Web Development for Managers

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W I L L K O M M E N F O R M A N A G E R S

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CALGARY

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WHO AM I? 25% writer of textbooks 25% computer education researcher 15% web developer 15% computer science and information systems 20% political science and philosophy

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2007 Addison-Wesley

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2014 Pearson

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2015 Pearson, Global Edition

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2017 Pearson, Second Edition

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Used at 120+ universities with about 3000 copies sold per year.

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S O W H AT D O M A N A G E R S N E E D TO K N O W A B O U T W E B D E V E L O P M E N T ?

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S O I S E A R C H E D …

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A N D F O U N D A L O T O F C L O U D S

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A N D D AT E D + I N A C C U R AT E D E S C R I P T I O N S

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IT’S NOT A FIRM FOUNDATION

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MY GOAL PROVIDE A KNOWLEDGEABLE FOUNDATION SO MANAGERS CAN MAKE INFORMED DECISIONS IN REGARDS TO WEB-BASED TECHNOLOGIES

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M Y P L A N N E D TO P I C S What is web development? Where is the Internet? How does the web work? Client-side development Web programming

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M Y T I M E - W I L L I N G TO P I C S Hosting and Virtualization Security and Search Miscellaneous Questions + Wild Cheering

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LET’S GET STARTED

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w h a t i s w e b D e v e l o p m e n t ?

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S o m e Te r m i n o l o g y R E Q U E S T - R E S P O N S E L O O P P E E R - TO - P E E R M O D E L

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S TAT I C W E B PA G E

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S I N G L E PA G E M U LT I P L E R E Q U E S T S

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D Y N A M I C S E RV E R - S I D E W E B PA G E

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D Y N A M I C W E B PA G E S TO D AY

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I N T E R N E T I N T R A N E T

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W E B D E V R O L E S A N D S K I L L S

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W E B D E V E L O P M E N T E M P L O Y M E N T W O R L D

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W h e r e i s t h e i n t e r n e t ?

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I t i s n o t i n a c l o u d !

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F R O M H O M E TO I S P

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I N T E R N E T E X C H A N G E P O I N T ( I X P )

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D ATA C E N T E R

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SERVER RACK Example

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S E RV E R FA R M

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WHY?

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Performance 16% 43% 56% 85% 89% Redundancy A typical single server can handle 1000-2000 requests/second. Even if site isn’t busy you still don’t want a single point of failure.

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does wo rk? How the web

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I P A D D R E S S E S

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D O M A I N N A M E S Y S T E M

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D O M A I N N A M E R E G I S T R AT I O N

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H T T P P R O TO C O L

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H T T P V E R B S

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This software responds to HTTP requests. Web server software is an essential component of web workflow

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S E RV E R S O F T WA R E M A R K E T

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S TA N D U P + S T R E T C H

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CSS HTML MEDIA

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CLIENT-SIDE DEVELOPMENT TECHNOLOGIES

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H T M L

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T I T L E O N E

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C S S

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C S S

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R E S P O N S I V E D E S I G N

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C S S G R I D S Y S T E M S

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W H Y G R I D S ?

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S T Y L E G U I D E S

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S E M A N T I C M I C R O F O R M AT S

Randy Connolly

Mount Royal University

Professor

…

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T E M P L AT E I N D U S T RY

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WEB MEDIA

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R A S T E R V E C TO R

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V I D E O F O R M AT S

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BUT programming technologies a r e needed f o r a ny rea l web s i te

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PHP JAVASCRIPT DATABASE

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WEB PROGRAMMING

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WHY?

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S C E N A R I O 1 F O R M P R O C E S S I N G

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S C E N A R I O 2 D ATA - D R I V E N C O N T E N T

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S C E N A R I O 3 I N T E R A C T I V I T Y

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C L I E N T - S I D E S C R I P T S E RV E R - S I D E S C R I P T

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S E RV E R - S I D E A C C E S S TO R E S O U R C E S

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D I F F E R E N T S E RV E R - S I D E T E C H N O L O G I E S S A M E R E S U LT S

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M A R K E T S H A R E

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I N T E R N E T I N T R A N E T

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D ATA B A S E S I N W E B D E V E L O P M E N T

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D ATA B A S E S I N W E B D E V E L O P M E N T

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S TA N D U P + S I N G ( O R YAW N )

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CHALLENGES WITH SERVER-SIDE

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F R O M T H E S E R V E R ’ S P E R S P E C T I V E T H E S E A P P E A R T H E S A M E W H AT T H E S E RV E R S E E S T H I S I S W H AT W E W A N T T H E S E R V E R T O S E E …

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HOW?

