Question

目前Orion禁止使用'='标志： http://fiware-orion.readthedocs.io/en/1.5.0/user/forbidden_characters/index.html

但这会阻止使用查询字符串进行订阅：

$ (curl broker.waziup.io/v1/subscribeContext -s -S --header 'Content-Type: application/json' \
--header 'Accept: application/json' --header 'Fiware-Service:waziup' --header 'Fiware-ServicePath:/TEST' -d @- | python -mjson.tool) <<EOF
{
    "entities": [
        {
            "type": "SensingDevice",
            "isPattern": "false",
            "id": "Sensor1"
        }
    ],
    "attributes": [
        "temperature"
    ],
    "reference": "http://localhost/v1/sms/send?contact=0039&msg=Sensor1",
    "duration": "P1M",
    "notifyConditions": [
        {
            "type": "ONCHANGE",
            "condValues": [
                "temperature"
            ]
        }
    ],
    "throttling": "PT1S"
}
EOF

结果：

{
    "subscribeError": {
        "errorCode": {
            "code": "400",
            "details": "Illegal value for JSON field",
            "reasonPhrase": "Bad Request"
        }
    }
}

查询字符串用于将参数传递给回调服务器（我没有看到其他方法）。有什么方法吗？

Answer 1

根据NGSIv2中的自定义通知，有一种在通知URL中设置查询参数的方法。查看＆＃34;自定义通知＆＃34; NGSIv2 specification中的部分。

您正在进行的订阅将是这样的：

POST /v2/subscriptions
...

{
  "subject": {
    "entities": [
      {
        "id": "Sensor1",
        "type": "SensingDevice"
      }
    ],
    "condition": {
      "attrs": [ "temperature" ]
    }
  },
  "notification": {
    "httpCustom": {
      "url": "http://localhost/v1/sms/send",
      "qs": {
        "contact": "0039",
        "msg": "Sensor1"
      }
    },
    "attrs": [ "temperature"]
  },
  "expires": "2016-05-07T18:30:00.00Z",
  "throttling": 1
}

请注意，您甚至可以使用模板概括所有传感器的订阅，方法如下：

POST /v2/subscriptions
...

{
  "subject": {
    "entities": [
      {
        "idPattern": "Sensor.*",
        "type": "SensingDevice"
      }
    ],
    "condition": {
      "attrs": [ "temperature" ]
    }
  },
  "notification": {
    "httpCustom": {
      "url": "http://localhost/v1/sms/send",
      "qs": {
        "contact": "0039",
        "msg": "${id}"
      }
    },
    "attrs": [ "temperature"]
  },
  "expires": "2016-05-07T18:30:00.00Z",
  "throttling": 1
}

FIWARE Orion：在订阅有效负载中使用查询字符串

1 个答案: