87 lines
3.3 KiB
Python
87 lines
3.3 KiB
Python
import traceback
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from django.utils.timezone import now
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from django.http import JsonResponse
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from rest_framework import status
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from apps.pos_device.models import Sessions, DeviceVersion
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from apps.authentication.models import Organization
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class POSDeviceException(Exception):
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"""Custom Exception for POS Validation"""
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def __init__(self, message, code=400):
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self.message = message
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self.code = code
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super().__init__(message)
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def get_client_ip(request):
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forwarded = request.META.get('HTTP_X_FORWARDED_FOR')
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return forwarded.split(',')[0] if forwarded else request.META.get('REMOTE_ADDR')
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class PosDeviceValidationMiddleware:
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REQUIRED_HEADERS = [
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'device-mac', 'device-serial', 'device-name',
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'device-sdk', 'device-provider', 'device-version',
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'device-vname', 'device-lng', 'device-lot' # noqa
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]
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def __init__(self, get_response):
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self.get_response = get_response
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def __call__(self, request):
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try:
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if request.path.startswith("/pos_device/pos/"):
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self.validate_request(request)
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return self.get_response(request)
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except POSDeviceException as e:
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return JsonResponse({'message': e.message}, status=e.code)
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# for response 500 errors in json format
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except Exception as e:
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if request.path.startswith('/pos_device/pos/'):
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return JsonResponse(
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{"message": str(e), "traceback": traceback.format_exc()},
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status=500
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)
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raise
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def validate_request(self, request):
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headers = request.headers
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data = {key: headers.get(key) for key in self.REQUIRED_HEADERS}
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missing = [key for key, value in data.items() if not value]
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if missing:
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raise POSDeviceException(f'پارامترهای ارسالی ناقص هستند: {", ".join(missing)}') # noqa
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provider_name = data['device-provider']
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organization = Organization.objects.filter(en_name=provider_name).first() # noqa
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if not organization:
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raise POSDeviceException('شرکت پرداخت الکترونیک پشتیبانی نمیشود!', code=402) # noqa
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if not organization.active:
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raise POSDeviceException('شرکت پرداخت الکترونیک مسدود شده است!', code=402) # noqa
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versions = DeviceVersion.objects.filter(organization=organization)
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if not versions.exists():
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raise POSDeviceException('هیچ نسخهای برای این شرکت ثبت نشده است!', code=402) # noqa
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current_version = versions.filter(code=data['device-version']).first()
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if not current_version or current_version.remove:
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raise POSDeviceException(
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f'نسخه {data["device-vname"]} منقضی شده است. لطفا بروزرسانی کنید.', code=402 # noqa
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)
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session = Sessions.objects.filter(
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device__serial=data['device-serial'],
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sdk=data['device-sdk']
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).first()
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if session:
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session.session_last_seen_date = now()
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session.lng = data['device-lng']
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session.lot = data['device-lot']
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session.version = data['device-version']
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session.ip = get_client_ip(request)
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session.save()
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