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Subject: Re: [ws-dd] Issue 024 - DPWS - R1013 and R1015 should clarify directeddiscovery


I think the reference to ad-hoc in the proposed resolution is somewhat 
misleading. Refering only to Probe messages should be enough.

Cheers

Antoine

Ram Jeyaraman a écrit :
>
> This issue is assigned the number 024. For further discussions on this 
> issue, please refer to this issue number or use this thread.
>
> *From:* Dan Driscoll
> *Sent:* Wednesday, September 17, 2008 9:32 AM
> *To:* Ram Jeyaraman
> *Subject:* NEW Issue - DPWS - R1013 and R1015 should clarify directed 
> discovery
>
> Please defer discussions on this issue until a time this issue is 
> accepted and is assigned a number.
>
> *Description:*
>
> DPWS Section 4 (Discovery) describes a method of sending WS-Discovery 
> messages over an HTTP connection. This request/response exchange is 
> not described in WS-Discovery, and does not conform to the SOAP 1.2 
> HTTP binding.
>
> A proposed issue in WS-Discovery (Issue 022) adds a request/response 
> MEP for communicating to discovery proxies that is similar in 
> functionality to this exchange.
>
> Additionally, the specification is unclear about the HTTP addresses at 
> which a device must support receiving this Probe message.
>
> *Proposed Resolution:*
>
> DPWS should reuse the WS-Discovery request/response proxy pattern for 
> use with directed discovery to a known HTTP endpoint.
>
> · R1015 should require devices to implement the “proxy” side of the 
> proposed WS-Discovery request/response pattern. R1015 should also 
> require that devices support receiving a directed Probe at any HTTP 
> addresses where the device endpoint is available. The supporting text 
> should clarify that the device may also accept these Probes at other 
> locations.
>
> /R1015: A DEVICE MUST support receiving an ad-hoc Probe SOAP ENVELOPE 
> as an HTTP Request at any HTTP addresses where the DEVICE endpoint is 
> available./
>
> / /
>
> Clients may query a known HTTP endpoint for devices by sending an 
> ad-hoc WS-Discovery Probe message in the HTTP request/response pattern 
> described in WS-Discovery section xxx.
>
> / /
>
> · R1021 and R1022 should be updated to match the request/response pattern.
>
> /R1021: If a DEVICE matches a Probe SOAP ENVELOPE received as an HTTP 
> Request, it MUST send a Probe Match SOAP ENVELOPE in the HTTP Response./
>
> / /
>
> /R1022: If a DEVICE does not match a Probe SOAP ENVELOPE received as 
> an HTTP Request, it MUST send a Probe Match SOAP ENVELOPE in the HTTP 
> Response with no ProbeMatch sections in the SOAP body./
>
> · Add the following clarifying text at the end of section 4:
>
> How the CLIENT obtains the DEVICE HTTP address is not defined in this 
> specification, and this HTTP address does not necessarily relate to 
> HOSTED SERVICE addresses.
>
> ------------------------------------------------------------------------
>
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>   


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