Bài 10: Thiết kê và lập trình web với ASP.NET - Web services

Thitk & Lp trình Web 2
Bài 10
Web ServicesWeb Services
Ths. TrnTh Bích Hnh
Khoa CNTT Khoa CNTT –– H.KHTNH.KHTN
© 2009 Khoa Công ngh thông tin
Thitk & Lp trình Web 2 – Bài 10: Web Services
NiNi
dungdung
NiNi
dungdung
 Giithiu Web Services
 Kin trúc Web Services
 Lp trình Web Services bng VS.NET
© 2009 Khoa CNTT - HKHTN
2
Thitk & Lp trình Web 2 – Bài 10: Web Services
NiNi
dungdung
NiNi
dungdung
 Giithiu Web Services
 Kin trúc Web Services
 Lp trình Web Services bng VS.NET
© 2009 Khoa CNTT - HKHTN
3
Thitk & Lp trình Web 2 – Bài 10: Web Services
LàmLàm
saosao
thanhthanh
toántoán

hóahóa
đnđn
đinđin
thoithoi
online?online?
LàmLàm
saosao
thanhthanh
toántoán
hóahóa
đnđn
đinđin
thoithoi
online?online?
1
3
Telec om
Internet
2
Pay Bill
PBill
L
thô
ti
Hó
đ
t
Tl
Bank
P

ay
Bill

L
y
thô
ng
ti
n
Hó
a
đ
n
t
T
e
l
ecom
1
Pay Bill Yêu cu Bank chuynkhont Customer Account sang
Telecom Account
2
© 2009 Khoa CNTT - HKHTN
4
Pay Bill Thông báo cho Teleco m bitcpnht tình trng hóa đn đã
thanh toán
3
Thitk & Lp trình Web 2 – Bài 10: Web Services
Web ServiceWeb Service
Web

ServiceWeb

Service
 Là mttp các phng thc đcgithchint xa
thông
qua
mt
đa
ch
URL
thông
qua

mt
đa
ch
URL
1
Internet
Telecom Ser ice
1
3
Telecom Ser
v
ice
2
3
Pay Bill
Bank Service

2
© 2009 Khoa CNTT - HKHTN
5
Thitk & Lp trình Web 2 – Bài 10: Web Services
cc
đimđim
Web ServicesWeb Services
cc
đimđim
Web

ServicesWeb

Services
 T mô t
 Datrênnntng XML
 Có thđcs dng bicácng dng khác
 Chi phí phát trinthp
 D botrì
© 2009 Khoa CNTT - HKHTN
6
Thitk & Lp trình Web 2 – Bài 10: Web Services
NiNi
dungdung
NiNi
dungdung
 Giithiu Web Services
 Kin trúc Web Services
 Lp trình Web Services bng VS.NET
© 2009 Khoa CNTT - HKHTN

7
Thitk & Lp trình Web 2 – Bài 10: Web Services
KinKin
trúctrúc
Web ServicesWeb Services
KinKin
trúctrúc
Web

ServicesWeb

Services
UDDI (Web
Service Broker)
Service Broker)
Publish Find
Internet
Bind
Web Service
Provider
Web Service
Consumer
© 2009 Khoa CNTT - HKHTN
8
Consumer
Thitk & Lp trình Web 2 – Bài 10: Web Services
KinKin
trúctrúc
caca
Web ServicesWeb Services

KinKin
trúctrúc
caca
Web

ServicesWeb

Services
UDDI
WSDL
SOAP SOAP
IIS
A
n
y
Client
SOAP
Web Service
© 2009 Khoa CNTT - HKHTN
9
y
Thitk & Lp trình Web 2 – Bài 10: Web Services
StandardsStandards
StandardsStandards
• SOAP (Simple Object Access Protocol)
Giao
thc
trao
đi
thông

tin
ca
service
theo
đnh
dng
XML
–
Giao
thc
trao
đi
thông
tin
ca
service
theo
đnh
dng
XML
WSDL
(W b
Si
Diti
L)
•
WSDL
(W
e
b

S
erv
i
ce
D
escr
i
p
ti
on
L
anguage
)
– Ngôn ngđct web service
• UDDI (Universal Description Discovery and Integration)
–
Th
mc
lu
tr
thông
tin
v
Web
services
Th
mc
lu
tr
thông

tin
v
Web
services
– Cho phép các công ty đng ký & tìm kim web services
© 2009 Khoa CNTT - HKHTN
10
Thitk & Lp trình Web 2 – Bài 10: Web Services
SOAPSOAP
SOAPSOAP
• Simple Object Access Protocol

