forked from CCCHH/nix-infra
June
c97f169b77
Add and configure a print server for the Brother P-touch QL 500 label printer, so that it can be easily used via SSH. Do the following to make that work: - Configure the print server host. - Package printer-driver-ptouch to have a working driver for the label printer. - Configure CUPS. - Add a script "forcecommand-lpr-wrapper", which works together with the ForceCommand sshd_config option and wraps lpr to provide an easy interface to use the Brother QL 500 label printer via SSH. - Add a print user and configure SSH to have the "forcecommand-lpr-wrapper" script accessible without a password using the print user via SSH.
85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
#!/usr/bin/env python3
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# A script for usage with the ForceCommand sshd_config option.
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# It calls lpr with some standard arguments, but also parses
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# SSH_ORIGINAL_COMMAND to potentially provide a different set of arguments to
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# lpr.
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#
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# This wrapper is written for interacting with the Brother QL 500 label printer.
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#
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# The following options can be provided as an SSH command and this script will
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# then pass them to the lpr call: <MediaType> <PageSize>
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# - MediaType can be one of:
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# - Labels
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# - Tape (this is the default)
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# - PageSize can be one of:
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# - 12mm
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# - 12mm-circular
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# - 17x54mm
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# - 17x87mm
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# - 23x23mm
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# - 24mm-circular
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# - 29mm
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# - 29x90mm
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# - 38mm
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# - 38x90mm
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# - 50mm
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# - 54mm
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# - 58mm-circular
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# - 62mm
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# - 62x29mm
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# - 62x100mm
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# - Custom.WIDTHxHEIGHT (with WIDTH and HEIGHT needing to be either one to
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# three digits)
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# - label-wide (this being a convenience alias for Custom.62x35mm and it also
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# being the default)
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# - label-item (this being a convenience alias for 38x90mm)
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#
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# So using these options in a complete setup would look like this for example:
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# cat label-item.pdf | ssh print@ptouch-print-server.z9.ccchh.net labels label-item
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# This being equivalent to:
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# cat label-item.pdf | ssh print@ptouch-print-server.z9.ccchh.net Labels 38x90mm
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#
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# The options are case-insensitive.
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#
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# The options are derived from: lpoptions -p Brother-QL-500 -l
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import os, re, subprocess
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mediaType = "Tape"
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pageSize = "Custom.62x35mm"
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def parseGivenOptions():
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givenOptionsString = os.environ["SSH_ORIGINAL_COMMAND"]
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givenOptionsIterator = iter(givenOptionsString.split(" "))
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givenMediaType = next(givenOptionsIterator, "")
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givenPageSize = next(givenOptionsIterator, "")
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global mediaType
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if givenMediaType.lower() == "labels":
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mediaType = "Labels"
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elif givenMediaType.lower() == "tape":
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mediaType = "Tape"
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global pageSize
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pageSizeRegex = re.compile(r"^((12mm(-circular)?)|(24mm-circular)|(58mm-circular)|(((17x(54|87))|(23x23)|((29|38)(x90)?)|(62x(29|100))|50|54|62)mm))$", re.ASCII | re.IGNORECASE)
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pageSizeMatch = pageSizeRegex.match(givenPageSize)
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pageSizeCustomRegex = re.compile(r"^custom\.(\d{1,3})x(\d{1,3})$", re.ASCII | re.IGNORECASE)
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pageSizeCustomMatch = pageSizeCustomRegex.match(givenPageSize)
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if givenPageSize.lower() == "label-wide":
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pageSize = "Custom.62x35mm"
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elif givenPageSize.lower() == "label-item":
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pageSize = "38x90mm"
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elif pageSizeMatch:
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pageSize = givenPageSize.lower()
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elif pageSizeCustomMatch:
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width = pageSizeCustomMatch.group(1)
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height = pageSizeCustomMatch.group(2)
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pageSize = "Custom.{}x{}".format(width, height)
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if "SSH_ORIGINAL_COMMAND" in os.environ:
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parseGivenOptions()
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subprocess.run(["lpr", "-P", "Brother-QL-500", "-o", "MediaType={}".format(mediaType), "-o", "PageSize={}".format(pageSize)])
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