issue with WebView in 8u202

Mon Nov 19 20:20:03 UTC 2018

(relates to MS Windows, at least)


On 11/19/2018 11:17 PM, Anton Tarasov wrote:
> Hello, JFX team!
>
> We (at JetBrains) faced an issue with WebView after we've moved to an 
> JFX update in JDK8u202. The issue is that WebView stopped loading 
> images referenced by an absolute URL under some circumstances.
>
> Below is a real html content, produced by IDEA markdown viewer. It has 
> lots of style pre-loads and a sample image that it should eventually 
> display. The html is loaded view WebEngine.loadContent(..) but a 
> placeholder text is only displayed - that's the problem that can be 
> reproduce with JDK8u202. However it worked with JDK8u152.
>
> The style references will obviously fail for you, but if you put this 
> html into a file and will load it via 
> WebEngine.load(file:///path/to/file), the image will be shown with no 
> problem (in 8u202 as well).
>
> <html><head><meta http-equiv="Content-Security-Policy" 
> content="default-src 'none'; script-src 
> http://localhost:63344/api/markdown-preview/scripts/processLinks.js?_ijt=ujioejund46k8cmdcsuggbpnf3 
> http://localhost:63344/api/markdown-preview/scripts/scrollToElement.js?_ijt=ujioejund46k8cmdcsuggbpnf3; 
> style-src https: 
> http://localhost:63344/api/markdown-preview/styles/default.css?_ijt=ujioejund46k8cmdcsuggbpnf3 
> http://localhost:63344/api/markdown-preview/styles/darcula.css?_ijt=ujioejund46k8cmdcsuggbpnf3 
> http://localhost:63344/api/markdown-preview/styles/inline.css?_ijt=ujioejund46k8cmdcsuggbpnf3; 
> img-src *; connect-src 'none'; font-src *; object-src 'none'; 
> media-src 'none'; child-src 'none';"/><link rel="stylesheet" 
> href="http://localhost:63344/api/markdown-preview/styles/default.css?_ijt=ujioejund46k8cmdcsuggbpnf3" 
> />
>
> <script 
> src="http://localhost:63344/api/markdown-preview/scripts/processLinks.js?_ijt=ujioejund46k8cmdcsuggbpnf3"></script>
> <script 
> src="http://localhost:63344/api/markdown-preview/scripts/scrollToElement.js?_ijt=ujioejund46k8cmdcsuggbpnf3"></script></head><body 
> md-src-pos="0..89"><p md-src-pos="0..88"><img 
> src="file:///C:/Users/tav/IdeaProjects/DummyProject/src/kitten.jpg" 
> alt="Kitten" title="A cute kitten" md-src-pos="0..88" 
> /></p></body></html>
>
> Then, if you remove all the style loading and leave only the image, 
> the image will be shown in either way: load(url) or loadContent (in 
> 8u202)
>
> <html><head></head><body md-src-pos="0..89"><p md-src-pos="0..88"><img 
> src="file:///C:/Users/tav/IdeaProjects/DummyProject/src/kitten.jpg" 
> alt="Kitten" title="A cute kitten" md-src-pos="0..88" 
> /></p></body></html>
>
> Sorry for not submitting the code, I hope you will easily put it into 
> a real demo (I played with JFX's WebViewApp).
>
> So, could you please advice on what went wrong with it?
>
> With regards,
> Anton.