从 json 和 url 检索数据

Question

我有一个问题，当我输入 !test 时，我该如何取回特定数据并发送到我的频道？
通常，当我向 URL 发出请求时，我会收到以下响应：

http://192.168.1.12/JSON?request=getstatus&ref=4030

{"Name":"HomeSeer Devices","Version":"1.0","Devices":[{"ref":4030,"name":"ttt","location":"ttt","location2":"ttt","value":0,"status":"Off","device_type_string":"AC Input Device Unknown Sensor","last_change":"\/Date(1548247933316)\/","relationship":0,"hide_from_view":false,"associated_devices":[],"device_type":{"Device_API":4,"Device_API_Description":"Plug-In API","Device_Type":73,"Device_Type_Description":"Plug-In Type 73","Device_SubType":97,"Device_SubType_Description":"AC[16B5BB2-10]a\u0002y\u0002\u00020\u00020\u00020\u00020\u00020\u00020\u0002n\u00021\u00020"},"device_image":"","UserNote":"","UserAccess":"Any","status_image":"/images/HomeSeer/status/off.gif","voice_command":"tttt","misc":4864}]}

我希望机器人在每次执行 !test 命令时都回复该状态。我该怎么做？

下一个问题：如何设置发送带value参数的请求？

http://192.168.1.12/JSON?request=controldevicebyvalue&ref=4030&value=0

我希望如果我键入 !Device 0，它会通过发出该请求将 value 设置为 0。

这就是我处理命令的方式：

client.on('message', message => {
  // If the message is "ping"
  if (message.content === '!ping') {
 // Send "pong" to the same channel
    message.channel.send('pong');
  }
});

Answer 1

尝试安装并导入 opn 模块：命令行：$ npm install opn 然后将其安装到您的代码中：const opn = require('opn')

然后是

if (message.content == "!Device 0") {
    opn('http://192.168.1.12/JSON?request=controldevicebyvalue&ref=4030&value=0');
}

Answer 2

您可以使用 npm 中的 request 包。您可以使用以下命令安装它：

要使用它，您首先需要要求它，然后只需将您要请求的 URL 放入：结果将传递给回调：

const request = require('request');
request('http://www.google.com', function (error, response, body) {
  console.log('error:', error); // Print the error if one occurred
  console.log('statusCode:', response && response.statusCode); // Print the response status code if a response was received
  console.log('body:', body); // Print the HTML for the Google homepage.
});

对于你的情况，我会这样做：

client.on('message', message => {
  // Detect the command
  if (message.content.startsWith('!status')) {
    // Issue the request
    request('http://192.168.1.12/JSON?request=getstatus&ref=4030', (error, response, body) => {
      // If there has been an error, log it
      if (error) console.error(error);
      // Otherwise, you can reply with the JSON you got back
      else message.channel.send("```json\n" + body + "\n```");
    });
  }
});

如果你想把那个 body 字符串变成一个对象，你需要 JSON.parse() 它。

request('http://192.168.1.12/JSON?request=getstatus&ref=4030', (error, response, body) => {
  let object = JSON.parse(body);
  // Once you have the object you can get all of its properties like you'd normally do
});

你的第二个问题可以用同样的方法解决：你只需要根据参数设置thonURL。
如果你还没有，你需要创建一个参数解析器：有很多方法可以做到这一点，我将只向你展示这个例子中最简单的一个：

client.on('message', message => {
  let args = message.content.split(' '), // Get the arguments
    command = args.shift(); // Let the first be the command
  // If there's no first argument, reply with this message
  if (!args[0]) return message.reply("Please enter a value.");

  if (command == '!device') {
    request('http://192.168.1.12/JSON?request=controldevicebyvalue&ref=4030&value=' + args[0], (error, response, body) => {
      // If there has been an error, log it
      if (error) console.error(error);
      // Otherwise, you can reply with the JSON you got back
      else message.channel.send("```json\n" + body + "\n```");
    });
  }
});

如果您出于某种原因需要 body 中的对象，您可以按上述方式解析它。

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