Experimental communication tools (televex screen + televex print)
https://televex.vvvvvvaria.org/
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131 lines
2.8 KiB
131 lines
2.8 KiB
# https://github.com/python-escpos/python-escpos
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# https://python-escpos.readthedocs.io/en/latest/
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import sys
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import os
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import re
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import flask
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from flask import request
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import flask_apscheduler
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import urllib
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import json
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from datetime import date, datetime
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from escpos.escpos import Escpos
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from escpos import printer
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# Create the application.
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APP = flask.Flask(__name__)
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# Connect to the printer
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# Get the printer's USB initializing code with $ sudo lsbusb
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lp = printer.Usb(0x4b8,0xe15)
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buffer = printer.Dummy()
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# Define the JSON databased for storing printed items
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db = 'printed.json'
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if not os.path.exists(db):
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with open(db, 'w') as f:
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f.write(json.dumps({ "printed" : [] }, indent=4))
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# Check the Multifeeder regulary (every 10 min)
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# https://github.com/viniciuschiele/flask-apscheduler
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# Thanks Crunk for pointing to this extention!
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scheduler = flask_apscheduler.APScheduler()
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scheduler.api_enabled = False
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scheduler.init_app(APP)
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scheduler.start()
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def update_db(item):
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try:
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items = json.loads(open(db).read())
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except:
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# Hmm ...
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items = { "printed" : [] }
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if item not in items['printed']:
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new_item = True
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with open(db, 'w') as out:
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items['printed'].append(item)
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out.write(json.dumps(items, indent=4))
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out.close()
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else:
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new_item = False
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return new_item
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def html2plain(html):
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plaintext = re.sub('<[^<]+?>', '', html)
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return plaintext
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@scheduler.task('interval', id='check', minutes=10)
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def check():
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try:
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url = 'https://multi.vvvvvvaria.org/API/latest/10'
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response = urllib.request.urlopen(url).read()
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feed = json.loads(response)
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except:
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feed = []
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for post in feed:
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# add post to database
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year = post['published_parsed'][0]
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month = post['published_parsed'][1]
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day = post['published_parsed'][2]
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post_date = date(year, month, day)
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post_date_str = post_date.strftime('%Y-%m-%d')
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plaintext = html2plain(post['summary'])
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item = {
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'source' : post['feed_details']['rss'],
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'date' : post_date_str,
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'printed' : plaintext
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}
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new_item = update_db(item)
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# add RSS post to printing buffer
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if new_item == True:
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buffer.text(plaintext)
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buffer.cut()
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break
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# print
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lp._raw(buffer.output)
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@APP.route('/print/', methods=['GET', 'POST'])
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def print():
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plaintext = request.args.get('printing', '')
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if plaintext:
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# add plaintext to printing buffer
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buffer.text(plaintext)
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buffer.cut()
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# add plaintext to database
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date = datetime.now()
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date_str = date.strftime('%Y-%m-%d_%H-%M-%S')
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item = {
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'source' : 'TeleVex',
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'date' : date_str,
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'printed' : plaintext
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}
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update_db(item)
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# print
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lp._raw(buffer.output)
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return flask.render_template('index.html')
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@APP.route('/printed/', methods=['GET', 'POST'])
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def printed():
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items = json.loads(open(db).read())
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return flask.render_template('printed.html', items=items)
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if __name__ == '__main__':
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APP.debug=True
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APP.run(port=5000)
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