Bringing Web Services to IoTivity

Transcription

Bringing Web Services to IoTivity
Opportunities, Challenges & Approaches
Sanjeev BA
Open Source Group
Samsung Electronics
Background
Vertical Domains (Health, Manufacturing, Education, Consumer)
Consumer Services
Enterprise Services
REST API
SOAP based
JSON
XML
Cloud Solutions
Opportunities
IoT & The App Conundrum
Developers looking for niche areas
Direct revenues from apps slowing down
52% make < $1000 / month
53% working on IoT related apps already.
Estimated 5.5 Million mobile app devs.
Smart Home and Wearables
Users already have app fatigue
* Source : VisionMobile™ Developer Economics Q1 2015: State of the Developer Nation
Critical
Contextual
User Context
Location + Time
Healthcare
Service
Consumer Centric
Smart Home +
Retail
Services in the IoT Context
Critical
• Legacy system integration
• Regulatory
Contextual
• Sensor + service integration
Enriched Consumer Experience
• Smart Shopping Cart
• Tap device to order
Challenges
SDK Overload for Developers
App Developers
( Ex. Streaming Music)
IoT SDK
Platform SDK
Web Service SDK
Iotivity SDK
Developer.
Tizen.org
developers.facebook
.com
AllJoyn SDK
Developer.
android.com
dev.twitter.com
MQTT SDK
Developer.
apple.com
developer.paypal.
com
Siloed Ecosystems
THING MAKERS ARE LOOKING TO DIFFERENTIATE
WITH THE HELP OF WEB SERVICES
Store 1
Store 2
Store 3
App Overload For Users
Smart
Things
Flipkart
User
Twitter
Sphero
Sonos
Path
Skype
Hue
!=
Service
Integrator
Current Approaches
Dedicated Hub + Cloud Service Model
IoT Network
Cloud
Service
App
Service Plugin Model
Package
Download
Server
Web Service Plugin
Web Service Profile
Cloud
Service
App
IoT Network
Distributed App Control Model
IoT Network
Distributed App Control
App
Service
Integrator
Backend
App
App
Web Service Interface
Web Service Interface (WSI)
Enabler of interactions
IoTivity applications & Web Services
Web service abstraction
Service Access
Auth Handling
Device
IoTivity
App
Device
IoTivity
IoTivity
Web
Service
Interface
RESTful
Services
Web
Services
SOAP Base
Services
Key Concepts
Roles
Web Service Provider
WSI
IoT Device Manufacturer
IoT App Developer
Users
 Service Description
 Services
 Capabilities
 Authentication and Authorization
Roles
Web Service
Provider
Application
Developer
Users
Device
Manufacturers
Service Description
What is service description
 A way to represent web services to WSI
 Service Block (JSON)




Metadata
Authorization
Capability List
TAGS
Service
Description
WSI
Service Block Example
META DATA
"name":“Openweathermap",
"id":“org.openweathermap",
"description":“A service that has weather for more than 200,000 cities",
“logo" : "http://openweathermap.org/images/OWM_logo32_32.png"
CAPABILITY LIST
TAGS
capabilities:[
{Capability1: },
{Capability2: },
…
{CapabilityN: }
]
"tags":[
"search",
“weather”
]
Capability
What is a capability
 Represents different API offered by the Service
 Capability Block (JSON)




