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https://issues.apache.org/jira/browse/HADOOP-7532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087378#comment-13087378
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Aaron T. Myers commented on HADOOP-7532:
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bq. No, they're not enforced, you can easily turn off escaping with Jamon etc
with one character.
"They're enforced by default but easy to turn off" is quite different from
"they're not enforced." It seems to me the main differentiator Hamlet has in
this regard it that it's possible but exceptionally difficult to disable
escaping. I don't see this as terribly compelling.
bq. Another advantage I forgot to mention is the enforcement of HTML coding
guidelines (for style or security reasons), say forbid certain tags (font,
center etc.) and attributes (all the on* event attributes.). You cannot do this
in any existing template systems. period.
I didn't realize that. That is kind of neat.
bq. The old wheel is not round/secure/robust enough?
Which wheels did you check out and find to be not round enough? :) I previously
asked "Can you perhaps enumerate which existing libraries you looked at, and
why you ruled them out?"
bq. Which templating frameworks statically validates html for all possible
combination of queries?
I've used Twisted's templating framework fairly extensively, which does this. I
have much less experience with Java templating frameworks, so I don't know of a
Java one which has this feature, but I'd be surprised if one didn't already
exist.
All this said, my aim is honestly not to critique Hamlet. Like Eli, I assume
it's a good piece of work. I'm just trying to make sure that other pre-existing
options were thoroughly examined and found to be so insufficient as to warrant
writing a new templating engine. In HBASE-3835, Todd describes some of the
reasons why he went with Jamon in HBase. Does Hamlet fulfill all of those
requirements?
> Hadoop web UI 2.0
> -----------------
>
> Key: HADOOP-7532
> URL: https://issues.apache.org/jira/browse/HADOOP-7532
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 0.23.0
> Reporter: Luke Lu
> Assignee: Luke Lu
> Fix For: 0.23.0
>
>
> People have expressed interests of bringing Hadoop web UI up to date with the
> lightweight embedded web mvc framework used in MAPREDUCE-279 (cf.
> MAPREDUCE-2399). This is the umbrella jira for UI improvement for 0.23+.
> Individual items like web framework refactor/move and the unique challenge
> for MR2 webapp security will be filed separately.
> Thoughts/ideas on various improvement of Hadoop web UI are welcome here. Some
> of the ideas will naturally become sub-issues.
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