Compare different mimetype detector

compare.md

Path	Valid	Reference	File	Perl	Go
3mf.3mf 🔎	application/vnd.ms-package.3dmanufacturing-3dmodel+xml	https://en.wikipedia.org/wiki/3D_Manufacturing_Format	text/xml	application/xml	application/vnd.ms-package.3dmanufacturing-3dmodel+xml
aac.aac 🔎	audio/aac	https://en.wikipedia.org/wiki/Advanced_Audio_Coding	audio/x-hx-aac-adts	audio/aac	audio/aac
aaf.aaf 🔎			application/cdfv2	application/x-ole-storage	application/octet-stream
accdb.accdb 🔎			application/x-msaccess	application/octet-stream	application/x-msaccess
aiff.aiff 🔎			audio/x-aiff	audio/x-aiff	audio/aiff
amf.amf 🔎			text/xml	application/xml	application/x-amf
ape.ape 🔎			audio/x-ape	audio/x-ape	audio/ape
asf.asf 🔎			video/x-ms-asf	application/vnd.ms-asf	video/x-ms-asf
atom.atom 🔎			text/xml	application/atom+xml	application/atom+xml
audio.mp4 🔎			audio/mp4	video/mp4	audio/mp4
avif.avif 🔎			application/octet-stream	image/avif	application/octet-stream
avifsequence.avif 🔎			application/octet-stream	image/avif	application/octet-stream
bad.dbf 🔎			application/octet-stream	application/x-dbf	application/octet-stream
bpg.bpg 🔎			image/bpg	application/octet-stream	image/bpg
bz2.bz2 🔎			application/x-bzip2	application/x-bzip	application/x-bzip2
class.class 🔎			application/x-java-applet	application/x-java	application/x-java-applet
cpio.cpio 🔎			application/octet-stream	application/x-cpio	application/x-cpio
crx.crx 🔎			application/x-chrome-extension	application/octet-stream	application/x-chrome-extension
csv.csv 🔎			text/plain	text/csv	text/csv
dae.dae 🔎			text/xml	application/xml	model/vnd.collada+xml
djvu.djvu 🔎			image/vnd.djvu	image/vnd.djvu+multipage	image/vnd.djvu
eot.eot 🔎			application/vnd.ms-fontobject	application/octet-stream	application/vnd.ms-fontobject
exe.exe 🔎			application/x-dosexec	application/x-ms-dos-executable	application/vnd.microsoft.portable-executable
fdf.fdf 🔎			application/vnd.fdf	text/x-matlab	application/vnd.fdf
fits.1.fits 🔎			image/fits	image/fits	application/fits
fits.fits 🔎			image/fits	image/fits	application/fits
geojson.1.geojson 🔎			application/json	application/geo+json	application/geo+json
geojson.geojson 🔎			application/json	application/geo+json	application/geo+json
glb.glb 🔎			application/octet-stream	application/octet-stream	model/gltf-binary
gml.gml 🔎			text/xml	application/gml+xml	application/gml+xml
gpx.gpx 🔎			text/xml	application/gpx+xml	application/gpx+xml
har.har 🔎			application/json	text/plain	application/json
hdr.hdr 🔎			application/octet-stream	text/x-mpsub	image/vnd.radiance
heic.single.heic 🔎			image/heic	image/heif	image/heic
ico.ico 🔎			image/vnd.microsoft.icon	image/vnd.microsoft.icon	image/x-icon
jar.jar 🔎			application/java-archive	application/x-java-archive	application/jar
js.js 🔎			text/x-c	application/javascript	application/javascript
jxl.jxl 🔎			application/octet-stream	application/octet-stream	image/jxl
kml.kml 🔎			text/xml	application/vnd.google-earth.kml+xml	application/vnd.google-earth.kml+xml
lit.lit 🔎			application/x-ms-reader	application/octet-stream	application/x-ms-reader
lnk.lnk 🔎			application/octet-stream	application/octet-stream	application/x-ms-shortcut
lz.lz 🔎			application/x-lzip	application/x-lzip	application/lzip
m3u.m3u 🔎			text/plain	audio/x-mpegurl	application/vnd.apple.mpegurl
m4a.m4a 🔎			audio/x-m4a	audio/mp4	audio/x-m4a
macho.macho 🔎			application/x-mach-binary	application/x-java	application/x-mach-binary
mdb.mdb 🔎			application/x-msaccess	application/vnd.ms-access	application/x-msaccess
mobi.mobi 🔎			application/octet-stream	application/x-mobipocket-ebook	application/x-mobipocket-ebook
mpc.mpc 🔎			audio/x-musepack	audio/x-musepack	audio/musepack
mqv.mqv 🔎			video/quicktime	application/octet-stream	video/quicktime
mrc.mrc 🔎			application/octet-stream	text/plain	application/marc
msg.msg 🔎			application/vnd.ms-outlook	application/x-ole-storage	application/vnd.ms-outlook
msi.msi 🔎			application/x-msi	application/x-msi	application/x-ms-installer
ndjson.ndjson 🔎			application/json	text/plain	application/x-ndjson
ndjson.xl.ndjson 🔎			application/json	text/plain	application/x-ndjson
nes.nes 🔎			application/x-nes-rom	application/x-nes-rom	application/vnd.nintendo.snes.rom
ogg.oga 🔎			audio/ogg	audio/x-vorbis+ogg	audio/ogg
ogg.spx.oga 🔎			audio/ogg	audio/x-speex+ogg	audio/ogg
otf.otf 🔎			application/vnd.ms-opentype	application/vnd.oasis.opendocument.formula-template	font/otf
owl2.owl 🔎			text/xml	application/rdf+xml	application/owl+xml
p7s_der.p7s 🔎			application/octet-stream	application/pkcs7-signature	application/pkcs7-signature
p7s_pem.p7s 🔎			text/plain	application/pkcs7-signature	application/pkcs7-signature
php.php 🔎			text/plain	application/x-php	text/x-php
pl.pl 🔎			text/x-perl	application/x-perl	text/x-perl
pub.pub 🔎			application/vnd.ms-office	application/vnd.ms-publisher	application/vnd.ms-publisher
py.py 🔎			text/x-script.python	text/x-python	application/x-python
qcp.qcp 🔎			application/octet-stream	application/x-riff	audio/qcelp
rar.rar 🔎			application/x-rar	application/vnd.rar	application/x-rar-compressed
rmvb.rmvb 🔎			application/vnd.rn-realmedia	application/vnd.rn-realmedia	application/vnd.rn-realmedia-vbr
rss.rss 🔎			text/xml	application/rss+xml	application/rss+xml
rtf.rtf 🔎			text/rtf	application/rtf	text/rtf
sample32.macho 🔎			application/x-mach-binary	application/octet-stream	application/x-mach-binary
sample64.macho 🔎			application/x-mach-binary	application/octet-stream	application/x-mach-binary
sqlite.sqlite 🔎			application/x-sqlite3	application/vnd.sqlite3	application/vnd.sqlite3
svg.1.svg 🔎			text/plain	image/svg+xml	text/html
swf.swf 🔎			application/x-shockwave-flash	application/vnd.adobe.flash.movie	application/x-shockwave-flash
tcl.tcl 🔎			text/x-tcl	text/tcl	text/x-tcl
tcx.tcx 🔎			text/xml	application/xml	application/vnd.garmin.tcx+xml
tsv.tsv 🔎			text/plain	text/tab-separated-values	text/tab-separated-values
ttf.ttf 🔎			font/sfnt	font/ttf	font/ttf
tzfile 🔎			application/octet-stream	application/octet-stream	application/tzif
voc.voc 🔎			audio/x-unknown	audio/x-voc	audio/x-unknown
warc.warc 🔎			application/warc	text/plain	application/warc
wasm.wasm 🔎			application/octet-stream	application/octet-stream	application/wasm
wav.wav 🔎			audio/x-wav	audio/x-wav	audio/wav
woff.woff 🔎			application/octet-stream	font/woff	font/woff
woff2.woff2 🔎			application/octet-stream	font/woff2	font/woff2
x3d.x3d 🔎			model/x3d+xml	application/xml	model/x3d+xml
xfdf.xfdf 🔎			text/xml	application/xml	application/vnd.adobe.xfdf
xlf.xlf 🔎			text/xml	application/xliff+xml	application/x-xliff+xml
xlsx.1.xlsx 🔎			application/octet-stream	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
xml.withbr.xml 🔎			text/plain	application/xml	text/xml
xml.xml 🔎			text/xml	application/xml	text/xml
xpm.xpm 🔎			image/x-xpmi	image/x-xpixmap	image/x-xpixmap