Metadata block
Headers
Responses
TAGS
Post Tweet
Now Trending
Timeline
Status
Service
Description
WSI
Capability Example
CAPABILITY DESCRIPTION
capability:[
{
id
: org.openweathermap.findbycity,
isauthrequired : true,
endpoint
: api.openweathermap.org/data/2.5/weather
endpointtype : REST,
operation
: GET,
params
:{
q
: {{cityname}}
},
headers
:{
x-custom
: {{cityname}}
},
response
:{
<response JSON body format>
}
Authorization Example
auth:{
type
subtype
appcredentials: {
cust_key
cust_sec
oauth_key
oauth_sec
}
}
:oauth2.0,
:application-only,
:{{cust_key}}
:{{cust_secret}}
:{{oauth_key}}
:{{oauth_secret}}
Applying Service Description
- A Use Case
Use Case #1: Web Service + IoT Device
Web
Service
WSI
IoT
Device
IoT App
Alarm Event
Thin Device
Weather
Service
IoT
Alarm
App
Brew my
coffee based
on weather
Use Case #1
Open
WeatherMap
Service Description
(Offline / Download)
WSI
Smart Alarm App
(w/ IoTivity)
IoTivity
Coffee Maker
WSI_Connect()
obServeResource()
Initialization
onObserve()
WSI_Capability_Request
(“Weather”, “Time”, “Location”)
RESTful endpoint
Find List of
Providers : Tag = Weather
JSON Response
Result From
Service Description
Smart Phone with WSI
App Logic
Hot Cappuccino
Use Case #1 : Adding Service Provider
Accuweather
Service Description
(Offline / Download)
WSI
Smart Alarm App
(w/ IoTivity)
IoTivity
Coffee Maker
WSI_Connect()
obServeResource()
Initialization
onObserve()
WSI_Capability_Request
(“Weather”, “Time”, “Location”)
RESTful endpoint
Find List of
Providers : Tag = Weather
JSON Response
Result from
Service Description
App Logic
Hot Cappuccino
Use Case #2 : Share with friends
Coffee recipe
Sharing
Service
IoT
Alarm
App
Thin Device
Use Case #2 : Tweet The Recipe
Twitter
IoT Alarm App
WSI
Check
Service Description
& local cache
Twitter Auth Flow
Cust Key + Secret
{MSG}
IoTivity
Coffee Maker
Configuration Phase
User Auth
If required
Update
AuthCache
Hot Cappuccino
With Cream Recipe
Post Recipe to Twitter
“Share” To Twitter
Report Status
Putting it all together
Web Services Interface
WSI Configuration App
WSI API Interface
Web Services
Manager
WSI
Daemon /
Service
Service Handler
Platform
Adaptation
Linux
Android
Web
Auth
Manager
Config
& Caching
Tizen
Web Service Interface Daemon
Web Services Manager
Parses the service description
Provides representation of the description
Service Handler
Invokes requested API
Processes the response
Uses Auth Manager to delegate Auth flows.
Uses platform HTTP stack
Auth Manager
Performs Auth related flows
Manages application specific auth cache.
Token Refresh Handling
Config & Caching
WSI API Interface
• Provides a simple set of API to discover and utilize services
 API overview
 WSI_Connect() Connect to the WSI Daemon / Service Application
 List<Service> WSI_Get_Services(“User Action Tag”)
 List<Capability> WSI_Get_Capabilities(Service)
 Request_Handle WSI_Capability_Request(Capability, Callback)
 Callback(Request_Handle, Capability_Result)
Configuration App
Provides frontend for users to configure web
services.
Enabling and disabling individual capabilities
Helps with Auth flows involving a browser.
Deployment View : Linux, Tizen
Web
Service
WSI Config
App
WSI C++
Library
IoTivity Application
WSI C++
Library
IoTivity SDK
(C++)
Service
Description
Send Tweet
Get
Sentiment
WebService
Manager
Auth Cache
WSI
DBus
Or
Service App
IoTivity
Network
Deployment View : Android
Web
Service
WSI Config
App
WSI Android
Library
IoTivity Application
WSI Android
Library
IoTivity SDK
(Android)
Service
Description
Send Tweet
Get Sentiment
WebService
Manager
WSI
Android
Service
Auth Cache
IoTivity
Network
Challenges Addressed By WSI
SDK Overload ?
App Overload ?
App Developers
( Ex. Streaming Music)
I
o
T
S
D
K
P
l
a
t
f
o
r
m
S
D
K
W eb Service
SDK
I ot ivity
SDK
Developer.
Tizen.org
developers .f
acebook.co
m
AllJoy
n SDK
Developer.
android.co
m
dev.t w itter.
com
M QTT
SDK
Developer.
apple.com
developer.p
aypal.
com
Siloed Ecosystems ?
Store 2
F
l
i
p
k
a
r
t
T
w
i
t
t
e
r
S
p
h
e
r
o
S
o
n
o
s
P
a
t
h
S
k
y
p
e
H
u
e
No
Partial
Store 1
S
m
a
r
t
T
h
i
n
g
s
Store 3
Enable Web Services
Integration?
H
e
a
l
t
h
c
a
r
e
S
e
r
v
i
c
e
U s er
Cont ext
Locat ion +
Time
Smart Home
+
Ret ail
OIC & IoTivity
Yes
Development Plan & Status
Phase 1 (Oct ‘15)




