开发笔记: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代码拦截response数据

public class ResourceRequestHandler : IResourceRequestHandler
{
///

public class TestJsonFilter : IResponseFilter
{
public List DataAll = new List();
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 dataList = new Dictionary();
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];
}
}
}

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());
}
}
}

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();
}
}