Question

我正在尝试使用Node.js的异步功能。

这是我的完整代码。

[    0.000000] Memory: 2736316K/2883584K available (4796K kernel code, 488K rwdata, 1360K rodata, 448K init, 341K bss, 130884K reserved, 16384K cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     modules : 0xffffff8000000000 - 0xffffff8008000000   (   128 MB)
[    0.000000]     vmalloc : 0xffffff8008000000 - 0xffffffbebfff0000   (   250 GB)
[    0.000000]       .text : 0xffffff8008080000 - 0xffffff8008530000   (  4800 KB)
[    0.000000]     .rodata : 0xffffff8008530000 - 0xffffff8008690000   (  1408 KB)
[    0.000000]       .init : 0xffffff8008690000 - 0xffffff8008700000   (   448 KB)
[    0.000000]       .data : 0xffffff8008700000 - 0xffffff800877a200   (   489 KB)
[    0.000000]        .bss : 0xffffff800877a200 - 0xffffff80087cf76c   (   342 KB)
[    0.000000]     fixed   : 0xffffffbefe7fd000 - 0xffffffbefec00000   (  4108 KB)
[    0.000000]     PCI I/O : 0xffffffbefee00000 - 0xffffffbeffe00000   (    16 MB)
[    0.000000]     vmemmap : 0xffffffbf00000000 - 0xffffffc000000000   (     4 GB maximum)
[    0.000000]               0xffffffbf00000000 - 0xffffffbf02c00000   (    44 MB actual)
[    0.000000]     memory  : 0xffffffc000000000 - 0xffffffc0b0000000   (  2816 MB)

这是我的结果。

const fs = require('fs');
const request = require('request');
var schedule = require('node-schedule');

var getBTCData = function(callback){
    request({
        url: "https://api.gopax.co.kr/trading-pairs/BTC-KRW/book?level=1",
        method: 'GET',
        json :true
    }, (error, response, body) => {
        let date = new Date().toLocaleString();
        let today = date.substring(0,4) + "0" + date.substring(5,6) + 
date.substring(7,9); 
        let time = new Date().toLocaleString().substring(10,19);
        let bid = body.bid[0][1];
        let bidVolume = body.bid[0][2];
        let ask = body.ask[0][1];
        let askVolume = body.ask[0][2];
        let data = `${time},BTC,${bid},${bidVolume},${ask},${askVolume}\n`;
        callback(data, today);
    });

} 
setInterval(function(){getBTCData((data, today)=> 
{fs.appendFileSync(`./gopax_BTC_${today}.csv`,data);})}, 1000);

我想这样每秒获取一次数据。

19:02:32,BTC,7392000,0.70893442,7408000,0.69
19:02:32,BTC,7392000,0.70893442,7408000,0.69
19:02:33,BTC,7392000,0.70893442,7408000,0.69
19:02:35,BTC,7392000,0.70893442,7408000,0.69
19:02:35,BTC,7392000,0.70893442,7408000,0.69

如何每秒钟获取和保存数据？

Answer 1

根据我的理解，您可以这样做。

const fs = require('fs');
const request = require('request');
var schedule = require('node-schedule');

var getBTCData = function(callback){
    request({
        url: "https://api.gopax.co.kr/trading-pairs/BTC-KRW/book?level=1",
        method: 'GET',
        json :true
    }, (error, response, body) => {
        let date = new Date().toLocaleString();
        let today = date.substring(0,4) + "0" + date.substring(5,6) + 
date.substring(7,9); 
        let time = new Date().toLocaleString().substring(10,19);
        let bid = body.bid[0][1];
        let bidVolume = body.bid[0][2];
        let ask = body.ask[0][1];
        let askVolume = body.ask[0][2];
        let data = `${time},BTC,${bid},${bidVolume},${ask},${askVolume}\n`;
        callback(data, today);
    });

} 
setInterval(function(){getBTCData((data, today)=> 
{
    data.forEach(function(result) {
     setTimeOut(function() {
      fs.appendFileSync(`./gopax_BTC_${today}.csv`,result)
    }, 1000)
}); 
;})}, 1000);

如何使用node.js每隔一秒钟在csv文件中输入数据

1 个答案: