S3现在要求它以Javascript对象符号格式出现。

[
 {
    "AllowedHeaders": [
        "*"
    ],
    "AllowedMethods": [
        "GET",
        "HEAD"
    ],
    "AllowedOrigins": [
        "*"
    ],
    "ExposeHeaders": []
 }
]

我建议根据您的需求更改AllowedOrigins和AllowedMethods。

如果您的请求没有指定Origin头，S3将不会在响应中包含CORS头。这真的把我扔了，因为我一直试图卷曲文件来测试CORS，但卷曲不包括起源。

这是一种简单的工作方法。

我知道这是一个老问题，但仍然很难找到解决办法。

首先，我用Rails 4、Paperclip 4、CamanJS、Heroku和AWS S3构建了一个项目。

你必须使用crossorigin: "anonymous"参数请求你的图像。

    <img href="your-remote-image.jpg" crossorigin="anonymous"> 

Add your site URL to CORS in AWS S3. Here is a refference from Amazon about that. Pretty much, just go to your bucket, and then select "Properties" from the tabs on the right, open "Permissions tab and then, click on "Edit CORS Configuration". Originally, I had < AllowedOrigin> set to *. Just change that asterisk to your URL, be sure to include options like http:// and https:// in separate lines. I was expecting that the asterisk accepts "All", but apparently we have to be more specific than that.

对我来说是这样的。

首先，激活S3存储桶中的CORS。使用以下代码作为指导:

<CORSConfiguration>
 <CORSRule>
   <AllowedOrigin>http://www.example1.com</AllowedOrigin>

   <AllowedMethod>PUT</AllowedMethod>
   <AllowedMethod>POST</AllowedMethod>
   <AllowedMethod>DELETE</AllowedMethod>

   <AllowedHeader>*</AllowedHeader>
 </CORSRule>
 <CORSRule>
   <AllowedOrigin>http://www.example2.com</AllowedOrigin>

   <AllowedMethod>PUT</AllowedMethod>
   <AllowedMethod>POST</AllowedMethod>
   <AllowedMethod>DELETE</AllowedMethod>

   <AllowedHeader>*</AllowedHeader>
 </CORSRule>
 <CORSRule>
   <AllowedOrigin>*</AllowedOrigin>
   <AllowedMethod>GET</AllowedMethod>
 </CORSRule>
</CORSConfiguration>

2)如果还是不行，请确保在你的img标签中添加一个带“*”值的“crossorigin”。把这个放在你的html文件中:

  let imagenes = document.getElementsByTagName("img");
    for (let i = 0; i < imagenes.length; i++) {
      imagenes[i].setAttribute("crossorigin", "*");

<AllowedOrigin>*</AllowedOrigin>

这不是一个好主意，因为使用*将授予任何网站访问bucket中的文件的权限。相反，您应该指定确切允许哪个源使用bucket中的资源。通常，这是你的域名

<AllowedOrigin>https://www.example.com</AllowedOrigin>

或者如果你想包含所有可能的子域:

<AllowedOrigin>*.example.com</AllowedOrigin>

Set CORS configuration in Permissions settings for you S3 bucket <?xml version="1.0" encoding="UTF-8"?> <CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <CORSRule> <AllowedOrigin>*</AllowedOrigin> <AllowedMethod>GET</AllowedMethod> <MaxAgeSeconds>3000</MaxAgeSeconds> <AllowedHeader>Authorization</AllowedHeader> </CORSRule> </CORSConfiguration> S3 adds CORS headers only when http request has the Origin header. CloudFront does not forward Origin header by default You need to whitelist Origin header in Behavior settings for your CloudFront Distribution.