Wechat applet cash red packet returns the error "the IP address is not the available IP address you set on the merchant platform". The ultimate solution

Baidu searched , There is no fundamental solution （ The premise is that the allowed... Has been set on the merchant platform IP）, It's a hint IP The address is not yours ... Error prompt for ,PS： Despise Tencent , Since you all know me IP What is it? , Why don't you directly tell me the truth when you return the information IP Address .

There are similar solutions ：

But actually this IP It's not my truth IP, Because of virtual routing or proxy and other means , Can't get the truth IP Address, etc .

Then how can we get those that really meet the requirements of wechat IP Well , Look at the code below ：

    public string getTrueIP()
    {
        String direction = "";
        string url = "http://checkip.dyndns.org/";
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
        request.Method = "PROPFIND";
        request.ContentType = "application/x-www-form-urlencoded;charset:utf-8";
        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
            Stream stream = response.GetResponseStream();
            using (StreamReader streamReader = new StreamReader(stream, Encoding.UTF8))
            {
                direction = streamReader.ReadToEnd().ToString();
            }
        }
        //Search for the ip in the html
        int first = direction.IndexOf("Address: ") + 9;
        int last = direction.LastIndexOf("</body>");
        direction = direction.Substring(first, last - first);
        return direction;
    }

Execute this code on the server , Request a third-party tool to obtain the real of this server IP, Put this IP Add it to the merchant platform , solve .