.xsl file type is being detected as application/msword

[InfoLibre]

Attach the file for which the detection is inaccurate
You can use the file sharing site of your choice, just ensure the file will not expire or get deleted.

Bibliothèque de macros pour extraire des données de Baan.xls.zip

(unzip it to test)

Expected MIME type

application/vnd.ms-excel ?

Returned MIME type

application/msword

Version of the library you are using

1.4.0

Output of go version

go version go1.13.8 linux/amd64

Additional context

I'm using this code:

add_media.go.zip

[gabriel-vasile]

mimetype looks only at the first few bytes and sometimes the .xls signature is at the end of the file.
Try increasing readLimit:

// increase to 1MB, default is 3KB.
mimetype.SetLimit(1024 * 1024)
mimetype.DetectFile("file.xls")

[MrSwed]

mimetype.SetLimit(2048 * 2048)

xls.xls

not helped :(

here https://www.htmlstrip.com/mime-file-type-checker it detect correctly

[gabriel-vasile]

I can confirm the issue is fixed for the attached file when increasing ReadLimit:

mimetype.SetLimit(1024 * 1024)

so let me close this issue.