WEB服務(wù)初級(jí)編程

內(nèi)容分布式計(jì)算互聯(lián)網(wǎng)分布式計(jì)算標(biāo)準(zhǔn)定義發(fā)布使用其它特性分布式計(jì)算ProcedureCallRemoteProcedureCall(RPC)TuxedoCORBARMI/IIOP/EJB基于瀏覽器客戶端分布式計(jì)算RichClientJAVAAPPLETJAVASCRIPT/AJAXCOM/COM+/DNAWebService/SOAP/SOA互聯(lián)網(wǎng)分步式計(jì)算InternetApplicationDevices,

BrowsersOSand

local

servicesVerticaland

portal

serviceApp-specific

WebServiceBuildingblock

WebServiceAccessApplicationCallServicesWebServices

Contract基于互聯(lián)網(wǎng)分布式計(jì)算標(biāo)準(zhǔn)HTTPXMLSOAP(SimpleObjectAccessProtocol)WebServiceDescriptionLanguage(WSDL)DISCOUDDI(UniversalDiscovery,Description,andIntegration)WEB服務(wù)架構(gòu)WebServiceWebServiceClientDiscoveryRequest

discoReturndisco(XML)DescriptionRequestWSDLReturnWSDL(XML)ProtocolRequest.asmxReturnresponse(XML)定義WebServiceDirective(頁(yè)面定義)SettingsforASP.NETcompilers<%@WebServiceLanguage=valueClass=value%>WebMethodAttribute(后臺(tái)代碼定義)CodeDeclarationSyntaxOutlineInline(inC#)<%@WebService

Language=“C#“

Class=“MathService“%>

using

System.Web.Services;

public

class

MathService:WebService{

[WebMethod]

...<%@WebService

Class=“MyClass.MyWebService“%>定義<%@WebService

Language=“C#“

Class=“MathService“%>

usingSystem;

using

System.Web.Services;

public

class

MathService

{

[WebMethod]

public

int

Subtract(inta,intb)

{

returna-b;

}

public

int

Subtract_vs(inta,intb)

{

returnb-a;

}

}發(fā)布ExposeWebServiceandWebServicemethodsCreateaWebServiceproxyandanassemblyGenerateproxywithWebServiceUtiltoolCreateanassemblyEnablesdeveloperstoprogramagainstWebServicesPublishWSDLcontractandHTMLdescriptionWebServiceclientsCanbeWebapplicationsorbrowsers思考:代理類,SOAP協(xié)議間數(shù)據(jù)如何傳遞和轉(zhuǎn)換?發(fā)現(xiàn).discofileXML-basedfilecontaininglinkstoresourcesforretrievingWSDLStoredintheserver‘srootdirectoryAccessviaURLanddynamicdiscoverydocumentStartdiscoveringwiththeWebServiceUtiltoolAutomaticallycreatedbyVisualStudio.NETGlobaldirectoryofWebServicesthroughUDDIUniversalDiscovery,Description,andIntegration()使用WebService

DeveloperWebApplication

DeveloperWebServer1ServiceAppasmx.aspxWebServer2ServiceAppProxyWebForm使用CreateclientproxyclassInput:WSDLcontractProxylanguageandprotocolOutput:Singlesourcefileinspecifiedlanguage,containing:ProxyclassCodefornetworkinvocationandmarshallingCommand-lineexample:webserviceutil/c:proxy/l:C#

/namespace:MathServiceSpaceMathService.sdl使用RequestwithoutmethodnameandparametersHTMLdescriptionofWebServiceServicecapabilities,methods,protocolsWebServicecanreturnWSDLHTTP-GET,HTTP-POST,andHTTP-SOAPRequestwithparameter“?SDL”FormalWSDLdescriptionofWebServiceXML-basedgrammarCanbeusedasinputforWebServiceUtil.exe使用(通過(guò)HTTP協(xié)議)WebServicesareURLaddressableHTTPrequestProtocolsHTTP-GETMethodnameandargumentsinURLHTTP-POSTMethodnameandargumentsinPOSTbodyHTTP-SOAPXMLgrammarforAddressingtheWebServiceReturningresults使用(HTTP/GET/POST)http://server/appl/service.asmx/method?param=valueStandardHTTP-GETMethodname=PATHINFOMethodarguments=URLquerystringQuerystringkey=parameternameMultipleparametersOnlyprimitive.NETruntimedatatypesResultisanXMLdocumentAny.NETdatatypeHTTP-POSTSimilartoGET,butwithargumentsintheformbody使用(HTTP/SOAP調(diào)用)XMLgrammarforWebServicemethod,methodparameters,resultsSupportsallstandard.NETdatatypesandvalueclassesAdditionally:classes,structs,datasetsClassandstructmarshallingSerializationinXMLformatWSDLXMLgrammar,defining:ServicesandportsthatcommunicateviamessagesBindingSpecifyaprotocoloradataformatforamessageoraportExtensionsforSOAP1.1,HTTPGET/POST,andMIMEPublicdescriptionofaWebServiceanditscontentWSDL

contractCoreElementsofWSDLservice,port,andportTypeoperationsandmessagesWSDL<definitions

name=“serviceName“>

<import

namespace=“http://namespacePath“

location=“http://path/fileName.wsdl“>

<portType

name=“portNameType“>

<operation

name=“opName“>

<input

message=“msgNameInput“/>

<output

message=“msgNameOutput“/>

</operation>

</portType>

<binding>

<soap:operation

soapAction=“http://...“/>

</binding>

<service

name=“serviceName“>

<po