Node.js的JSON提取某些数据

Question

我想从一个JSON链接某些数据： bittrex.com/api/v1.1/public/getticker?market=BTC-DRS

在我的节点使用IRC僵尸： https://www.npmjs.org/package/node.bittrex.api

部分代码：

var url = ('https://bittrex.com/api/v1.1/public/getticker?market=BTC-DRS'); 

bittrex.options({ 
    'apikey' : settings.ticker.apikey, 
    'apisecret' : settings.ticker.secretkey, 
    'stream' : false, 
    'verbose' : false, 
    'cleartext' : true, 
}); 
    case 'ticker': 
    var user = from.toLowerCase(); 
    bittrex.sendCustomRequest(url, function(ticker, err) { 
    if(err) { 
     winston.error('Error in !ticker command.', err); 
     client.say(channel, settings.messages.error.expand({name: from})); 
     return; 
    } 
    winston.info('Fetched Price From BitTrex', ticker); 
    client.say(channel, settings.messages.ticker.expand({name: user, price: ticker})); 
    }); 
    break; 

它的工作原理，但在输出IRC

[1:21am] <nrpatten> !ticker 
[1:21am] <DRSTipbot> nrpatten The current DRS price at BitTrex {"success":true,"message":"","result":{"Bid":0.00000155,"Ask":0.00000164,"Last":0.00000155}} 

我已经使用了几件事情，让它只显示“最后”的答复，但我不断收到错误。

或者从https://bittrex.com/api/v1.1/public/getmarketsummaries

如同任何信息的某些数据我想从：

{"MarketName":"BTC-DRS","High":0.00000161,"Low":0.00000063,"Volume":280917.11022708,"Last":0.00000155,"BaseVolume":0.33696054,"TimeStamp":"2014-10-04T15:14:19.66","Bid":0.00000155,"Ask":0.00000164,"OpenBuyOrders":33,"OpenSellOrders":138,"PrevDay":0.00000090,"Created":"2014-06-18T04:35:38.437"}

感谢所有帮助

Answer 1

假设您已经解析的JSON（例如，通过JSON.parse(str);） ，你只需使用你想要的任何属性名称即可。例如：

var info = JSON.parse('{"MarketName":"BTC-DRS","High":0.00000161,"Low":0.00000063,"Volume":280917.11022708,"Last":0.00000155,"BaseVolume":0.33696054,"TimeStamp":"2014-10-04T15:14:19.66","Bid":0.00000155,"Ask":0.00000164,"OpenBuyOrders":33,"OpenSellOrders":138,"PrevDay":0.00000090,"Created":"2014-06-18T04:35:38.437"}'); 
console.log(info.Bid); 

此外，在一个不相关的物质，典型地回调参数遵循错误第一格式（例如的代替(err, result)(result, err)），以便与核心节点和NPM大多数其他模块相一致。