Initial commit, state from 36C3
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commit
e1be1c5f08
4 changed files with 134 additions and 0 deletions
2
.gitignore
vendored
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.gitignore
vendored
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*.pyc
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**/__pycache__
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escpos.service
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escpos.service
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[Unit]
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Description=ESC/POS Print Job Submission Web Interface
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After=multi-user.target
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[Service]
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Environment=PYTHONUNBUFFERED=1
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ExecStart=/home/escpos/escpos/venv/bin/python3 /home/escpos/escpos/__main__.py
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User=escpos
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WorkingDirectory=-/home/escpos/escpos
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AmbientCapabilities=CAP_NET_BIND_SERVICE
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NoNewPrivileges=true
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[Install]
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WantedBy=multi-user.target
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0
escpos/__init__.py
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0
escpos/__init__.py
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escpos/__main__.py
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escpos/__main__.py
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from bottle import run, get, post, request
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from threading import Lock, Event, Thread
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from queue import Queue
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import serial
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import cgi
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import copy
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import sys
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# DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
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# Version 2, December 2004
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#
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# Copyright (C) 2019, SPiNNiX
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# Everyone is permitted to copy and distribute verbatim or modified
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# copies of this license document, and changing it is allowed as long
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# as the name is changed.
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#
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# DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
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# TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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#
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# 0. You just DO WHAT THE FUCK YOU WANT TO.
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lock = Lock()
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queue = Queue()
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stop_event = Event()
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TEMPLATE='''
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<!DOCTYPE html>
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<html>
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<head>
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<title>Toilet Paper as a Service</title>
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<meta charset="utf-8">
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</head>
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<body>
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<h1>TPaaS - Toilet Paper as a Service</h1>
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<h2>Submit Print Job</h2>
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<form action="/" method="post">
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Give your print job a name: <input name="printjob" /><br/>
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<textarea name="txt" cols="44" rows="22"></textarea><br/><br/>
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<input name="action" value="wrap" type="submit" />
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<input name="action" value="cut" type="submit" />
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<input name="action" value="test" type="submit" />
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</form><br/>
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A single line on toilet paper is up to 44 characters long.<br/>
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There are three print modes:
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<ul>
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<li><tt>wrap</tt>: Lines longer than 44 characters are wrapped.</li>
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<li><tt>cut</tt>: Only the first 44 characters of each line are printed.</li>
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<li><tt>test</tt>: Prints a special test message.</li>
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</ul>
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Pick up your print at <a href="https://36c3.c3nav.de/l/c:0:482.75:484.16/">CCC-CH assembly</a>.
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<h2>Print Queue</h2>
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<ol>
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{printqueue}
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</ol>
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</body>
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</html>
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'''
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@get('/')
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def home():
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with queue.mutex:
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q = copy.copy(queue.queue)
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items = [f'{" "*12}<li>{x[0]}</li>\n' for x in q]
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return TEMPLATE.format(printqueue=''.join(items))
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@post("/")
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def web():
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action = 'wrap'
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if request.forms.action in ['wrap', 'cut', 'test']:
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action = request.forms.action
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content = request.forms.get("txt") or ''
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name = cgi.html.escape(request.forms.get("printjob") or '')
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queue.put((name, content, action))
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return home()
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def prt():
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with serial.Serial("/dev/ttyUSB0", 19200, xonxoff=True) as s:
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print('tty opened', file=sys.stderr)
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while not stop_event.is_set():
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name, content, action = queue.get()
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print(f'now printing: {name}', file=sys.stderr)
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if action == 'wrap':
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output = ''
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for line in content.split("\r\n"):
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while len(line) > 44:
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l, line = line[0:44], line[44:]
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l = l or ' '
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output += f'{" "*22}{l}\n'
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line = line or ' '
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output += f'{" "*22}{line}\n'
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nln = len([1 for x in output.split("\n")])
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print(f'Printing {nln} lines in wrap mode', file=sys.stderr)
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s.write(output.encode('cp437', errors='ignore'))
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elif action == 'cut':
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output = ''
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for line in content.split("\r\n"):
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line = line or ' '
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output += f'{" "*22}{line[0:44]}\n'
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nln = len([1 for x in output.split("\n")])
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print(f'Printing {nln} lines in wrap mode', file=sys.stderr)
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s.write(output.encode('cp437', errors='ignore'))
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elif action == 'test':
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print('Printing hello world', file=sys.stderr)
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s.write(f'{" "*22}HELLO, 36C3 - TOILET PAPER EXHAUSTION\n'.encode('cp437', errors='ignore'))
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def main():
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t = Thread(target=prt)
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t.start()
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run(host='0.0.0.0', port=80, debug=True)
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if __name__ == '__main__':
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main()
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