Flash/Flex 跨域问题 - 对来自 AWS S3 的图像使用 BitmapData.draw() 导致 SecurityError:错误 #2122:安全沙箱违规 [英] Flash/Flex crossdomain issue - using BitmapData.draw() for image from AWS S3 results in SecurityError: Error #2122: Security sandbox violation

问题描述

我在包含来自我的 AWS S3 存储桶的图像的 DisplayObject 上使用 BitmapData.draw().当我将 S3 图像 URL 设置为 Image 对象的源时，图像在 swf 中加载良好，但是当我在其上使用 BitmapData.draw() 时，它给了我这个错误:

I am using BitmapData.draw() on a DisplayObject that includes an image from my AWS S3 bucket. The image loads fine in the swf when I set the S3 image URL as the source for an Image object but when I use BitmapData.draw() on it, it gives me this error:

SecurityError:错误 #2122:安全沙箱违规:BitmapData.draw:https://www.example.com/Example.swf 无法访问https://s3.amazonaws.com/example-images/example.jpg.策略文件是需要，但在此媒体上未设置 checkPolicyFile 标志已加载.

SecurityError: Error #2122: Security sandbox violation: BitmapData.draw: https://www.example.com/Example.swf cannot access https://s3.amazonaws.com/example-images/example.jpg. A policy file is required, but the checkPolicyFile flag was not set when this media was loaded.

AS 代码:

var bmpd:BitmapData = new BitmapData(objectToDraw.width,objectToDraw.height);
bmpd.draw(objectToDraw);

我尝试将以下 crossdomain.xml 文件放在我的 S3 存储桶根目录中，但无济于事:

I have tried putting the following crossdomain.xml file in my S3 bucket root to no avail:

<?xml version="1.0"?><!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<allow-access-from domain="*"/>
</cross-domain-policy>

推荐答案

在 S3 上访问文件有两种方式:

There are two ways to access files on S3:

• s3.amazonaws.com/[bucket name]/file.ext
• [存储桶名称].s3.amazonaws.com/file.ext

由于crossdomain.xml文件需要在域的根文件夹下，而您无权访问s3.amazonaws.com的根文件夹，因此您无法控制crossdomain.xml 文件(如果您使用第一种方法)

Since the crossdomain.xml file needs to be in the root folder of the domain, and you don't have access to the root folder of s3.amazonaws.com, you can't control the crossdomain.xml file if you are using the first method

如果您使用第二种方法，您可以在存储桶的根文件夹中放置一个 crossdomain.xml 文件，Flash Player 将正确使用该文件.

If you are using the second method, you can put a crossdomain.xml file in the root folder of your bucket and it will be used correctly by the Flash Player.

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