http://docs.oasis-open.org/ws-dd/discovery/1.1/os/wsdd-discovery-1.1-spec-os.html

Implement SOAP-over-UDP Appendix 1
http://specs.xmlsoap.org/ws/2004/09/soap-over-udp/soap-over-udp.pdf

• unicast retransmission
• multicast retransmission
• duplicate messages detection

I have been updating a scanner Web GUI that I made for several models of orphaned scanners thanks to a command line binary. Recently I added eSCL/AirScan support, meaning that it can take advantage of and now use eSCL Scanners. Not only that . It should also allow the orphaned scanners to be available via AirScan (by way of the Linux host). The scanner web GUI offers some quick edit tools (imagemagick) like Grayscale. PDF (the orphaned scanners only to JPG in color), and a cropping tool by way of jcrop. Aside from the quickedit tools the latest version integrates Tui Image Editor. I figure I am in the testing Phase for scanner compatibility. I know there are remaining issues elsewhere they are just things That I need to deal with after making way for GUI changes and eSCL .

What I need to say is that this project is interesting . It is similar to those that originally had me interested in eSCL but in the case of eSCL I did not find any python projects that were actually mature enough. They all had issues, and I ended up writing it all in php. So if I implemented this to my Web GUI project for a WSD scanner (that did not support eSCL/AirScan), my Web GUI could also make it available as an AirScan scanner.

I am also interested in going the other way too however and have an orphaned or eSCL scanner be abailable as a WSD device if that is even possible. I do not believe that there is any WSD advertising available in linux yet.

For now I wish you luck and hope you have great success and can do broad testing , as I do not have a WSD scanner to test with . Using your python code would make it a no-brainer.

I do not understand why the Linux SANE projects lag so far behind when it comes to new scanner technology and why the support is so limited. they do a wonderful job on USB, Parallel, and Net scanners why did they never implement the ability to use an external command line at all? I hope that the Fred, Wilma, Barney and Betty at the SANE project wake up soon so they can get from the Flintstones to the Jetsons . Airscan has been on OSX and iOS for years now and SANE still has not woke up to it.

• fallback to epRefAddr to obtain a network-resolvable URI if no XAddrs present

if the value of this element is not a network-resolvable transport address, such transport address(es) are conveyed in a separate d:XAddrs element

• support discovery proxies

Clients listen for this signal that one or more DP are available, and for subsequent searches, Clients do not send Probe and Resolve messages multicast but instead unicast directly to one or more DP whilst ignoring multicast Hello and Bye from Target Services.

• Check application instance ID and sequence ID (and discard older messages??)
• Update information in database only if MetadataVersion has changed

I would like to see the day SANE is the default scanner server for linux, mac and windows. Sane's net backend and the Airsane front end make it possible to serve Linux and Mac clients right now. Would your work allow Windows clients to scan (via WS-Scan) from a Sane server? IOW, expose the SANE scanners as WSD Scan devices on a network?

I tried to run the demo code in wsd_scan_operations but init function is not found in wsd_common

Traceback (most recent call last):
  File "/home/acosta/Projects/scanner/WSD-python/src/PyWSD/wsd_scan__operations.py", line 329, in <module>
    __demo()
  File "/home/acosta/Projects/scanner/WSD-python/src/PyWSD/wsd_scan__operations.py", line 288, in __demo
    wsd_common.init()
AttributeError: module 'PyWSD.wsd_common' has no attribute 'init'

I would like to test it but can only invest minimal effort. Can you provide a small code snippet for scanning? Or even better provide a simple command-line interface?

We corresponded about eSCL to WSD bridge

I was wondering if you ever worked on it at all

If I had better understanding of the WSD protocol I could do it in PHP but so little info on real world WSD it seems. Some of your links to Microsoft are now dead too.

I already have a good handle on eSCL and have PHP doing a lot of the work , see http://scannershare.com .

Ideally my goal would be to use a a bridge on Windows with eSCL scanners, with the bridge translating to WSD to communicate with Windows.

Mark

Detect the interface through which a target may be reached, and use it in ipv6 URIs.

eg.
http://[fe80:::::%eth0]:80/