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WCF4.0 –- RESTful WCF Services (1) (入门)
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WCF 很好的支持了 REST 的開發(fā)， 而 RESTful 的服務(wù)通常是架構(gòu)層面上的考慮。 因為它天生就具有很好的跨平臺跨語言的集成能力，幾乎所有的語言和網(wǎng)絡(luò)平臺都支持 HTTP 請求，無需去實現(xiàn)復(fù)雜的客戶端代理，無需使用復(fù)雜的數(shù)據(jù)通訊方式既可以將我們的服務(wù)暴露給任何需要的人，無論他使用 VB、Ruby、JavaScript，甚至是 HTML FORM，或者直接在瀏覽器地址欄輸入。?
WCF 中通過?WebGetAttribute、WebInvokeAttribute (GET/PUT/POST/DELETE)、UriTemplate?定義 REST 的服務(wù)的調(diào)用方式， 通過WebMessageFormat (Xml/Json)?定義消息傳遞的格式。1. 契約
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using?System;??using?System.Collections.Generic;??using?System.Runtime.Serialization;??using?System.ServiceModel;??using?System.ServiceModel.Web;????namespace?WcfRESTfulSvc1??{??????[ServiceContract]??????public?interface?ITaskService??????{??????????[OperationContract]??????????[WebGet(UriTemplate="Tasks/Xml",?ResponseFormat=WebMessageFormat.Xml)]??????????List<Task>?GetTasksXml();????????????[OperationContract]??????????[WebGet(UriTemplate?=?"Tasks/Json",?ResponseFormat?=?WebMessageFormat.Json)]??????????List<Task>?GetTasksJson();????????????[OperationContract]??????????[WebInvoke(UriTemplate="Task/{title}",?Method="GET",?ResponseFormat=WebMessageFormat.Json)]??????????Task?GetTasksByTitle(string?title);??????}??????????[DataContract]??????public?class?Task??????{??????????[DataMember]??????????public?string?Title?{?get;?set;?}??????????[DataMember]??????????public?string?Detail?{?get;?set;?}??????????[DataMember]??????????public?DateTime?CreatedDate?{?get;?set;?}??????}??}?? ?2. 實現(xiàn)
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using?System;??using?System.Collections.Generic;??using?System.Linq;????namespace?WcfRESTfulSvc1??{??????public?class?TaskService?:?ITaskService??????{??????????public?List<Task>?GetTasksXml()??????????{??????????????return?GetData();??????????}????????????public?List<Task>?GetTasksJson()??????????{??????????????return?GetData();??????????}????????????public?Task?GetTasksByTitle(string?title)??????????{??????????????return?GetData().Where(t?=>?t.Title?==?title).FirstOrDefault();??????????}????????????private?static?List<Task>?GetData()??????????{??????????????return?new?List<Task>??????????????{??????????????????new?Task?{?Title="Task1",?Detail="Do?Something?1",?CreatedDate=DateTime.Now?},??????????????????new?Task?{?Title="Task2",?Detail="Do?Something?2",?CreatedDate=DateTime.Now?},??????????????????new?Task?{?Title="Task3",?Detail="Do?Something?3",?CreatedDate=DateTime.Now?},??????????????????new?Task?{?Title="Task4",?Detail="Do?Something?4",?CreatedDate=DateTime.Now?},??????????????????new?Task?{?Title="Task5",?Detail="Do?Something?5",?CreatedDate=DateTime.Now?},??????????????};??????????}??????}??}??
通過 WCF 4.0 里創(chuàng)建的 WCF Service Application 發(fā)布REST服務(wù)很簡單，只需要在 svc 的 Markup 里加上 Factory：
<%@ ServiceHost Language="C#" Debug="true" Service="WcfRESTfulSvc1.TaskService" CodeBehind="TaskService.svc.cs"Factory="System.ServiceModel.Activation.WebServiceHostFactory"%>
BTW: 不過這樣，WCF的Metadata就不能訪問到了，也就說不能訪問到svc的wsdl了。
OK，在瀏覽器中鍵入?http://localhost:2571/TaskService.svc/Tasks/Xml? 就能得到結(jié)果：
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<ArrayOfTask?xmlns="http://schemas.datacontract.org/2004/07/WcfRESTfulSvc1"?xmlns:i="http://www.w3.org/2001/XMLSchema-instance">????<Task>??????<CreatedDate>2011-03-09T21:51:13.3376004+08:00</CreatedDate>??????<Detail>Do?Something?1</Detail>??????<Title>Task1</Title>????</Task>????<Task>??????<CreatedDate>2011-03-09T21:51:13.3376004+08:00</CreatedDate>??????<Detail>Do?Something?2</Detail>??????<Title>Task2</Title>????</Task>????<Task>??????<CreatedDate>2011-03-09T21:51:13.3376004+08:00</CreatedDate>??????<Detail>Do?Something?3</Detail>??????<Title>Task3</Title>????</Task>????<Task>??????<CreatedDate>2011-03-09T21:51:13.3376004+08:00</CreatedDate>??????<Detail>Do?Something?4</Detail>??????<Title>Task4</Title>????</Task>????<Task>??????<CreatedDate>2011-03-09T21:51:13.3376004+08:00</CreatedDate>??????<Detail>Do?Something?5</Detail>??????<Title>Task5</Title>????</Task>??</ArrayOfTask>??
客戶端的調(diào)用利用System.Net.WebClient也很容易：
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var?client?=?new?WebClient();??this.txtResponse.Text?=?client.DownloadString(url);??
Json的返回結(jié)果：
[{"CreatedDate":"//Date(1299687080328+0800)//","Detail":"Do Something 1","Title":"Task1"},{"CreatedDate":"//Date(1299687080328+0800)//","Detail":"Do Something 2","Title":"Task2"},{"CreatedDate":"//Date(1299687080328+0800)//","Detail":"Do Something 3","Title":"Task3"},{"CreatedDate":"//Date(1299687080328+0800)//","Detail":"Do Something 4","Title":"Task4"},{"CreatedDate":"//Date(1299687080328+0800)//","Detail":"Do Something 5","Title":"Task5"}]
再來看看利用jQuery如何調(diào)用這個服務(wù)：
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<mce:script?type="text/javascript"?language="JavaScript"><!--??????$(document).ready(function?()?{??????????$("#btnGet").click(function?()?{??????????????var?url?=?$("#txtUrl").val();??????????????$.get(url,?function?(data)?{??????????????????for?(var?i?=?0;?i?<?data.length;?i++)??????????????????????$("#divResponse").append("<li>"?+??????????????????????data[i].Title?+?" - "?+??????????????????????data[i].Detail?+?"</li>");??????????????});??????????});??????});??
【REST WCF系列】RESTful WCF Services (1) (入門)RESTful WCF Services (2) (實現(xiàn)增，刪，改，查)RESTful WCF Services (3) (Raw Stream)RESTful WCF Services (4) (Basic Security)RESTful WCF Services (實例) (并發(fā)同步服務(wù) SyncService)
http://blog.csdn.net/fangxing80/article/details/6235662
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