Hi all, I found http://ws4d.org/dpws-explorer/ . It has a linux version, it can help a bit with device detection and browse properties while developing a proper scan software. Here <https://sourceforge.net/projects/ws4d-javame/> is a java implementation of the DPWS standard, and here <http://trac.e-technik.uni-rostock.de/projects/ws4d-gsoap> a C/C++ one.
However, I found another batch of documentation of the standard, so developing a simple working implementation targeted mainly to scan capabilities isn't going to be difficult. The C/C++ library posted above might be not suitable for sane backend implementation, I don't think sane devs would allow adding such a large gen-purpose dependency to codebase, and a lightweight implementation is better IMHO. Il giorno mar 6 feb 2018 alle ore 00:05 Patrick Roncagliolo < ronca....@gmail.com> ha scritto: > Hi, > > you can find a basic implementation of a WSD discovery scanner here: > https://github.com/roncapat/WSD-python > > Here is a sample output (it detects a response from my MB2350): > > EndPoint Reference Address: > urn:uuid:00000000-0000-1000-8000-f4813944662e > Implemented Types: > wsdp:Device > wprt:PrintDeviceType > wscn:ScanDeviceType > Transport addresses: > http://192.168.1.5:80/wsd/pnpx-metadata.cgi > > Basically, it retrieves an unique identifier, the capabilities of the > devices (MB2350 is both printer and scanner), and an HTTP address for later > use. > More coming. Understanding the protocol with an easy language as Python > with no API constraints helps to bootstrap a working implementation, but > ideally the next step would be a true backend implementation. > > Patrick Roncagliolo > > > Il giorno lun 5 feb 2018 alle ore 16:25 Patrick Roncagliolo < > ronca....@gmail.com> ha scritto: > >> Hi Till, >> WSD came in with Windows Vista IIRC. >> It is HTTP/XML based, so yeah, it works only on network, in fact my canon >> maxify uses an entirely different protocol on USB (similar, if not equal, >> to the BJNP network protocol used by Canon for basic Linux LAN support). >> It defines a discovery protocol, a scan service, a print service, but >> probably there are more, unrelated with the printer/multifunction/scanner >> world (I started today to dig the docs). >> >> By the way, I managed to fix the script found in the github repo I >> linked, and maybe the first step for me to get comfortable with the >> protocol will be to play a bit more from python, extending as much as I can >> the short script as a more complete CLI tool with discovery support and all >> the possible options. Then, I could manage to reimplement the protocol as a >> sane backend, which I think is a bit more hard (I need to study sane api >> first). >> >> Beware I'm a student with not-so-much spare time, but I'm interested in >> learning something new and get my canon working at best, and obviously >> contribute as much as I can. I'd like to add or expand wireshark dissectors >> for WSD and BJNP too. We'll see how much I can do. >> >> NB. if in the coming days I start a github repo for a WSD python >> playground, I'll share here the link. >> >> Here are a few links: >> -WS-Discovery (full spec) >> http://specs.xmlsoap.org/ws/2005/04/discovery/ws-discovery.pdf >> -WS-Print (at the bottom of the page there are links to all print & scan >> XML schemas and tech specifications) >> https://docs.microsoft.com/en-us/windows-hardware/drivers/print/ws-print-v1-1 >> -WS-Print 2.0 (only printing? 3d printers? have no time to check) >> http://go.microsoft.com/fwlink/p/?LinkId=534008 >> >> >> >> >> Il giorno lun 5 feb 2018 alle ore 15:54 Till Kamppeter < >> till.kamppe...@gmail.com> ha scritto: >> >>> On 02/05/2018 01:32 PM, Patrick Roncagliolo wrote: >>> > WDS is a protocol based on http connection with devices such as >>> > scanners, printers and so on. Most of the work is based on a bunch of >>> > XML schemas, that are publicly available on MSDN. Searched a lot, but >>> > for Linux I only found this (https://github.com/al42and/WSDolefuls), >>> > that fails to parse the scanner response, but succeeds to start the >>> scan >>> > job. >>> > I tried to search around SANE for WDS support, but I understood there >>> > isn't. >>> > >>> > Is there a technical motivation behind the lack of support for WDS? or >>> > it's just not the top priority? Could it be possible to create a >>> backend >>> > for this protocol? A lot of Canon printers would work like a charm with >>> > a single good implementation, and I think it would be the same with a >>> > lot of modern hardware. I could try to start a simple implementation if >>> > someone instructs me with the basics of the SANE internal API for >>> > backends and working principles, I'm a student with (not much) free >>> time >>> > and it could be great to help a bit (and learn something) if possible. >>> > >>> >>> This looks like a second driverless (meaning no device/model-specific >>> software or data (aka driver) required) scanning method after PWG's >>> (Printer Working Group, http://www.pwg.org/) IPP Scanning which I >>> mentioned in another post on this list. >>> >>> It seems that WDS exists already for longer time and is already >>> established, so that there are actually several scanners using it. Am I >>> right? Which manufacturers are participating? Does it only work on >>> network devices? Or only on USB? Does it only work on printer/scanner MF >>> devices or also on stand-alone scanners? >>> >>> Patrick, it would be great if you could make a SANE module for that. >>> Another step to making a scanner as easy to connect under Linux as a USB >>> stick. Also great for MF devices which happily print with PWG's >>> driverless IPP printing but do not support IPP scanning. >>> >>> Till >>> >>> -- >>> sane-devel mailing list: sane-devel@lists.alioth.debian.org >>> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel >>> Unsubscribe: Send mail with subject "unsubscribe your_password" >>> to sane-devel-requ...@lists.alioth.debian.org >> >>
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