–
Cho phép truy

n các thông đip (message) qua giao thc
HTTP
–
S
dng
XML
đ
mô
t
d
liu
–
S
dng
XML

đ
mô
t
d
liu
– X lý
• Re
q
uestor
g
ói thôn
g
tin
y
êu cuvàom

t messa
g
e và
g
i
q
g
g
y

g
g
lên web service

• Web Service phân tích message gi lên và thc thi hàm x
l
ý
y
êu cu.
ý
y
• Ktquđc gói vào mt message và giv cho
Requestor
•
Requestor
phân
tích
message
tr
v
và
hin
th
kt
qu
© 2009 Khoa CNTT - HKHTN
Requestor

phân
tích
message

tr
v

và
hin
th
kt
qu
– ct: />11
Thitk & Lp trình Web 2 – Bài 10: Web Services
VíVí
dd
SOAPSOAP
VíVí
dd
SOAPSOAP
© 2009 Khoa CNTT - HKHTN
12
Thitk & Lp trình Web 2 – Bài 10: Web Services
WSDLWSDL
WSDLWSDL
• Web Service Description Language
– Ngôn ngđct web service
– ct:
© 2009 Khoa CNTT - HKHTN
13
Thitk & Lp trình Web 2 – Bài 10: Web Services
WSDL ExampleWSDL Example
WSDL

ExampleWSDL

Example

© 2009 Khoa CNTT - HKHTN
14
Thitk & Lp trình Web 2 – Bài 10: Web Services
UDDIUDDI
UDDIUDDI
• Universal Description Discovery and Integration

–
Th mclutr thông tin v

web services
– Cho phép doanh nghip đng ký service camìnhvào
danh
sách
các
services
và
tìm
kim
service
ca
nhng
danh
sách
các
services

và
tìm
kim

service

ca
nhng
doanh nghip khác đ s dng
– ct bng WSDL
– Giao tip thông qua SOAP
– cxâydng trong Microsoft .NET platform
– ct:
© 2009 Khoa CNTT - HKHTN
15
Thitk & Lp trình Web 2 – Bài 10: Web Services
NiNi
dungdung
NiNi
dungdung
 Giithiu Web Services
 Kin trúc Web Services
 Lp trình Web Services bng VS.NET
© 2009 Khoa CNTT - HKHTN
16
Thitk & Lp trình Web 2 – Bài 10: Web Services
Mô hình tng tác gia các thành phnMô hình tng tác gia các thành phn
Mô

hình

tng

tác

gia

các

thành

phnMô

hình

tng

tác

gia

các

thành

phn
1
5
1
Pricing Web Service
UDDI Services
3
4
2

Web service developer
xây
dng
&
trin
khai
“
pricing
”
Web service
1
4
Web

service

developer
xây
dng
&

trin
khai
pricing

Web

service
1
Web service developer đng ký & phân loi Web service

2
Web service consumer truy xut UDDI đ tìm “pricing” services
3
Web service consumer chn “pricing” service phù hpnht
4
© 2009 Khoa CNTT - HKHTN
17
Web service consumer gi& nhnktqu t web service
5
Thitk & Lp trình Web 2 – Bài 10: Web Services
LptrìnhWebservicebng VS NETLptrìnhWebservicebng VS NET
Lp

trình

Web

service

bng

VS
.
NETLp

trình

Web

service

bng

VS
.
NET
Web service programming - provider side
1
1
Web Service Provider
Response
Request
Web Service Consumer
Request
© 2009 Khoa CNTT - HKHTN
18
Web service programming - consumer side
2
2
Thitk & Lp trình Web 2 – Bài 10: Web Services
Web Service Provider SideWeb Service Provider Side
Web

Service

Provider

SideWeb

Service

Provider

Side
 Loi Project – New Website
Web Service Provider
–
ASP.NET Web Service hoc
– ASP.NET Web Application
© 2009 Khoa CNTT - HKHTN
19
Thitk & Lp trình Web 2 – Bài 10: Web Services
Web Service ClassWeb Service Class
Web

Service

ClassWeb

Service

Class
// Service.asmx
<%@ WebService Language="C#" CodeBehind="~/App_Code/Service.cs"
Cl "
Si
"
%>
// Service.asmx
<%@ WebService Language="C#" CodeBehind="~/App_Code/Service.cs"

Cl "
Si
"
%>
Cl
ass=
"
S
erv
i
ce
"

%>
Cl
ass=
"
S
erv
i
ce
"

%>
// Service.cs// Service.cs
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System;

using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
[WebService(Namespace = " />[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class
Service : System.Web.Services.WebService
{
bli S i () { }
[WebService(Namespace = " />[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class
Service : System.Web.Services.WebService
{
bli S i () { }
pu
bli
c
S
erv
i
ce
()

