Hack Day EU 2011 YQL

YQL and the API hack stackJonathan LeBlancPrincipal Software Engineer / Technology EvangelistTwitter: @jcleblanc

What We’re Going to CoverYQL OverviewMaking Queries and the Console SandboxOpen Data Tables (a.k.a. Adding New Features into YQL)Execute (Server-Side JavaScript)Final Lessons

Overview: Don’t reinvent the wheel!

Overview: The Components of YQLYQL ServiceWeb APIYQL TableUSER

Overview: YQL Sets and deletes data

Overview: YQL is not a database

Making Requests: Fetching dataSELECT myColumn, myTitleFROM myTable(0, 50) WHERE myColumn = 'value' AND myTitle = 'title‘LIMIT 3 OFFSET 10

Making Requests: Inserting dataINSERT INTO bitly.shorten (login, apiKey, longUrl)VALUES ('ME', 'API_KEY', 'http://yahoo.com')

Making Requests: updating dataUPDATE social.profile.statusSET status="Using YQL UPDATE” WHERE guid="NJFIDHVPVVISDX7UKED2WHU"

Making Requests: deleting dataDELETE FROM twittertableWHERE tweetid="12345" AND username="twitter_username" AND password="twitter_password"

Making Requests: Sub SelectsSELECT * FROM geo.places WHERE text IN (SELECT location FROM social.profile WHERE guid = me)

Making Requests: The yql consolehttp://developer.yahoo.com/yql/console

Making Requests: Flickr URLs<photo farm="3" id="5708163920" isfamily="0" isfriend="0" ispublic="1" owner="31832337@N04" secret="0075137487" server="2496" title="San Francisco"/>

Making Requests: Flickr URLsPhoto URLhttp://farm{$farm}.static.flickr.com/{$server}/{$id}_{$secret}.jpgPhoto Page URLhttp://www.flickr.com/photos/{$owner}/{$id}Photo Owner Profile URLhttp://www.flickr.com/photos/{$owner}

Making Requests: url structurehttp://query.yahooapis.com/v1/yql?[params]http://query.yahooapis.com/v1/public/yql?[params]Paramsq= [ YQL QUERY ]

diagnostics = [ true / false ]

debug = [ true / false ]

callback = [ function name ]Making Requests: Private Datahttp://query.yahooapis.com/v1/yqlUses OAuth 1.0 for authorizationOAuth is complicated – use one of our SDKs at https://github.com/yahoo

Making Requests: Let’s See It

Open Data Tables: Top Level<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings></bindings></table>

Open Data Tables: Meta Node<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings></bindings></table>

Open Data Tables: Meta Node<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta> <author>Jonathan LeBlanc</author> <description>My Table</description> <documentationURL>www.site.com </documentationURL> <sampleQuery>SELECT * FROM {table} </sampleQuery> </meta> <bindings></bindings></table>

Open Data Tables: Bindings Node<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings></bindings></table>

Open Data Tables: Bindings Node<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings><select itemPath="top.child" produces="XML"> <urls> <urlenv="all">http://www.site.com/{user}</url> </urls> <inputs> <key id="user" type="xs:string" paramType="path" required="true" /> </inputs> </select> </bindings></table>

Open Data Tables: Using Your TableSeveral Choices:Upload the XML file to our community Github account.Upload the XML file to your own site and use the YQL ‘USE’ clause.

Open Data Tables: Community Tableshttp://github.com/yql/yql-tables

Open Data Tables: Using The USE ClauseThe USE clauseUSE 'http://www.mysite.com/my_table.xml' AS mytable; SELECT * FROM mytableWHERE user='john_doe'

Execute: Execute Node<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings><select itemPath="top.child" produces="XML"> <urls></urls> <inputs></inputs> </select> </bindings></table>

Execute: Execute Node<?xml version="1.0" encoding="UTF-8"?><table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta></meta> <bindings><select itemPath="top.child" produces="XML"> <urls></urls> <inputs></inputs> <execute></execute> </select> </bindings></table>

Execute: Server-Side JavaScript<execute> <![CDATA[ //get user specified inputs from YQL queryvararrQueries = inputs['query']; //create new XML nodesvarelQueries = <queries/>; //output new node as YQL response response.object = elQueries; ]]></execute>

Hack Day EU 2011 YQL

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