Schema definitions for popular services
Schema Parsing, Data models
Demo Web Service Use Cases
Linux, Android and Tizen support
Phase 2 (Nov ‘15)
Schema improvement (new features)
Multiuser support
Demo
Q&A
License Attribution For Images
•
“simpleicon social media” is an icon pack by SimpleIcon under License: CC BY 3.
•
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is licensed by <a href="http://creativecommons.org/licenses/by/3.0/" title="Creative Commons BY 3.0">CC BY 3.0</a></div>
<div>Icons made by <a href="http://www.flaticon.com/authors/rami-mcmin" title="Rami McMin">Rami McMin</a> from <a href="http://www.flaticon.com"
title="Flaticon">www.flaticon.com</a>
<div>Icons made by <a href="http://www.flaticon.com/authors/situ-herrera" title="Situ Herrera">Situ Herrera</a> from <a href="http://www.flaticon.com"
<div>Icons made by <a href="http://www.flaticon.com/authors/anton-saputro" title="Anton Saputro">Anton Saputro</a> from <a href="http://www.flaticon.com"
<div>Icons made by <a href="http://www.flaticon.com/authors/freepik" title="Freepik">Freepik</a> from <a href="http://ww.flaticon.com" title="Flaticon">www.flaticon.com</a>
•
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•
•
•
•
•
•
•
•
•
•
Role : IoT Device Manufacturer
Function
 Makers of ‘Things’
 Spec Compliance
Expectations
 Increased user adoption
 Feature Differentiation
Roles : App Developers / Integrators
Function
 New breed of “apps”
 {Web services & IoT devices} Apps
 IFTTT, Uber, Makerspace
Expectations
 Maximize Asset Reuse
 Simpler development
 “What to” not “How to”
 New revenue streams
 Monetization opportunity
Users
Function
 Consume web service & IoT Devices
 Provide required credentials
 Authorizing apps to use web services
Expectations
 Zero/Minimal Setup overhead
 Retain existing workflow
 Enable new use cases.
Role : Web Service Provider
Function
 Hosts the web service
 Maps, Photos, Music Streaming
 Provides access via API and Apps.
Expectations
 Extending service into the IoTivity network
 Minimal/No changes in existing workflows
 More user engagement from multiple
sources
Use Case #1 : Auth Flow
OpenWeatherMap
IoT Alarm App
WSI
Register to get APPID/APIKEY : 833e2f1ded3644f180c6d724fekjsdfsdkj
Service Description
http://api.openweathermap.org/data/2.5/forecast/city
Params
Response JSON
{
id={Location}
city : {name},
APPID={APIKEY}
LIST : {
date : {d},
temp : {t},
unit : {units},
humidity : {h},
Get_Capability(“Weather”)
List of “Weather” Services
Params : {Location}, {APIKey}
Response :
{name}, list <{date}, {temp}>
Get Weather
Cache
APIKEY
http://api.openweathermap.org/data/2.5/forecast/city
Params
id=443742
APPID=833e2f1ded3644f180c6d724fekjsdfsdkj
Location ID : 443742
APIKey : 833e2f1ded3644f180c6d724fekjsdfsdkj
Callback
{name}, list <{date}, {temp}>
Use Case #2 : Auth Flow
Twitter
IoT Alarm
App
WSI
Client Key + Secret
Service Description
REQUEST TOKEN
POST https://api.twitter.com/1.1/statuses/update.json
Cust Key + Secret
POST /oauth/request_token
Req token and secret
auth:{ … }
Params status={msg}
Header Authorization: {Oauth}
Authenticate User + Authorize App
Authorize App
Req Token + Verifier
ACCESS TOKEN
https://api.twitter.com/1.1/statuses/update.json
Oauth Token + Secret
auth:{ … }
Params status={msg}
Post {msg} to twitter
STATUS
POST https://api.twitter.com/1.1/statuses/update.json
auth:{ … }
Params status={msg}
Post {msg} to twitter
Twitter
User

Bringing Web Services to IoTivity

Transcription

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