.net 访问内网接口

	/// 

    /// HTTP Post请求
    /// 
    /// HTTP接口Url，不带协议和端口，如/artemis/api/resource/v1/org/advance/orgList
    /// 请求参数
    /// 请求超时时间，单位：秒
    /// 请求结果
    public static byte[] HttpPost(bool _isHttps, string _ip, string _port, string uri, string body, int timeout)
    {


        Dictionary header = new Dictionary();

        // 初始化请求：组装请求头，设置远程证书自动验证通过
        //initRequest(header, uri, body, true);

        // build web request object
        StringBuilder sb = new StringBuilder();
        sb.Append(_isHttps ? "https://" : "http://").Append(_ip).Append(":").Append(_port.ToString()).Append(uri);

        // 创建POST请求
        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(sb.ToString());
        req.KeepAlive = false;
        req.ProtocolVersion = HttpVersion.Version11;
        req.AllowAutoRedirect = false;   // 不允许自动重定向
        req.Method = "POST";
        req.Timeout = timeout * 1000;    // 传入是秒，需要转换成毫秒
        req.ContentType = "application/json";
        //req.Accept = header["Accept"];
        //req.ContentType = header["Content-Type"];

        //foreach (string headerKey in header.Keys)
        //{
        //    if (headerKey.Contains("x-ca-"))
        //    {
        //        req.Headers.Add(headerKey + ":" + header[headerKey]);
        //    }
        //}

        if (!string.IsNullOrWhiteSpace(body))
        {
            byte[] postBytes = Encoding.UTF8.GetBytes(body);
            req.ContentLength = postBytes.Length;
            Stream reqStream = null;

            try
            {
                reqStream = req.GetRequestStream();
                reqStream.Write(postBytes, 0, postBytes.Length);
                reqStream.Close();
            }
            catch (WebException e)
            {
                if (reqStream != null)
                {
                    reqStream.Close();
                }

                return null;
            }
        }

        HttpWebResponse rsp = null;
        try
        {
            rsp = (HttpWebResponse)req.GetResponse();
            if (HttpStatusCode.OK == rsp.StatusCode)
            {
                Stream rspStream = rsp.GetResponseStream();
                StreamReader sr = new StreamReader(rspStream);
                string strStream = sr.ReadToEnd();
                long streamLength = strStream.Length;
                byte[] response = System.Text.Encoding.UTF8.GetBytes(strStream);
                rsp.Close(); 
                return response;
            }
            else if (HttpStatusCode.Found == rsp.StatusCode || HttpStatusCode.Moved == rsp.StatusCode)  // 302/301 redirect
            {
                try
                {
                    string reqUrl = rsp.Headers["Location"].ToString();    // 如需要重定向URL，请自行修改接口返回此参数
                    rsp.Close();
                    WebRequest wreq = WebRequest.Create(reqUrl);
                    rsp = (HttpWebResponse)wreq.GetResponse();
                    Stream rspStream = rsp.GetResponseStream();
                    long streamLength = rsp.ContentLength;
                    int offset = 0;
                    byte[] response = new byte[streamLength];
                    while (streamLength > 0)
                    {
                        int n = rspStream.Read(response, offset, (int)streamLength);
                        if (0 == n)
                        {
                            break;
                        }

                        offset += n;
                        streamLength -= n;
                    }

                    return response;
                }
                catch (Exception e)
                {
                    rsp.Close();
                    return null;
                }
            }

            rsp.Close();
        }
        catch (WebException e)
        {
            if (rsp != null)
            {
                rsp.Close();
            }
        }

        return null;
    }

//接口需要的参数–SessionID,loginID,eSystemCode

	public string GetModelCurTime(string sessionID,string loginID,string eSystemCode)
    {

        string result = "";
        TData tj = new TData();
        ApiModel reques = new ApiModel();
        reques.sessionID = sessionID;
        reques.loginID = loginID;
        reques.eSystemCode = eSystemCode;

   
        string uri = "/checkMenuRight";//访问的接口名称
        byte[]  response = HttpPost(false, "内网ip地址", "端口号", uri, JsonConvert.SerializeObject(reques), 30);


        if (null == response)
        {
            //console.writeline(uri + " : post fail");

        }
        else
        {

            string responseStr = System.Text.Encoding.UTF8.GetString(response);
            //hkresponsepage hkresponsepage = jsonconvert.deserializeobject>(responsestr);
            JObject jo = (JObject)JsonConvert.DeserializeObject(responseStr);
            //var date = jsonconvert.deserializeobject(jsonconvert.serializeobject(jo["retcontent"]));
            //    ["$userid"].tostring();
            // tj.data = response;
            result = jo["body"]["retContent"]["username"].ToString();
            //dt = gettimespan(convert.toint64(date));
            //result = responsestr;

        }

        return result;
    }