is the web "good enough" for web services?

8/14/2019 Is the Web "Good Enough" for Web Services?

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Is The Web"Good Enough"

forWeb services?

Paul Downey

15th March 2007


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SORRY!


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NO T Stev e Vinoski!


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resteyeFOR THE

SOA GUY


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ARCHITECTUR

Styles


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Style WTF

ARCHITECTUR


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REST://(v)


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The greatest thing in

is to have a

command of the Style

metaphor


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pwnz0red!


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IC T

b lf


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personasdeperimiterisation

virtualisation

outsourcingubiquitous web

mobile

agileoffshoring

presence

identity

federation

open

St d d


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Standards


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Web

services

Web

services


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REST://


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K l R i k Ch


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Karl Rove and Dick Cheney to write the Democratic Party Platform


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REST*THE*BOOK?

http://www.crummy.com/writing/RESTful-Web-Services/


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General von Moltke

Active Lazy


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CaptureValue

DiscoverValue

MaintainValue

DestroyValue

Active Lazy

Smart

Dumb

Everything You Hate About ITA d W 't Af id T S


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- And Weren't Afraid To Say


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http://www.soacenter.com/?p=33


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Explicit Boundaries


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Op

shared contract and schema, not class

Policy Driven

10 Principles of SOA by Stefan Tilkov

autonomous wire formats not Programming Language APIs

Document Oriented

Metadata Drivenloosely coupled standards compliant

vendor independent


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Metadata

Driven?!


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"Stopping the

world

to describe it"


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META-META-DATA


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HTML

WS-Policy

XForms

Time

C o m m i t m e n t WADL

CannedHTTPPOST

WSDLHTTP

OPTIONS

DESCRIPTION


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CONTENTS EVOLUTION ASYNCH

DESCRIPTIONPAIN POINTS


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DO

THE AGREEDTHING!

EXPECTED


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Web services

Messaging


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Messaging

Messaging


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MessagingSystems


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EPR


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NO "STACK"


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NO STACK


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bwlAKau7KQAubgGNJzysZoEEF8o=

kyBw9fnMjhi2I39+wfBIklyk8g4=

XW2FqP9o/A1J+NOg6Kv3ncn3PvSg5lzr2V4H/AQpRycXUSk7bzWK8kzhtMrlXUwkykrJ2AyEzw+xrRtSBIeaId1Iveme2KO02p21MTglr73cPCft/

GHvEvAHZ4B6N6gSaX7NcGFrYnsYKP0nX5vT7jBh7WZ7Euqn0PyjCHyYxbU=

2007-02-23T07:47:01Z2007-02-23T08:47:01Z

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

http://sdk.bt.com/2007/01/WhiteLabelAuthentication#loginurn:uuid:e12edac3-f87d-3e0a-b621-04fa4d0b8cda

[email protected]

HEADERHELL

IN


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UNORD

ED

BAG

3IN

21


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Services on theWeb?


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They


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They

HATE SOAP!


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Isn't the Web"Good Enough?"


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POX!


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POX REST


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URIsidentify things


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and they can beanywhere ..


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IS IT SAFE?


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IS IT SAFE?

Resources


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cool URIs

Resourcesdemand

cool URIs


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Message-Id:

X-Original-To: [email protected]: http://www.w3.org/mid/

2A7793353757DB4392DF4DFBBC9522550A20155C@I2KM11-UKBR.domain1.systemhost.net

HTTP METHODS


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method safe idempotent semantics resource cacheable-----------------------------------------------------------

GET | X X X X X |HEAD | X X X X X |PUT | X X X |POST | * |DELETE | X X X |OPTIONS | X X X |

-----------------------------------------------------------PROPFIND | X X X X * |PROPPATCH | X X X |MKCOL | * X X |COPY | X X X |MOVE | ? X X |LOCK | X X |

UNLOCK | X X X |PATCH | * X X |-----------------------------------------------------------


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htt ://thou ht ad.net/who/alan-dean/ima e/htt -headers-status/

Presentation


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Presentation

Style? Substance?


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Knowwhat it is you

trying to build!

#1


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FollowBuilding !

Regulations

#2

Let's make a


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Phone

Call!

Web21C


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sdk.bt.com

Web21C

Web21C


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MAKE CALLS

SEND TEXTSLOCATE MOBILESMANAGE CONTACTSetc..


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http://sdk.bt.com/2007/01/Session/ThirdPartyCall.wsdl

WSDL


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END CALL


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callId


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HEADERS?


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bwlAKau7KQAubgGNJzysZoEEF8o=

kyBw9fnMjhi2I39+wfBIklyk8g4=

XW2FqP9o/A1J+NOg6Kv3ncn3PvSg5lzr2V4H/AQpRycXUSk7bzWK8kzhtMrlXUwkykrJ2AyEzw+xrRtSBIeaId1Iveme2KO02p21MTglr73cPCft/

GHvEvAHZ4B6N6gSaX7NcGFrYnsYKP0nX5vT7jBh7WZ7Euqn0PyjCHyYxbU=

2007-02-23T07:47:01Z2007-02-23T08:47:01Z

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

http://sdk.bt.com/2007/01/WhiteLabelAuthentication#loginurn:uuid:e12edac3-f87d-3e0a-b621-04fa4d0b8cda

[email protected]

HEADERS?

. serv ce eve s2. customisation3 security


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3. security 4. currency

6. exception handling5. obligation

7. compensating transactions

9. monitoring

8. choreography

10. versioning11. transformation


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REST://


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HTTP GET http://example.com/calls/123213

GET CALL INFO


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Accept: text/xml

!

200 OKContent-Type: text/xml; charset=utf-8

http://example.com/user/fred/calls/123213 CallInitial tel:+447918880... tel:+447918880... 2007-01-09 11:45:20

502 CallNotTerminated


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RECENT CALLSHTTP GET http://example.com/calls/feed


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! 200 OK

Content-Type: application/atom+xml

Phonebox Calls2007-01-0911:45:02ZPhoneboxtag:example.com,2007-01-09:/calls

Call 1234567tag:example.com/calls/1234567-200701091223313CallInformation2005-10-13T18:30:02Z

CONTENTHTTP GET:


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Accept: application/weatherml+xml; q=1.0,application/xml; q=0.8,text/html; q=0.5

Apache Server .htaccess:AddType application/weatherml+xml weaOptions +MultiViews

./index.wea

./index.xml

./index.html

CACHING


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HTTP GET http://flickr.com/photos/psd/2450160If-Modified-Since: Fri, 31 Dec 1999 23:59:59 GMTIf-None-Match: 'guid-21343244324'

!

HTTP/1.1 412 Precondition Failed

OVERALL ..


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http://example.com/callshttp://example.com/calls/feedhttp://example.com/user/paul/calls/feedhttp://example.com/user/paul/calls/7d6374da5http://example.com/user/paul/calls/search?callingParty=tel:%3A44791888http://example.com/smshttp://example.com/sms/feedhttp://example.com/user/fred/sms/7d6374da5http://example.com/user/fred/sms/inbox/feedhttp://example.com/user/fred/sms/inbox/7d6374da5http://example.com/user/fred/sms/inbox?search?from=tel:%3A44791888

....


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BROWSERFRIENDLY


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JUST ONTHE WEB


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Java


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Rub

. JavaPythonPerl

WLATom


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Locate

Dick'sApplication

Harry

AUTHENTICATION


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TRUST!

IDENTITYFEDERATION


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XSLT


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AJAXXSLT


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YAGNI


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UESTIONS

is the web "good enough" for web services?

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