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Posted to dev@tika.apache.org by "Chris A. Mattmann (JIRA)" <ji...@apache.org> on 2010/01/20 03:01:54 UTC

[jira] Created: (TIKA-366) Increase buffer size for mime type sniffing

Increase buffer size for mime type sniffing
-------------------------------------------

                 Key: TIKA-366
                 URL: https://issues.apache.org/jira/browse/TIKA-366
             Project: Tika
          Issue Type: Improvement
          Components: mime
    Affects Versions: 0.5
         Environment: My local MacBook pro laptop.
            Reporter: Chris A. Mattmann
            Assignee: Chris A. Mattmann
             Fix For: 0.6


While working on TIKA-357 to address a similar problem for charset detection, I found an issue with mime identification having to do with the same general problem. Tika right now only deals with the first MimeTypes#getMinLength() bytes of a magic header to do the sniffing of mime type. With the example file attached from Ken Krugler, it's clear that the current min length size of 4 * 1024 bytes isn't enough. Extending it to 8K (8 * 1024 bytes) addresses this issue and seems to open up more opportunity for mime detection at little overhead cost.

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[jira] Resolved: (TIKA-366) Increase buffer size for mime type sniffing

Posted by "Chris A. Mattmann (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/TIKA-366?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris A. Mattmann resolved TIKA-366.
------------------------------------

    Resolution: Fixed

- fixed in r901033

> Increase buffer size for mime type sniffing
> -------------------------------------------
>
>                 Key: TIKA-366
>                 URL: https://issues.apache.org/jira/browse/TIKA-366
>             Project: Tika
>          Issue Type: Improvement
>          Components: mime
>    Affects Versions: 0.5
>         Environment: My local MacBook pro laptop.
>            Reporter: Chris A. Mattmann
>            Assignee: Chris A. Mattmann
>             Fix For: 0.6
>
>
> While working on TIKA-357 to address a similar problem for charset detection, I found an issue with mime identification having to do with the same general problem. Tika right now only deals with the first MimeTypes#getMinLength() bytes of a magic header to do the sniffing of mime type. With the example file attached from Ken Krugler, it's clear that the current min length size of 4 * 1024 bytes isn't enough. Extending it to 8K (8 * 1024 bytes) addresses this issue and seems to open up more opportunity for mime detection at little overhead cost.

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