package main

import (
	"fmt"
	"mime"
	"net/url"
	"os"
	"os/exec"
	"path/filepath"
	"strings"

	"github.com/gabriel-vasile/mimetype"
)

func ExtensionName(s string) string {
	n := strings.LastIndexByte(s, '.')
	return s[n+1:]
}

func BaseName(s string) string {
	n := strings.LastIndexByte(s, '/')
	return s[n+1:]
}

func listTestFiles() []string {
	var files []string

	err := filepath.Walk("./testdata", func(path string, info os.FileInfo, err error) error {
		if !info.IsDir() {
			files = append(files, path)
		}
		return nil
	})
	if err != nil {
		panic(err)
	}
	return files
}

// sudo apt install libfile-mimeinfo-perl
func fileMIMETypePerl(path string) (string, error) {
	out, err := exec.Command("mimetype", "-b", path).Output()
	if err != nil {
		return "", err
	}

	return strings.TrimSpace(strings.ToLower(string(out))), nil
}

// sudo apt install file
func fileMIMETypeFile(path string) (string, error) {
	out, err := exec.Command("file", "-b", "--mime-type", path).Output()
	if err != nil {
		return "", err
	}

	return strings.TrimSpace(strings.ToLower(string(out))), nil
}

// native golang
func fileMIMETypeGo(path string) (string, error) {
	mimeTypeObject, err := mimetype.DetectFile(path)
	if err != nil {
		return "", err
	}

	mediaType, _, err := mime.ParseMediaType(mimeTypeObject.String())
	if err != nil {
		return "", err
	}

	return mediaType, nil

}

func main() {
	fmt.Println("| Path | Valid | Reference | File | Perl | Go |")
	fmt.Println("| --- | --- | --- | --- | --- | --- |")
	lines1 := []string{}
	lines2 := []string{}
	for _, path := range listTestFiles() {
		mimeFile, _ := fileMIMETypeFile(path)
		mimePerl, _ := fileMIMETypePerl(path)
		mimeGo, _ := fileMIMETypeGo(path)
		diff := (mimeGo != mimePerl || mimePerl != mimeFile)
		// diffWord := ""
		// if diff {
		// 	diffWord = "Yes"
		// }

		googleQuery := "." + url.QueryEscape(ExtensionName(path)+" file extension mime type")

		line := fmt.Sprintf("| %s [🔎](https://www.google.com/search?q=%s) | | | %s | %s | %s |\n", BaseName(path), googleQuery, mimeFile, mimePerl, mimeGo)

		if diff {
			lines1 = append(lines1, line)
		} else {
			lines2 = append(lines2, line)
		}
	}

	for _, l := range lines1 {
		fmt.Print(l)
	}
	// same result
	// for _, l := range lines2 {
	// 	fmt.Print(l)
	// }
}