CefSharp 修改请求头Referer

添加ChromiumWebBrowser的RequestHandler处理类:

ResourceRequestHandler： 请求前处理类

class CustomResourceRequestHandler : CefSharp.Handler.ResourceRequestHandler
{
        protected override CefReturnValue OnBeforeResourceLoad(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IRequestCallback callback)
        {
            //设置Referrer
            request.SetReferrer("http://xxx.xx/", ReferrerPolicy.Default);
            //可以根据不同Url请求，设置不同referer request.Url.StartsWith()
            if(request.Url.StartsWith("http://xxx.xx/")){
                request.SetReferrer("http://xxx.xx/", ReferrerPolicy.Default);
            }
        }
}

官方已指明不能在request.Headers里边直接处理：

RequestHandler： 请求处理类

    class CustomRequestHandler : CefSharp.Handler.RequestHandler
    {
        protected override IResourceRequestHandler GetResourceRequestHandler(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool isNavigation, bool isDownload, string requestInitiator, ref bool disableDefaultHandling)
        {
            return new CustomResourceRequestHandler();
        }
    }

添加RequestHandler处理:

chromiumWebBrowser1.RequestHandler = new CustomRequestHandler();