A Quick Introduction to YQL

The Web is your API with YQL

Working with data from the web? Hate jumping through API hoops?

What we do... 1. Find a good API 2. Sign up for developer key 3. Confirm sign up 4. Find required method 5. Read docs 6. Authenticate? 7. Read docs again 8. Receive a chunk of data 9. Filter data to make it useful

What we want... 1. Find good data 2. Request and filter data 3. Do something with the data

That's where YQL comes in... (http://developer.yahoo.com/yql/console/)

SELECT {something} FROM {somewhere} WHERE {conditions} The web becomes your database Single URI/end-point Select, Insert, Update and Delete Filter, Sort and Limit

YQL is an open web service No other Yahoo tools needed Return data as XML, JSON, JSON-P

Easy to use YQL console Helps build queries like https://query.yahooapis.com/v1/public/ yql?q={uri_encoded_query}& format={xml|json}& diagnostics={true|false}& callback={function}

Call service in PHP using cURL $yql = 'SELECT * ' . 'FROM ukgeocode ' . 'WHERE postcode = "EH5 2GJ"'; $service = 'http://query.yahooapis.com/v1/public/yql?'; $url = $service . '&q=' . url_encode($yql); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $out = curl_exec($ch); curl_close($ch); print_r($out);

Not limited to data provided by Yahoo Community contributed data tables (http://datatables.org/) Contribute with definition file You can use server-side javascript

<?xml version="1.0" encoding="UTF-8"?> <table xmlns="http://query.yahooapis.com/v1/schema/table.xsd"> <meta> <sampleQuery>Sample query here</sampleQuery> <author>A. Nother</author> <documentationURL>Tell me more here.</documentationURL> <description>Brief description here.</description> </meta> <bindings> <select itemPath="response.coord" produces="XML"> <urls> <url> http://ukgeocode.maxmanders.co.uk/postcode/{postcode} </url> </urls> <inputs> <key id='postcode' type='xs:string' paramType='path' required="true" /> </inputs> </select> </bindings> </table>

http://developer.yahoo.com/yql/ http://github.com/yql/yql-tables/ http://datatables.org/

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A Quick Introduction to YQL

by Max Manders on Aug 11, 2010

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A Quick Introduction to YQL — Presentation Transcript