用nodered提取json [英] extract json with nodered

问题描述

我想提取带有红色节点的消息中的 json 部分

我收到红色节点的消息，但我无法提取数据消息示例:

POST/HTTP/1.1主持人:xxx.xx.xxx.5:9000用户代理:libcurl-agent/1.0内容类型:应用程序/json接受:应用程序/json内容长度:526{时间戳":1571997083，数据": {温度":20.613545532227，湿度":61.3828125，电池":3.47},框架":814962xxxx16a1dc5"，"gatewayID": "AA555Axxxx0xx964","othersGW": [],"clientID": "xxxx","DevAddr": "011xxxxb","DevEUI": "8cf9xxx000000xxx","sensorInstallId": "8cf95xxx0000xxxx","loraPort": 8,fcnt":1607，rxpk":{tmst":2380181019，"时间": "2019-10-25T09:51:23.472998Z",陈":0，"rfch": 0,频率":867.1，统计":1，"modu": "LORA","datr": "SF7BW125","codr": "4/5","lsnr": 9,rssi":-72，大小":22，数据":xxxxxxxxxxxxxxxx/YxWg=="}}

所以我想要温度等数据...我不知道我必须使用的节点

非常感谢

解决方案

从评论中更好地了解您要执行的操作.

使用 TCP-in 节点可能不是正确的方法.使用 HTTP-in/HTTP-out 节点会做得更好，因为它们将处理所有 HTTP 标头并向客户端发送正确的响应，以便连接关闭.

HTTP-in 节点采用路径，例如/input 将附加到 Node-RED URL，给出类似于 http://localhost:1880/input 的内容.它还需要一个 HTTP 动词，在本例中为 POST.您可以在 此处 的 Node-RED 说明书中找到更多详细信息和大量示例.>

您需要更新客户端以指向正确的路径和端口.

I want to extract json part in a message with node red

I receive the message in node red but I can't extract the data exemple of a message:

POST / HTTP/1.1

Host: xxx.xx.xxx.5:9000

User-Agent: libcurl-agent/1.0

Content-type: application/json

Accept: application/json

Content-Length: 526   
   {
   "timestamp": 1571997083,
   "data": {
      "temperature": 20.613545532227,
      "humidity": 61.3828125,
      "battery": 3.47
   },
   "frame": "814962xxxx16a1dc5",
   "gatewayID": "AA555Axxxx0xx964",
   "othersGW": [],
   "clientID": "xxxx",
   "DevAddr": "011xxxxb",
   "DevEUI": "8cf9xxx000000xxx",
   "sensorInstallId": "8cf95xxx0000xxxx",
   "loraPort": 8,
   "fcnt": 1607,
   "rxpk": {
      "tmst": 2380181019,
      "time": "2019-10-25T09:51:23.472998Z",
      "chan": 0,
      "rfch": 0,
      "freq": 867.1,
      "stat": 1,
      "modu": "LORA",
      "datr": "SF7BW125",
      "codr": "4/5",
      "lsnr": 9,
      "rssi": -72,
      "size": 22,
      "data": "xxxxxxxxxxxxxxxx/YxWg=="
   }
}

so I would like to have data of temperature etc... and I don't know the node I have to use

Thanks a lot

解决方案

Having got a better view of what you are trying to do from the comments.

Using the TCP-in node is probably not the right approach for this. You will do much better using the HTTP-in/HTTP-out nodes as these will handle dealing with all the HTTP-header and sending a proper response to the client so the connection gets closed.

The HTTP-in node takes a path e.g. /input which will be appended to the Node-RED URL giving something like http://localhost:1880/input. It also takes a HTTP verb which in this case would be POST. You can find more details and lots of examples in the Node-RED cookbook here.

You will need to update the client to point to the correct path and port.

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