读取从url下载的csv数据中的单个数据

Question

I'm trying to fetch the data from Yahoo! Finance to get value for currency exchange with this url assuming I'm getting currency exchange for USD to EUR in javascript

http://download.finance.yahoo.com/d/quotes.csv?s=USDEUR=X&f=l1

in the csv, I would receive just the one value I need. Eg. - '0.8994'

Now, in same javascript file, I want this value to be pass into a variable

var USDEUR;

at this point, I'm not sure how to pass the value from the downloaded csv. Could someone enlighten me how to do this properly?

Thanks in advance

Answer 1

It seems you don't actually need to parse this file as a csv, it's basically a plain text string? Assuming jquery:

var USDEUR;
$.ajax({
    type: "GET",
    url: "http://download.finance.yahoo.com/d/quotes.csv?s=USDEUR=X&f=l1",
    dataType: "text",
    success: function(data) {USDEUR = data}
 });

EDIT: It seems the url has access control issues, you may not be able to do this with a XHTTP request from the client. Is this data meant to be accessed as a public API?

Answer 2

Use JQuery Ajax

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

<script>
var USDEUR;
$.get("download.finance.yahoo.com/d/quotes.csv?s=USDEUR=X&f=l1", function(data){
  USDEUR = $.parseXML(data);
}, "xml");
</script>