Chuyn Thng mi in t

Cng ngh Web services

Thng 11-2006Khoa Cng ngh thng tinB mn HTTT

Ni dung trnh by

Cc ng dng phn tnDistributed ApplicationD liung dngphn tnD liu

Kin trc hng dch vService-Oriented Architecture-SOAPublishFindBind

Web Service

Web service l g

c im

Kin trc ca Web ServicePublishFindBindInternet

Kin trc ca Web ServiceAny ClientSOAPSOAPSOAP

Web service providerIIS

Web service consumerS dng Web service do WS Provider cung cp xy dng ng dng

Web service broker

M hnh tng tc gia cc thnh phn4

Nn tng ca Web ServiceWeb ServiceXMLSOAPHTTP

HTTP Hyper text transfer protocol

XML Extend Markup Language

SOAP(1)An envelope for handling extensibility and modularity An encoding mechanism for representing types within an envelope

SOAP (2)POST /WebCalculator/Calculator.asmx HTTP/1.1Content-Type: text/xmlSOAPAction: http://tempuri.org/AddContent-Length: 386

...

SOAP(3) - Message StructureSOAP MessageSOAP EnvelopeSOAP HeaderSOAP BodyMessage Name & DataHeadersHeadersXML-encoded SOAP message name & data contains SOAP message nameIndividual headers encloses headers encloses payloadProtocol binding headersThe complete SOAP message

SOAP(4) - Example of a SOAP RequestPOST /StockQuote HTTP/1.1Host: www.stockquoteserver.comContent-Type: text/xml; charset="utf-8"Content-Length: nnnnSOAPAction: "Some-URI

DIS

SOAP(5) - Example of a SOAP ResponseHTTP/1.1 200 OKContent-Type: text/xml; charset="utf-8"Content-Length: nnnn

34.5

Lp trnh Web service bng VS.NET 2003

Lp trnh Web service (1) SystemSystem.DataSystem.WebSystem.Web.WebservicesSystem.XmlFile *.asmxFile global.asaxFile web.configTh mc Bin

Lp trnh Web service (2)Thm ch th [Web Method]

Lp trnh Web service (3)

Lp trnh Web service (3)[WebMethod(BufferResponse=false)]public Transactions GetTransactionHistory(){//implementation code}[WebMethod (Description=This method using for converting .. )]public double ConvertTemperature(double dFahrenheit){return ((dFahrenheit - 32) * 5) / 9;}V d

Lp trnh Web service (4)Dng xc nh cu trc ti liu XML mong mun biu din i tng ca mt lpNamespace : System.Xml.Serialization

Lp trnh Web service (5)[XmlRoot("account")]public class Acct{[XmlElement("description")] public string Description;[XmlElement("number")] public string Number;[XmlElement("type")] public string Type;[XmlElement("balance")] public decimal Balance;[XmlAttribute("status")] public string Status;}

V d 1

Hello 10 C

Lp trnh Web service (6)[return:XmlArray("AccountList")][return:XmlArrayItem("Account")]public Acct[] GetAllAccounts()

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V d 2

Lp trnh Web service (7)[return:XmlArrayItem(ElementName="savingsAcct", Type=typeof(SavingsAcct))][return:XmlArrayItem(ElementName="creditCardAcct", Type=typeof(CreditCardAcct))][WebMethod]public Acct[] GetAllAccounts(){...

V d 3

Lp trnh Web service (8)

Lp trnh Web service provider side(9) Phi khai bo tng minh tt c cc kiu d liu c th c trong mngS dng :XmlInclude Name space System.Xml.Serialization

Lp trnh Web service provider side(10)V dpublic class Acct{ public string Description; public string Number; public string Type; public decimal Balance; public string Status;}public class SavingsAcct : Acct{ public decimal MinimumBalance;}public class CreditCardAcct : Acct{ public int PayPeriod;}[WebMethod][XmlInclude(typeof(CreditCardAcct))][XmlInclude(typeof(SavingsAcct))][return:XmlArray("AccountList")][return:XmlArrayItem("Account")]public Acct[] GetAllAccounts(){SavingsAcct a = new SavingsAcct();CreditCardAcct cc = new CreditCardAcct();// populate the accountsAcct [] sa = new Acct[2];sa[0] = a;sa[1] = cc;return sa;}

Trin khai Web service

Web Service Consumer

WSDL Documents

Proxy class

S dng Web service trong .NETS dng wsdl.exeS dng VS.NetGi bnh thng nh cc phng thc khcAdd Web References wsdl [options] {URL | Path}wsdl http://www.woodgrovebank.com/services/bank.asmx?wsdl

WSDL Document

Proxy Class

SOAP Request and Response

HTTP Request and Response

Web service and State ManagementS dng i tng Application v Session qun l trng thi ca web service

ng dng ca Web Services

Demo

Hi v p