64813 2011-07-19 11:05:21 -0700 HTMLImageElement::crossOrigin is hard to use because of caching 2011-07-22 17:18:53 -0700 1 1 1 Unclassified WebKit Page Loading 528+ (Nightly build) All All RESOLVED FIXED P2 Normal --- 1 abarth kbr ap japhet kbr webkit.review.bot oldest_to_newest 439263 0 abarth 2011-07-19 11:05:21 -0700 The crossorigin attribute of HTMLImageElement is hard to use correctly because image responses are often cached. For example, consider the case where the server always response with the following header: Access-Control-Allow-Origin: * If we request the image first without the crossorigin attribute, then we'll send credentials and cache the response in the MemoryCache. Later, if we request the image with the crossorigin attribute, we'll grab the response out of the MemoryCache, but the CORS check will fail because we'll remember that we sent credentials the first time. This behavior can be frustrating for web developers who don't understand why the second request isn't allowed. After all, they said their image was allowed by *. One possible solution to this problem is to examine the allowCredentials flag when deciding whether the resource in the MemoryCache is appropriate for the given request. The CachedResourceLoader and CachedResource have a bunch of logic for deciding whether an existing CachedResource is valid for a new request or whether we should evict it and request the resource again. We could try fixing this issue by including logic to compare the allowCredentials flag in this code path. 440763 1 kbr 2011-07-21 17:59:53 -0700 Looking into this. 441221 2 101779 kbr 2011-07-22 15:32:06 -0700 Created attachment 101779 Patch 441223 3 101779 abarth 2011-07-22 15:34:19 -0700 Comment on attachment 101779 Patch Look great. Thanks! 441292 4 101779 webkit.review.bot 2011-07-22 17:18:49 -0700 Comment on attachment 101779 Patch Clearing flags on attachment: 101779 Committed r91626: <http://trac.webkit.org/changeset/91626> 441293 5 webkit.review.bot 2011-07-22 17:18:53 -0700 All reviewed patches have been landed. Closing bug. 101779 2011-07-22 15:32:06 -0700 2011-07-22 17:18:49 -0700 Patch bug-64813-20110722153205.patch text/plain 7602 kbr SW5kZXg6IFNvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDkxNjExKQorKysgU291cmNlL1dlYkNvcmUvQ2hhbmdl TG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsMTkgQEAKKzIwMTEtMDctMjIgIEtlbm5ldGgg UnVzc2VsbCAgPGtickBnb29nbGUuY29tPgorCisgICAgICAgIEhUTUxJbWFnZUVsZW1lbnQ6OmNy b3NzT3JpZ2luIGlzIGhhcmQgdG8gdXNlIGJlY2F1c2Ugb2YgY2FjaGluZworICAgICAgICBodHRw czovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9NjQ4MTMKKworICAgICAgICBSZXZp ZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBSZWxvYWQgdGhlIHJlc291cmNlIGlm IHRoZSBhbGxvd0NyZWRlbnRpYWxzIGZsYWcgZG9lc24ndCBtYXRjaCB0aGF0IGluIHRoZSByZXF1 ZXN0LgorCisgICAgICAgIFRlc3Q6IGh0dHAvdGVzdHMvc2VjdXJpdHkvY2FudmFzLXJlbW90ZS1y ZWFkLXJlbW90ZS1pbWFnZS1ibG9ja2VkLXRoZW4tYWxsb3dlZC5odG1sCisKKyAgICAgICAgKiBs 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