HTTP

& her friends

New RCOS, who dis?

I'm ada

RCOS alum 2014-2018

I am the schedule

I work at Datto

(and we are hiring)

We're going to talk about...

HTTP!

Webservers

Making Requests

But not...

TCP/IP

Encryption

Streaming

This talk will be interactive!

Raise your hand(s) if...

You've worked on a 'web application'?

Are comfortable with web protocols?

Could craft an HTTP request 'by hand'?

Some History

HTTP was created by Sir Tim Berners-Lee in 1999

Alternatives/Competitors??

HTTP is the Web

And it's Free (as in THAT'S NOT FREE SOFTWARE! :0)

Requests

GET /meanest_mans HTTP/1.1
Host: http://apo.union.rpi.edu

Method

Resource

Headers

Requests

POST /meanest_mans/SIS_MAN_1 HTTP/1.1
Host: http://apo.union.rpi.edu
Content-Type: application/json; charset=utf-8
Content-Length: 119

{
  "ability": "Destroyer of Grades",
  "catch_phrase":
    "So I heard you like changing your password...",
  "age": 195
}

Method

Resource

Headers

Body

Methods

GET
POST
PUT
DELETE
PATCH
HEAD
OPTIONS
TRACE

Headers

Host
Authorization
Accept / Content-Type
Content-Length
Connection
Cookie / Set-Cookie
...

Lots of standard ones, but can be non-standard

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers

Response Codes

GET
200 OK
301 Moved
404 Not Found

POST
201 Created
400 Bad Request
409 Exists

Most useful ones

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers

PUT
200 OK
400 Bad Request


DELETE
404 Not Found
200 OK
202 Accepted

Time for an Activity!

You do not need a web browser to make requests...

netcat

cUrl

Postman

Writing straight to the dang socket

Time for an Activity!

nc -v rpi.yacs.io 4500

POST /meanest_mans/SIS_MAN HTTP/1.1
Host: localhost
Content-Type: text/plain; charset=utf-8
Content-Length: 45

So I heard you like changing your password...

curl -X POST -v https://rpi.yacs.io:4500/meanest_mans/SIS_MAN -d "
  So I heard you like changing your password...
"

Just kidding nothing is actually that simple

Designing for Complexity

A slightly more complex set of resources

Rules are simple, but following them isn't always

But you should try to do it anyway

REST

Client–server architecture

Statelessness

Cacheability

Layered system

Code on demand

Uniform interface

Resource identification in requests

Resource manipulation through representations

Self-descriptive messages

HATEOAS

Thanks

RCOS
The Coordinators & Faculty

Red Hat

Goldschmidt

Turner
Moorthy

Tim Berners-Lee

Alan Turing

Grace Hopper

My GF

My Mom