SOAP 1.2, MTOM and their applications

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1 SOAP 1.2, MTOM and their applications Hervé Ruellan Canon Research Centre France 1

2 Agenda SOAP 1.2 XOP, MTOM and Resource Header Canon 2

3 SOAP 1.2 3

4 SOAP Background Web success Easy information sharing Built on HTML and HTTP Logical evolution: applications over the web Loose coupling Use XML and HTTP 4

5 SOAP 1.2 Standard Standardization process W3C Working Group From September 2000 to June 2003 Result SOAP Version 1.2 Part 0: Primer SOAP Version 1.2 Part 1: Messaging Framework SOAP Version 1.2 Part 2: Adjuncts 5

6 SOAP 1.2 Messaging Framework 6

7 SOAP Message Transferred between nodes: From a sender To a receiver Through intermediarie(s) Sender Intermediaries Receiver 7

8 SOAP Envelope XML Construct Body For ultimate receiver Header block For any node Processing may be mandatory: mustunderstand Envelope Header block Header block Header block Body 8

9 SOAP Message Processing Main steps: Check message can be processed Find header blocks targeted at the node Look for mustunderstand Process message Process identified header blocks Process body (ultimate receiver) Transmit message Send modified message (intermediary) 9

10 SOAP Fault Failure is indicated by a fault SOAP Fault Contained in Envelope Body Indicates the type of failure May contain: Node where fault happened Application related details 10

11 SOAP Binding Framework SOAP has: Message structure Processing rules To transmit messages another protocol is needed Binding Framework Rules for defining how a protocol is used to transmit SOAP messages 11

12 SOAP Extensibility SOAP Features Extension of the messaging framework Through Processing Model Expressed as Header Block (SOAP Module) Can use mustunderstand Through Binding Framework Expressed using underlying protocol 12

13 SOAP 1.2 Adjuncts 13

14 SOAP RPC Convention for doing RPC Invocation Element with function name in Body Sub-element for each parameter Response Element representing result in Body Sub-element for each parameter 14

15 SOAP Data Model SOAP Encoding SOAP Data Model Mapping convention from application data to XML Used by SOAP RPC SOAP Encoding Serialization rules for Data Model SOAP Part 2 defines an Encoding Other Encoding can be created 15

16 SOAP MEP (Message Exchange Pattern) MEP Template for an exchange of several SOAP messages Provides an abstraction over the underlying protocol MEP defined by standard SOAP Request-Response SOAP Response 16

17 SOAP HTTP Binding Binding of SOAP to HTTP Support two MEPs SOAP Request-Response SOAP Response Support Web Method Feature Use either GET or POST 17

18 XOP, MTOM and Resource Header 18

19 Binary Data in SOAP Problem: including binary data in a SOAP message Need to encode data base64 encoding: 33% size increase XOP: binary data in XML documents MTOM: application of XOP to SOAP 19

20 XOP Introduction XML-binary Optimized Packaging Goal: serialize efficiently XML Infosets containing binary data Uses XOP Package construct for serialization 20

21 XOP Package XML Linked to binary data xop:include element XML and binary data enclosed in XOP Package XOP Package... XML File <x:data> <xop:include href="..."/> </x:data>... Binary File 21

22 XOP Logical View XOP Package... XML File <x:data> <xop:include href="..."/> </x:data>... Binary File XML File... <x:data> d7fefaa7vr0i2vqqsd87 REdqsqZG886DEFlkE35C FDERdrF5RE8df5R= </x:data> Serialization Logical View

23 XOP Advantages At application layer, everything is XML Compatible with legacy applications Efficient XOP-aware applications At serialization layer XOP Package: more compact Can be compatible with legacy XML libraries 23

24 MTOM Message Transmission Optimization Mechanism SOAP Feature for using XOP with SOAP Use MIME Multipart/Related for XOP Package Extension to the HTTP Binding 24

25 Resource Representation Header Block SOAP Feature for including representations of Web resources Representation carried in a Header Block Stored in base64 Designed to optimize when used with MTOM 25

26 Canon 26

27 Canon Net sales: 26 billions Employees: 115,000 Sales by products Cameras Optical and other Office imaging Business information Computer peripherals 27

28 Canon Research Centre France European R&D centre for Canon 70 employees Field of expertise Image processing Networks Internet technologies 28

29 Web Services for copiers Provide extension mechanism Using functionalities from another copier Retrieving resource from a PC 29

30 Web services for cameras Increase communication possibilities Sharing images over the Internet Internet 30

31 Thank you! Question? 31

Lesson 3 SOAP message structure

Lesson 3 SOAP message structure Service Oriented Architectures Security Module 1 - Basic technologies Unit 2 SOAP Ernesto Damiani Università di Milano SOAP structure (1) SOAP message = SOAP envelope Envelope