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THERE ARE ONLY TWO WAYS TO PASS INFO FROM CLIENT TO SERVER

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QUERY STRINGS COOKIES

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1 . PA S S I N G D ATA V I A Q U E RY S T R I N G

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U S I N G A U R L I N S T E A D WHY?

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S E O ( S E A R C H E N G I N E O P T I M I Z AT I O N )

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2 . PA S S I N G D ATA V I A C O O K I E S

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CLIENT-SIDE PROGRAMMING

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S C E N A R I O 3 I N T E R A C T I V I T Y

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C L I E N T - S I D E W I T H J AVA S C R I P T

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JAVASCRIPT JAVA

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C L I E N T - S I D E W I T H J AVA

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A S Y N C H R O N O U S R E Q U E S T S

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J AVA S C R I P T F R A M E W O R K S

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J AVA S C R I P T A N D E M P L O Y M E N T

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C O F F E E B R E A K

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DEPLOYMENT VIRTUALIZATION A N D

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D E D I C AT E D H O S T I N G Each site is on its own server(s)

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S I M P L E S H A R E D H O S T I N G

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V I RT U A L S H A R E D H O S T

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C L O U D H O S T I N G

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W h y C l o u d H o s t i n g ? R e d u n d a n c y 01 O n - D e m a n d P r o v i s i o n i n g 02 S c a l a b i l i t y 03 C o s t E f f i c i e n c y 04 L o w S t a r t u p C o s t s 05 M a n a g e r s S e e m t o L o v e C l o u d s … 06

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HOW?

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S E RV E R I N E F F I C I E N C I E S

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H O W I T W O R K S

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VA G R A N T A S T Y P E 2 H Y P E RV I S O R

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P R O V I S I O N I N G W I T H VA G R A N T

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M O R E E F F I C I E N C I E S W I T H C O N TA I N E R S

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C l o u d S e r v i c e M o d e l s C l o u d c o m p u t i n g p r o m i s e s s o m e t h i n g u s u a l l y r e f e r r e d t o a s e l a s t i c c a p a c i t y / c o m p u t i n g , m e a n i n g t h a t s e r v e r c a p a b i l i t y c a n s c a l e w i t h d e m a n d . Platform as a Service (PaaS) Infrastructure as a Service (IaaS) Software as a Service (SaaS) Amazon Web Services Microsoft Azure Google Cloud Platform

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Security and Search

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T H E P R O B L E M W I T H E V E

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U S I N G E N C RY P T I O N

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P R O B L E M : H O W T O T R A N S P O R T K E Y

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S I M P L E E N C RY P T I O N E X A M P L E

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H T T P S Q U I C K LY

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S E C U R I T Y T H R E AT S

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S Q L I N J E C T I O N AT TA C K

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C R O S S - S I T E S C R I P T I N G AT TA C K

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D E N I A L O F S E RV I C E AT TA C K

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R A I N B O W TA B L E AT TA C K ( C O N T E X T )

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R A I N B O W TA B L E AT TA C K ( S O L U T I O N ? )

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R A I N B O W TA B L E AT TA C K ( S O L U T I O N ! )

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How does search work?

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S E A R C H E N G I N E S

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W E B PA G E S A S V E C TO R S Math is then used to calculate the angle of similarity between search vector and page vector. The smallest angles indicate the closest matches.

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Miscellaneous To p i c s

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C O N T I N U O U S I N T E G R AT I O N

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To avoid problems with integrating software changes, many web developers have migrated to a continuous integration model that is dependent upon …

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V E R S I O N C O N T R O L

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A U TO M AT E D T E S T I N G

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W E B A D V E RT I S E M E N T S

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T H A N K Y O U R A N D Y C O N N O L LY h t t p : / / w w w. r a n d y c o n n o l l y. c o m