How to Use Yahoo Query Language (YQL) to Query Data Sources

Yahoo Query Language
select * from internet

Pedro Valente
@pedrovalente

Hoje vou fazer o seguinte:

• Explicar o que é YQL



• Dar exemplos de como funciona




• Mostrar onde aprender mais




• Mostrar onde aprender mais

• Dar dois recados que interessam a vocês!
Mas só no ﬁnal :)

De um lado, temos desenvolvedores

http://farm4.static.ﬂickr.com/
3643/3516125392_8583644c56_b.jpg

Do outro lado, um monte de sites e serviços

Juntando desenvolvedores
com sites e serviços

Juntando desenvolvedores
com sites e serviços

surgem Mashups (aplicações)

manipulação de dados
Aplicação =

manipulação de dados
Aplicação = +
visualização de dados

var map = new YMap
(document.getElementById('map'));
…
dev var currentGeoPoint = new YGeoPoint
( _c.Lat, _c.Lon );
map.addMarker(currentGeoPoint);
…

var map = new YMap
…
( _c.Lat, _c.Lon );
…

…
if (flickcurl_prepare(fc,
"flickr.photos.geo.correctLocation",
parameters, count)) { … }
…

var map = new YMap
…
( _c.Lat, _c.Lon );
…

…
…

http://search.yahooapis.com/
ImageSearchService/V1/imageSearch?
appid=YahooDemo&query=Corvette&results=2

var map = new YMap
…
( _c.Lat, _c.Lon );
…

…
…


http://weather.yahooapis.com/
forecastrss?p=FRXX0076&u=c

var map = new YMap
…
( _c.Lat, _c.Lon );

?
…

…

?
…

? http://search.yahooapis.com/

?
http://weather.yahooapis.com/

Yahoo! My Yahoo! Mail Welcome, guest Sign In

Search

MY PROJECTS APIs & WEB SERVICES var map = new YMap
RESOURCES SUPPORT

YDN Maps Suite AJAX Maps (document.getElementById('map'));
Yahoo! Maps Web Services - AJAX API Getting … READY TO GET STARTED?
You aren't signed in Sign In Help

Started Guide Get an App ID
var currentGeoPoint = new YGeoPoint
dev Home The Tour Sign Up Explore Search
Learn the fundamentals of the Yahoo! Maps AJAX API and start creating your own maps. This page contains:

Introduction and Prerequisites
( _c.Lat, _c.Lon ); Yahoo! Maps Cheatsheets
Examples Flickr Services Yahoo! My Yahoo! Mail RECENT BLOG ARTICLES Welcome, guest Sign In

API Documentation Feeds Your API Keys map.addMarker(currentGeoPoint);
Display a Yahoo! Map

?
Apply for a new API Key
Add controls to your Yahoo! Map Leonardo da Vinci: Hacker Search
Add a logger to a Yahoo! Map
Place a marker on a Yahoo! Map … MY PROJECTS
January 24, 2009

APIs & WEB SERVICES RESOURCES SUPPORT
Draw Polylines on a Yahoo! Map Whaddyathink? & the Yahoo! Application
flickr.places.getPlaceTypes
Place Smart Markers on a Yahoo! Map
Add multiple custom markers on Yahoo! Map
YDN Weather RSS Feed
Platform
January 22, 2009
Traffic information overlay
Yahoo! Pipes RSS output information overlay Yahoo! Weather RSS Feed Making the new Yahoo! Currency Converter
Yahoo! My Yahoo! Mail Welcome, guest Sign In
Local search results overlay
Fetches a list of available place types for Flickr.
Yahoo! Pipes JSON output information overlay
YMap accessible
The Weather RSS feed enables you
Januaryto get up-to-date weather information for your location. You can save this
21, 2009
Overlay GeoRSS XML data
Overlay custom objects at YGeoPoint location
…
feed in My Yahoo! or your favorite feed aggregator, or incorporate the RSS data into your own web site or client
Search

application. The Weather RSSRetrievingdynamically-generatedfrom based on zip code or Location ID.
feed is a and displaying data feed
Authentication
Overlay custom objects at YCoordPoint location
Overlay polyline on Yahoo! Map if (flickcurl_prepare(fc,
Wikipedia with YQL PROJECTS
MY APIs & WEB SERVICES RESOURCES
This page describes the format of the 18, 2009 URL and the RSS response for developers. It contains these
January request
SUPPORT

