1	SOAP (not the lathery kind)
2	Sharing Functionality on the Net How do I utilize functionality on the web Amazon.com sells books Many websites provide stock quotes Measurisk.com provides complex risk analysis
3	Current Situation Web Sites and Web Applications have no good way to share functionality Can show a little Amazon functionality in a frame in your website Limited to HTML/XML Branding is an issue Another alternative is tricks like “Screen Scraping”
4	Where is the Functionality Application Business rules implemented in Business Abstraction Layers Objects expose business functionality Objects usually use one of the major object technologies COM CORBA Java Each Object technology uses a defined protocol to communicate with the object
5	Define Protocol From MSDN – A set of semantic and syntactic rules that determine the behavior of functional units in achieving communication. From IMDB - A mediocre movie with Goldie Hawn
6	Problem Most object technologies use binary protocols that are complex COM Corba Java C++ classes in DLL’s
7	Another Problem Security Objects usually run behind the firewall Exposing them directly to the outside world is completely unacceptable
8	Our Dream A beautiful world where Web Applications peacefully share functionality of business abstraction layers A loving protocol where all object technologies can easily communicate in harmony Some way to make a buck off of all that peace and love
9	Attributes of a Good Solution Simple Object Access Protocol
10	Hmmmmm… HTTP is pretty much everywhere Maybe we can come up with some sort of system where someone can call our object using HTTP
11	Demo Ad Hoc HTTP Object Sharing
12	Calculator Object CalculatorLib.Calculator Add Subtract Multiply Divide
13	Now we have Object exposed through HTTP Incoming requests can be checked using any security system currently in place for the web system We’ve defined Biff’s Ultimately Reasonable Protocol
14	Drawbacks We have to write a separate ASP page for each object Potential clients must know about our object and paste together the correct HTTP request It’s not a very marketable acronym
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16	Let’s standardize This will allow the development of tools that will handle mechanics of the client and server side We need a flexible way to send structured data in a textual format to the server
17	SOAP is just like what we did SOAP’s XML schema are a solution to the problem – not the solution to the problem The SOAP guys did about what I did They spent a lot more time on it They are a lot smarter than me
18	Highlights of the SOAP schema - Call
19	Highlights of the SOAP schema - Call
20	Highlights of the SOAP schema - Call <SOAP-ENV:Envelope> <SOAP-ENV:Header> </SOAP-ENV:Header> <SOAP-ENV:Body xmlns:pmtcalc=“urn:schemas-gautw1-com:Calc”> <Calc:Add> <Op1>6</Op1> <Op2>4</Op2> </Calc:Add> </SOAP-ENV:Body> </SOAP-ENV:Envelope
21	Higlights of the SOAP schema - Response <SOAP-ENV:Envelope> <SOAP-ENV:Header> </SOAP-ENV:Header> <SOAP-ENV:Body xmlns:pmtcalc=“urn:schemas-gautw1-com:Calc”> <Calc:AddResponse> <return>10</return> </Calc:AddRsponse> </SOAP-ENV:Body> </SOAP-ENV:Envelope>
22	Other Issues How do I tell the world what I can do and what I expect (a la COM Type Libraries) Security
23	WSDL “Type Libraries” for Web Services XML definition of available functionality Note – no longer SDL
24	WSDL Details
25	WSDL Details
26	Security Authentication Anonymous Basic Challenge Certificates Authorization ACL Directories Encryption SSL Certificates
27	.NET Demo
28	SOAP Toolkit 2.0 Works with VS 6.0 Contents Client Side COM Object for assembling XML SOAPSerializer Server Side COM Object for processing XML SOAPClient WSDL Generator (w/WSML) Additional COM Objects
29	Performance Warning – Values not scientific DCOM Calculator calls – 75 / sec SOAP Calculator calls – 5 / sec
30	SOAP Toolkit – When and Where Beta 1 - Now msdn.microsoft.com/downloads Under Software Development Kits Beta 2 - 2/28/01 RTM - 3/30/01
31	Resources www.w3c.org (SOAP Spec) Understanding SOAP, SAMS Press SOAP Toolkit 2.0 .NET Documentation
32	Questions
33	SOAP
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