1. YQL Case Study
Allan Huang @ esobi Inc.

2. Agenda
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YQL
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
PlaceFinder API
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
Case Study - Stock Quote
Case Study - City WOEID
Flickr API
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


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Case Study - City WOEID
Case Study - City Photo
Case Study - Area Photo
Case Study - Photo Information
Case Study - Photo EXIF

3. Continued Agenda
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Instagram API
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
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Case Study - Area Photo
Case Study - Popular Photo
Case Study - Recent Tagged Photo
Case Study - Location Search

4. Yahoo Query Language

5. YQL - Yahoo Query Language
Flickr
Yahoo
BOSS Geo
YQL in HTTP
s
es
c
Ac
Yahoo
Weather
Web
Service
Access
XML | JSON
CSV
HTML
Ac
ce
ss
JSON
XML
Yahoo
Finance
Instagram
RSS

6. YQL Usage Information





For commercial purposes
At least 6 months notice on YDN
Uptime target of over 99.5%
Register an API Key with Yahoo
YQL Console

7. YQL Statements

8. YQL Console

9. Case Study - Stock Quote



USE "http://www.datatables.org/yahoo/finance/yahoo.finance.quotes.xml" as
stock_quotes;
SELECT Symbol, Name, Open, DaysHigh, DaysLow, LastTradePriceOnly,
ChangeinPercent FROM stock_quotes where symbol in ("^DJI", "^IXIC", "^SPX",
"^SOX", "^N225", "^HSI", "^TWII", "YHOO", "AAPL", "GOOG", "IBM", "MSFT", "TSM",
"2330.TW", "2353.TW")
Familiar with JSON / XML

10. Dow Jones Index Issue

Why can't I download data from the Dow
Jones Index?



Yahoo! is no longer licensed to provide data
downloads for the Dow Jones Index.
Dow Jones Industrial Average [^DJI] data can
only be viewed on the screen.
Yahoo! Help

11. Yahoo Finance Lookup Symbol

12. Yahoo Stock Lookup Service



http://autoc.finance.yahoo.com/aut
oc?
query=Apple&callback=YAHOO.Fi
nance.SymbolSuggest.ssCallback
Familiar with JSON format
Symbol Lookup from Yahoo
Finance

13. PlaceFinder API

14. PlaceFinder API Usage Information



Yahoo BOSS Geo service
 RESTful Geocoding Web service
Currently supports 10 languages
 en, fr, de, it, es, pt, nl, zh (tw / cn), ja, ko
WOEID
 Where On Earth IDentifier

15. Case Study – City WOEID
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
SELECT city, woeid FROM geo.placefinder where text= "Taipei"
Familiar with JSON / XML

16. Flickr API

17. Flickr API Usage Information

Before using Flickr API

Get you API Key



Get api_key
Put your app in the Flickr App Garden
Limitations



Your application must stay under 3600 queries
per hour across the whole key
Your application can cache API results and
images for up to 24 hours
Flickr API Explorer

18. Case Study – City WOEID


SELECT woe_name, woeid FROM flickr.places where
api_key="???" and query="Taipei" and place_type_id="7"
Familiar with JSON / XML

19. Case Study - City Photo


SELECT * FROM flickr.photos.search(50) where api_key="???" and
tags="view, scenery, scene, landscape" and content_type="1" and
sort="interestingness-desc" and weoid="2306179"
Familiar with JSON / XML

20. Case Study - Area Photo
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
SELECT * FROM flickr.photos.search(50) where api_key="???" and
tags="view, scenery, scene, landscape" and content_type="1" and
sort="interestingness-desc" and lat="25.0259641" and lon="121.5293006"
and radius="32"
Familiar with JSON / XML

21. Case Study - Photo Information
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
SELECT * FROM flickr.photos.info where api_key="???" and
photo_id="3855224197" and secret="4ac2a27833"
Familiar with JSON / XML

22. Case Study - Photo EXIF
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
SELECT * FROM flickr.photos.exif where api_key="???" and
photo_id="3855224197"
Familiar with JSON / XML

23. Flickr Photo URL

Photo Source URL

http://farm{farm-id}.staticflickr.com/{server-id}/{id}_{secret}.jpg
http://farm{farm-id}.staticflickr.com/{server-id}/
{id}_{secret}_[mstzb].jpg

Size Suffixes
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

s, q, t, m, n, z, b
except -, c, o
Individual Photo URL
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http://www.flickr.com/photos/{owner-id}/{photo-id}
http://flickr.com/photo.gne?id={photo-id}

24. Instagram API

25. Instagram API Usage Information

Before using Instagran API

Register Your Application


Get client_id and client_secret
Limitations


Your application are limited to 5000 requests per
hour per client_id or access_token
Apigee API Console For Instagram

26. Case Study – Area Photo
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
SELECT data.link, data.images, data.caption FROM json where
url='https://api.instagram.com/v1/media/search?
lat=25.02597094&lng=121.5292736&distance=5000&client_id=???'
Familiar with JSON

27. Case Study – Popular Photo


SELECT data.link, data.images, data.caption FROM json where
url='https://api.instagram.com/v1/media/popular?client_id=???'
Familiar with JSON

28. Case Study – Recent Tagged Photo


SELECT data.link, data.images, data.caption FROM json where
url='https://api.instagram.com/v1/tags/spring/media/recent?client_id=???'
Familiar with JSON

29. Case Study – Location Search


SELECT data FROM json where
url='https://api.instagram.com/v1/locations/search?
lat=25.02597094&lng=121.5292736&distance=5000&client_id=???'
Familiar with JSON

30. Instagram Photo URL

Photo Source URL

images.standard_resolution.url attribute
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
images.low_resolution.url attribute
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
width 306px, height 306px
images.thumbnail.url attribute


width 612px, height 612px
width 150px, height 150px
Individual Photo URL

data.link attribute

31. Reference
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
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YQL Usage Information
 Register an API Key with Yahoo
Yahoo BOSS - Pricing
 PlaceFinder FAQ
What is Flickr App Garden?
 Flickr Developer Guide
 Flickr Place Find
 Flickr Photo Search
 Flickr Photo GetInfo
 Flickr Photo GetExif
 Photo Source URLs
Instagram Developer Documentation
 Instagram Authentication
 Instagram API Endpoints

32. Q&A