search

adobe / htl-spec

HTML Template Language Specification
Apache License 2.0
281 stars 145 forks source link

Clarify 'scriptToken' context #61

Closed kwin closed 6 years ago

kwin commented 6 years ago

Currently the only description for the context scriptContext is

Outputs nothing if the value doesn't correspond to the JavaScript token syntax

(https://github.com/Adobe-Marketing-Cloud/htl-spec/blob/master/SPECIFICATION.md#121-display-context)

What exactly is considered a JavaScript token here? Does it refer to https://www.ecma-international.org/ecma-262/8.0/index.html#prod-CommonToken? If so, then the implementation does not accept everything which is considered a common token according to the spec (e.g. { is a valid common token according to ECMA, defined in Punctuator, but not accepted by https://github.com/apache/sling-org-apache-sling-xss/blob/43947bd638d73e4595dea49972049e560c409b06/src/main/java/org/apache/sling/xss/impl/XSSAPIImpl.java#L257).

raducotescu commented 6 years ago

@kwin, the scriptContext can only be used for Identifiers and String and Numeric literals. JavaScript templates conflict with HTL expressions (so it's extremely difficult to validate something like that) and Punctuators are not something you'd really want to output as a single token from HTL I guess.

I'll add this piece of info to the specification.

kwin commented 6 years ago

@raducotescu Thanks for the quick fix.