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SOAP

SOAP. Ashish V. Tendulkar Directory Database integration group (www.eusersolutions.com) Persistent Systems Pvt. Ltd. Pune (www.pspl.co.in). Outline. The problem.. Why XML? Why HTTP? XML+HTTP = SOAP SOAP Details Uses of SOAP Example. The problem. Proxy Server . Server .

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SOAP

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  1. SOAP Ashish V. Tendulkar Directory Database integration group (www.eusersolutions.com) Persistent Systems Pvt. Ltd. Pune (www.pspl.co.in)

  2. Outline • The problem.. • Why XML? • Why HTTP? • XML+HTTP = SOAP • SOAP Details • Uses of SOAP • Example

  3. The problem.. Proxy Server Server Client App. Application Server Firewall

  4. Implications • Industry not shifted completely to either one • Vendor specific • Lack of interoperability • Require high-tech runtime environment

  5. Why XML? • Simple text markup language • Platform, language and vendor agnostic • Easily extensible • Capable of solving interoperability problem

  6. Why HTTP? • Ubiquitous • Supported by every web browser and server • Effective technology for transferring text, graphics and other information

  7. XML + HTTP = SOAP • HTTP is used for transport • XML as encoding scheme • Endpoint HTTP based URL for the target • Object mapping: implementation specific

  8. SOAP call anatomy

  9. HTTP Headers SOAP method name SOAP Envelope SOAP Header SOAP Body SOAP Component Object Endpoint ID Method/Interface ID Extension Headers Parameter Data Call element

  10. Uses of SOAP • SOAP greatly simplifies data exchange in B2B application over extranet • Enables web site to integrate services from other sites • Remote scripting more prevalent with SOAP • Non-browser client could seamlessly access a service across web

  11. Example Message POST /string_server/Object17 HTTP/1.1 Host: 209.110.197.2 Content-Type: text/xml Content-Length: 152 SOAPMethodName: urn:strings-com:IString#reverse <Envelope> <Body> <m:reverse xmlns:m='urn:strings-com:IString'> <theString>Hello, World</theString> </m:reverse> </Body> </Envelope>

  12. Example Response 200 OK Content-Type: text/xml Content-Length: 162 <Envelope> <Body> <m:reverseResponse xmlns:m='urn:strings- com:IString'> <result>dlroW ,olleH</result> </m:reverseResponse> </Body> </Envelope>

  13. Conclusion • SOAP is platform independent, language neutral protocol • SOAP does not replace COM and CORBA • SOAP works in place of DCOM and IIOP • SOAP does not pose huge security risks • Supports interoperation between different vendor specific implementations

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