?
Export Yahoo! Map in GeoRSS format YDN Image Search Documentation for Yahoo! Search Web Services
This method does not require authentication.
GeoRSS overlay with polyline
sections:
Get zoom level given radius from center
Custom position of controls Arguments RSS Request Image Search Documentation for Yahoo! Search READY TO GET STARTED?

Change Marker Images Dynamically
Use YMapTypeControl to position map types
Summary
Request Parameters
By applying for an Application ID for this service, you
hereby agree to the Terms of Use

Submitting Image Queries
Rate Limit
api_key (Required)
Other Features of the Yahoo! Maps AJAX API
…
RSS Response
YEvent, YGeoRSS, YMarker
Your API application key. See here for moreTop-Level Elements
details. The Image Search Web Service allows you to search the Internet for images.
Get an App ID
Terms of Service Channel Elements
Support & Community
Image Elements
Example Response

?
Item Elements
Download all of the cheatsheets and example code in the Yahoo Request URL
Maps API Reference Bundle. Condition Codes YAHOO! GROUPS DISCUSSIONS view all
<place_types> Examples http://search.yahooapis.com/ImageSearchService/V1/imageSearch
For detailed descriptions of the classes and methods in the API, place_type_id="22">neighbourhood</place_type>
<place_type yahoo local search code in php
Terms of Use
Tue, 27 Jan 2009
check out v3.8 Reference Manual. <place_type place_type_id="7">locality</place_type>
<place_type
<place_type
place_type_id="9">county</place_type>
RSS Request
place_type_id="8">region</place_type>
Remaining, Supporting Classes
Request parameters My Web Search API shut down
See information on constructing REST queries announcement

Introduction and
<place_type
Prerequisites
<place_type
place_type_id="12">country</place_type>
The Weather RSS feed request follows simple HTTP GET syntax: start with a base URL and then add
place_type_id="29">continent</place_type> (?). Multiple parameters are separated by an ampersand (&).
parameters and values after a question mark
Wed, 21 Jan 2009
Parameter Value Description
</place_types>
The Yahoo! AJAX Maps API lets developers add maps to their web sites using DHTML and JavaScript®. the Weather RSS feed is
The base URL for Maps
appid string (required) The application ID. See Application IDs for more information.
Re: Site Explorer API returns 999 Rate Limit
Exceeded
are fully embeddable and scriptable using the JavaScript programming language. Yahoo! Maps AS-Flash API's query string (required) The query to search for. Use + to include terms, - to exclude terms, and Wed, 21 Jan 2009

