引言
随着手机及移动设备的普及，移动端的应用也进入了热潮。以前PC端的门户网站，大多也均推出了适配移动设备的网站或者APP，再差的也注册了个公众号。在移动应用开发中，目前据我所了解到的解决方案有：1、原生态APP开发；2、适配移动设备的JS+HTML网站，套上跨平台的“马甲”；3、微信小程序及公众号（其实和第2点一样，套了微信的壳）。其中运用JS+HTML的应用占据大部分，这个比例是多少我没有统计和查询相关数据，反正就是很多吧。而JS+HTML移动开发中，大多采用的框架是，前端页面加上WebService。因此，引出我们今天要说的话题：ajax调用handler，使用HttpWebRequest访问WCF服务。说了这么多，其实就是想表明：现在移动开发很热，大家都采用“JS+HTML+WebService+套娃”这种架构，我分享的这个是给大家在这种架构中开发，提供一个解决方案。还是大白话适合我，不过偶尔也要装装逼，吹吹现在的互联网+时代。
正文
言归正传，移动应用的开发采用 “JS+HTML+WebService+套娃”架构，以下均简称这种架构，前端通过JS（JQuery、React等等）和HTML进行呈现和业务操作，再通过ajax请求后台服务数据，服务端以API形式开发接口（WebService、WCF等等）。.net平台中，服务端采用WCF提供API接口，是不错的选择。出于安全考虑，服务端一般不直接开放给客户端直接调用，客户需通过web服务器，中转调用webservice。中转的程序只写一次就可以了，我这里采用了一般处理程序handler。
首先，客户端通过ajax调用handler：
function Commit1() { ???var req = {}; ???req.Name = "测试1"; ???req.Age = "30"; ???var dvalue = JSON.stringify(req); ???var para = { action: "GetPersonDetail", data: dvalue }; ???ajaxWCFService(para, false, CommitSuc);}function CommitSuc(data) { ???data = $.parseJSON(data); ???alert("Name:" + data.Name + "，Age:" + data.Age);}//调用服务接口function ajaxWCFService(param, async, sucFunc) { ???var hUrl = document.URL; ???var pathName = document.location.pathname; ???var pos = hUrl.indexOf(pathName); ???var url = hUrl.substring(0, pos); ???url += "/handle/BaseHandler.ashx"; ???$.ajax({ ???????type: "post", ???????url: url, ???????data: param, ???????async: async, ???????success: sucFunc ???});}Handler做为中转，只开放给网站服务端，对客户端不开放，通过HttpWebRequest访问服务端，我这里采用了WCF：
public void ProcessRequest(HttpContext context) ???????{ ???????????string action = context.Request["action"]; ???????????string Data = context.Request["data"]; ???????????//Data = "Name=testc&Age=30"; ???????????string url = "http://localhost:28380/Service1.svc/" + action; ???????????//获取服务端返回信息 ???????????string result = postSend(url, Data); ???????????context.Response.Write(result); ???????} ???????public string postSend(string url, string param) ???????{ ???????????Encoding myEncode = Encoding.GetEncoding("UTF-8"); ???????????byte[] postBytes = Encoding.UTF8.GetBytes(param); ???????????HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url); ???????????req.Method = "POST"; ???????????req.ContentType = "application/x-www-form-urlencoded;charset=UTF-8"; ???????????req.ContentLength = postBytes.Length; ???????????try ???????????{ ???????????????using (Stream reqStream = req.GetRequestStream()) ???????????????{ ???????????????????reqStream.Write(postBytes, 0, postBytes.Length); ???????????????} ???????????????using (WebResponse res = req.GetResponse()) ???????????????{ ???????????????????using (StreamReader reader = new StreamReader(res.GetResponseStream())) ???????????????????{ ???????????????????????string result = reader.ReadToEnd(); ???????????????????????return result; ???????????????????} ???????????????} ???????????} ???????????catch (WebException ex) ???????????{ ???????????????HttpWebResponse res = (HttpWebResponse)ex.Response; ???????????????StreamReader reader = new StreamReader(res.GetResponseStream()); ???????????????string result = reader.ReadToEnd(); ???????????????string IsSucceed = "false"; ???????????????string ErrorMsg = "Hander:" + ex.Message + " StackTrace:" + ex.StackTrace+"\r\n ErrorResponse:" + result; ???????????????var success = new { IsSucceed, ErrorMsg }; ???????????????return JSONHelper.ToJSON(success); ???????????} ???????}接着，WCF服务端首先是契约定义：
[OperationContract] ???????[WebInvoke(UriTemplate = "GetPersonDetail", Method = "POST", BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Json)] ???????Stream GetPersonDetail(Stream req);
WCF方法的实现：
???????public Stream GetPersonDetail(Stream stream) ???????{ ?????????????StreamReader sr = new StreamReader(stream); ???????????string s = sr.ReadToEnd(); ???????????sr.Dispose(); ???????????JObject jo = JObject.Parse(s); ???????????string Name = jo["Name"].ToString(); ???????????string Age = jo["Age"].ToString(); ???????????var result = new Person() ???????????{ ???????????????IsSucceed = true, ???????????????Name = "Service Back:" + Name, ???????????????Age = "Service Back:" + Age ???????????}; ???????????return new MemoryStream(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(result))); ????????}至此，“JS+HTML+WebService+套娃”框架基本完成，后面就是添砖加瓦的工作的，只需要写JS页面操作及WCF数据访问即可。
好了今天就写到这，如果这篇文章对你有所帮助，请推荐一下！欢迎转截，请注明出处！
ajax调用handler，使用HttpWebRequest访问WCF服务
原文地址：https://www.cnblogs.com/lisweden/p/8421221.html