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cyanfish / naps2

Scan documents to PDF and more, as simply as possible.
https://www.naps2.com
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Development issues regarding the use of scanning in escl driver #272

Closed zhangxihuai closed 8 months ago

zhangxihuai commented 8 months ago

Hello. I am currently working on .net6 to build the program, I can use "ScanController. GetDeviceList()" to obtain wia devices in Windows and sane devices in Linux. But I cannot retrieve the device from the "ScanController. GetDeviceList (Driver. Escl)" method, whether it is Windows or Linux. Using in NAPS2 7.2.2, I can obtain devices through the "ESCL Driver"，but my own program cannot do it What should I do? Thanks

cyanfish commented 8 months ago

Try setting ScanningContext.Logger (e.g. NLog, or just implement a basic ILogger with Console.WriteLine or something). ESCL should have some useful debug-level logging.

I'm not sure what the problem would be, maybe something to do with firewall access from your process?

zhangxihuai commented 8 months ago

Thank you for your reply. I have obtained some log information (some information has been replaced with '*'). I‘m not sure if it is what you are looking for. Can these help you locate the problem？

ScanningContext: Trace: TXTRecord HP\032LJ\032Pro\032MFP\03231013***\032(NET)._uscan._tcp.local IN TXT txtvers=1 txtvers=1 Vers=2.0 rs=eSCL "ty=HP LJ Pro MFP 31013*** (NET)" pdl=application/pdf,image/jpeg,image/png uuid=9f70699d-0e99-f199-c026-b275ff9a**** cs=color,grayscale,binary is=platen duplex=F
ScanningContext: Trace: SRVRecord HP\032LJ\032Pro\032MFP\03231013***\032(NET)._uscan._tcp.local IN SRV 0 0 17945 HP\032LJ\032Pro\032MFP\03231013***\032(NET).uscan.local
ScanningContext: Trace: ARecord HP\032LJ\032Pro\032MFP\03231013***\032(NET).uscan.local 120 IN A 192.168.1.157
ScanningContext: Trace: ARecord HP\032LJ\032Pro\032MFP\03231013***\032(NET).uscan.local 120 IN A 192.168.139.1
ScanningContext: Trace: ARecord HP\032LJ\032Pro\032MFP\03231013***\032(NET).uscan.local 120 IN A 192.168.137.1
ScanningContext: Trace: AAAARecord HP\032LJ\032Pro\032MFP\03231013***\032(NET).uscan.local 120 IN AAAA fe80::6eac:5169:2c6:902f
ScanningContext: Trace: AAAARecord HP\032LJ\032Pro\032MFP\03231013***\032(NET).uscan.local 120 IN AAAA fe80::d82f:2d8b:a8ea:8b71
ScanningContext: Trace: AAAARecord HP\032LJ\032Pro\032MFP\03231013***\032(NET).uscan.local 120 IN AAAA fe80::7edb:ea8:17ca:6204
ScanningContext: Trace: TXTRecord HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscans._tcp.local CLASS32769 TXT txtvers=1 adminurl=http://HP38CA84A5****.local. note= UUID=97547462-d241-48e4-adb1-3258649a**** vers=2.63 representation=images/printer.png rs=eSCL "ty=HP LaserJet Pro MFP 3101-3***" pdl=application/octet-stream,application/pdf,image/jpeg cs=binary,color,grayscale is=platen,adf duplex=F mopria-certified-scan=1.3 usb_MFG=HP
ScanningContext: Trace: TXTRecord HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscan._tcp.local CLASS32769 TXT txtvers=1 adminurl=http://HP38CA84A5****.local. note= UUID=97547462-d241-48e4-adb1-3258649a**** vers=2.63 representation=images/printer.png rs=eSCL "ty=HP LaserJet Pro MFP 3101-3***" pdl=application/octet-stream,application/pdf,image/jpeg cs=binary,color,grayscale is=platen,adf duplex=F mopria-certified-scan=1.3 usb_MFG=HP
ScanningContext: Trace: ARecord HP38CA84A5****.local 120 CLASS32769 A 192.168.1.222
ScanningContext: Trace: AAAARecord HP38CA84A5****.local 120 CLASS32769 AAAA fe80::3aca:84ff:fea5:7f97
ScanningContext: Trace: SRVRecord HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscans._tcp.local 120 CLASS32769 SRV 0 0 443 HP38CA84A5****.local
ScanningContext: Trace: SRVRecord HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscan._tcp.local 120 CLASS32769 SRV 0 0 8080 HP38CA84A5****.local
ScanningContext: Trace: NSECRecord HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscans._tcp.local CLASS32769 NSEC HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscans._tcp.local TXT SRV
ScanningContext: Trace: NSECRecord HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscan._tcp.local CLASS32769 NSEC HP\032LaserJet\032Pro\032MFP\0323101-3***\032[A57F97]._uscan._tcp.local TXT SRV
ScanningContext: Trace: NSECRecord HP38CA84A5****.local 120 CLASS32769 NSEC HP38CA84A5****.local A AAAA
引发的异常:“System.InvalidOperationException”(位于 AvaloniaApplicationNet6.dll 中)
No scanner available: List<ScanDevice>.Count = 0
cyanfish commented 8 months ago

Thanks, it looks like there's an error that's not logged properly, can you try the latest SDK version (0.2.3) and collect the same logs again?

cyanfish commented 8 months ago

Closing for now, feel free to comment again if you need more help.