Share a link to this question via email, Google+, Twitter, or Facebook. I want to release my software as open-source but prevent people from competing with my SaaS solution. asked 2 years ago viewed 11416 times active 2 months ago Linked 2 SecurityError: The operation is insecure in canvas.toDataURL 2 Canvas image crossplatform insecure error Related 4105Which equals operator (==
See here (the crossorigin attribute) for more details. Tainted Canvas Workaround This is particularly noticable on the answerer side of RTCPeerConnection because streams (should) appear immediately after setRemoteDescription, where you are guaranteed not to receive content from your peer. I understand that in this case canvas becomes tainted while it should not. This is due to not having CORS approval.
Since there is nothing I can do about the security error in IE, give an explicit message and swallow the exception. https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image Do I just need to wait longer before requesting the image? Canvas.todataurl Security Error Ie Multiple counters in the same list What is the rationale behind decltype behavior? Failed To Execute 'todataurl' On 'htmlcanvaselement' So maybe someone did something like this and knows how to make .toDataURL() work as I need it?
simonsarris.com Menu Skip to content Home Projects About Instagram Tumblr (Photography) Understanding the HTML5 Canvas image security rules 6 Replies There's a common point of confusion regarding when one can use http://wx2me.com/security-error/security-error-event-security-error-as3.php You can use this excerpt from the HTML5 Boilerplate Apache server configs to appropriately respond with this response header:
SSH makes all typed passwords visible when command is provided as an argument to the SSH command I came from a distant land How to explain the concept of test automation Img Crossorigin Reload to refresh your session. What game is this?
I always have this security problem when the codes were on different functions... =/ share|improve this answer answered Sep 18 '13 at 1:39 CarinaPilar 4441515 add a comment| up vote 1 It also works in Chrome. Once a canvas has been tainted, you can no longer pull data back out of the canvas. Tainted Canvases May Not Be Exported Chrome But there's a trick.
See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image See Also https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_settings_attributes Here's a Fiddle working with an Image: http://jsfiddle.net/mcepc44p/2/ var canvas = document.getElementById("canvas").getContext("2d"); var button = document.getElementById("button"); var image = new Image(); image.crossOrigin = "anonymous"; // This Content is available under these licenses. The server will almost certainly be able to receive the img.src then wget*/*cURL the image quicker than the client could encode a local-origin image and POST it to the server. http://wx2me.com/security-error/security-error-code-1000-ns-error-dom-security-err.php I have HTML5 video player with video loaded from another domain (ex.
The reason for this security is to prevent something called information leakage. See CORS settings attributes for details on how the crossorigin attribute is used. Although you can use images without CORS approval in your canvas, doing so taints the canvas. You signed in with another tab or window.
Maybe I'm doing it the wrong way and there is a simpler way to do it? For example, you can no longer use the canvas toBlob(), toDataURL(), or getImageData() methods; doing so will throw a security error. If the image is coming from another server I don't think you can use toDataURL() share|improve this answer answered Mar 5 '10 at 22:24 Bob 5,68242744 6 If an attacker But I'm not smart enough to work out a solution that doesn't also require major structural changes to RTP or RTCPeerConnection.
image.crossOrigin = "anonymous"; // This enables CORS –Sudi Jan 14 at 23:56 1 This shouldn't have been the accepted answer as it doesn't work with videos as the OP asked The trick here is that if you render inaccessible content to a canvas, it renders, but taints the canvas. From the moment a canvas has its origin-clean flag set to false, the getImageData() and toDataUrl() methods will throw security errors. What game is this?
You can read more about this here, but it essentially means: Although you can use images without CORS approval in your canvas, doing so taints the canvas. ID 1013555 Comments 5 Status Closed Workarounds 0 Type Bug Repros 0 Opened 10/28/2014 6:40:58 AM Access Restriction Public Description [Edit] Now I cannot add comments to this post anymore, for whatever Hot Network Questions The Last Monday Where I can learn Esperanto by Spanish? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed