View
225
Download
6
Category
Tags:
Preview:
Citation preview
advanced topics in touchdevelop
cloud servicesaccess to everything over the web
Disclaimer: This document is provided “as-is”. Information and views expressed in this document, including URL and other Internet Web site references, may change without notice. You bear the risk of using it. This document does not provide you with any legal rights to any intellectual property in any Microsoft product. You may copy and use this document for your internal, reference purposes. © 2012 Microsoft Corporation. All rights reserved. Microsoft, Windows, and Windows Live are trademarks of the Microsoft group of companies. All other trademarks are property of their respective owners.
advanced topics in touchdevelop
what it iso “meta API”
• retrieve all information visible in touchdevelop app
• outlook: callbacks, plugins (meta apps)
o build on web standards• HTTP, REST, JSON
✿ touchdevelop.com/help/cloudservices
advanced topics in touchdevelop
architectureo front-ends
• TouchDevelop WP7 app talks with Azure Web Service
• (any) browser talks with Azure Web App
o Windows Identity Foundation• allows users to authenticate with Windows Live ID, Facebook
o Azure• web site talks with Azure Web Service
• web service controls Azure Storage
• storage (public data)
• storage (private data)
advanced topics in touchdevelop
AzureStorage (public)
AzureWeb
Service
AzureWeb Site
Windows Identity
Foundation
AzureStorage (private)
WP7 devices withTouchDevelop app
web browser
advanced topics in touchdevelop
HTTPo HyperText Transfer Protocol o the protocol used by the World Wide
Web
advanced topics in touchdevelop
HTTP exampleo Request Headers
• GET http://www.touchdevelop.com/api/ecvs HTTP/1.1 • Host: www.touchdevelop.com • Cache-Control: max-age=0 • Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
• Accept-Encoding: gzip,deflate,sdch
o Response Headers• HTTP/1.1 200 OK • Content-Length: 451 • Expires: -1 Date: Fri, 10 Feb 2012 02:51:48 GMT • Content-Type: application/json; charset=utf-8 • Cache-Control: no-cache, no-store • Pragma: no-cache
advanced topics in touchdevelop
RESTo REST (Representational State Transfer) is a
lightweight alternative to mechanisms like RPC (Remote Procedure Calls) and Web Services (SOAP, WSDL, et al.).
o RESTful applications use HTTP requests to post data (create and/or update), read data (e.g., make queries), and delete data. Thus, REST uses HTTP for all four CRUD (Create/Read/Update/Delete) operations.
advanced topics in touchdevelop
REST hereo Currently, only supported verb is ‘GET’o All accesses are stateless
advanced topics in touchdevelop
JSONo JSON (JavaScript Object Notation) is
a lightweight data-interchange format.
o two building blocks:• a collection of name/value pairs
(“object”, “record”, …)
• an ordered list of values (“array”, …)
advanced topics in touchdevelop
JSON grammarjson: string | number | boolean |
array | object
string/number/boolean follow grammar of corresponding JavaScript literals
array: “[“ [json (“,” comma)*] “]”field: string “:” jsonobject: “[“ field [(“,” field)*] “]”
example
[ “elem0”, 1, { “x” : “value of field x”, “y” : 42 }, false]
advanced topics in touchdevelop
JSON exampleo GET http://www.touchdevelop.com/api/ecvs HTTP/1.1
{ "kind":"script", "time":44139093, "id":"ezdf", "url":"http://touchdevelop.com/ezdf", "name":"Smart Rail Table", "description":"", "userid":"yvfc", "username":"Sascha M. B.", "icon":"directions", "iconbackground":"#008000", "iconurl":"https://az31353.vo.msecnd.net/c01/wbso.png", "positivereviews":0, "comments":0, …
advanced topics in touchdevelop
JSON example
… "capabilities":[ {"name":"sourcegeolocation","iconurl":"https://az31353.vo.msecnd.net/c01/qzgl.png"}, {"name":"sinkweb","iconurl":"https://az31353.vo.msecnd.net/c01/mopx.png"} ], "flows":[], "haserrors":false, "rootid":"dgig", "updateid":"ezdf", "ishidden":false, "islibrary":false, "installations":0, "runs":0}
advanced topics in touchdevelop
main listso /api/new-scriptso /api/top-scriptso /api/featured-scriptso /api/search?text=[text]o /api/userso /api/commentso /api/screenshotso /api/reviewso optional list parameters: ?
count=[number]&continuation=[token]
advanced topics in touchdevelop
publication propertieso /api/[id]o /api/[scriptid]/texto /api/[scriptid]/asto /api/[scriptid]/successorso /api/[scriptid]/baseo /api/[userid]/scriptso /api/[scriptid or userid or commentid]/commentso /api/[scriptid or userid]/screenshots o /api/[commentid or scriptid or userid]/reviews o /api/[userid]/picture
advanced topics in touchdevelop
apis: jsono Web→download json
Downloads a web service response as a JSON data structure
o Json Object→kindGets a json kind (string, number, boolean, object, array)
o string: Json Object→to stringo number: Json Object→to numbero boolean: Json Object→to booleano object: Json Object→keys, Json
Object→fieldo array: Json Object→at, Json Object→counto
advanced topics in touchdevelop
exercise► in touchdevelop, write code that…• Posts the names of new scripts
• Posts links to the urls of new scripts
► in touchdevelop, write code that figures out…• of the (around) 100 new scripts,
which have at least one ♥ ?
☁ http://touchdevelop.com/axaw (solution)
advanced topics in touchdevelop
homework► in your favorite language, write code that figures out…• how many scripts are there?
• how many AST nodes does the biggest script have?
• which script got the most ♥ ?
• which user gave the most ♥ ?
• what is the longest script (number of lines)?
• which script got updated the most?
Recommended