客户端与服务端Post报文构造请求及Http Post与Get请求方法

客户端

namespace Client.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/
        public ActionResult Index()
        {
            string url = ""; // 这里我们还不知道服务器的url，因此留空
            
            #region 构造POST请求
            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.Host = "localhost:14340";
            string body = "client_id=123&redirect_uri="+url+"&response_type=code";
            byte[] bodyBytes = Encoding.UTF8.GetBytes(body);
            Stream requestStream = request.GetRequestStream();
            requestStream.Write(bodyBytes,0,bodyBytes.Length);
            #endregion

            #region 发送请求并取得响应
            // 必须使用HttpWebRequest.GetResponse()方法，请求才能被发送并取得响应
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
            StreamReader sr = new StreamReader(response.GetResponseStream());
            ViewBag.Response = sr.ReadToEnd();
            #endregion

            return View();
        }
    }
}

服务器端

namespace Server.Models
{
    /// <summary>
    /// 对于POST请求，必须对请求体的所有参数建立一个模型类。
    /// </summary>
    public class RequestArgs
    {
        public string client_id { get; set; }
        public string redirect_uri { get; set; }
        public string response_type { get; set; }
    }
}

namespace Server.Controllers
{
    public class ApiTestController : ApiController
    {
        public HttpResponseMessage Post(RequestArgs args)
        {
            string client_id = args.client_id;
            string redirect_uri = args.redirect_uri;
            string response_type = args.response_type;
            return Request.CreateResponse(HttpStatusCode.OK, "I have received your message. Client_id = "+client_id+", RedirectUri = "+redirect_uri+"response_type = "+response_type);
        }
    }
}

private string HttpPost(string Url, string postDataStr)
        {
 
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            byte[] data = Encoding.UTF8.GetBytes(postDataStr);
            request.ContentLength = data.Length;
            Stream myRequestStream = request.GetRequestStream();
            myRequestStream.Write(data, 0, data.Length);
            myRequestStream.Close();
 
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
            string retString = myStreamReader.ReadToEnd();
            myStreamReader.Close();
            myResponseStream.Close();
 
            return retString;
        }
 
        public string HttpGet(string Url, string urlParams = null)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (string.IsNullOrEmpty(urlParams) ? "" : "?") + urlParams);
            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();
 
            return retString;
        }