在Firebase中启用云功能中的CORS [英] Enabling CORS in Cloud Functions for Firebase

问题描述

我目前正在学习如何使用Firebase的新云端功能，而我遇到的问题是我无法存取通过AJAX请求写入的功能。我得到没有访问控制允许起源错误。这里是我写的函数的一个例子：

$ p $ exports.test = functions.https.onRequest（（request，response）=> ; {
response.status（500）.send（{test：'Testing functions'}）;
}）


函数位于这个url中：
https://us-central1-fba-shipper-140ae.cloudfunctions.net/test

Firebase文档建议在功能中添加CORS中间件，我已经尝试过了，但是它不适用于我： https://firebase.google。 com / docs / functions / http-events

这是我做的：

  var cors = require（'cors'）; $（b）
 exports.test = functions.https.onRequest（（request，response）=> {
 cors（request，response，（）=> {
 response.status （500）.send（{test：'Testing functions'}）; 
}）
}）
  

我做错了什么？

更新：

Doug Stevenson 的回答有帮助。添加（{origin：true}）解决了这个问题，我还必须将 response.status（500）更改为 response.status（200）我完全错过了。

解决方案

有两个示例功能，由Firebase团队提供，演示如何使用CORS：

日期格式化的时间服务器

HTTPS端点要求身份验证

第二个示例使用与您目前使用的cors不同的工作方式。

此外，请考虑像这样导入，如示例所示：

  const cors = require（'cors'）（{o rigin：true}）; 
  

I'm currently learning how to use new Cloud Functions for Firebase and the problem I'm having is that I can't access the function I wrote through an AJAX request. I get the "No 'Access-Control-Allow-Origin'" error. Here's an example of the function I wrote:

exports.test = functions.https.onRequest((request, response) => {
  response.status(500).send({test: 'Testing functions'});
})

The function sits in this url: https://us-central1-fba-shipper-140ae.cloudfunctions.net/test

Firebase docs suggests to add CORS middleware inside the function, I've tried it but it's not working for me: https://firebase.google.com/docs/functions/http-events

This is how I did it:

var cors = require('cors');    

exports.test = functions.https.onRequest((request, response) => {
   cors(request, response, () => {
     response.status(500).send({test: 'Testing functions'});
   })
})

What am I doing wrong? I would appreciate any help with this.

UPDATE:

Doug Stevenson's answer helped. Adding ({origin: true}) fixed the issue, I also had to change response.status(500) to response.status(200) which I completely missed at first.

解决方案

There are two sample functions provided by the Firebase team that demonstrate the use of CORS:

• Time server with date formatting
• HTTPS endpoint requiring Authentication

The second sample uses a different way of working with cors than you're currently using.

Also, consider importing like this, as shown in the samples:

const cors = require('cors')({origin: true});

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