add printservant support

Dockerfile

@@ -1,9 +1,5 @@
 FROM ruby:3.0
 
-RUN apt-get update && \
-    apt-get install -y cups-ipp-utils && \
-    rm -rf /var/lib/apt/lists/*
-
 # throw errors if Gemfile has been modified since Gemfile.lock
 RUN bundle config --global frozen 1
 

README.md

@@ -10,4 +10,4 @@ try it out:
 GET http://localhost:4567/api/2/preview.pdf?id=abcdef&name=ItemName&owner=OptionalOwner
 POST http://localhost:4567/api/2/print?id=abcdef&name=ItemName&owner=OptionalOwner
 
-Make sure to pass either `LABELMAKER_LOCAL_PRINTER_NAME` or `LABELMAKER_IPP_PRINTER_URL`. See top of `main.rb` for all env variables available.
+Make sure to pass a printer env. See top of `main.rb` for all env variables available.

main.rb

@@ -15,9 +15,10 @@ CODE_PREFIX = ENV.fetch('LABELMAKER_CODE_PREFIX', 'https://inventory.hackerspace
 # ZEBRA_LABEL_SIZE = [100, 60]
 LABEL_SIZE = JSON.parse(ENV.fetch('LABELMAKER_LABEL_SIZE', '[89, 36]'))
 
-# NOTE: You can use either local printer or IPP printer, but not both
-LOCAL_PRINTER_NAME = ENV.fetch('LABELMAKER_LOCAL_PRINTER_NAME', 'DYMO_LabelWriter_450')
+# NOTE: You can use only one of these: local printer, IPP printer, or printservant
+LOCAL_PRINTER_NAME = ENV.fetch('LABELMAKER_LOCAL_PRINTER_NAME', '')
 IPP_PRINTER_URL = ENV.fetch('LABELMAKER_IPP_PRINTER_URL', '')
+PRINTSERVANT_URL = ENV.fetch('LABELMAKER_PRINTSERVANT_URL', '')
 
 def render_label()
   short_id = params[:id]
@@ -87,6 +88,9 @@ post '/api/2/print' do
     system("lpr -P #{LOCAL_PRINTER_NAME.shellescape} #{temp.path.shellescape}", exception: true)
   elsif not IPP_PRINTER_URL.empty?
     system("ipptool -v -tf #{temp.path.shellescape} -d filetype=application/octet-stream -I #{IPP_PRINTER_URL.shellescape} ipptool-print-job.test", exception: true)
+  elsif not PRINTSERVANT_URL.empty?
+    # lmao
+    system("curl -i -XPOST --data-binary '@#{temp.path.shellescape}' #{PRINTSERVANT_URL.shellescape}", exception: true)
   else
     status 404
     return "No printer configured"