Google新闻API提供了一个错误Uncaught SyntaxError：Unexpected token'）' [英] Google News API gives an error Uncaught SyntaxError: Unexpected token ')'

问题描述

最初我写了一些这样的代码：

  var val =MSFT; 
 $ .get（'https://www.google.com/finance/company_news?q='+val+'&output=rss'，
 function（data）{
 console .log（data）; 
}）; 
  

而且该代码在本地工作正常。但是当我试图从GitHub调用这个相同的函数时，它给我一个关于CORS的错误。

所以，我想用下面的客户端代码：

  var nws_lbl =MSFT; 
 var news_url ='https://www.google.com/finance/company_news?q='+nws_lbl+'&output=rss&callback=？ ; 
 
 $ .ajax（{
 url：news_url，
 data：{
格式：'json'
}，
错误：函数（）{
 console.log（获取数据时出错）; 
}，
 dataType：'jsonp'，
成功：函数（数据）{
 console.log（data）; 
} 
}）; 
  

但是，我得到以下错误：

它总是会出错。不知道我错过了什么。任何人都可以提供帮助吗？

解决方案

您可以通过 CORS proxy ，如下所示：

  var val =MSFT，
 proxyUrl ='https://cors-anywhere.herokuapp.com/'，
 targetUrl ='https://www.google.com/finance/company_news？ q = '+ VAL +' &安培;输出= RSS'; 
 $ b $ .get（proxyUrl + targetUrl，
 function（data）{
 console.log（data）; 
}）; 
  

代理请求 targetUrl ，获取响应，添加 Access-Control-Allow-Origin 响应头和其他所需的CORS头，然后将其传递回您的请求代码。并且添加的 Access-Control-Allow-Origin 标题的响应是浏览器所看到的，所以浏览器可以让您的前端代码实际访问响应。

---

就问题中的第二个代码片段而言，我认为它不适用于您的原因是 https://www.google.com/finance/company_news 没有任何方法可以返回JSONP。因此，格式和 callback params似乎不会导致您想要的内容，但会导致一些非JSONP响应，你的代码无法解析，因为它不是预期的格式。

Originally I wrote some code like this:

var val="MSFT";
$.get('https://www.google.com/finance/company_news?q='+val+'&output=rss', 
  function (data) {
    console.log(data);
});

And that code is working fine locally. But when I am trying to call this same function from GitHub it is giving me an error about CORS.

So, I am trying with the following client-side code:

var nws_lbl = "MSFT";
var news_url = 'https://www.google.com/finance/company_news?q='+nws_lbl+'&output=rss&callback=? ';

$.ajax({
    url: news_url,
    data: {
       format: 'json'
    },
    error: function () {
        console.log("Error while getting data");
    },
    dataType: 'jsonp',
    success: function (data) {
        console.log(data);
    }
});

But with that I am getting the following error:

In the network I am getting 200 that means response is correct.

It is always going to the error. Not sure what I am missing. Can anyone help?

解决方案

You can get around the CORS restriction by making your request through a CORS proxy, like this:

var val="MSFT",
    proxyUrl = 'https://cors-anywhere.herokuapp.com/',
    targetUrl = 'https://www.google.com/finance/company_news?q='+val+'&output=rss';

$.get(proxyUrl + targetUrl, 
  function (data) {
    console.log(data);
});

The proxy makes the request to targetUrl, gets the response, adds the Access-Control-Allow-Origin response header and any other CORS headers needed, then passes that back to your requesting code. And that response with the Access-Control-Allow-Origin header added is what the browser sees, so the browser lets your frontend code actually access the response.

---

As far as the second code snippet in the question, I think the reason it doesn’t work for you is that https://www.google.com/finance/company_news doesn’t have any way to return JSONP. So the format and callback params don’t seem to cause what you want but are causing some non-JSONP response instead, which your code fails to parse because it’s not in the expected format.

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