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Date: Sat, 22 Jun 2013 00:55:19 +0000 (UTC)
From: "Alexander Shorin (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
Message-ID: <JIRA.12654298.1371862406548.159349.1371862519989@arcas>
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Subject: [jira] [Created] (COUCHDB-1840) Better check for public_field value
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Alexander Shorin created COUCHDB-1840:
-----------------------------------------

             Summary: Better check for public_field value
                 Key: COUCHDB-1840
                 URL: https://issues.apache.org/jira/browse/COUCHDB-1840
             Project: CouchDB
          Issue Type: Improvement
            Reporter: Alexander Shorin


It's possible to run into issue COUCHDB-1838 and enable `public_fields` feature without actually specifying any public fields:

{code}
[couch_httpd_auth]
public_field = ,
{code}

Because of [split code|https://git-wip-us.apache.org/repos/asf?p=couchdb.git;a=blob;f=src/couchdb/couch_users_db.erl;h=9b875ba56d02d398049bb828015a37d219bcf6fd;hb=8d7ab8b18dd20f8785e69f4420c6f93a2edbfa60#l118]:
{code}
strip_non_public_fields(#doc{body={Props}}=Doc) ->
    Public = re:split(couch_config:get("couch_httpd_auth", "public_fields", ""),
                       "\\s*,\\s*", [{return, binary}]),
    Doc#doc{body={[{K, V} || {K, V} <- Props, lists:member(K, Public)]}}.
{code}

The parameter's value as comma (`,`) will produce empty Public list. Probably, it's better to check him for any members and/or strip all empty string members before counting `public_fields` parameter activated.

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