web服務初級編程

1、WEB服務初級編程,祝偉華網絡新型服務技術中心,內容,分布式計算互聯網分布式計算標準定義發(fā)布使用其它特性,分布式計算,Procedure CallRemote Procedure Call (RPC)TuxedoCORBARMI/IIOP/EJB 基于瀏覽器客戶端分布式計算Rich ClientJAVA APPLETJAVASCRIPT/AJAXCOM/COM+/DNAWeb Service/SOAP/S

2、OA,互聯網分步式計算,,,Application,Devices,Browsers,OS andlocal services,Vertical andportal service,App-specificWeb Service,Building blockWeb Service,,Access Application,Call Services,,,Web ServicesContract,,,基于互聯網分布式計算標準,H

3、TTPXMLSOAP (Simple Object Access Protocol)Web Service Description Language (WSDL)DISCOUDDI (Universal Discovery, Description, and Integration ),WEB服務架構,Web Service,Web ServiceClient,定義,WebService Directive (頁面定義)S

4、ettings for ASP.NET compilersWebMethod Attribute (后臺代碼定義)Code Declaration SyntaxOutlineInline (in C#),using System.Web.Services;public class MathService : WebService { [ WebMethod ]...,,定義,using System;usi

5、ng System.Web.Services;public class MathService{ [WebMethod] public int Subtract(int a, int b) { return a - b; } public int Subtract_vs(int a, int b) { return b - a; }},發(fā)布,Expose Web

6、 Service and Web Service methodsCreate a Web Service proxy and an assemblyGenerate proxy with WebServiceUtil toolCreate an assemblyEnables developers to program against Web ServicesPublish WSDL contract and HTML des

7、criptionWeb Service clientsCan be Web applications or browsers思考: 代理類, SOAP協議間數據如何傳遞和轉換?,發(fā)現,.disco fileXML-based filecontaining links to resources for retrieving WSDLStored in the server‘s root directoryAccess via

8、 URL and dynamic discovery documentStart discovering with the WebServiceUtil toolAutomatically created by Visual Studio.NETGlobal directory of Web Services through UDDIUniversal Discovery, Description, and Integratio

9、n (http://www.uddi.org),使用,Web ServiceDeveloper,Web ApplicationDeveloper,Web Server 1,Service App,asmx,.aspx,Web Server 2,Service App,Proxy,Web Form,,,使用,Create client proxy classInput:WSDL contractProxy language an

10、d protocolOutput:Single source file in specified language, containing:Proxy classCode for network invocation and marshallingCommand-line example: webserviceutil /c:proxy /l:C# /namespace:MathServiceSpace MathSer

11、vice.sdl,使用,Request without method name and parametersHTML description of Web ServiceService capabilities, methods, protocolsWeb Service can return WSDLHTTP-GET, HTTP-POST, and HTTP-SOAPRequest with parameter “?SDL”

12、Formal WSDL description of Web ServiceXML-based grammarCan be used as input for WebServiceUtil.exe,使用 (通過HTTP協議),Web Services are URL addressableHTTP requestProtocolsHTTP-GETMethod name and arguments in URLHTTP-P

13、OSTMethod name and arguments in POST bodyHTTP-SOAPXML grammar forAddressing the Web ServiceReturning results,使用 (HTTP/GET/POST),http://server/appl/service.asmx/method?param=valueStandard HTTP-GETMethod name = PATH

14、INFOMethod arguments = URL query stringQuery string key = parameter nameMultiple parametersOnly primitive .NET runtime data typesResult is an XML documentAny .NET data typeHTTP-POSTSimilar to GET, but with argume

15、nts in the form body,使用 (HTTP/SOAP調用),XML grammar forWeb Service method, method parameters, resultsSupports all standard .NET data types and value classesAdditionally: classes, structs, datasetsClass and struct marsh

16、allingSerialization in XML format,WSDL,XML grammar, defining:Services and ports that communicate via messagesBindingSpecify a protocol or a data format for a message or a portExtensions for SOAP 1.1, HTTP GET/POST,

17、and MIMEPublic description of a Web Service and its contentWSDL contractCore Elements of WSDLservice, port, and portTypeoperations and messages,WSDL, ,高級特性