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Pengantar Teknologi Web 2 Web Architectures & Technologies Antonius Rachmat C.

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Presentation on theme: "Pengantar Teknologi Web 2 Web Architectures & Technologies Antonius Rachmat C."— Presentation transcript:

1 Pengantar Teknologi Web 2 Web Architectures & Technologies Antonius Rachmat C

2 WWW Software Kumpulan service Internet, yaitu web-web yang berada di layer aplikasi Ditemukan oleh Tim Berners-Lee dkk di CERN Didesain untuk membantu para ilmuwan di CERN untuk memperoleh informasi dari dokumen-dokumen di Internet Tujuannya: membuat software (browser) untuk menampilkan informasi tersebut –Idenya: hyperlink

3 WWW The world wide web consortium (W3C) definition of the web: "The World Wide Web is the universe of network- accessible information, an embodiment of human knowledge" Provides information access in ways not previously possible –Hyperlinked (Hypertext) –Graphical user interface –Pictorial and non-text information –Information that changes rapidly –Immediate access –Anyone can author a web site –Multi-user access to the same information (try that with a book) –Easily searchable information

4 WWW Components Structural Components –Clients/browsers – to dominant implementations –Servers – run on sophisticated hardware –Caches – many interesting implementations –Internet – the global infrastructure which facilitates data transfer Semantic Components –Hyper Text Transfer Protocol (HTTP) –Hyper Text Markup Language (HTML) eXtensible Markup Language (XML) –Uniform Resource Identifiers (URIs)

5 Web Server survey (netcraft)

6 Growth of World Wide Web

7 A brief history of the web Dynamic content Server-side scripting Static content cgi-bin, php,, asp Database-backed content Componentized/ enterprise applications Web application frameworks EAI Better script/database integration

8 Web Architecture Layering Aspect –“Separation of concerns” –How many concurrent users are you serving? –Shared needs among multiple applications? (e.g., security) Data Aspect –What kind(s) of data are you delivering? Structured vs non structured On-demand vs. real-time –What are the bandwidth requirements? Size & nature of data Again, audience concerns

9 Tiers…? A “tier” can be hardware, software, or logical. The last is the most sensible option from an architectural viewpoint. Therefore: –A non-application-specific client (such as a web browser) is not a tier –A database with no overlying data access layer is not really considered a tier either

10 N-tier web architectures Client Presentation Business Logic Data Access Data HTML rendering Templates, HTML generation scripts, XML and XSLT Application-specific components and application logic Domain-specific and database-independent layer, typically object-oriented Data storage, typically an (SQL) RDBMS

11 How to build a 2-tier web app… Browser MySQL Your code to generate HTML, process forms, generate SQL queries on database (1 or 2 tiers) Any old browser (you don’t care) Apache PHP Application Open-source: free, fast, and dependable Linux, Solaris, etc LAMP: Linux, Apache, MySQL, PHP. US$10+/month from …the easy way…

12 How to build a 3-tier web app… Browser Database Your object-oriented php / code, structured into three tiers Any current browser Apache Custom C++ module Open-source: free, fast, and dependable Linux, Solaris, etc Typically database choice will be decided by factors other than just suitability for web use. Presentation Application Logic Data Access …the traditional way…?

13 Physical architecture Application server Compute server #1 Compute server #N Secure customer cluster #1 Gateway Firewall Browsers Administrative terminals ssh https Secure customer cluster #N Firewall: Port 443 (https) from anywhere Port 23 (ssh) from admin domain only

14 Conceptual architecture Encryption & Tunneling Browser ActiveX Thin Client Decryption & Routing TC srv App Mgt UNIX apps App srv HTTPS Tunneling MySQL

15 the three roles the Model contains data that represents the problem the Controller responds to user actions by telling the Model how to change the View displays the current state of the Model to the user

16 how do we design it? the Model is a class that represents the actual problem being solved –it has private fields, and provides accessor (getter and setter) methods –the Model should always be a separate class if using a GUI –the listeners collectively are the Controller –the displayed components are the View –the Controller and View are thus a little bit interdependent

17 Combining Controller and View Sometimes the Controller and View are combined, especially in small programs Combining the Controller and View is appropriate if they are very interdependent The Model should always be independent Never mix Model code with GUI code! –why? ANSWER: you may be required to change the View if you keep View and Model separate, changing the View will be relatively simple

18 MVC

19 Contoh

20 MVC Separation Separating the presentation from the model –Presentasi dan model memiliki fokus yang berbeda: presentasi ke tampilan, model ke data. –Perbedaan ketergantungan: presentasi bergantung pada model tapi tidak sebaliknya. –Sehingga dapat mengembangkan multiple presentation dengan model yang sama Separating the controller from the view –Contoh:.NET Web application –File: *.aspx dan *.aspx.vb Contoh: PHP Zend Framework, Code Igniter

21 Kelebihan & Kekurangan Aplikasi Web

22 Teknologi Aplikasi Web

23 Bagaimana web bekerja?

24 Web application

25 Planning A Web site Purpose –Purpose and Goal –Target Audience –New Web Technologies –Web site comparison Content –Value-added contents –Text –Images –Color Palette –Multimedia


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