WebFund 2015W Lecture 23 - Revision history

LeeCroft at 16:09, 7 April 2015

2015-04-07T16:09:06Z

@@ Line 5: / Line 5: @@
 ==Notes==
 Two topics for last two lectures:
@@ Line 10: / Line 11: @@
 * Web applications everywhere
-===Distributed Applications===
+====Distributed Applications====
 Applications that run on multiple computers
@@ Line 25: / Line 26: @@
 * with distributed applications, you don't control all the computers "your" code runs on
-===Structured Persistence===
+====Structured Persistence====
 Before this class, you worked with files
@@ Line 39: / Line 40: @@
 * concurrency & distribution
-===Front vs Back end===
+====Front vs Back end====
 * separate parts of app for...
@@ Line 58: / Line 59: @@
 * but main reason is latency (of network communication)
-===Markup and Templates===
+====Markup and Templates====
 HTML, CSS: markup
@@ Line 67: / Line 68: @@
 template languages output markup (are meta-markup)
-===Trust===
+====Trust====
 Who do you trust?
@@ Line 79: / Line 80: @@
 Amazing the web works at all

Soma at 18:01, 4 April 2015

2015-04-04T18:01:18Z

← Older revision		Revision as of 18:01, 4 April 2015
Line 1:		Line 1:
			==Audio==

			The audio from the lecture given on April 1, 2015 [http://homeostasis.scs.carleton.ca/~soma/webfund-2015w/lectures/comp2406-2015w-lec23-01Apr2015.m4a is now available].

	==Notes==		==Notes==

Soma: /* Markup and Templates */

2015-04-01T15:22:52Z

Markup and Templates

← Older revision		Revision as of 15:22, 1 April 2015
Line 55:		Line 55:

	===Markup and Templates===		===Markup and Templates===

			HTML, CSS: markup
			Jade: template language

			Markup is constraint or declarative programming

			template languages output markup (are meta-markup)

	===Trust===		===Trust===

Soma: /* Structured Persistence */

2015-04-01T15:14:57Z

Structured Persistence

← Older revision		Revision as of 15:14, 1 April 2015
Line 22:		Line 22:

	===Structured Persistence===		===Structured Persistence===

			Before this class, you worked with files

			Files are unstructured (on modern systems)

			On the web we use "databases"
			* really, structured storage

			Why structured?
			* convenience
			* speed for "complex" queries
			* concurrency & distribution

	===Front vs Back end===		===Front vs Back end===

Soma: /* Front vs Back end */

2015-04-01T15:03:08Z

Front vs Back end

← Older revision		Revision as of 15:03, 1 April 2015
Line 24:		Line 24:

	===Front vs Back end===		===Front vs Back end===

			* separate parts of app for...
			** doing computation/storage/real work (back end)
			** providing the interface (front end)

			Can you do "real work" in the front end?
			* Yes, but...
			* Don't trust the answers

			Front end is untrusted, back end is trusted

			Modern web apps have many backends and can have multiple front ends (mobile, desktop)
			* but "responsive design" says you should have one front end

			So why put stuff in the front end?
			* lower the load on the back end
			* but main reason is latency (of network communication)

	===Markup and Templates===		===Markup and Templates===

Soma: /* Trust */

2015-04-01T14:56:29Z

Trust

← Older revision		Revision as of 14:56, 1 April 2015
Line 28:		Line 28:

	===Trust===		===Trust===

			Who do you trust?
			* library, runtime authors
			* content providers
			* ad providers
			* whatever else you add to a page

			Trust means "who can screw you over"
			* if they go bad how badly are you hurt

			Amazing the web works at all

Soma: /* Distributed Applications */

2015-04-01T14:52:18Z

Distributed Applications

← Older revision		Revision as of 14:52, 1 April 2015
Line 7:		Line 7:

	===Distributed Applications===		===Distributed Applications===

			Applications that run on multiple computers
			* separate memory, CPU, storage, communication (I/O)
			* can apply this processes, virtual hosts, or physical hosts

			Localhost is useful when you want a distributed app on one computer

			* GET and POST can go essentially anywhere on the Internet
			* allows for flexible combination of code and data

			* web applications are the premier form of distributed applications today

			* with distributed applications, you don't control all the computers "your" code runs on

	===Structured Persistence===		===Structured Persistence===

Soma: Created page with "==Notes== Two topics for last two lectures: * What are the fundamentals of web applications? * Web applications everywhere ===Distributed Applications=== ===Structured Per..."

2015-04-01T14:20:40Z

Created page with "==Notes== Two topics for last two lectures: * What are the fundamentals of web applications? * Web applications everywhere ===Distributed Applications=== ===Structured Per..."

New page

==Notes==

Two topics for last two lectures:

* What are the fundamentals of web applications?
* Web applications everywhere

===Distributed Applications===

===Structured Persistence===

===Front vs Back end===

===Markup and Templates===

===Trust===