?
Error Codes
built-in geocoder means that you can specify a physical address or latitude/longitude coordinates for your map's
http://weather.yahooapis.com/forecastrss put quotes around "exact phrase".
location, as you like. type all (default), any, or The kind of search to submit: Reminder: Old obsolete versions of Local
In this section, Summary shows how to make an RSS request with different parameters; Request Parameters
phrase Search (V1, V2) shutting do
In order to create and test applications 100: Yahoo! Maps AJAX API, you'll need to use a supported summarizing those parameters.
using Invalid API Key shows a table web all returns results with all query terms. Mon, 19 Jan 2009
The API key passed was not valid or has expired.
browser: Firefox 2, Internet Explorer 6 or 7, Opera 9 or Safari 3. Newer versions of these browsers are also any returns results with one or more of the query terms.
supported. You can code your JavaScript applications usingcurrently unavailable
105: Service your favorite text editor or IDE. phrase returns results containing the query terms as a phrase.
SUMMARY results integer: default 10, The number of results to return.
The requested service is temporarily unavailable.
An application ID is required to use the Yahoo! Maps AJAX API. You can get an application ID here. max 50
The Weather RSS feed request follows simple HTTP GET syntax: start with a base URL and then add
111: Format "xxx" not found
start integer: default 1
parameters and values after a question mark (?). Multiple parameters are separated by an starting result position to return (1-based). The finishing position (start
The ampersand (&). For
For best results, you should launch your web pagesrequested response format was not found. applications
The from a web server. However, it's possible to run + results - 1) cannot exceed 1000.
the Weather RSS feed there are two parameters:
directly from your hard drive by double-clickingMethod This can be donefound
112: on them. "xxx" not by lowering the security settings in format any (default), bmp, Specifies the kind of image file to search for.
the Internet Explorer browser or by setting the The requested method was not found. p for location.
UniversalBrowserRead property in Firefox. gif, jpeg, png
u for degrees units (Fahrenheit or Celsius). adult_ok
114: Invalid SOAP envelope
http://weather.yahooapis.com/ no value or 1 The service filters out adult content by default. Enter a 1 to allow adult
content.
The SOAP envelope send in the requestlocationnot be parsed. required. Use this parameter to indicate the location for the weather forecast as a
The could parameter p is
Displaying a Yahoo! Map zip code or Location ID. coloration any (default), color, The service returns only the images of the coloration specified (color or
115: Invalid XML-RPC Method Call
All the API classes and methods necessary to interact with Yahoo! Mapsdocument couldyour application when
The XML-RPC request are availablehttp://weather.yahooapis.com/forecastrss?p=location
to not be parsed.
bw black-and-white).
site string: default no A domain to restrict your searches to (e.g. www.yahoo.com). You may
you include Yahoo! Maps AJAX API library in your web page.This example uses the demonstration application
value submit up to 30 values (site=www.yahoo.com&site=www.cnn.com).
ID "YD-eQRpTl0_JX2E95l_xAFs5UwZUlNQhhn7lj1H"; you cannot use this Application Forand must requestweather for Yahoo! Headquarters in Sunnyvale, CA, use the zip
ID example, to get one code for Sunnyvale
here. API Explorer (94089):
output string: xml The format for the output. If json is requested, the results will be returned
(default), json, php in JSON format. If php is requested, the results will be returned in
Serialized PHP format.
. <html> API Explorer : flickr.places.getPlaceTypes
http://weather.yahooapis.com/forecastrss?p=94089
. <head> callback string The name of the callback function to wrap around the JSON data. The
. <b><script type="text/javascript" Or use the Location ID for Sunnyvale (USCA1116): following characters are allowed: A-Z a-z 0-9 . [] and _. If output=json has
. src="http://api.maps.yahoo.com/ajaxymap?v=3.8&appid=YD- not been requested, this parameter has no effect. More information on the

dev

Bindings

YQL stmt
YQL

dev

Bindings

YQL stmt
YQL
select

dev

Bindings

YQL stmt
YQL
select
desc

dev

Bindings

YQL stmt
YQL
select
desc
show

select {what} from
{service} where
{condition}

select {what} from
{service} where
{condition}
show tables

desc table

select {what} from
{service} where
{condition}
show tables

desc table

select {what} from
{service} where
{condition}
show tables filtros
remotos e
locais

A ferramenta

http://developer.yahoo.com/yql/console

• Tudo ﬁca num arquivo XML

• Qualquer um pode fazer

• Qualquer um pode fazer
• Manda lá pro Github
http://www.datatables.org/
http://github.com/yql/yql-tables

Começamos com um usuário do Meme
http://meme.yahoo.com/tommarques

SELECT * FROM meme.info WHERE
name='tommarques'

SELECT * FROM meme.info WHERE
name='tommarques'
"results":{
   "meme":{
    "guid":"66VIWI4DGQ44QE2VHU5EAT545E",
    "name":"tommarques",
    "title":"Tom Marques",
    "description":null,
    "url":"http://meme.yahoo.com/tommarques/",
    "avatar_url":"http://d.yimg.com/gg/tommarques/
avatars/
9bc435ebdc410b85f2971aba0800f806610d49ca.jpeg",
    "language":"pt",
    "followers":"131"
   }
  }

Não esqueça!
Você pode testar todas as queries
mostradas aqui no console do YQL
(se tiver internet, é claro)


SELECT guid FROM meme.info WHERE
name='tommarques'

SELECT * FROM meme.posts WHERE
owner_guid in (
name='tommarques'
);

SELECT * FROM meme.posts WHERE
owner_guid in (
name='tommarques'
);
"post":[{
"pubid":"4OSYwPo",
"guid":"66VIWI4DGQ44QE2VHU5EAT545E",
"url":"http://meme.yahoo.com/tommarques/p/4OSYwPo/",
"timestamp":"1252393121879",
"type":"photo",
"content":"http://d.yimg.com/gg/patypegorin/
afa34f168e337617e625d978b6e5b32dcd6c45a9.jpeg",
"repost_count":"29",
"comment":"",
"caption":"",
...

Um post dele
http://meme.yahoo.com/tommarques/p/oOaPL9d/

SELECT * FROM meme.post.info WHERE pubid='oOaPL9d'
AND owner_guid in (
SELECT guid FROM meme.info WHERE name='tommarques'
);

SELECT * FROM meme.post.info(300) WHERE

pubid='oOaPL9d' AND owner_guid in (


) AND comment != '';

SELECT * FROM meme.post.info(300) WHERE

pubid='oOaPL9d' AND owner_guid in (



{
     "type":"comment",
     "guid":"OKF7PJQWUFNCNWKVOB3BGHM37I",
     "pubid":"Md_v-Hw",
     "origin":"66VIWI4DGQ44QE2VHU5EAT545E",
     "origin_pubid":"oOaPL9d",
     "via":"OKF7PJQWUFNCNWKVOB3BGHM37I",
     "timestamp":"1256438370",
     "comment":"ops, moro em Goias, mas sou do RJ"
    },

Olha o que aconteceu nos bastidores:

<diagnostics>
<publiclyCallable>true</publiclyCallable>

<url execution-time="29"><![CDATA[http://meme/api/v1/public/info/?
name=tommarques]]></url>

<url execution-time="381">
<![CDATA[http://meme/api/v1/public/permalink/info/?
pubid=oOaPL9d&owner_guid=66VIWI4DGQ44QE2VHU5EAT545E&page=1&count=100]]>
</url>

<url execution-time="204">
<![CDATA[http://meme/api/v1/public/permalink/info/?
pubid=oOaPL9d&owner_guid=66VIWI4DGQ44QE2VHU5EAT545E&page=2&count=100]]>
</url>

<user-time>651</user-time>
<service-time>614</service-time>
<build-version>4265</build-version>
</diagnostics>

Conseguimos uma lista de lugares...


"comment":"Pindamonhangaba e sim, a cidade existe."



"comment":"putiz sou de cotia sp"




"comment":"Salvador...Baeeaaaaaaaaa"





"comment":"Boa noite memers, ah sou de Belém do Pará"





"comment":"Boa noite memers, ah sou de Belém do Pará"

... mas em linguagem beeem natural :(

SELECT * FROM geo.places WHERE
text = "o Rio de Janeiro continua lindo"


"place":{
    "lang":"en-US",
    "uri":"http://where.yahooapis.com/v1/place/
455825",
    "woeid":"455825",
    "placeTypeName":{
     "code":"7",
     "content":"Town"
    },
    "name":"Rio de Janeiro",
    "country":{
     "code":"BR",
     "type":"Country",
     "content":"Brazil"
    },
...


