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https://issues.apache.org/jira/browse/TIKA-4431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17956103#comment-17956103
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Tim Allison commented on TIKA-4431:
-----------------------------------
Thank you for opening this. It looks like we're truncating the potential uri
anchor here:
https://github.com/apache/tika/blob/main/tika-core/src/main/java/org/apache/tika/mime/MimeTypes.java#L545
And yet here
(https://github.com/apache/tika/blob/main/tika-core/src/main/java/org/apache/tika/detect/NameDetector.java#L117),
because of TIKA-3783, we're careful not to remove the anchor chunk if there's
a period after it.
:/
> Mime Type Detection Error with File Name containing Number Sign
> ----------------------------------------------------------------
>
> Key: TIKA-4431
> URL: https://issues.apache.org/jira/browse/TIKA-4431
> Project: Tika
> Issue Type: Bug
> Components: core
> Reporter: knoobie
> Priority: Major
>
> I noticed that changing the file name to include a number sign / hashtag (#)
> changes the mime type detection.
> For example, "Lorem-Ipsum.csv" correctly parses to "text/csv" but once
> "Lorem-Ipsum#123.csv" is given (with the same file content) the parser
> detects "text/plain".
>
> {code:java}
> import static org.assertj.core.api.Assertions.assertThat;
> import java.nio.charset.StandardCharsets;
> import org.apache.tika.Tika;
> import org.junit.jupiter.api.Test;
> public class ApacheTikaTest {
> @Test
> void detect_normalFileName() {
> var tika = new Tika();
> var fileName = "Lorem-Ipsum.csv";
> var data = """
> Lorem;Ipsum;
> 1 ;2 ;
> 3 ;4 ;
> """;
> assertThat(tika.detect(data.getBytes(StandardCharsets.UTF_8), fileName))
> .isEqualTo("text/csv");
> }
> @Test
> void detect_FileNameWithHashtag() {
> var tika = new Tika();
> var fileName = "Lorem-Ipsum#123.csv";
> var data = """
> Lorem;Ipsum;
> 1 ;2 ;
> 3 ;4 ;
> """;
> assertThat(tika.detect(data.getBytes(StandardCharsets.UTF_8), fileName))
> // Fails with result: 'text/plain'
> .isEqualTo("text/csv");
> }
> }
> {code}
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