1 前言

http协议详解参考HTTP协议。

WEB常用Get和Post请求。

地址栏参数：url为www.viwofer.com?id=12&name=viwofer则id=12&name=viwofer为地址栏参数。key1=value&key2=value2。

Json参数：{"key1":"value","key2":"value2"}。

2 GET请求

常用Get请求使用地址栏参数

        /// <summary>

        /// Get获取数据

        /// </summary>

        /// <param name="serverUrl">服务Url</param>

        /// <param name="postData">传递参数，格式如“key1=value&key2=value2”</param>

        /// <returns></returns>

        public static string HttpGetConnectToServer(string serverUrl, string postData = "")

        {

            //创建请求

            var request = (HttpWebRequest)WebRequest.Create(serverUrl + "?" + postData);

            request.Method = "GET";

            //设置上传服务的数据格式

            request.ContentType = "application/x-www-form-urlencoded";

            //请求的身份验证信息为默认

            request.Credentials = CredentialCache.DefaultCredentials;

            //请求超时时间

            request.Timeout = ;

            //设置cookie

            request.CookieContainer = cookie;

            try

            {

                //读取返回消息

                return GetResponseAsString(request);

            }

            catch (Exception ex)

            {

                //var result = new ServerResult();

                return "{\"error\":\"connectToServer\",\"error_description\":\"" + ex.Message + "\"}";

            }

        }

3 Post请求

常用Post请求使用地址栏参数和Json格式参数。

3.1 参数为key1=value&key2=value2

        /// <summary>

        /// Post获取数据

        /// </summary>

        /// <param name="serverUrl">服务Url</param>

        /// <param name="postData">传递参数，格式如“key1=value&key2=value2”</param>

        /// <returns></returns>

        public static string HttpPostConnectToServer(string serverUrl, string postData)

        {

            var dataArray = Encoding.UTF8.GetBytes(postData);

            //创建请求

            var request = (HttpWebRequest)HttpWebRequest.Create(serverUrl);

            request.Method = "POST";

            request.ContentLength = dataArray.Length;

            //设置上传服务的数据格式

            request.ContentType = "application/x-www-form-urlencoded";

            //请求的身份验证信息为默认

            request.Credentials = CredentialCache.DefaultCredentials;

            //请求超时时间

            request.Timeout = ;

            //设置cookie

            request.CookieContainer = cookie;

            //创建输入流

            Stream dataStream;

            try

            {

                dataStream = request.GetRequestStream();

            }

            catch (Exception)

            {

                return null;//连接服务器失败

            }

            //发送请求

            dataStream.Write(dataArray, , dataArray.Length);

            dataStream.Close();

            //读取返回消息

            //string res;

            try

            {

                //读取返回消息

                return GetResponseAsString(request);

            }

            catch (Exception ex)

            {

                //连接服务器失败

                return "{\"error\":\"connectToServer\",\"error_description\":\"" + ex.Message + "\"}";

            }

        }

3.2 参数为{"key1":"value","key2":"value2"}

        /// <summary>

        /// Post获取数据

        /// </summary>

        /// <param name="serverUrl">服务Url</param>

        /// <param name="postData">传递参数，格式如“{"key1":"value","key2":"value2"}”</param>

        /// <returns></returns>

        public static string HttpPostJsonConnectToServer(string serverUrl, string postData)

        {

            var dataArray = Encoding.UTF8.GetBytes(postData);

            //创建请求

            var request = (HttpWebRequest)HttpWebRequest.Create(serverUrl);

            request.Method = "POST";

            request.ContentLength = dataArray.Length;

            //设置上传服务的数据格式 json格式的传递参数

            request.ContentType = "application/json";

            //请求的身份验证信息为默认

            request.Credentials = CredentialCache.DefaultCredentials;

            //请求超时时间

            request.Timeout = ;

            //设置cookie

            request.CookieContainer = cookie;

            //创建输入流

            Stream dataStream;

            try

            {

                dataStream = request.GetRequestStream();

            }

            catch (Exception)

            {

                return null;//连接服务器失败

            }

            //发送请求

            dataStream.Write(dataArray, , dataArray.Length);

            dataStream.Close();

            //读取返回消息

            try

            {

                //读取返回消息

                return GetResponseAsString(request);

            }

            catch (Exception ex)

            {

                //连接服务器失败

                //var result = new ServerResult();

                return "{\"error\":\"connectToServer\",\"error_description\":\"" + ex.Message + "\"}";

            }

        }

4 相关代码

        //============================初始化Cookie================================

        private static CookieContainer cookie = new CookieContainer();

        //==================================获取返回参数======================================

        private static string GetResponseAsString(HttpWebRequest request)

        {

            try

            {

                var response = (HttpWebResponse)request.GetResponse();

                var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);

                string res = reader.ReadToEnd();

                reader.Close();//关闭读取流

                response.Close();//关闭响应流

                return res;

            }

            catch (Exception ex)

            {

                return null;

            }

        }

巴特西

C#模拟HTTP协议请求