"place":{
    "lang":"en-US",
    "uri":"http://where.yahooapis.com/v1/place/
455825",
    "woeid":"455825",
    "placeTypeName":{
     "code":"7",
     "content":"Town"
Hadouken!
    },
    "name":"Rio de Janeiro",
    "country":{
     "code":"BR",
     "type":"Country",
     "content":"Brazil"
    },
...


Hadouken!

SELECT woeid FROM geo.places WHERE text in (
SELECT comment FROM meme.post.info(300) WHERE pubid='oOaPL9d'

AND owner_guid in (


) | unique(field='woeid')

Conseguimos uma lista de woeids...

Conseguimos uma lista de woeids...

...mas como descobrir onde usar? :(

DESC flickr.photos.search

<key name="machine_tags" type="xs:string"/>
<key name="safe_search" type="xs:string"/>
<key name="privacy_filter" type="xs:string"/>
<key name="contacts" type="xs:string"/>
<key name="tag_mode" type="xs:string"/>
<key name="user_id" type="xs:string"/>
<key name="license" type="xs:string"/>
<key name="geo_context" type="xs:string"/>
<key name="lat" type="xs:string"/>
<key name="tags" type="xs:string"/>
<key name="lon" type="xs:string"/>
<key name="text" type="xs:string"/>
<key name="max_taken_date" type="xs:string"/>
<key name="is_commons" type="xs:string"/>
<key name="radius" type="xs:string"/>
<key name="woe_id" type="xs:string"/>
<key name="has_geo" type="xs:string"/>

SELECT * FROM flickr.photos.search
WHERE text='campus party'


WHERE is_commons='true'


WHERE is_commons='true'

WHERE user_id='foobar'

SELECT * FROM flickr.photos.search(100)
WHERE has_geo="true" and woe_id in (


AND owner_guid in (


)



AND owner_guid in (


)

<results>
<photo farm="3" id="4125642160" isfamily="0" isfriend="0" ispublic="1"
owner="21381694@N07" secret="af0b6091b2" server="2629" title="Numa noite
dessas, por ai..."/>
owner="11264537@N05" secret="34f6ce4517" server="2660" title="AST Facilities
02"/>
owner="44116004@N03" secret="5115fe3d9d" server="2538" title="Negao e Vinny"/>

...



AND owner_guid in (


)

Em uma query,
3 sites/serviços diferentes,
3 APIs distintas

insert into twitter.status
(status,username,password) values
("new tweet from YQL",”xxx”,”yyy”);

delete from twitter.status where
id="2108869549" and username="xxx"
and password="yyy"

use ‘http://url-to-def.xml’ as tableName;

select * from tableName where ...

Fork me!
http://github.com/yql/yql-tables

• javascript rodando no servidor
• acessa APIs com autenticação
• juntar pesquisas distintas

• melhorar os dados
• criar API a partir de html (scraping)
• transformar dados
• mover lógica da aplicação para o cloud

<execute><![CDATA[
// Your javascript goes here.
response.object = <item>
<url>{request.url}</url>
<a>{a}</a>
<b>{b}</b>
</item>;
]]></execute>

Mão na massa:
http://developer.yahoo.com/yql/guide/yql-code-examples.html

entendeu pra que serve
o YQL?

pra construir aplicações
de forma mais fácil

• menos linhas de código
• sintaxe consistente para acesso a dados

pra construir aplicações
mais rápidas
mais rápido

• serviço no cloud faz o trabalho
• processamento, ﬁltros, conversões
• menos chamadas de serviços
• infraestrutura conﬁável

• http://developer.yahoo.com/yql/

• http://developer.yahoo.com/meme/

How to Use Yahoo Query Language (YQL) to Query Data Sources

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