{

}
[WebMethod]
public string HelloWorld() {
return "Hello World";
pu
bli

c
S
erv
i
ce
()

{

}
[WebMethod]
public string HelloWorld() {
return "Hello World";
© 2009 Khoa CNTT - HKHTN
20
}
}
}
}
Thitk & Lp trình Web 2 – Bài 10: Web Services
KhaiKhai
báobáo
phngphng
thcthc
Web ServiceWeb Service
KhaiKhai
báobáo
phngphng
thcthc
Web

ServiceWeb

Service
 B sung ch th [WebMethod] trc khai báo hàm
Cá
th 
tí h

[
WbMthd
]

Cá
c
th
u

c
tí
n
h
c

a
[
W
e
bM
e

th
o
d
]
– BufferResponse
–
CacheDuration
– Description
– EnableSession
TtiOti
[WebMethod(BufferResponse=false)]
pub
li
c
Tr
a
n
sact
i
o
n
s

Get
Tr
a
n
sact
i
o

nHi
sto
r
y()
[WebMethod(BufferResponse=false)]
pub
li
c
Tr
a
n
sact
i
o
n
s

Get
Tr
a
n
sact
i
o
nHi
sto
r
y()
–
T

ransac
ti
on
O
p
ti
on
pub c a sact o s Get a sact o sto y()
{
//implementation code
}
pub c a sact o s Get a sact o sto y()
{
//implementation code
}
[WebMethod (Description=“This method using for converting ” )]
public double ConvertTemperature(double dFahrenheit)
{
[WebMethod (Description=“This method using for converting ” )]
public double ConvertTemperature(double dFahrenheit)
{
© 2009 Khoa CNTT - HKHTN
21
return ((dFahrenheit - 32) * 5) / 9;
}
return ((dFahrenheit - 32) * 5) / 9;
}
Thitk & Lp trình Web 2 – Bài 10: Web Services
XML SerializationXML Serialization
XML

SerializationXML

Serialization
 Dùng đ xác đnh cutrúctàiliu XML mong mun đ
biu
din
đi
tng
ca
mt
lp
biu
din
đi
tng
ca
mt
lp
XmlArray
Namespace : System.Xml.Serialization
XmlElement
XmlRoot
XmlArrayItem
XmlArray
XmlAttribute
XmlInclude
© 2009 Khoa CNTT - HKHTN
22
Thitk & Lp trình Web 2 – Bài 10: Web Services

VíVí
dd
11
––
XmlRootXmlRoot
&&
XmlElementXmlElement
VíVí
dd
1

1

––
XmlRootXmlRoot
&

&

XmlElementXmlElement
<account status=“123”>
[XmlRoot("account")]
public class Acct
{
[
XmlEl
e
m
e
nt

(
"
desc
ri
p
ti
o
n"
)]

<description>Hello</description>
<number>10 </number>
<type>C</type>
<account>
[
ee
( desc p o )]
public string Description;
[
XmlElement("number")]
public string Number;
[
XmlElement
(
"t
yp
e"
)]

[

(yp )]
public string Type;
[
XmlElement("balance")]
public decimal Balance;
[
XmlAttribute
(
"status"
)]

[
()]
public string Status;
}
© 2009 Khoa CNTT - HKHTN
23
Thitk & Lp trình Web 2 – Bài 10: Web Services
VíVí
dd
22
––
XmlArrayXmlArray
&&
XmlArrayItemXmlArrayItem
VíVí
dd
2

2

––
XmlArrayXmlArray
&

&

XmlArrayItemXmlArrayItem
…
[return:
XmlArray("AccountList")]
[return:
XmlArrayItem("Account")]
<AccountList>
<account>
public
A
cct[] GetAllAccounts
()
…
<account>
………
<account>
<account>
….
</account>
<AccountList>
© 2009 Khoa CNTT - HKHTN
24
Thitk & Lp trình Web 2 – Bài 10: Web Services

VíVí
dd
33
––
XmlArrayItemXmlArrayItem
&&
ElementNameElementName
VíVí
dd
3

3

––
XmlArrayItemXmlArrayItem
&

&

ElementNameElementName
…
[return:XmlArrayItem(ElementName="savingsAcct", Type=typeof(SavingsAcct))]
[return:
XmlArrayItem(ElementName="creditCardAcct", Type=typeof(CreditCardAcct))]
[WebMethod]
public Acct[]
GetAllAccounts
() { … }
public

Acct[]

GetAllAccounts
()

