[网络协议]C#后台调用Http外网接口（GET POST）

? 1.get方法调用接口获取json文件内容? ??

public?void?GetFunction()
????????{
????????????string?serviceAddress?=?"http://222.111.999.444:8687/tttr/usercrd/12/b7e50cb45a?userid=9999";
????????????HttpWebRequest?request?=?(HttpWebRequest)WebRequest.Create(serviceAddress);
????????????request.Method?=?"GET";
????????????request.ContentType?=?"text/html;charset=UTF-8";
????????????HttpWebResponse?response?=?(HttpWebResponse)request.GetResponse();
????????????Stream?myResponseStream?=?response.GetResponseStream();
????????????StreamReader?myStreamReader?=?new?StreamReader(myResponseStream,?Encoding.UTF8);
????????????string?retString?=?myStreamReader.ReadToEnd();
????????????myStreamReader.Close();
????????????myResponseStream.Close();
????????????Response.Write(retString);
????????}

? ? ??? 2.post方法调用接口获取json文件内容

 public void PostFunction()
        {

            string serviceAddress = "http://222.111.999.444:8687/tttr/usercrd/uuu/12/dfd7e4";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceAddress);

            request.Method = "POST";
            request.ContentType = "application/json";
            string strContent = @"{ ""mmmm"": ""89e"",""nnnnnn"": ""0101943"",""kkkkkkk"": ""e8sodijf9""}";
            using (StreamWriter dataStream = new StreamWriter(request.GetRequestStream()))
            {
                dataStream.Write(strContent);
                dataStream.Close();
            }
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            string encoding = response.ContentEncoding;
            if (encoding == null || encoding.Length < 1)
            {
                encoding = "UTF-8"; //默认编码  
            }
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));
            string retString = reader.ReadToEnd();
            //解析josn
            JObject jo = JObject.Parse(retString);
            Response.Write(jo["message"]["mmmm"].ToString());
          
        } 

3.其他方式

        /// <summary>
        /// POST请求
        /// </summary>
        /// <param name="url">请求地址</param>
        /// <param name="data">请求内容</param>
        /// <returns></returns>
        public string Post(string data, string url)
        {
            //先根据用户请求的uri构造请求地址
            string serviceUrl = url;
            //创建Web访问对象
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
            //把用户传过来的数据转成“UTF-8”的字节流
            byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data);

            myRequest.Method = "POST";
            myRequest.ContentLength = buf.Length;
            myRequest.ContentType = "application/json";
            myRequest.MaximumAutomaticRedirections = 1;
            myRequest.AllowAutoRedirect = true;
            //发送请求
            Stream stream = myRequest.GetRequestStream();
            stream.Write(buf, 0, buf.Length);
            stream.Close();

            //获取接口返回值
            //通过Web访问对象获取响应内容
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            //通过响应内容流创建StreamReader对象，因为StreamReader更高级更快
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            //string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//如果有编码问题就用这个方法
            string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
            reader.Close();
            myResponse.Close();
            return returnXml;

        }