cefsharp如何截获xhr请求以获取响应正文值?

问题描述

CefSharp是否能够拦截XHRHttpRequest并获取响应正文值?如果是，我想知道它是如何完成的.

Is CefSharp able to intercept XHRHttpRequest and obtain the response body value? if yes, I would like to know how it is done.

推荐答案

为此我创建了以下类，并从 IRequestHandler.GetResourceResponseFilter 返回它的实例:

I created the following class for this and return instance of it from IRequestHandler.GetResourceResponseFilter:

internal class ResponseSniffer : IResponseFilter
{
    private readonly Action<Stream> _streamHandler;

    public ResponseSniffer(Action<Stream> streamHandler)
    {
        _streamHandler = streamHandler;
    }

    public void Dispose()
    {
    }

    public bool InitFilter()
    {
        return true;
    }

    public FilterStatus Filter(Stream dataIn, out long dataInRead, Stream dataOut, out long dataOutWritten)
    {
        if (dataIn == null)
        {
            dataInRead = 0;
            dataOutWritten = 0;
            return FilterStatus.Error;
        }
        dataIn.CopyTo(dataOut);
        dataInRead = dataIn.Length;
        dataOutWritten = dataInRead;

        dataIn.Position = 0;
        _streamHandler(dataIn);
        return FilterStatus.Done;
    }
}

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