/
kiosk_server.py
410 lines (350 loc) · 12.6 KB
/
kiosk_server.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
# -*- coding: utf-8 -*-
import os
import re
import sys
import json
import cups
import serial
import atexit
import logging
import argparse
import datetime
from signal import SIGTERM
from wsgiref.simple_server import make_server
from webob import Request, exc
from time import sleep
from multiprocessing import Process, Queue
from essp_api import EsspApi
RESP_HEADERS = [('Access-Control-Allow-Origin', '*')]
LPR_PATH = '/usr/bin/lpr'
PRINTER_NAME = 'CUSTOM_Engineering_VKP80'
LOG_FILE = '/tmp/kiosk_server.log'
CHECKS_DIR = '/tmp/'
BIND_PORT = 8080
BIND_ADDRESS = '127.0.0.1'
HOLD_AND_WAIT_ACCEPT_CMD = False
CHECK_TEMPLATE = u'''
"Sistema" ltd ИНН:1401552291
Терминал No 4565
ул.20 Января 6
{date}
Наличные за услугу
Доступ в Интернет
Имя клиента : {fio}
Логин: {login}
Получено: {credit} azn
Операция No: {order_id}
Просьба не выбрасывать чек до
поступления средств на ваш счёт
Тел :012 4081498
График с 10.00-18.00
http://sistema.az
'''
class SerialMock(object):
POLL_CMD = ('7f0001071188'.decode('hex'), '7f8001071202'.decode('hex'))
def __init__(self, *args, **kwargs):
self.response = ''
self.poll_count = 0
self.sent = ''
def write(self, data):
self.sent = data
if data in self.POLL_CMD:
self.poll_count += 1
if self.poll_count == 2:
self.response = '7f8003f0ef00cfca'
return
if self.poll_count == 3:
self.response = '7f8003f0ef04d44a'
return
if self.poll_count == 4:
self.response = '7f0004f0ee04cce0d6'
return
self.response = '7f8001f02380'
def read(self, count=None):
res = self.response[0:count*2]
self.response = self.response[count*2:]
return res.decode('hex')
def inWaiting(self):
return len(self.response)
class App(object):
def __init__(self, params):
self.params = params
self.child = None
self.routes = []
self.queue_request = Queue()
self.queue_response = Queue()
@staticmethod
def _template_to_regex(template):
regex = ''
last_pos = 0
var_regex = re.compile(r'\{(\w+)(?::([^}]+))?\}', re.VERBOSE)
for match in var_regex.finditer(template):
regex += re.escape(template[last_pos:match.start()])
var_name = match.group(1)
expr = match.group(2) or '[^/]+'
expr = '(?P<%s>%s)' % (var_name, expr)
regex += expr
last_pos = match.end()
regex += re.escape(template[last_pos:])
regex = '^%s$' % regex
return regex
def add_route(self, template, view, **kwargs):
self.routes.append((re.compile(self._template_to_regex(template)), view, kwargs))
def __call__(self, environ, start_response):
if not self.child or not self.child.is_alive():
self.child = Process(
target=note_acceptor_worker,
args=(self.queue_request, self.queue_response, self.params)
)
self.child.daemon = True
self.child.start()
req = Request(environ)
for regex, controller, kwvars in self.routes:
match = regex.match(req.path_info)
if match:
req.urlvars = match.groupdict()
req.urlvars.update(kwvars)
res = json.dumps(controller(req))
headers = RESP_HEADERS[:]
headers.append(('Content-Length', str(len(res))),)
start_response('200 OK', headers)
return [res]
return exc.HTTPNotFound()(environ, start_response)
def index(self, req):
return 'ok'
def simple_cmd(self, req):
cmd = req.urlvars['cmd']
self.queue_request.put({'cmd': cmd})
return 'ok'
def poll(self, req):
data = []
while True:
try:
data.append(self.queue_response.get(block=False))
except Exception:
break
return data
def print_check(self, req):
data = {
'date': datetime.datetime.now().strftime('%d.%m.%Y'),
}
data.update(req.POST)
try:
check = CHECK_TEMPLATE.format(**data)
except:
return 'input data error'
filename = '%s%s' % (CHECKS_DIR, data['order_id'])
try:
f = open(filename, 'w+')
except:
return 'error save the check to disk'
try:
f.write(check.encode('utf8'))
except:
return 'error save the check to disk'
finally:
f.close()
try:
conn = cups.Connection()
printers = conn.getPrinters()
printer_name = printers.keys()[0]
conn.printFile(printer_name, filename, 'Python_Status_print', {})
except:
return 'check printing error'
return 'ok'
def note_acceptor_worker(queue_request, queue_response, params):
verbose = params.verbose
if params.test:
serial.Serial = SerialMock
lh = logging.FileHandler(params.logfile) if params.daemon else logging.StreamHandler(sys.stdout)
verbose = verbose and verbose > 1
essp = EsspApi('/dev/ttyACM0', logger_handler=lh, verbose=verbose)
logger = essp.get_logger()
logger.info('[WORKER] Start')
cmds = {
'sync': lambda: essp.sync,
'reset': lambda: essp.reset,
'enable': lambda: essp.enable,
'disable': lambda: essp.disable,
'hold': lambda: essp.hold,
'display_on': lambda: essp.display_on,
'display_off': lambda: essp.display_off,
}
essp_state = 'disabled'
while True:
try:
data = queue_request.get(block=False)
except:
pass
else:
logger.info('[WORKER] command: %s' % data['cmd'])
cmd = data['cmd']
res = {'cmd': cmd, 'result': False}
if cmd == 'test':
res['result'] = True
queue_response.put(res)
continue
if cmd in ('start', 'reset', 'disable'):
if essp_state == 'hold':
essp.reject_note()
essp_state = 'disabled'
elif cmd in ('enable',):
if essp_state == 'disabled':
essp_state = 'enabled' if HOLD_AND_WAIT_ACCEPT_CMD else 'accept'
if cmd in cmds:
res['result'] = cmds[cmd]()()
elif cmd == 'start':
res['result'] = bool(essp.sync() and essp.enable_higher_protocol() and essp.disable() and
essp.set_inhibits(essp.easy_inhibit([1, 1, 1, 1, 1, 1, 1]), '0'))
elif cmd == 'accept':
if essp_state == 'hold':
essp_state = 'accept'
res['result'] = True
queue_response.put(res)
continue
if essp_state in ('enabled', 'accept'):
for event in essp.poll():
status = event['status']
param = event['param']
if status == EsspApi.DISABLED:
continue
if status == EsspApi.READ_NOTE:
logger.info('[WORKER] read note %s' % (param if param else 'unknown yet'))
if event['param'] and essp_state == 'enabled':
essp_state = 'hold'
essp.hold()
queue_response.put({'cmd': 'poll', 'status': status, 'param': param})
if essp_state == 'hold':
essp.hold()
sleep(1)
if os.getppid() == 1:
logger.info('[WORKER] Parent process has terminated')
break
def http_server_worker(params):
app = App(params)
app.add_route('/', app.index)
app.add_route('/{cmd:sync|reset|enable|disable|hold|accept}', app.simple_cmd)
app.add_route('/display_on', app.simple_cmd, cmd='display_on')
app.add_route('/display_off', app.simple_cmd, cmd='display_off')
app.add_route('/poll', app.poll)
app.add_route('/start', app.simple_cmd, cmd='start')
app.add_route('/test', app.simple_cmd, cmd='test')
app.add_route('/print', app.print_check)
httpd = make_server(params.host, int(params.port), app)
try:
httpd.serve_forever()
except KeyboardInterrupt:
httpd.server_close()
class Daemon:
def __init__(self, params):
logfile = params.logfile if params.daemon else None
self.stdin = '/dev/null'
self.stdout = logfile
self.stderr = logfile
self.params = params
self.children = []
def daemonize(self):
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write('fork #1 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
os.chdir('/')
os.setsid()
os.umask(0)
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write('fork #2 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
sys.stdout.flush()
sys.stderr.flush()
si = file(self.stdin, 'r')
so = file(self.stdout, 'a+')
se = file(self.stderr, 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
atexit.register(self.delpid)
pid = str(os.getpid())
file(self.params.pidfile, 'w+').write("%s\n" % pid)
def delpid(self):
os.remove(self.params.pidfile)
def start(self):
try:
pf = file(self.params.pidfile, 'r')
pid = int(pf.read().strip())
pf.close()
except IOError:
pid = None
if pid:
message = 'pidfile %s already exist. Daemon already running?\n'
sys.stderr.write(message % self.params.pidfile)
sys.exit(1)
self.daemonize()
self.run()
def stop(self):
try:
pf = file(self.params.pidfile, 'r')
pid = int(pf.read().strip())
pf.close()
except IOError:
pid = None
if not pid:
message = 'pidfile %s does not exist. Daemon not running?\n'
sys.stderr.write(message % self.params.pidfile)
return
try:
while 1:
os.kill(pid, SIGTERM)
sleep(0.1)
except OSError, err:
err = str(err)
if err.find('No such process') > 0:
if os.path.exists(self.params.pidfile):
os.remove(self.params.pidfile)
else:
print str(err)
sys.exit(1)
def restart(self):
self.stop()
self.start()
def run(self):
http_server_worker(self.params)
def start(params):
daemon = Daemon(params)
daemon.start()
def restart(params):
daemon = Daemon(params)
daemon.restart()
def stop(params):
daemon = Daemon(params)
daemon.stop()
def run(params):
daemon = Daemon(params)
daemon.run()
daemon_params = argparse.ArgumentParser(add_help=False)
daemon_params.add_argument('-p', '--pidfile', default='/tmp/kiosk_server.pid', help='Pid for daemon')
daemon_params.add_argument('-l', '--logfile', default=LOG_FILE, help='Logfile')
run_params = argparse.ArgumentParser(add_help=False)
run_params.add_argument('-t', '--test', help='Test', action='count')
run_params.add_argument('-v', '--verbose', action='count', help='-vv: very verbose')
run_params.add_argument('-P', '--port', default=BIND_PORT, help='Port to serve on (default %s)' % BIND_PORT)
run_params.add_argument('-H', '--host', default=BIND_ADDRESS,
help='Host to serve on (default %s; 0.0.0.0 to make public)' % BIND_ADDRESS)
parser = argparse.ArgumentParser(description='Kiosk http server. Help: %(prog)s start -h')
p = parser.add_subparsers()
sp_start = p.add_parser('start', parents=[run_params, daemon_params], help='Starts %(prog)s daemon')
sp_stop = p.add_parser('stop', parents=[daemon_params], help='Stops %(prog)s daemon')
sp_restart = p.add_parser('restart', parents=[daemon_params], help='Restarts %(prog)s daemon')
sp_run = p.add_parser('run', parents=[run_params], help='Run in foreground')
sp_start.set_defaults(func=start, daemon=True)
sp_stop.set_defaults(func=stop, daemon=True)
sp_restart.set_defaults(func=restart, daemon=True)
sp_run.set_defaults(func=run, daemon=False)
args = parser.parse_args()
args.func(args)