File format determination package for Go

fleep is a package that determines file format by file signature (also known as "magic number").

You can download the source using go get command:

go get github.com/floyernick/fleep-go

Main function GetInfo() determines file format. It takes byte sequence (>=128) as an argument and returns Info structure.

Info has the following fields:

• Type ([]string) -> list of suitable file types
• Extension ([]string) -> list of suitable file extensions
• Mime ([]string) -> list of suitable file MIME types

Also Info has the following methods:

• TypeMatches() -> checks if file type matches with given type as an argument
• ExtensionMatches() -> checks if file extension matches with given extension as an argument
• MimeMatches() -> checks if file MIME type matches with given MIME type as an argument

There is an example:

package main

import (
	"fleep"
	"fmt"
	"io/ioutil"
)

func main() {
	file, _ := ioutil.ReadFile("gopher.png")      // Reads PNG file
	info, _ := fleep.GetInfo(file)                // Gets file format
	fmt.Println(info.Type)                        // Prints [raster-image]
	fmt.Println(info.Extension)                   // Prints [png]
	fmt.Println(info.Mime)                        // Prints [image/png]
	fmt.Println(info.TypeMatches("raster-image")) // Prints true
	fmt.Println(info.ExtensionMatches("jpg"))     // Prints false
	fmt.Println(info.MimeMatches("image/png"))    // Prints true
}

There is a list of supported formats (in alphabetical order):

Raster Image:

• BMP
• GIF
• ICO
• JP2
• JPEG
• PNG
• PSD
• TIFF
• WEBP

Raw Image:

• ARW
• CR2
• CRW
• DNG
• ERF
• NEF
• NRW
• ORF
• PEF
• RAF
• RAW
• RW2
• SRW
• X3F

Vector Image:

• AI
• EPS

3D Image:

• C4D
• FBX
• MA
• MS3D
• MTL
• OBJ
• PLY
• WRL
• X3D
• XSI

Audio:

• AAC
• AC3
• AIFF
• AMR
• AU
• FLAC
• M4A
• MIDI
• MKA
• MP3
• OGA
• RA
• VOC
• WAV
• WMA

Video:

• 3G2
• 3GP
• ASF
• AVI
• FLV
• M4V
• MKV
• MOV
• MP4
• MPG
• OGV
• SWF
• VOB
• WEBM
• WMV

Document:

• DOC
• DOCX
• EPUB
• KEY
• NUMBERS
• ODP
• ODS
• ODT
• PAGES
• PDF
• PPS
• PPT
• PPTX
• RTF
• XLS
• XLSX
• XML

Archive:

• 7Z
• DMG
• GZ
• ISO
• RAR
• TAR.Z
• ZIP

Executable:

• COM
• EXE
• JAR

Font:

• OTF
• TTF
• WOFF
• WOFF2

System:

• CAB
• CAT
• DLL
• DRV
• REG
• SDB
• SYS

Database:

• SQLITE

We would be happy to receive your propositions of improvement! Read Contributing Guide for more details.

This project is licensed under the MIT License.

Mykyta Paliienko - GitHub profile