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YQL and the API hack stack<br />Jonathan LeBlanc<br />Principal Software Engineer / Technology Evangelist<br />Twitter: @jcleblanc<br />

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What We’re Going to Cover<br />YQL Overview<br />Making Queries and the Console Sandbox<br />Open Data Tables (a.k.a. Adding New Features into YQL)<br />Execute (Server-Side JavaScript)<br />Final Lessons<br />

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What We’re Going to Cover<br />YQL Overview<br />Making Queries and the Console Sandbox<br />Open Data Tables (a.k.a. Adding New Features into YQL)<br />Execute (Server-Side JavaScript)<br />Final Lessons<br />

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Overview: Don’t reinvent the wheel!<br />

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Overview: The Components of YQL<br />YQL Service<br />Web API<br />YQL Table<br />USER<br />

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Overview: YQLFETCHesdata<br />

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Overview: YQL Sets and deletes data<br />

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Overview: IS YQL A DATABASE?<br />

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Overview:YQL is not a database<br />

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What We’re Going to Cover<br />YQL Overview<br />Making Queries and the Console Sandbox<br />Open Data Tables (a.k.a. Adding New Features into YQL)<br />Execute (Server-Side JavaScript)<br />Final Lessons<br />

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Making Requests: Fetching data<br />SELECT myColumn, myTitle<br />FROM myTable(0, 50) <br />WHERE myColumn = 'value' <br />AND myTitle = 'title‘<br />LIMIT 3 OFFSET 10<br />

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MakingRequests: Inserting data<br />INSERT INTO bitly.shorten (login, apiKey, longUrl)<br />VALUES ('ME', 'API_KEY', 'http://yahoo.com') <br />

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MakingRequests: updating data<br />UPDATE social.profile.status<br />SET status="Using YQL UPDATE” <br />WHERE guid="NJFIDHVPVVISDX7UKED2WHU"<br />

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MakingRequests: deleting data<br />DELETE FROM twittertable<br />WHERE tweetid="12345" <br />AND username="twitter_username" <br />AND password="twitter_password"<br />

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MakingRequests: Sub Selects<br />SELECT * FROM geo.places WHERE textIN (SELECT location FROM social.profile WHERE guid = me)<br />

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MakingRequests: The yql console<br />http://developer.yahoo.com/yql/console<br />

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MakingRequests: Flickr URLs<br /><photofarm="3"<br />id="5708163920"<br />isfamily="0"<br />isfriend="0"<br />ispublic="1"<br />owner="31832337@N04"<br />secret="0075137487"<br />server="2496"<br />title="San Francisco"/><br />

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MakingRequests: Flickr URLs<br />Photo URL<br />http://farm{$farm}.static.flickr.com/{$server}/{$id}_{$secret}.jpg<br />Photo Page URL<br />http://www.flickr.com/photos/{$owner}/{$id}<br />Photo Owner Profile URL<br />http://www.flickr.com/photos/{$owner}<br />

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Making Requests: url structure<br />http://query.yahooapis.com/v1/yql?[params]<br />http://query.yahooapis.com/v1/public/yql?[params]<br />Params<br /><ul><li>q= [ YQL QUERY ]

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format = [ XML / JSON]

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diagnostics = [ true / false ]

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debug = [ true / false ]

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env= [ .env file URL ]

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callback = [ function name ]</li></li></ul><li>Making Requests: Private Data<br />http://query.yahooapis.com/v1/yql<br />Uses OAuth 1.0 for authorization<br />OAuth is complicated – use one of our SDKs athttps://github.com/yahoo<br />

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Making Requests: Let’s See It<br />

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What We’re Going to Cover<br />YQL Overview<br />Making Queries and the Console Sandbox<br />Open Data Tables (a.k.a. Adding New Features into YQL)<br />Execute (Server-Side JavaScript)<br />Final Lessons<br />

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

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

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

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

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

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Open Data Tables: Using Your Table<br />Several Choices:<br />Upload the XML file to our community Github account.<br />Upload the XML file to your own site and use the YQL ‘USE’ clause.<br />

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Open Data Tables: Community Tables<br />http://github.com/yql/yql-tables<br />

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Open Data Tables: Using The USE Clause<br />The USE clause<br />USE 'http://www.mysite.com/my_table.xml' <br />ASmytable; <br />SELECT * FROMmytable<br />WHERE user='john_doe'<br />

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What We’re Going to Cover<br />YQL Overview<br />Making Queries and the Console Sandbox<br />Open Data Tables (a.k.a. Adding New Features into YQL)<br />Execute (Server-Side JavaScript)<br />Final Lessons<br />

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

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

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

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What We’re Going to Cover<br />YQL Overview<br />Making Queries and the Console Sandbox<br />Open Data Tables (a.k.a. Adding New Features into YQL)<br />Execute (Server-Side JavaScript)<br />Final Lessons<br />

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Final Lessons<br />YQL is a skeleton key for all Yahoo! APIs<br />Open data tables allow you to create new data feeds out of one or many different raw sources<br />Execute allows you to manipulate data before it is returned.<br />Use SDKs when accessing private data that requires OAuth<br />

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Final Lessons: Links<br />All Yahoo! APIs and Services<br />http://developer.yahoo.com/everything.html<br />YQL Documentation<br />http://developer.yahoo.com/yql<br />YQL Console<br />http://developer.yahoo.com/yql/console<br />YQL Github Account (Contribute Tables)<br />http://github.com/yql/yql-tables<br />

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Any questions?<br />http://www.slideshare.com/jcleblanc/<br />Jonathan LeBlanc<br />Twitter: @jcleblanc<br />E-Mail: jleblanc@yahoo-inc.com<br />