一个非常轻量级的 Web API Demo,代码量很少,实现了方法拦截器,token校验,异常拦截器,缓存
创建项目:如果选择Web API,项目中东西会比较多,这里选择Empty,把下面的Web API勾上,MVC不要勾
项目目录结构:
Global.asax.cs代码:这里配置方法拦截器和异常拦截器
using System; System.Collections.Generic; System.linq; System.Web; System.Web.http; System.Web.Routing;namespace WebAPIDemo{ public class WebAPIApplication : System.Web.httpApplication { protected voID Application_Start() { GlobalConfiguration.Configuration.Filters.Add(new MyExceptionFilter()); GlobalConfiguration.Configuration.Filters.Add( MyActionFilter()); GlobalConfiguration.Configure(WebAPIConfig.Register); } }}@H_404_79@VIEw Code
MyActionFilter拦截器代码:
Newtonsoft.Json; System.Net.http; System.Text; System.Web.http.Controllers; System.Web.http.Filters; MyActionFilter : ActionFilterattribute { overrIDe OnActionExecuting(httpActionContext actionContext) { object value; if (actionContext.ActionArguments.TryGetValue("token",out value)) { if (value.ToString() != 000") { var errMsg = { errorMsg = token不匹配 }; string str = JsonConvert.SerializeObject(errMsg); httpResponseMessage result = new httpResponseMessage { Content = new StringContent(str,EnCoding.UTF8,application/Json) }; actionContext.Response = result; } } base.OnActionExecuting(actionContext); } }}@H_404_79@VIEw Code
MyExceptionFilter拦截器代码:
MyExceptionFilter : ExceptionFilterattribute { //重写基类的异常处理方法 OnException(httpActionExecutedContext actionExecutedContext) { { errorMsg = 拦截到异常:" + actionExecutedContext.Exception.Message }; JsonConvert.SerializeObject(errMsg); httpResponseMessage result = ) }; actionExecutedContext.Response = result; .OnException(actionExecutedContext); } }}@H_404_79@VIEw Code
一个简单的缓存工具类:
System.Web.Caching; CacheHelper { #region 获取并缓存数据 /// <summary> /// 获取并缓存数据 </summary> <param name="cacheKey">键</param> <param name="func">在此方法中初始化数据<param name="expirationSeconds">缓存过期时间</param> static T GetValue<T>(string cacheKey,Func<T> func,1)">int expirationSeconds = 0) { object cacheValue = httpruntime.cache.Get(cacheKey); if (cacheValue != null) { return (T)cacheValue; } else { T value = func(); httpruntime.cache.Insert(cacheKey,value,,DateTime.Now.AddSeconds(expirationSeconds),Cache.NoSlIDingExpiration); value; } } #endregion }}@H_404_79@VIEw Code
控制器MyAPIController.cs代码:
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System.Net; WebAPIDemo.Models; WebAPIDemo.Controllers{ [RoutePrefix(API/MyAPI)] MyAPIController : APIController { [httpGet] [Route(GetAction)] public httpResponseMessage GetAction(string token,1)">string param) { var obj = { param = param }; ToJson(obj); } [httpPost] [Route(PostActionpublic httpResponseMessage PostAction( param,[FromBody] MyData data) { Random rnd = Random(); int d = CacheHelper.GetValue<int>(MyCacheKey1 { return rnd.Next(1,1)">10000); },20); data,cache = d.ToString() }; ToJson(obj); } [httpGet] [Route(ErrorActionpublic httpResponseMessage ErrorAction(int a = Convert.ToInt32(abc ToJson(obj); } private httpResponseMessage ToJson( obj) { JsonConvert.SerializeObject(obj); httpResponseMessage result = ) }; result; } }}@H_404_79@VIEw Code
发布:
部署在IIS,用Postman测试:
总结
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