This is a great project. If it is successful, you will open up a ton of scanners for use with SANE
More importantly, it gives a path for supporting just about ANY windows-only scanner in SANE, as seems windows 10 can export any local scanner via WSD I am assuming you found this documentation? https://docs.microsoft.com/en-us/windows-hardware/design/whitepapers/implementing-web-services-on-devices-for-printing On Tue, Feb 6, 2018 at 11:10 AM, Patrick Roncagliolo <[email protected]> wrote: > 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 < > [email protected]> 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 < >> [email protected]> 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 < >>> [email protected]> 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: [email protected] >>>> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel >>>> Unsubscribe: Send mail with subject "unsubscribe your_password" >>>> to [email protected] >>> >>> > -- > sane-devel mailing list: [email protected] > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to [email protected] >
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