Internet2 Tech Exchange 2015 – RESTful APIs and Resource Definitions for Higher Ed

Keith Hazelton – UWisc

TIER work growing out of CIFER – Not just RESTful APIs. The goal is to make identity infrastructure developer and integrator friendly.

Considering use of RAML API designer and tools for API design and documentation.

Data structures – the win is to get a canonical representation that can be shared across vertical silos. Looking at messaging approaches. Want to make sure that messaging and API approaches are using the same representations. Looking at JSON space.

DSAWG – the TiER Data Structures and APIs Working Group – just forming, not yet officially launched. Will be openly announced.

Ben Oshrin, Spherical Cow

CIFER APIs – Quite a few proposed, some more mature than others.

More Mature: (Core schema – attributes that show up across multiple APIs); ID Match (creates a representation for asking “do I know this person already, and do I have an identifier?”); SOR to Registry (create a new role for a person); Authorization (standard ways of representing authorization queries).

Less mature: Registry extraction (way to pull or push data from registry – overlap with provisioning); Credential management (do we really need to have multiple password reset apps?)’

Not even itemized: Management APIs; Monitoring APIs. Have come up in TIER discussions.

Non CIFER  APIs / Protocols of interest: CAS, LDAP, OAuth, OIDC, ORCID, SAML2, SCIM, VOOT2

Use cases:

  • Intra-component: e.g. person registry queries group registry for authorization; group registry receives person subject records from person registry.
  • Enterprise to component: System or Record provisions student or employee data in Person Registry
  • Enterprise APIs: Homw grown person registry exposes person data to campus apps.


API Docs; Implementations

Where 2.0 Online – Alasdair Allan

I’m participating in O’Reilly’s Where 2.0 Online conference – fall 2009 – the topic is An emphasis on iPhone sensors.

First up is Alasdair Allan – – author of a book on iphone programming. The sensors in your iphone.

GPS (core location) – abstraction layer in front of different methods. Abstracts cell towers (12km falling to 1-3km), Skyhook wireless (approx 100m), GPS (approx. 40m). Have to check if location services are enabled first. iPhone simulator will always report location of 1 Infinite Loop in Cupertino.

Distance filter – can set to update based on distance of a change, so you don’t get so many update messages.

Can set desired accuracy using locationManager.desiredAccuracy

Delegate methods:locationManager gets messages when location changes – new location and old location.

Accelerometer – measures linear acceleration of device – roll and pitch, not yaw (except iphone 3gs if you combine with magnetometer) x=roll, y=pitch. 1.0 = approx 1 gravity. z=front side up or front-side down. 0.0=edge-on to the ground.

Declare view controller class UIAccelerometer instance. Start the accelerometer. Can set update frequency (e.g. .1 sec) – can calculate orientation from that in radians.

Magnetometer (digital compass). Combining heading info (yaw) with roll and pitch, can determine orientation in real time. Only 3gs has this, so important to check whether heading info is available in core loocation with locationManager.headingAvailable.

Magnetometer is not amazingly sensitive – 5 degrees is good for most purposes. Check to see that new heading is >0. Returns magnetic heading, not true. If location services are enabled, then you can also get true heading.

Heavily affected by local magnetic fields.

Camera – you can have the user take a picture and grab it.

Proximity Sensors – turns device’s screen on and off when you make a call – infrared led near earpiece that measures reflection. UIDevice object. Sensor has about a 3.5 cm range.

phonegap is an open source framework for building web apps that become native apps on iPhone and android.

Alasdair recommends the iSumulate app from to be able to simulate acceleromater events in the iPhone SDK –

Run static analyzer (in xcode in snow leopard) to check your code before shipping to Apple – because they will.

Dev Days – Cody Lindley on jQuery

Cody Lindley (Ning)

coauthor of JQuery Cookbook, due out next month
Authored a pdf book of examples called JQuery Enlightenment

jQuery – Intro for Developers

Who uses JQuery?

35% of all web pages running Javascript are running jQuery. 1 out of all 5 sites.

What is JQuery?

– A Javascript library
– helps ealing with the DOM
– Simplifies DOM events and animations

JS Bin – a very cool tool that allows testing of Javascript and HTML.

Shows an example of coloring every odd row of every table on a web page in one line of JS code. Adds roll-over coloring with a couple of more lines.

Why use JQuery?

Helps simplify and speed up web development
Allows us to avoid common headaches associated with browser development
Provides a large pool of plugins.
Large and active community
Tested on 50 browsers on 11 platforms
It’s for both coders and designers

Where to get jQuery?

Download source from google code (moving to github soon)
Use a CDN

Concept 1: Find something, do something.
– use the jQuery function to find an element in a page, and then do something to it.

Concept 2: Create something, do something.
– You can create elements in the DOM.

Concept 3: Chaining
Can use a single jQuery wrapper set and statement to execute a sequence of methods.

Concept 4: Implicit Iteration
E.g. when we call add class it loops over every element contained in the wrapper set.

Concept 5: jQuery() parameters
First parameter – can be passed CSS selectors, HTML, DOM elements, or a function shortcut.
Second parameter – can pass CSS selectors or DOM elements. Tells the engine the context in which you want to search. Default is the document or body element. Important for optimizing JS to narrow search.

Overview of jQuery API
– Core
– Selectors – see
– Attributes
– Traversing – can manipulate text nodes with the content method.
– Manipulation
– Events
– Effects
– Ajax
– Utilities

Put your Javascript code at the bottom of the page to speed up when it executes.

Shows an example of creating a jQuery plugin in 6 steps.

Dev Days – Scott Hanselman on MVC

Scott Hanselman – ASP.NET MVC

Visual Studio 2010 Beta 2

ASP.NET MVC does not dictate which database is used for Models, so new projects open with an empty Models folder.

URL structure is a user interface. ASP.NET MVC sets up predictable urls by default – a structured convention.

MVC built on top of web forms ASP.NET > MVC > Web Forms. MVC programmers can use all the existing stuff, but there’s like a new vehicle – webforms is like a minivan, but MVC is like a motorcycle – you could kill yourself, but you can go a lot faster.

Pluggable view engines.

Shows haml – which uses indentation and significant white space to make code cleaner.

Now shipping jquery in ASP.NET and MVC – MS contributing to the open source project.

By default C# code is compiled but views are not.