I would like to allow:
<img src="data:image/jpg;base64,..."/>
I see there's documentation on how to do this but I don't understand how to implement it. I tried to add the pattern
.allowUrlProtocols("data")
.allowAttributes("src").matching(Pattern.compile("$data:image.*")).onElements("img")
But that didn't work. I understand the pattern must be a regex expression but I'm not sure I understand how it all links up. I get that it's trying to look for img tags and then looks at the src attribute. My understanding is that it should then look for the string data:image and if finds that allows it through. But that's not happening...
If you got here (like I did) but you are using the HTMLSanitizer for C#, then the answer is:
var sanitizer = new HtmlSanitizer();
sanitizer.AllowedSchemes.Add("data");
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