Wcf for the web developer

WCF for the web developer
Florin Cardașim, caf@rms.ro
twitter: @cardasim, @CodeCampIasi
RomSoft, www.rms.ro
Iași, 8th of May 2010

Agenda
WCF today: an overview
WCF Services for the WEB 2.0
SOAP & REST
WCF Data Services

WCF Today
Programming Model
SOAP Services
WEB HTTP
Services
Data Services
RIA Services
Workflow Services
Service Model
Data Contract
Service Contract
Service Behavior
Channel Model
Formats
(XML, JSON, Atom…)
Transports
(HTTP, TCP, IPC, MSMQ…)
Protocols
(SOAP, HTTP, Open Data Protocol,…)

WCF Architecture - Channels
WCF
Service
WCF
Client
Channel A
Channel A
Channel B
Channel B
Channel C
Channel C
Transport Channel
Transport Channel
HTTP, TCP, MSMQ, etc.

WCF Architecture - Bindings
WCF Service
[ServiceContract]
interface IExampleB
{ . . .}
[ServiceContract]
interface IExampleA
{ . . .}
Binding 3
Binding 1
Binding 2
Transactions
Transactions
RM
Security
Security
Transport HTTP
Transport HTTP
Transport TCP

Demo: WCF Services for the WEB 2.0

What is SOAP
SOAP = Simple(?!!) ObjectAccessProtocol
=protocol, =standards
advanced features: security, reliable messaging, transactions
transport neutrality (http, tcp, ipc, msmq …)
uses POST when used over HTTP
roots in enterprise applications

SOAP-HTTP bindings
wsHttpBinding
SOAP 1.2
Transaction Flow
Reliable Session
basicHttpBinding
SOAP 1.1
Symmetric Security
HTTP Transport (Text Message Encoding)
HTTP Transport (Text Message Encoding)

SOAP & WS-*
MEX
Policy
WSDL
SEC:
Kerberos, Username, X.509, SAML
Secure Conversation, Federation, Trust
RM:
Reliability, Reliable Messaging
TRAN:
BussinessAct,
Atomic,
Coordination
Messaging: SOAP, Addressing, MTOM, Transfer, Discovery…
XML: XML, XSD, Digital Signature, Encryption
Transport: HTTP/S, TCP, SMTP, UDP…

A SOAP request
WCF
Client
WCF
Service
POST /AccountAccess/Accounts.svc
Host: www.quickbank.com
SOAPAction: GetBalance
…
<soap:Envelopexmlns:soap= …
<soap:Body>
<GetBalancexmlns= …
<Account>2</Account>
</GetBalance>
</soap:Body>
</soap:Envelope>
Account 1
Account 2
Account 3

What is REST
REST = REpresentationalState Transfer
! protocol, ! format, ! standard
= architectural style
everything is a resource: Account, Balance …
address: www.quickbank.com/Accounts/2
uniform interface: HTTP GET, POST, PUT, DELETE
roots in WEB facing services (for example Google Search)

A REST request
WCF
Client
WCF
Service
GET www.quickbank.com/Accounts/2
Account 1
Account 2
Account 3

Demo: Twitter REST Service
Formats:
XML, JSON
RSS, ATOM
webHttpBinding
HTTP Transport (Web Message Encoding)

SOAP & REST

When to SOAP? When to REST?
Exposing data OR operations?
Need for WS-*?
Who will be using your service?
What are you/your developers comfortable with?
REST seems to be preferred in the clouds:
Amazon S3
Windows Azure
Google
…

OData: WCF Data Services
Open Data Protocol
REST-based protocol for CRUD-style operations
Based on AtomPub
Formats: Atom, Xml, JSON
DEMO

OData: Existing clients and servers
Clients
Browser
.NET 3.5, 4.0
Java Script
Java Restlet 2.0
PHP
ASP.NET AJAX
Excel 2010 Power Pivot
LINQPad
Servers
SQL Azure
SharePoint 2010
SQL Reporting Services
IBM WebSphere
Your WCF Data Service

Resources
Aaron Skonnard, www.pluralsight.com
David Chappel, www.davidchappel.com
http://wildermuth.com
Michele Bustamante, www.thatindigogirl.com
MSDN REST Starter Kit

Please fill the evaluation formThank you very much!
Florin Cardașim, caf@rms.ro
twitter: @cardasim, @CodeCampIasi
RomSoft, www.rms.ro
Iași, 8th of May 2010

Demo: REST in .NET 4.0
Caching
Automatic format selection
REST Starter Kit:
Client API
Paste as Xml

Wcf for the web developer

by CodeCamp/Iasi on May 11, 2010

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