python实现斑马打印机网络打印

    def post(self, request):
        """新增对象

        Args:
            request (rest_framework.request.Request): HTTP request

        Returns:
            response(rest_framework.response.Response): HTTP response.
            error_response(rest_framework.response.error_response): error_response

        """
        request_data = request.data
        template_name = request_data.get(‘template_name‘, ‘‘)
        if not template_name:
            return error_response(reason=‘模板名称不能为空‘,
                                  info=‘template_name is required‘,
                                  state=status.HTTP_400_BAD_REQUEST)

        function_name = request_data.get(‘function_name‘, ‘‘)
        if not function_name:
            return error_response(reason=‘功能模块名称不能为空‘,
                                  info=‘function_name is required‘,
                                  state=status.HTTP_400_BAD_REQUEST)

        is_function_name_exist = PrinterConfig.objects.filter(function_name=function_name).exists()
        if not is_function_name_exist:
            return error_response(reason=‘功能模块名称不存在‘,
                                  info=‘function_name is not exist‘,
                                  state=status.HTTP_400_BAD_REQUEST)

        is_template_name_exist = PrinterConfig.objects.filter(template_name=template_name).exists()
        current_dir = os.path.join(settings.BASE_DIR, ‘print_template‘)
        is_template_name_in = template_name in os.listdir(current_dir)
        if not any([is_template_name_in, is_template_name_exist]):
            return error_response(reason=‘模板名称不存在‘,
                                  info=‘template_name is not exist‘,
                                  state=status.HTTP_400_BAD_REQUEST)

        file_path = os.path.join(current_dir, template_name)
        qr_code_file = open(file_path, ‘r‘, encoding=‘utf-8‘)
        template_data = qr_code_file.read()
        template = Template(template_data)
        zpl = template.render(Context(request_data))

        # 携带ZPL指令向打印机发送http请求
        ip_port = PrinterConfig.objects.filter(template_name=template_name).values_list(‘printer_ip‘, ‘printer_port‘)
        ip, port = ip_port[0][0], ip_port[0][1]
        if not all([ip, port]):
            return error_response(reason=‘打印配置的IP或端口未配置‘,
                                  info=‘printer ip and port must be configured‘,
                                  state=status.HTTP_400_BAD_REQUEST)

        # print_server = ‘http://‘ + str(ip) + ‘:‘ + str(port)
        client = None
        try:
            # requests.post(print_server, data=zpl.encode(‘utf-8‘))
            client = socket.socket(socket.AF_INET, type=socket.SOCK_STREAM)
            client.connect((ip, port))
            client.send(zpl.encode(‘utf-8‘))
            # 打印机未连接!
        except Exception as other_except:  # pylint: disable=broad-except
            except_info = other_except.args[0]
            # except_info = other_except.args[0].args[0]
            # if except_info == ‘Connection aborted.‘:
            if isinstance(except_info, tuple) and except_info == ‘Connection aborted.‘:
                return Response({‘result‘: ‘打印成功，请确认‘})
            else:
                logger.error(other_except)
                return error_response(reason=‘打印失败，请检查打印配置是否正确‘,
                                      info=str(other_except),
                                      state=status.HTTP_400_BAD_REQUEST)
        finally:
            client.close()

        return Response({‘result‘: ‘ok‘})

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