This document discusses web service architectures and the SOAP protocol. It provides an introduction to SOAP, explaining that it stands for Simple Object Access Protocol and is used for communication between applications via XML and HTTP. It describes SOAP's building blocks such as the envelope, header, body, and fault elements. The document also discusses NSURLConnection and NSXMLParser for handling web requests and parsing XML responses in iOS.

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iPhone Training
Lesson 5

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Contents
1 Web Service Architectures
2 SOAP Introduction
3 NSURLConnection
4 NSXMLParser
5 Example 5
6 Exercise 5
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Web services Architecture
SOAP Protocol
Database SOAP Services
XML
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SOAP Introduction
 What is SOAP?
 SOAP stands for Simple Object Access Protocol
 SOAP is a communication protocol
 SOAP is for communication between applications
 SOAP is a format for sending messages
 SOAP communicates via Internet
 SOAP is platform independent
 SOAP is language independent
 SOAP is based on XML
 SOAP is simple and extensible
 SOAP allows you to get around firewalls
 SOAP is a W3C recommendation
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SOAP Introduction
 Why SOAP?
 It is important for application development to allow Internet
communication between programs.
 HTTP is supported by all Internet browsers and servers.
 SOAP provides a way to communicate between applications
running on different operating systems, with different
technologies and programming languages.
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SOAP Introduction
 SOAP Building Blocks
 An Envelope element that identifies the XML document as a
SOAP message.
 A Header element that contains header information.
 A Body element that contains call and response information.
 A Fault element containing errors and status information.
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SOAP Introduction
SOAP Request
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SOAP Introduction
SOAP Response
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NSURLConnection
Request
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NSURLConnection
Delegate
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NSXMLParser
Delegate
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NSXMLParser
XML
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NSXMLParser
XML
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Example 5
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Exercise 5
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