Re: What Does SOAP/WS Do that A REST System Can't?
> After all the threads on this, I can't remember ever > seeing this question answered. Can someone point me > to a list of the capabilities that one gets using > SOAP/WS* that one won't get using REST? I don't think you'll find anything close to a comprehensive list for two major reasons Its almost as much political as technical The WS-xxx stack is a long way from being done, to say nothing of getting various standards committees working on the parts. If we compare WS-xxx with HTTP (as the most widely deployed example of REST), a few things come to mind, some of which will matter, and some which won't: SOAP supports richer message patterns, including multiple parties processing a message along the way. HTTP proxies might require you to put no-transform in your header to avoid someone converting your message. (14.9.5 of HTTP1.1 spec) -- yuk. In fact, the whole proxy stuff in HTTP plays havoc with your meta-data Speaking of which, SOAP has a place for metadata and a rich set of standards; HTTP has a place (the headers) with problematic standards There is no standard way to RSA-sign a request or a response My biggest problem with REST, the architecture, goes back to a thread Rusty and I had months ago. REST is requires all state to live in the messages exchanged between the two parties, and the only standard way to sign content goes against acceptable security practices -- everything uses your "login" key, as opposed to a session key. Yes, you could define appropriate media types and use of HTTP 40 to effect a state machine and do the right thing, but , err, yuk. :) /r$ -- Rich Salz, Chief Security Architect DataPower Technology http://www.datapower.com XS40 XML Security Gateway http://www.datapower.com/products/xs40.html
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