PhoneGap的阿贾克斯request.responseText空，试图从雅虎股票信息链接csv文件 [英] Phonegap Ajax request.responseText empty, trying to get a csv file from a yahoo stock info link

问题描述

我只使用HTML，JavaScript和CSS开发的应用程序，因为我正在做它的PhoneGap（所以没有PHP或类似的东西）。我想开发使用雅虎股票CSV API一个简单的股票行情应用程序。

I'm developing an app using only html, javascript and css because I'm making it for phonegap (so no php or anything like that). I am trying to develop a simple stock quotes application that uses the yahoo stock csv api.

这个API的工作，向其提供任何给定股票的象征，它会下载一个CSV文件，该文件提供了有关股票的信息。

This api works by providing it the symbol of any given stock and it will download a csv file that gives you information about the stock.

这是例子是，如果你看看信息关于特斯拉汽车公司，其股票代码为TSLA，你会使用下面的链接：

An example would be if you look up info about Tesla Motors, its stock symbol is TSLA, and you would use the following link:

[http://download.finance.yahoo.com/d/quotes.csv?s=TSLA&f=nsl1op&e=.csv][1]

将这个链接手动，会自动下载与特斯拉汽车公司的信息csv文件，因此该文件的内容会是这个样子：

Going to this link manually, will automatically download the csv file with the info on Tesla Motors, so the file contents would look something like this:

"Tesla Motors, Inc","TSLA",84.35,81.23,83.24

但是，当我试图把它在我的应用程序，它返回一个空的响应。这里是我尝试获取信息：

But when I try to get it in my app, it returns an empty response. Here is how I try to get the info:

function getStockInfo(stockSymbol) {
    var request = new XMLHttpRequest();
    request.open("GET", "http://download.finance.yahoo.com/d/quotes.csv?s=" + stockSymbol + "&f=nsl1op&e=.csv", true);
    request.send();
    request.onreadystatechange = function() {
        if (request.readyState == 4) {
            if (request.status == 200 || request.status == 0) {
                alert("response: " + request.responseText);
                var stockInfo = request.responseText.split(",");

                localStorage.companyName = stockInfo[0];
                localStorage.stockSymbol = stockInfo[1];
                localStorage.startPrice = stockInfo[2];
                localStorage.endPrice = stockInfo[3];
                localStorage.highPrice = stockInfo[4];
                document.location.href = "stockInfo.html";
            }
        }
    }
}

行，上面写着警报（回应：+ request.responseText）; 显示request.responseText是空白。我做这错了吗？如果它是一个链接，下载一个CSV文件，你必须让不同的要求？是否有这样做的PhoneGap的？我一直在试图找到这个答案，但没有设法的一种特殊方式。我想在这个AP preciate任何帮助。

The line that says alert("response: " + request.responseText); shows the request.responseText is blank. Am I doing this wrong? If it's a link that downloads a csv file, do you have to get the request differently? Is there a special way of doing this for phonegap?, I've been trying to find the answer on this, but haven't managed to. I would appreciate any help on this.

推荐答案

如果你看的控制台，您将看到以下错误：

If you watch the console, you will see the following error :

XMLHtt prequest无法加载    http://download.finance。 yahoo.com/d/quotes.csv?s=TSLA&f=nsl1op&e=.csv 。   没有访问控制 - 允许 - 原产地标头的请求的present   资源。原产地'空'，因此没有允许访问。

XMLHttpRequest cannot load http://download.finance.yahoo.com/d/quotes.csv?s=TSLA&f=nsl1op&e=.csv. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

您必须允许访问雅虎的服务器。在config.xml中添加行

You have to allow the access to the yahoo server. In config.xml add the line

＆LT;获得原产地=*/＆GT; 如果你想允许进入任何服务器或

<access origin="*" /> if you want to allow access to any server or

或＆LT;获得原产地= HTTP：//download.finance.yahoo.com/＆GT; 如果你只希望允许访问雅虎的服务器

or <access origin=http://download.finance.yahoo.com" /> if you only want to allow access to the yahoo server

的http://docs.phonegap.com/en/edge/guide_appdev_whitelist_index.md.html#Whitelist%20Guide

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