatus.Done;
}
}
public bool InitFilter()
{
return true;
}
public void Dispose()
{
}
}
public class FilterManager
{
private static Dictionary<string, IResponseFilter> dataList = new Dictionary<string, IResponseFilter>();
public static IResponseFilter CreateFilter(string guid)
{
lock (dataList)
{
var filter = new TestJsonFilter();
dataList.Add(guid, filter);
return filter;
}
}
public static IResponseFilter GetFileter(string guid)
{
lock (dataList)
{
return dataList[guid];
}
}
}
3、新建类WinFormResourceRequestHandler，继承ResourceRequestHandler类，重写覆盖父类方法GetResourceResponseFilter、OnResourceLoadComplete
public class WinFormResourceRequestHandler : ResourceRequestHandler { protected override IResponseFilter GetResourceResponseFilter(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response) { var filter = FilterManager.CreateFilter(request.Identifier.ToString()); return filter; } protected override void OnResourceLoadComplete(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, UrlRequestStatus status, long receivedContentLength) { if (request.Url.ToLower().Contains("login".ToLower())) { var filter = FilterManager.GetFileter(request.Identifier.ToString()) as TestJsonFilter; ASCIIEncoding encoding = new ASCIIEncoding(); //这里截获返回的数据 var data = encoding.GetString(filter.DataAll.ToArray()); } } }
此处也只拦截login登录返回的数据。也可以匹配别的页面请求
4、要修改IRequestHandler的实现类WinFormsRequestHandler中GetResourceRequestHandler方法，return null，改为return WinFormResourceRequestHandler，来调用请求后资源加载前的处理方法。
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 new WinFormResourceRequestHandler(); } }
5、此时就可以调试运行，拦截获取到login请求后的的数据
