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From "Nuutti Kotivuori (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COUCHDB-887) _log handler has very odd semantics for bytes/offset, probably a bug
Date Tue, 14 Sep 2010 03:27:33 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909103#action_12909103
] 

Nuutti Kotivuori commented on COUCHDB-887:
------------------------------------------

The *current* semantics of offset are such, that there is really no point in specifying it,
ever, as one can just supply a smaller bytes value to get the same effect.

If offset is simply substracted from LogFileSize, then offset *must* atleast default to bytes,
or otherwise the result is always eof.

> _log handler has very odd semantics for bytes/offset, probably a bug
> --------------------------------------------------------------------
>
>                 Key: COUCHDB-887
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-887
>             Project: CouchDB
>          Issue Type: Bug
>          Components: HTTP Interface
>    Affects Versions: 0.11, 0.11.1, 0.11.2, 1.0, 1.0.1
>            Reporter: Nuutti Kotivuori
>            Priority: Trivial
>         Attachments: couch_log.erl.diff
>
>
> The _log method for couchdb servers has query arguments "bytes" and "offset", but they
seem to behave really weirdly. If offset >= bytes, an eof error is returned - otherwise
offset is just substracted from bytes and the request behaves identically otherwise.
> A simple fix to the expected behaviour is included - offset counts backwards from bytes.

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