Question

我尝试调用Web端点（clk.example- api.com/berlin/clk/bikes/eBike20131127000a）。带有JSON的Webpoint响应：

{
 "geo": {

     "latitude": 52.520278,
     "longitude": 13.415712
 },
 "connection": {
     "connected": false,
     "since": "2017-06-20T14:55:15.280Z"
 },
 "mileage": 29382,
 "vin": "eBike20131127000a",
 "fuelLevel": 46,
 "batteryLevel": 5.424346,
 "light": false,
 "charging": false,
 "pedalForce": 0,
 "speed": 0,
 "batteryVoltageBike": 48742
}

我为此写的代码是：

function httpGet(myData, callback) {
  console.log("got to the http function"); 

// Update these options with the details of the web service you would like 
to call
var options = {
//the endpoint i call for example: 
//clk.example-api.com/berlin/clk/bikes/eBike20131127000a

    host: 'clk.example-api.com',
    path: '/berlin/clk/bikes/' + encodeURIComponent(myData),
    method: 'GET'
};


var req = http.request(options, res => {
    res.setEncoding('utf8');
    var returnData = "";


    res.on('data', chunk => {
        returnData = returnData + chunk;
    });


    res.on('end', () => {
        // we have now received the raw return data in the returnData 
variable.
        // We can see it in the log output via:
        // console.log(JSON.stringify(returnData))
        // we may need to parse through it to extract the needed data
        console.log(returnData);
        callback(returnData);  // this will execute whatever function the 
caller defined, with one argument
    });


});
req.end();
}

我实际上希望Item fuelLevel存储到returnData中。也许有人可以帮助我摆脱这种局面。我没有胶水如何待办事项。谢谢。

Answer 1

以下示例使用request模块，这是一个非常常见的模块（上个月下载量为2500万），用于节点内的api调用。

您需要安装请求npm install request

https://www.npmjs.com/package/request

var request = require('request');

function httpGet(myData, callback) {

    request('http://www.mocky.io/v2/' + encodeURIComponent(myData), function (error, response, body) {

        if (error) {
            return callback(error);
        }

        var info = JSON.parse(body);

        const fuelLevel = info.fuelLevel;

        callback(null, fuelLevel);

    });

}

function completed(err, data){
    if (err){
        console.log(err)
    }
    console.log(data);
}

httpGet('594bbf6e1200004111424b7d', completed)

从API响应中获取一项？

1 个答案: