Canvas.toDataURL()引发安全异常 [英] Canvas.toDataURL() throws security exception

问题描述

嗨！
我有一个HTML页面，上面有一个画布.我正在尝试将画布转换为图像.实际上，当它在本地IIS服务器上时，它可以工作.
但是，当我将其作为独立的hmtl文件运行时，它不起作用.当我在谷歌浏览器上调试它时，出现以下异常.

行:

Hi!
I''ve a html page that has a canvas on it. I''m trying to convert canvas to image. Actually it works when its on local IIS server.
However , it doesnt work when i run it as a independent hmtl file. When i debugged it on google chrome i get following exception.

Line:

var strData = oScaledCanvas.toDataURL("image/png")

异常:未捕获的错误:SECURITY_ERR:DOM异常18

我想画布有一些安全限制.
我的问题是，如何避免这种异常?
或如何将本地html文件上的画布转换为图像?

Exception : Uncaught Error: SECURITY_ERR: DOM Exception 18

I guess, canvas has some security restrictions.
My question is , how can avoid this exception ?
Or how can i convert canvas on local html file to image ?

推荐答案

检查这些

解决WebGL跨域图像加载错误SECURITY_ERR:DOM异常18 [ ^ ]
未捕获的错误:SECURITY_ERR:DOM异常18 [

Check these

Resolving WebGL cross domain image loading error SECURITY_ERR: DOM Exception 18[^]
Uncaught Error: SECURITY_ERR: DOM Exception 18[^]

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