切换到websocket后如何解析来自Binance的数据

如何解决切换到websocket后如何解析来自Binance的数据

现在我终于在 Binance 中切换到 websocket，我不能再像以前使用旧脚本那样解析响应中的数据。我在 Google Apps 脚本中使用 Javascript

function balanceBinance() {
  
  var key = '';
  var secret = '';

  var curTime = Number(new Date().getTime()).toFixed(0);
  var string = "type=SPOT&timestamp=" + curTime;
  var sKey = Utilities.computeHmacSha256Signature(string,secret);
  sKey = sKey.map(function(e) {
      var v = (e < 0 ? e + 256 : e).toString(16);
      return v.length == 1 ? "0" + v : v;
  }).join("");
  var params = {
    'type':'SPOT','method': 'GET','headers': {'X-MBX-APIKEY': key},'muteHttpExceptions': true
  };

  var url = "https://api.binance.com/sapi/v1/accountSnapshot?" + string + "&signature=" + sKey;
  var data = UrlFetchApp.fetch(url,params);
  var data = JSON.parse(data.getContentText());  
  var data = data.snapshotVos; 

Logger.log(data);
}

它返回：

[{data={totalAssetofBtc=0.0000117,balances=[{free=0.0000117,asset=BNB,locked=0},{asset=BTC,locked=0,free=0.00000093},{free=0.00026,asset=BTCDOWN,{locked=0,free=0.00,asset=EUR},{asset=USDT,free=0.06716916}]},type=spot,updateTime=1.622851199E12},{updateTime=1.622937599E12,data={totalAssetofBtc=0.0000117,balances=[{asset=BNB,free=0.0000117},asset=BTC,free=0.00026,asset=BTCDOWN},free=0.34585555,{free=0.06716916,asset=USDT}]},type=spot},{type=spot,updateTime=1.623023999E12,data={balances=[{locked=0,{asset=BTCDOWN,free=0.00026},{free=0.34585555,{free=411.06716916,asset=USDT}],totalAssetofBtc=0.11298258}},{updateTime=1.623110399E12,data={balances=[{free=0.0000117,asset=BNB},{asset=ETHDOWN,free=0.00376,asset=EUR,{free=0.40578148,totalAssetofBtc=0.0000117}},{data={totalAssetofBtc=0.0000117,{free=0.00000093,{free=0.00376,asset=ETHDOWN,updateTime=1.623196799E12}]

在以前版本的脚本中，我能够使用以下代码为任何相应的资产提取免费参数：

var data = data.filter(function (el) {
     return el.free > 0; 
});
  
  var i;
  for (i=0; i < data.length; i++) {
 
  var asset = data[i].asset;
  var free  = data[i].free; 
    if (free  < 1)                {var a = parseFloat(free);   var a = a.toFixed(8);   var free = parseFloat(a);} 
    if (free  > 1 && free < 10)   {var a = parseFloat(free);   var a = a.toFixed(4);   var free = parseFloat(a);}
    if (free  >=10)               {var a = parseFloat(free);   var a = a.toFixed(2);   var free = parseFloat(a);}
    
  var row=rows.indexOf(asset)+2;   
     if (row>0){
       sheet.getRange(row,13).setValue(free);}    
  }

解决方法

你的JSON结构是这样的

snapshotVos = [
  { data: { balances: [{asset,free},{asset,free}] } },{ data: { balances: [{asset,free}] } } ]

示例代码：

function parseJson() {
  var sampleJson ={msg:'',snapshotVos:[{updateTime:1.622851199E12,data:{totalAssetOfBtc:0.10958809,balances:[{asset:'BNB',free:0.0000,locked:0},{asset:'BTC',locked:0,free:0.00000093},{asset:'BTCDOWN',free:0.00026,{free:2981.34585555,asset:'EUR',{free:411.06716916,asset:'USDT',locked:0}]},type:'spot'},{data:{balances:[{asset:'BNB',free:0.0000117},free:0.00026},{locked:0,free:2981.34585555,asset:'EUR'},{asset:'USDT',free:411.06716916,locked:0}],totalAssetOfBtc:0.11403012},updateTime:1.622937599E12,type:'spot'}],code:200.0}; 

  var sampleJsonStr = JSON.stringify(sampleJson);
  var data = JSON.parse(sampleJsonStr);
  var balances = []

  data.snapshotVos.forEach( snap => {
    balances.push(snap.data.balances);
  });
  Logger.log(balances);
  Logger.log(balances.flat());
  
  var data = balances.flat().filter(function (el) {
      return el.free > 0; 
  });

  Logger.log(data);
  for (i=0; i < data.length; i++) {
 
    var asset = data[i].asset;
    var free  = data[i].free; 
    Logger.log("asset: "+asset+" "+"free: "+free);
  }

}

它有什么作用？

1. 我根据您的示例数据创建了一个 JSON 对象，使用 JSON.stringify() 将其转换为字符串，然后使用 JSON.parse() 将其转换回 json 对象
2. 我将 data.balances array 中的所有 snapshotVos array 合并为一个 balances array。我使用 array.flat() 将二维数组更改为一维数组，然后根据您给定的条件对其进行过滤。
3. data 变量应该已经与您的 for 循环匹配。