[IMP] hw_proxy: better driver status reporting with hw_proxy/status, improved printing reliability
bzr revid: fva@openerp.com-20140126183500-ejbm9d4jafl817tq
This commit is contained in:
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ee3fa52bbe
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f1fa4fa230
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@ -10,6 +10,8 @@ import random
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import math
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import openerp.addons.hw_proxy.controllers.main as hw_proxy
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import subprocess
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from threading import Thread
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from Queue import Queue, Empty
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try:
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import usb.core
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@ -27,11 +29,16 @@ from openerp.addons.web.controllers.main import manifest_list, module_boot, html
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_logger = logging.getLogger(__name__)
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class EscposDriver(hw_proxy.Proxy):
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class EscposDriver(Thread):
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def __init__(self):
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Thread.__init__(self)
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self.queue = None
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self.status = {'status':'connecting', 'messages':[]}
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supported_printers = [
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{ 'vendor' : 0x04b8, 'product' : 0x0e03, 'name' : 'Epson TM-T20' }
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]
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self.supported_printers = [
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{ 'vendor' : 0x04b8, 'product' : 0x0e03, 'name' : 'Epson TM-T20' },
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{ 'vendor' : 0x04b8, 'product' : 0x0202, 'name' : 'Epson TM-T70' },
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]
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def connected_usb_devices(self,devices):
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connected = []
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@ -41,31 +48,73 @@ class EscposDriver(hw_proxy.Proxy):
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return connected
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def get_escpos_printer(self):
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printers = self.connected_usb_devices(self.supported_printers)
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if len(printers) > 0:
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return escpos.printer.Usb(printers[0]['vendor'], printers[0]['product'])
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else:
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try:
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printers = self.connected_usb_devices(self.supported_printers)
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if len(printers) > 0:
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self.set_status('connected','Connected to '+printers[0]['name'])
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return escpos.printer.Usb(printers[0]['vendor'], printers[0]['product'])
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else:
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self.set_status('disconnected','Printer Not Found')
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return None
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except Exception as e:
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self.set_status('error',str(e))
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return None
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@http.route('/hw_proxy/open_cashbox', type='json', auth='admin')
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def open_cashbox(self):
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_logger.info('ESC/POS: OPEN CASHBOX')
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eprint = self.get_escpos_printer()
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if eprint != None:
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eprint.cashdraw(2)
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eprint.cashdraw(5)
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else:
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_logger.error('ESC/POS: OPEN CASHBOX: could not find printer')
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def get_status(self):
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self.push_task('status')
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return self.status
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@http.route('/hw_proxy/print_receipt', type='json', auth='admin')
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def print_receipt(self, receipt):
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_logger.info('ESC/POS: PRINT RECEIPT')
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eprint = self.get_escpos_printer()
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if eprint != None:
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self.print_receipt_body(eprint,receipt)
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eprint.cut()
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def open_cashbox(printer):
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printer.cashdraw(2)
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printer.cashdraw(5)
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def set_status(self, status, message = None):
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if status == self.status['status']:
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if message != None and message != self.status['messages'][-1]:
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self.status['messages'].append(message)
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else:
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_logger.error('ESC/POS: PRINT RECEIPT: could not find printer')
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self.status['status'] = status
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if message:
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self.status['messages'] = [message]
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else:
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self.status['messages'] = []
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if status == 'error' and message:
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_logger.error('ESC/POS Error: '+message)
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elif status == 'disconnected' and message:
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_logger.warning('ESC/POS Device Disconnected: '+message)
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def run(self):
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self.queue = Queue()
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while True:
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try:
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timestamp, task, data = self.queue.get(True)
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printer = self.get_escpos_printer()
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if printer == None:
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if task != 'status':
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self.queue.put((timestamp,task,data))
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time.sleep(5)
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continue
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elif task == 'receipt':
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if timestamp >= time.time() - 1 * 60 * 60:
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self.print_receipt_body(printer,data)
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printer.cut()
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elif task == 'cashbox':
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if timestamp >= time.time() * 12:
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self.open_cashbox(printer)
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elif task == 'status':
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pass
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except Exception as e:
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self.set_status('error', str(e))
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_logger.error(e);
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def push_task(self,task, data = None):
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if not self.isAlive():
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self.start()
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self.queue.put((time.time(),task,data))
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def print_receipt_body(self,eprint,receipt):
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@ -208,3 +257,19 @@ class EscposDriver(hw_proxy.Proxy):
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+' '+ str(receipt['date']['hour']).zfill(2)
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+':'+ str(receipt['date']['minute']).zfill(2) )
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driver = EscposDriver()
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hw_proxy.drivers['escpos'] = driver
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class EscposProxy(hw_proxy.Proxy):
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@http.route('/hw_proxy/open_cashbox', type='json', auth='admin')
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def open_cashbox(self):
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_logger.info('ESC/POS: OPEN CASHBOX')
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driver.push_task('cashbox')
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@http.route('/hw_proxy/print_receipt', type='json', auth='admin')
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def print_receipt(self, receipt):
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_logger.info('ESC/POS: PRINT RECEIPT')
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driver.push_task('receipt',receipt)
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@ -7,6 +7,7 @@ import openerp
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import time
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import random
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import subprocess
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import simplejson
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import werkzeug
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import werkzeug.wrappers
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_logger = logging.getLogger(__name__)
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@ -17,13 +18,23 @@ from openerp.http import request
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from openerp.addons.web.controllers.main import manifest_list, module_boot, html_template
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# drivers modules must add to drivers an object with a get_status() method
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# so that 'status' can return the status of all active drivers
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drivers = {}
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class Proxy(http.Controller):
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def __init__(self):
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self.scale = 'closed'
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self.scale_weight = 0.0
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def get_status(self):
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statuses = {}
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for driver in drivers:
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statuses[driver] = drivers[driver].get_status()
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return statuses
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@http.route('/hw_proxy/hello', type='http', auth='admin')
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def helloajx(self):
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def hello(self):
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return request.make_response('ping', {
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'Cache-Control': 'no-cache',
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'Content-Type': 'text/html; charset=utf-8',
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@ -31,9 +42,43 @@ class Proxy(http.Controller):
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'Access-Control-Allow-Methods': 'GET',
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})
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@http.route('/hw_proxy/handshake', type='json', auth='admin')
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def handshake(self):
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return True
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@http.route('/hw_proxy/status', type='http', auth='admin')
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def status_http(self):
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resp = '<html>\n<body>\n<h1>Hardware Proxy Status</h1>\n'
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statuses = self.get_status()
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for driver in statuses:
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status = statuses[driver]
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if status['status'] == 'connecting':
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color = 'black'
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elif status['status'] == 'connected':
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color = 'green'
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else:
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color = 'red'
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resp += "<h2 style='color:"+color+";'>"+driver+' : '+status['status']+"</h2>\n"
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resp += "<ul>\n"
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for msg in status['messages']:
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resp += '<li>'+msg+'</li>\n'
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resp += "</ul>\n"
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resp += "<script>\n\tsetTimeout(function(){window.location.reload();},30000);\n</script>\n</body>\n</html>\n\n"
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return request.make_response(resp,{
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'Cache-Control': 'no-cache',
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'Content-Type': 'text/html; charset=utf-8',
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'Access-Control-Allow-Origin': '*',
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'Access-Control-Allow-Methods': 'GET',
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})
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@http.route('/hw_proxy/status', type='json', auth='admin')
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def status_json(self):
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return request.make_response(simplejson.dumps(self.get_status()),{
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'Cache-Control': 'no-cache',
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'Content-Type': 'text/html; charset=utf-8',
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'Access-Control-Allow-Origin': '*',
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'Access-Control-Allow-Methods': 'GET',
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})
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@http.route('/hw_proxy/scan_item_success', type='json', auth='admin')
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def scan_item_success(self, ean):
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@ -26,7 +26,9 @@ except ImportError:
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class Scanner(Thread):
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def __init__(self):
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Thread.__init__(self)
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self.status = {'status':'connecting', 'messages':[]}
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self.input_dir = '/dev/input/by-id/'
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self.barcodes = Queue()
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self.keymap = {
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2: ("1","!"),
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3: ("2","@"),
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@ -84,6 +86,24 @@ class Scanner(Thread):
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57:(" "," "),
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}
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def set_status(self, status, message = None):
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if status == self.status['status']:
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if message != None and message != self.status['messages'][-1]:
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self.status['messages'].append(message)
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else:
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self.status['status'] = status
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if message:
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self.status['messages'] = [message]
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else:
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self.status['messages'] = []
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if status == 'error' and message:
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_logger.error('Barcode Scanner Error: '+message)
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elif status == 'disconnected' and message:
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_logger.warning('Disconnected Barcode Scanner: '+message)
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def get_device(self):
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try:
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if not evdev:
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@ -92,14 +112,16 @@ class Scanner(Thread):
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keyboards = [ device for device in devices if 'kbd' in device ]
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scanners = [ device for device in devices if ('barcode' in device.lower()) or ('scanner' in device.lower()) ]
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if len(scanners) > 0:
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self.set_status('connected','Connected to '+scanners[0])
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return evdev.InputDevice(join(self.input_dir,scanners[0]))
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elif len(keyboards) > 0:
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self.set_status('connected','Connected to '+keyboards[0])
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return evdev.InputDevice(join(self.input_dir,keyboards[0]))
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else:
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_logger.error('Could not find the Barcode Scanner')
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self.set_status('disconnected','Barcode Scanner Not Found')
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return None
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except Exception as e:
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_logger.error('Found the Barcode Scanner, but unable to access it\n Exception: ' + str(e))
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self.set_status('error',str(e))
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return None
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@http.route('/hw_proxy/Vis_scanner_connected', type='json', auth='admin')
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except Empty:
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return ''
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def get_status(self):
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return self.status
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def run(self):
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""" This will start a loop that catches all keyboard events, parse barcode
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sequences and put them on a timestamped queue that can be consumed by
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@ -138,7 +163,7 @@ class Scanner(Thread):
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try:
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device.ungrab()
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except Exception as e:
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_logger.error('Unable to release barcode scanner\n Exception:'+str(e))
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self.set_status('error',str(e))
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device = self.get_device()
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if not device:
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time.sleep(5) # wait until a suitable device is plugged
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@ -173,17 +198,13 @@ class Scanner(Thread):
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shift = False
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except Exception as e:
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_logger.error('Could not read Barcode Scanner Events:\n Exception: '+str(e))
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self.set_status('error',str(e))
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s = Scanner()
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class ScannerDriver(hw_proxy.Proxy):
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@http.route('/hw_proxy/is_scanner_connected', type='json', auth='admin')
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def is_scanner_connected(self):
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if not s.isAlive():
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s.start()
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return s.get_device() != None
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hw_proxy.drivers['scanner'] = s
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class ScannerDriver(hw_proxy.Proxy):
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@http.route('/hw_proxy/scanner', type='json', auth='admin')
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def scanner(self):
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if not s.isAlive():
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