{

…

}
AtLit
<
A
ccoun
tLi
s
t
>
…
<SavingAcct>
</SavingActt>
…
<CreditCardAcct>
</CreditCardActt>
…
/A tLi t
© 2009 Khoa CNTT - HKHTN
25
<
/A

ccoun
tLi
s
t
>
Thitk & Lp trình Web 2 – Bài 10: Web Services
VíVí
dd
44

XmlIncludeXmlInclude
VíVí
dd
4

4


XmlIncludeXmlInclude
public class Acct
{
[WebMethod]
{
public string Description;
public string Number;
p
ublic strin
g
T
yp

e
;
[XmlInclude(typeof(CreditCardAcct))]
[
XmlInclude(typeof(SavingsAcct))]
[return:
XmlArray("AccountList")]
[return:
XmlArrayItem
(
"
Account
"
)]
pgyp;
public decimal Balance;
public string Status;
}
bli l
Si At
At
[return:
XmlArrayItem
( Account )]
public Acct[] GetAllAccounts()
{
SavingsAcct a = new SavingsAcct();
CditCdAt
pu
bli

c c
l
ass
S
av
i
ngs
A
cc
t
:
A
cc
t
{
public decimal MinimumBalance;
}
C
re
ditC
ar
dA
cc
t
cc = new
CreditCardAcct();
// populate the accounts
A
cc
t

[]

sa
= n
e
w A
cc
t
[
2
];
}
public class CreditCardAcct : Acct
{
public int PayPeriod;
cc [] sa e cc [ ];
sa[0] = a;
sa[1] = cc;
return sa;
}
© 2009 Khoa CNTT - HKHTN
26
}
}
Thitk & Lp trình Web 2 – Bài 10: Web Services
TrinTrin
khaikhai
Web ServiceWeb Service
TrinTrin
khaikhai

Web

ServiceWeb

Service
 Public Website cho Web Service Application
Web Service Precomplied Directory
\bin directory and *.dll(s)
*
asmx
.
asmx
Web.config
Global.asax
 T

o Virtual Director
y
cho “Web Servicce Precom
p
lied Director
y
” nh
*.xml

y
p
y
trin khai mt ng dng Web
 Xem WSDL Document ca 1 web service

http://localhost/WebService/service asmx?wsdl
© 2009 Khoa CNTT - HKHTN
http://localhost/WebService/service
.
asmx?wsdl
27
Thitk & Lp trình Web 2 – Bài 10: Web Services
Web Service Consumer SideWeb Service Consumer Side
Web

Service

Consumer

SideWeb

Service

Consumer

Side
 LoiProject
–
ASP.NET Web Service
– ASP.NET Web Application
Wi d A li i
–
Wi
n
d

ow
A
pp
li
cat
i
on
– …
Web Service Consumer
 Gi Web Service
– S dng Proxy Class
Web Service Consumer
© 2009 Khoa CNTT - HKHTN
28
Thitk & Lp trình Web 2 – Bài 10: Web Services
Application ModelApplication Model
Application

ModelApplication

Model
Web Service
Developer
Developer
Web Application
Developer
Web Server 1
Service Provider App
asmx
.aspx

Web Server 2
Proxy Web Form
© 2009 Khoa CNTT - HKHTN
Service Consumer App
29
Thitk & Lp trình Web 2 – Bài 10: Web Services
Proxy classProxy class
Proxy

classProxy

class
 Lpgiaotipvi Web Service
 c phát sinh t WSDL document
 cs dng đ gi các phng thcca Web Service
© 2009 Khoa CNTT - HKHTN
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Thitk & Lp trình Web 2 – Bài 10: Web Services
Add Web ReferenceAdd Web Reference
Add

Web

ReferenceAdd

Web

Reference
© 2009 Khoa CNTT - HKHTN
31

Thitk & Lp trình Web 2 – Bài 10: Web Services
GiGi
thcthc
thithi
Web ServiceWeb Service
GiGi
thcthc
thithi
Web

ServiceWeb

Service
// Default.aspx.cs
WebService.Service service = new WebService.Service
();
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32
();
string str = service.HelloWorld();
Thitk & Lp trình Web 2 – Bài 10: Web Services
Web serviceWeb service
vàvà
State ManagementState Management
Web

service

Web

service

vàvà
State

ManagementState

Management
ASP NET Web service Application

Web Applicaton
1
ASP
.
NET

Web

service

Application


Web

Applicaton
1
Web service Application : Stateless
2
S dng đi tng Application và Session đ qun lý trng thái ca web

service
© 2009 Khoa CNTT - HKHTN
33
Thitk & Lp trình Web 2 – Bài 10: Web Services
TngTng
ktkt
TngTng
ktkt
 Web Services
 Kin trúc Web Services
– Web Service Provider
– Web Service Consumer
– Web Service Broker
 Web Service Standards
– SOAP
– WSDL
– UDDI
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 Lp trình Web Services bng VS.NET
34