[jira] [Issue Comment Deleted] (TIKA-1485) Wrong mimetype detection

["Konstantin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TIKA-1485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin updated TIKA-1485:
-----------------------------
    Comment: was deleted

(was: {quote}If Tika doesn't know what something is from the mime magic (or from container detectors), but there is a matching hint from the file extension, then the extension will be used to guess the type{quote}
that's wrong logic in my opinion)

> Wrong mimetype detection
> ------------------------
>
>                 Key: TIKA-1485
>                 URL: https://issues.apache.org/jira/browse/TIKA-1485
>             Project: Tika
>          Issue Type: Bug
>    Affects Versions: 1.5, 1.6
>            Reporter: Konstantin
>         Attachments: file.jpg, file_corrupted, file_corrupted.jpg, jpg_file
>
>
> [SCENARIO]
>  # get a valid jpg (almost all file types that have a header are affected).
>  # insert some whitespaces or line breaks in the beginning of file (it becomes invalid)
>  # check file mimetype:
> {code}
>         Metadata metadata = new Metadata();
>         metadata.set(Metadata.RESOURCE_NAME_KEY, file.toString());
>         MediaType mimetype = new TikaConfig().getDetector().detect(TikaInputStream.get(file), metadata);
> {code}
> [RESULT]
>  detected mimetype is "image/jpeg"
> [EXPECTED]
> "application/octet-stream"



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