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https://issues.apache.org/jira/browse/LOG4J2-1848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Sicker closed LOG4J2-1848.
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Resolution: Fixed
Fix Version/s: 2.8.2
Added to master.
> Add JSON encoding support to EncodingPatternConverter %encode{}.
> ----------------------------------------------------------------
>
> Key: LOG4J2-1848
> URL: https://issues.apache.org/jira/browse/LOG4J2-1848
> Project: Log4j 2
> Issue Type: New Feature
> Components: Layouts
> Reporter: Matt Sicker
> Assignee: Matt Sicker
> Fix For: 2.8.2
>
>
> The existing implementation of EncodingPatternConverter is for escaping
> output for HTML specifically. This pattern converter should be extended to
> allow multiple types of encoding. The existing HTML behavior should be the
> default, but an optional second parameter should be added to allow specifying
> a different format to encode for.
> For JSON, encoding would require the following:
> {noformat}
> The representation of strings is similar to conventions used in the C
> family of programming languages. A string begins and ends with
> quotation marks. All Unicode characters may be placed within the
> quotation marks except for the characters that must be escaped:
> quotation mark, reverse solidus, and the control characters (U+0000
> through U+001F).
> Any character may be escaped. If the character is in the Basic
> Multilingual Plane (U+0000 through U+FFFF), then it may be
> represented as a six-character sequence: a reverse solidus, followed
> by the lowercase letter u, followed by four hexadecimal digits that
> encode the character's code point. The hexadecimal letters A though
> F can be upper or lowercase. So, for example, a string containing
> only a single reverse solidus character may be represented as
> "\u005C".
> Alternatively, there are two-character sequence escape
> representations of some popular characters. So, for example, a
> string containing only a single reverse solidus character may be
> represented more compactly as "\\".
> To escape an extended character that is not in the Basic Multilingual
> Plane, the character is represented as a twelve-character sequence,
> encoding the UTF-16 surrogate pair. So, for example, a string
> containing only the G clef character (U+1D11E) may be represented as
> "\uD834\uDD1E".
> {noformat}
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