Http请求中Referer的设置,CEFSharp带Referer请求-YES开发框架网

在抓包阿里1688接口的时候，某些接口需要用到 referer 参数，如果不设置该参数，返回值将是空

如图所示：

如果不传 referer 参数，返回结果会不同,返回是空

C# HTTP 请求使用referer

/// <summary>
/// 客户端统一提交数据
/// </summary>
/// <param name="url">WebAPI核心URL地址</param>
/// <param name="data">提交的数据</param>
/// <param name="contentType">指定request.ContentType</param>
/// <returns>返回数据</returns>
public static GZResponseDataModel Post(string url, string data, string contentType, System.Collections.Specialized.NameValueCollection header, Action<HttpWebRequest> requestHandle)
{
    System.Net.HttpWebRequest request = GetRequest(url, header);
    
    request.Method = "POST";
    request.ContentType = contentType;// "application/json;charset=UTF-8";//POST必须使用JSON格式
    if (!String.IsNullOrEmpty(data))
    {
        string paraUrlCoded = data;
        byte[] payload;
        payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
        request.ContentLength = payload.Length;
        Stream writer = request.GetRequestStream();
        writer.Write(payload, 0, payload.Length);
        writer.Close();
    }

    requestHandle?.Invoke(request);

    return GetResponse(request);
}

GarsonZhang www.yesdotnet.com

requesthandle 回调可以设置 request 请求信息, 例如：

string str = GZ.CefSharpLibrary.APIRequest.RequestByHttp.Post(urlEx, postData, "application/x-www-form-urlencoded", request =>
{
    request.Referer = "https://widget.1688.com/front/ajax/bridge.html?target=brg-0-6561";
    request.Headers.Add("cookie", cookie);
});

GarsonZhang www.yesdotnet.com

这样的设置发现返回结果是空，似乎 referer设置无效

解决方案：

经过测试研究，发现对Referer设置要放在所有设置之前，这样才有效

改变 requestHandle 代码的位置

/// <summary>
/// 客户端统一提交数据
/// </summary>
/// <param name="url">WebAPI核心URL地址</param>
/// <param name="data">提交的数据</param>
/// <param name="contentType">指定request.ContentType</param>
/// <returns>返回数据</returns>
public static GZResponseDataModel Post(string url, string data, string contentType, System.Collections.Specialized.NameValueCollection header, Action<HttpWebRequest> requestHandle)
{
    System.Net.HttpWebRequest request = GetRequest(url, header);

    requestHandle?.Invoke(request); // 放在这个位置才有效
     
    request.Method = "POST";
    request.ContentType = contentType;// "application/json;charset=UTF-8";//POST必须使用JSON格式
    if (!String.IsNullOrEmpty(data))
    {
        string paraUrlCoded = data;
        byte[] payload;
        payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
        request.ContentLength = payload.Length;
        Stream writer = request.GetRequestStream();
        writer.Write(payload, 0, payload.Length);
        writer.Close();
    }

    //requestHandle?.Invoke(request); // 原来在这个位置，设置无效

    return GetResponse(request);
}

GarsonZhang www.yesdotnet.com

CEFSharp 中post请求IRequest设置Referer

CEFSharp中设置Referer的方法为：request.SetReferrer()

经过测试，如果使用

request.SetReferrer("***", CefSharp.ReferrerPolicy.Default);

request的ReferrerUrl并没有改变

经过测试使用如下几种方式设置均有效

request.SetReferrer("***", CefSharp.ReferrerPolicy.NeverClearReferrer);
request.SetReferrer("***", CefSharp.ReferrerPolicy.Origin);