Firebase Cloud Storage:权限被拒绝.检索downloadURL时无法执行此操作Firebase [英] Firebase Cloud Storage: permission denied. could not perform this operation firebase when retrieving downloadURL

问题描述

我有一项功能可以成功将图像上传到我的云存储桶.

I have a function that successfully uploads an image to my cloud storage bucket.

使用另一个功能，我想获取图像的URL以显示在我的页面上(使用<img.../>)

With another function I want to get the URL of the image to show it on my page (With <img.../>)

getImageUrl(id: string) {
    return this.storageRef.child('X/' + id ).getDownloadURL();

但是当我这样做时..我得到一个无效" URL，当我复制该URL并转到它时，得到以下消息:

But when I do this.. I get an 'invalid' URL and when I copy the URL and go to it, I get the following message:

{
  "error": {
    "code": 403,
    "message": "Permission denied. Could not perform this operation"
  }
}

我在某处读到这可能是因为URL中没有附加令牌，但是如何启用它呢?

I read somewhere that this might be because there is no token attached in the URL, but how can I enable this?

推荐答案

最近几天，我一直在试图了解Firebase Storage规则，但我不知道为什么，但是当我分开这样的写作和阅读规则时例如:

The last couple of days I have been trying to understand Firebase Storage rules and I don't know why but when I separate rules for writing and for reading like this for example:

allow write: if request.auth != null && request.resource.size < 3 * 1024 * 1024;
allow read: if true;

该代码很好用，我可以使用getDownloadURL()进行读写，但是当我像这样一起使用它们时:

the code works great and I can write and read using getDownloadURL(), but when I use them together like this:

allow read, write: if request.auth != null && request.resource.size < 3 * 1024 * 1024;

我和你有同样的错误:

{
  "error": {
  "code": 403,
  "message": "Permission denied. Could not perform this operation"
  }

}

将它们一起使用时我可以写，但是当我尝试使用getDownloadURL()读取文件时，就会出现问题.也许您可以尝试按我提到的方法将规则分开，看看它是否有效.我希望它能解决您的问题.另外，请不要忘记，自设置规则以来，规则在5分钟后生效 .祝你好运.

I can write when using them together, but when I try to read the file using getDownloadURL(), the issue appears. Maybe you could try separating the rules as I mention and see if it works. I hope it solves your problem. Also, don't forget that the rules are live after 5 minutes from the moment you set them. Good luck.

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