原产地http：// localhost不被Access-Control-Allow-Origin允许 [英] Origin http://localhost is not allowed by Access-Control-Allow-Origin

问题描述

我正在尝试从backbone.js取回到我的node.js服务器。但是，我在控制台中收到以下错误：

原始http：// localhost不允许Access-Control-Allow-Origin。

我添加了以下到我的node.js服务器：

  var allowCrossDomain = function（req，res，next）{
 res.header（'Access-Control-Allow-Origin'，http：// localhost）; 
 res.header（'Access-Control-Allow-Methods'，'GET，PUT，POST，DELETE'）; 
 res.header（'Access-Control-Allow-Headers'，'Content-Type'）; 
}; 
 
 app.configure（function（）{
 app.use（allowCrossDomain）; 
}）; 
  

但它仍然返回相同的错误。但是，即使这样工作，它似乎不是理想的解决方案，因为我希望来自各地的用户能够发送请求。

解决方案

如果您希望每个人都能访问Node应用程序，请尝试使用

  res。 
 


$ b 这将允许请求任何来源。 CORS启用网站有许多有关不同的Access-Control-Allow标头以及如何使用它们的信息。

我正在使用Chrome，请查看此< a>关于localhost和Access-Control-Allow-Origin的bug。此处还有另一个 StackOverflow问题详细描述了该问题。 / p>

I'm trying to do a fetch from backbone.js to my node.js server. However, I get the following error in the console:

Origin http://localhost is not allowed by Access-Control-Allow-Origin.

I added the following to my node.js server:

var allowCrossDomain = function(req, res, next) {
    res.header('Access-Control-Allow-Origin', "http://localhost");
    res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
    res.header('Access-Control-Allow-Headers', 'Content-Type');
};

app.configure(function() {
    app.use(allowCrossDomain);
});

But it's still returning the same error. However, even if this did work, it doesn't seem like the ideal solution, as I would like users from all over to be able to send requests.

解决方案

If you want everyone to be able to access the Node app, then try using

res.header('Access-Control-Allow-Origin', "*")

That will allow requests from any origin. The CORS enable site has a lot of information on the different Access-Control-Allow headers and how to use them.

I you are using Chrome, please look at this bug bug regarding localhost and Access-Control-Allow-Origin. There is another StackOverflow question here that details the issue.

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