为什么ExternalInterface的休息，当我通过参数使用JSON字符串一样？

问题描述

我有一个很奇怪的问题与Flash 10和ExternalInterface的。我目前使用的是自制的桥梁使用RTMFP使用JavaScript，每当我试图通过一个包含JSON数据，我得到一个奇怪的JavaScript错误来自闪存：

I have a very odd problem with Flash 10 and ExternalInterface. I am currently using a homemade bridge to use RTMFP with Javascript and whenever I try to pass data that contains JSON, I get a wierd Javascript error that comes from Flash :

missing ) after argument list
try { __flash__toXML(Flash.Utilities.A..."")) ; } catch (e) { "<undefined/>"; }

这是不可能获得更多的信息，因为这来自于Flash和它没有绑定到任何JavaScript文件。

It's impossible to get more information since this come from Flash and it's not bound to any Javascript file.

要重现此问题，您可以使用此脚本：

To reproduce this problem you can use this script :

package 
{
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.external.ExternalInterface;

    public class Main extends Sprite 
    {

        public function Main():void 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }

        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);
            var test:String;

            test = "\"\\\"\"";

            ExternalInterface.call("console.log", test);
        }

    }

}

我能做些什么来避免这个问题，它是一个已知的问题？

What can I do to avoid this problem and is it a known problem ?

推荐答案

这显然是一个已知的问题，它似乎并不像Adobe将会很快解决它。

This is apparently a known issue and it doesn't seems like Adobe is going to fix it anytime soon.

我发现这个问题的相关详细交代并basicly这个问题似乎是，闪存没有按' T柄的 \ 和＆安培; 正确从而导致JavaScript错误或数据损坏，从Flash转移到中JavaScript的。

I found a detailled explaination of this problem and basicly the issue seems to be that Flash doesn't handle the \ and the & properly which can lead to javascript error or data corruption during the transfer from Flash to javascript.

什么闪光时，尝试从闪存数据传输到JS做的是执行以下的事情：

What Flash attempts to do when you transfer data from Flash to JS is to execute the following thing :

try {
    __flash__toXML(yourJavascriptFunction("[DATA]")) ;
} catch (e) { "<undefined/>"; }

现在的问题是，它使得你的数据的原始，它并没有逃脱反斜线的。如果字符串仅包含 \ ，你想叫的console.log 就可以了，它会尽量做到以下几点东西：

The problem is that it puts your data raw and it doesn't escape the backslash at all. If your string contains only \ and you want to call console.log on it, it will try to do the following thing :

try {
    __flash__toXML(console.log("\")) ;
} catch (e) { "<undefined/>"; }

正如你可以看到这是无效的JavaScript。它会引发错误在JavaScript控制台，它绝不会叫的console.log 。

该解决方案是ducktape闪存行为或做一些讨厌的黑客绕过它。

The solution is to either ducktape Flash behavior or do some nasty hack to get around it.

要ducktape闪存buggyness你能逃脱blackslash，然后他们转移。该解决方案将适用于现在，但在Flash将修复它（最有可能不是在不久的将来，如果考虑到这个错误是著名的4年以上），它会破坏你的应用程序。

To ducktape Flash buggyness you can escape the blackslash before you transfer them. This solution will work for now, but when Flash will fix it (most probably not in a near future, if you consider that this bug is known for more than 4 years), it will break your application.

另一种可能是给url EN code中的字符Flash不处理好（ \ ，，＆安培; ）和脱code他们在另一边

The other possibility is to url encode the character that Flash doesn't handle well (\, ", &) and to decode them on the other side.

闪存：

data = data.split("%").join("%25")
           .split("\\").join("%5c")
           .split("\"").join("%22")
           .split("&").join("%26");

JavaScript的：

data = data.replace(/%22/g, "\"")
           .replace(/%5c/g, "\\")
           .replace(/%26/g, "&")
           .replace(/%25/g, "%");

这是丑陋的，但它的作品。

It's ugly, but it works.

这篇关于为什么ExternalInterface的休息，当我通过参数使用JSON字符串一样？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！