Question

我是javascript的新手，我构建了一个脚本，该脚本从bitstamp API获取最新的比特币价格，此后，回调函数发送参数并将其放在会话中（以便以后可以调用）。

我想知道我做的事是不是一件好事，或者我可以通过一些好的解释使其变得更好。

**我需要像4次一样调用API链接（每次获取其他加密货币价格（LTC，ETH，BCH）。

当我为ETH调用APIV2时出现错误

var HttpClient = function() {
  this.get = function(aUrl,aCallback , sign){
    var anHttpRequest = new XMLHttpRequest();
    anHttpRequest.open("GET",aUrl,true);
    anHttpRequest.onreadystatechange = function() {
      if(anHttpRequest.readyState == 4 && anHttpRequest.status == 200)
      {

          var resp = eval("(" + anHttpRequest.responseText + ")");
          aCallback(resp,sign);
      }

    }
    anHttpRequest.send( null );
  }
}

function cb(response,sign){
  var v1 = JSON.parse(response).last; // last value;
  var xhttp = new XMLHttpRequest();
  xhttp.open("GET","TESTING?"+sign+"=" + v1,true);
  xhttp.send();
}

/*var theurl = 'https://www.bitstamp.net/api/ticker';
var client = new HttpClient();
var sign1 = "BTC";
client.get(theurl,cb ,sign1);*/


var theurl2 = 'http://www.bitstamp.net/api/v2/ticker/ethusd';
var client2 = new HttpClient();
var sign2 = "ETH";
client2.get(theurl2,cb ,sign2);

此网址var theurl2 = 'http://www.bitstamp.net/api/v2/ticker/ethusd';调用时给我一个错误-Failed to load https://www.bitstamp.net/api/v2/ticker/ethusd: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

用javascript调用JSON-设置为会话

0 个答案: