提供基于HttpWebRequest的请求的应用类，其中包含：get请求(带参或不带参)、post请求、文件传输请求
方法的具体说明：
PostHttp：post请求，支持三种提交模式：FROM、JSON、XML
GetHttp：get请求(带参或不带参)
PostFile：文件传输请求
/// <summary> /// 提供HttpWebRequest请求的相关封装. /// 本接口所提供的方法均不含异常拦截处理，请在调用的主方法中去拦截请求异常. /// </summary> public static class Request { #region post 请求 public enum PostType { /// <summary> /// 表单模式，传入参数格式如：roleId=1&uid=2 /// </summary> FROM = 0, /// <summary> /// JSON格式字符串，格式如：{k:v,k2:v2,k3:{kk1:vv1}} /// </summary> JSON = 1, /// <summary> /// XML模式 /// </summary> XML = 2 } public static string PostHttp(string url, string body, PostType type = PostType.FROM) { string resStr = string.Empty; switch (type) { case PostType.FROM: resStr = PostForm(url, body); break; case PostType.JSON: resStr = PostJson(url, body); break; case PostType.XML: resStr = PostXml(url, body); break; default: resStr = PostForm(url, body); break; } return resStr; } #region post请求几种方式(私有) /// <summary> /// POST表单 /// </summary> /// <param name="url"></param> /// <param name="body"></param> /// <returns></returns> private static string PostForm(string url, string body) { string resStr = string.Empty; byte[] bs = Encoding.UTF8.GetBytes(body); HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url); myRequest.Method = "POST"; myRequest.ContentType = "application/x-www-form-urlencoded"; myRequest.ContentLength = bs.Length; using (Stream reqStream = myRequest.GetRequestStream()) { reqStream.Write(bs, 0, bs.Length); } using (HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse()) { StreamReader sr = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8); resStr = sr.ReadToEnd(); sr.Close(); } myRequest.Abort(); return resStr; } /// <summary> /// POST XML /// </summary> /// <param name="url">请求url(不含参数)</param> /// <param name="body">请求body. soap"text/xml; charset=utf-8"xml字符串</param> /// <returns></returns> private static string PostXml(string url, string body) { HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url); httpWebRequest.ContentType = "text/xml;charset=utf-8"; httpWebRequest.Method = "POST"; //httpWebRequest.Timeout = timeout;//设置超时 httpWebRequest.Headers.Add("SOAPAction", "http://tempuri.org/mediate"); byte[] btBodys = Encoding.UTF8.GetBytes(body); httpWebRequest.ContentLength = btBodys.Length; httpWebRequest.GetRequestStream().Write(btBodys, 0, btBodys.Length); #region 取消异常拦截 //HttpWebResponse httpWebResponse; //try //{ // httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse(); //} //catch (WebException ex) //{ // httpWebResponse = (HttpWebResponse)ex.Response; //} #endregion HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse(); StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream(), Encoding.UTF8); string responseContent = streamReader.ReadToEnd(); httpWebResponse.Close(); streamReader.Close(); httpWebRequest.Abort(); return responseContent; } /// <summary> /// POST json /// </summary> /// <param name="url"></param> /// <param name="JSONData"></param> /// <returns></returns> private static string PostJson(string url, string JSONData) { string result = string.Empty; //byte[] bs = Encoding.UTF8.GetBytes(body); HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url); myRequest.Method = "POST"; myRequest.ContentType = "application/json"; using (var streamWriter = new StreamWriter(myRequest.GetRequestStream())) { streamWriter.Write(JSONData); streamWriter.Flush(); streamWriter.Close(); } var httpResponse = (HttpWebResponse)myRequest.GetResponse(); using (var streamReader = new StreamReader(httpResponse.GetResponseStream())) { result = streamReader.ReadToEnd(); } httpResponse.Close(); myRequest.Abort(); return result; } #endregion #endregion #region get请求 /// <summary> /// get请求 /// </summary> /// <param name="url">请求url(不含参数)</param> /// <param name="postDataStr">参数部分：roleId=1&uid=2</param> /// <param name="timeout">等待时长(毫秒)</param> /// <returns></returns> public static string GetHttp(string url, string postDataStr,int timeout=2000) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + (postDataStr == "" ? "" : "?") + postDataStr); request.Method = "GET"; request.ContentType = "text/html;charset=UTF-8"; request.Timeout = timeout;//等待 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.Close(); request.Abort(); return retString; } #endregion #region 文件传输请求 /// <summary> /// 传输文件到指定接口 /// </summary> /// <param name="url"></param> /// <param name="filePath">文件物理路径</param> /// <returns></returns> public static string PostFile(string url, string filePath) { string resStr = string.Empty; // 初始化HttpWebRequest HttpWebRequest httpRequest = (HttpWebRequest)HttpWebRequest.Create(url); // 封装Cookie Uri uri = new Uri(url); Cookie cookie = new Cookie("Name", DateTime.Now.Ticks.ToString()); CookieContainer cookies = new CookieContainer(); cookies.Add(uri, cookie); httpRequest.CookieContainer = cookies; if (!File.Exists(filePath)) { return "文件不存在"; } FileInfo file = new FileInfo(filePath); // 生成时间戳 string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x"); byte[] boundaryBytes = Encoding.ASCII.GetBytes(string.Format(" --{0}-- ", strBoundary)); // 填报文类型 httpRequest.Method = "Post"; httpRequest.Timeout = 1000 * 120; httpRequest.ContentType = "multipart/form-data; boundary=" + strBoundary; // 封装HTTP报文头的流 StringBuilder sb = new StringBuilder(); sb.Append("--"); sb.Append(strBoundary); sb.Append(Environment.NewLine); sb.Append("Content-Disposition: form-data; name=""); sb.Append("file"); sb.Append(""; filename=""); sb.Append(file.Name); sb.Append("""); sb.Append(Environment.NewLine); sb.Append("Content-Type: "); sb.Append("multipart/form-data;"); sb.Append(Environment.NewLine); sb.Append(Environment.NewLine); byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sb.ToString()); // 计算报文长度 long length = postHeaderBytes.Length + file.Length + boundaryBytes.Length; httpRequest.ContentLength = length; // 将报文头写入流 Stream requestStream = httpRequest.GetRequestStream(); requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length); byte[] buffer = new byte[4096]; int bytesRead = 0; using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read)) { while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) { requestStream.Write(buffer, 0, bytesRead); } } // 将报文尾部写入流 requestStream.Write(boundaryBytes, 0, boundaryBytes.Length); // 关闭流 requestStream.Close(); using (HttpWebResponse myResponse = (HttpWebResponse)httpRequest.GetResponse()) { StreamReader sr = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8); resStr = sr.ReadToEnd(); sr.Close(); //Console.WriteLine("反馈结果" + responseString); } httpRequest.Abort(); return resStr; } #endregion }