CODEWITHSUNDEEP
actionscript-3flashamazon-s3cross-domain
nzifnab
nzifnab

Reputation: 16092

Load an image in flash/actionscript from a different origin domain

I'm a complete noob when it comes to flash coding.

I have a flash swf file that I'm loading from an S3 assets bucket. Inside the flash swf it should be displaying a "Browse" button, images also courtesy of the same bucket. This works fine when I host the images and swf file from the same domain that the site is on, but not when loaded from S3.

I have added a crossdomain.xml file to the assets bucket as follows (I'm trying with '*' to start just to get it working, and will narrow it down to my actual host when it appears to be doing anything):

<?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>

I also have a cross-origin resource sharing configuration in the bucket so that the fonts will correctly load for our stylesheets (This is working).

What am I doing wrong to make the button images load in the actionscript? Do I need to modify the actionscript code itself? The code is located here (public library anyone can use, not authored by me): s3-swf-upload-plugin

You can see here that it is instantiating a new browseButton defined here. Like I said I'm not totally familiar with actionscript but believe I could fumble through it if someone could show me what's going wrong :) What's a good way to get actual error reporting? Firebug in Firefox and Chrome's console don't have any kind of messages from Flash about errors going on.

EDIT:

There were some quirkinesses going on in the setting up of the flash object and setting the paths for the button images. I updated BrowseButton.as to do this:

Security.loadPolicyFile("http://s3.amazonaws.com/my-bucket/crossdomain.xml");

I placed this before any of the URLRequest calls in the BrowseButton() function. However it's still not displaying the images :( I also hardcoded the values in the URLRequest to be things like: 

upLoader.load(new URLRequest("http://s3.amazonaws.com/my-bucket/assets/s3_up_button.gif"));

but nothing seems to happen. When I set it to /assets/s3_up_button.gif to pull from the local file then it works fine. What am I doing wrong! How can I get error messages displaying from the flash video? :\ I compiled with <debug>true</debug> but I'm not sure how to get actual exception messages.

Upvotes: 1

Views: 1113

Answers (1)

Jude Fisher
Jude Fisher

Reputation: 11294

Check what sandbox your swf is in:

The Security.sandboxType property

An author of a SWF file can use the read-only static Security.sandboxType property to determine the type of sandbox to which Flash Player has assigned the SWF file. The Security class includes constants that represent possible values of the Security.sandboxType property, as follows:

Security.REMOTE--The SWF file is from an Internet URL, and operates under domain-based sandbox rules.
Security.LOCAL_WITH_FILE--The SWF file is a local file, but it has not been trusted by the user and was not published with a networking designation. The SWF file can read from local data sources but cannot communicate with the Internet.
Security.LOCAL_WITH_NETWORK--The SWF file is a local file and has not been trusted by the user, but it was published with a networking designation. The SWF can communicate with the Internet but cannot read from local data sources.
Security.LOCAL_TRUSTED--The SWF file is a local file and has been trusted by the user, using either the Settings Manager or a Flash Player trust configuration file. The SWF file can both read from local data sources and communicate with the Internet.

You probably want Security.LOCAL_WITH_NETWORK, although Security.LOCAL_TRUSTED will also work.

An explanation, along with details of how to set the sandbox in Flex, is here: http://livedocs.adobe.com/flex/3/html/help.html?content=05B_Security_04.html

If you're working in the Flash IDE, it should just be part of the publish settings.

Upvotes: 1

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