1. COMP9321 Web Application Engineering Semester 2, 2017
Dr. Amin Beheshti
Service Oriented Computing Group, CSE, UNSW Australia
Week 1
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2. Background Variable? 2 Application M.A. Label Value DataTypeX
Label
Value
Int
DataType
Variable?
Set of Related Programs
Set of Related Functions
Set of Related Statements
Assignment
Selection
Iteration
Jump … X 2
COMP9321, 17s2, Week 1

3. Background Data Structures? Application Set of Related Programs
Set of Related Functions
Variable
Array
Record
linked list
Tree
Graph
...
ADT
Set of Related Statements
Assignment
Selection
Iteration
Jump …
Abstraction
COMP9321, 17s2, Week 1

4. Background Application Platform Independent Application
Computing Platform
Execute on …
Hardware
Software
Hardware
Software …
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5. Background … Application Platform Independent Application
(e.g. Web Applications)
Binary …
File
Tim Berners-Lee …
Text
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6. Background Application Platform Independent Application
(e.g. Web Applications)
Keyword Extraction
Program
input
output
Web Services
Keyword Extraction
World Wide Web
Request
Response
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7. Background Application GUI, Command line, … Presentation Program
Architecture
Program
Data Structures
File
DBMS (Relational and NoSQL)
GUI, Command line, …
Presentation
Logic
3-Tier Architecture
Data
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8. The importance of Web Application Architecture2
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9. 3-Tier Architecture
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10. n-Tier applications
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11. 3-tier Architecture: Client/Server Difference
Client Side
Server Side
Thin Client
Fat Client
Ref: Tanenbaum & Van Steen. "Distributed systems-principles and paradigms", 2007
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12. Web Application Architecture: Client/Server Difference
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13. Web Application Architecture: Client/Server Difference
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14. Web Application Architecture: Layers
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15. Learning Outcomes
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16. What we WILL teach you
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17. What we WILL NOT teach you
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18. Rough Schedule
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19. Course Outline
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20. Exam Format (draft)
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21. Exam Format (draft)
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22. Support Staff
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23. COMP9321 Supp Exam Policy
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24. Other notes
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25. Course Assessment Statistics
Average:
Students #: 100
HD: 10%
DN: 30%
CR: 40%
PS: 10%
FL: 10%
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26. Some Updates from s1-2018 COMP9321: Data Services Programming
This course aims to introduce the student to core concepts and practical skills for engineering the data in service-oriented data-driven applications.
COMP9322: Software Service Design Engineering
This course arms students with the knowledge and expertise to “design” and “engineer” services using modern Web technology.
COMP9323: SaaS Project
This course aims to practice what you have learned in COMP9321 and COMP9322 courses by getting involved in implementing real-world projects.
COMP6324: Internet of Things Service Design and Engineering
This course focuses on the engineering and management aspects of IoT Services, providing complementary skills and knowledge to what is offered by existing courses.
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27. Web Application Engineering
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28. What are we aiming for..
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29. Basic Web Architecture: Universal Readership ...
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30. Web Essentials - Clients, Servers and Communication
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31. Web Essentials - Clients, Servers and Communication
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32. Web Essentials - Basic Internet Protocols: TCP/IP
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33. Web Essentials - Basic Internet Protocols: TCP/IP
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34. Web Essentials - Basic Internet Protocols: TCP/IP
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35. Web Essentials - Basic Internet Protocols: Domain Names
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36. Web Essentials - Higher-Level Protocols
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37. Building Blocks of the Web (Shklar and Rosen, pg. 31)
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38. Web Essentials - URL
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39. An http-scheme URL
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40. Web Essentials - HTTP
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41. Web Essentials - HTTP
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42. Web Essentials - HTTP
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43. On Request Header Fields
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44. HTTP Request Methods (version 1.1)
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45. HTTP/1.1 Status Code Classes and common codes
p.19 in (WebTech)
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46. Web Essentials - HTTP
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47. Example (reproduced from: page 18, Head First Servlets & JSP, Basham, et. al., O'Reilly,)
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48. Improving Performance using HTTP features
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49. The Trouble with HTTP
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50. Moving Web Site to Web Applications
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51. Common Gateway Interface (CGI)
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52. CGI is replaced by other 'better' technologies
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53. Web Essential - Web servers
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54. Web Essential - Web servers
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55. References
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56. COMP9321, 17s2, Week 1