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http://jira.codehaus.org/browse/MINDEXER-13?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=261524#action_261524
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Jesse Glick commented on MINDEXER-13:
-------------------------------------
Some experimentation reveals that httpd 2.2.9 will set this header if
{{AddEncoding x-gzip .gz}} is specified in {{httpd.conf}}. That directive is
not enabled by default, but it is suggested in a commented-out block:
{noformat}
# AddEncoding allows you to have certain browsers uncompress
# information on the fly. Note: Not all browsers support this.
#
#AddEncoding x-compress .Z
#AddEncoding x-gzip .gz .tgz
{noformat}
There is no indication in these comments (or the manual) that using the
directive violates any RFC, and it seems likely enough that some admin or
another would have uncommented such a directive at some point for some reason,
without having any clue this might affect Maven indices. The Indexer would do
well to behave gracefully in this case.
Workaround (without full server admin access) seems to be to create
{{.index/.htaccess}} with
{noformat}
RemoveEncoding .gz
{noformat}
> *.gz index not loadable using default LightweightHttpWagon
> ----------------------------------------------------------
>
> Key: MINDEXER-13
> URL: http://jira.codehaus.org/browse/MINDEXER-13
> Project: Maven Indexer
> Issue Type: Bug
> Affects Versions: 4.0.0
> Environment: Ubuntu, JDK 6u24
> Reporter: Jesse Glick
> Attachments: MINDEXER.diff
>
>
> If you create a new-style index (without {{--legacy}}), publish on an HTTP
> server (Apache 2.2.9 in my case), and try to download the remote index from a
> client using the default {{LightweightHttpWagon}}, the download fails.
> The wagon upon seeing {{Content-Encoding: gzip}} automatically decompresses
> the index and serves the raw data. {{IndexDataReader}} then passes this to
> {{GZIPInputStream}} which chokes. (MINDEXER-12 then conceals the actual
> problem and makes it look like the indexer only accepts the legacy format.)
> Have a patch which seems to work. Probably
> {{DownloadRemoteIndexerManagerTest}} needs to be enhanced to check this case;
> I am not very familiar with Jetty so I have not tried this yet.
> (Nexus sends {{Content-Type: application/x-compressed}} but no content
> encoding so the problem is not visible when using a Nexus mirror.)
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