Go File Signature Validator

Install

$ go get github.com/telkomdev/go-filesig

Usage

package main
import (
	"fmt"
	"github.com/telkomdev/go-filesig"
	"os"
)
func main() {
	args := os.Args
	if len(args) < 2 {
		fmt.Println("required input file")
		os.Exit(1)
	}
	inputFileArg := args[1]
	inFile, err := os.Open(inputFileArg)
	if err != nil {
		fmt.Println("error open input file ", err)
		os.Exit(1)
	}
	defer func() { inFile.Close() }()
	valid := filesig.Is3gp(inFile)
	fmt.Println(valid)

package main
import (
	"fmt"
	"github.com/telkomdev/go-filesig"
	"os"
)
func main() {
	args := os.Args
	if len(args) < 2 {
		fmt.Println("required input file")
		os.Exit(1)
	}
	inputFileArg := args[1]
	inFile, err := os.Open(inputFileArg)
	if err != nil {
		fmt.Println("error open input file ", err)
		os.Exit(1)
	}
	defer func() { inFile.Close() }()
	valid := filesig.IsOneOf(inFile, filesig.Is3gp, filesig.IsPng, filesig.IsJpeg)
	fmt.Println(valid)
}

package main
import (
	"fmt"
	"github.com/telkomdev/go-filesig"
	"net/http"
)
func uploadFile(w http.ResponseWriter, r *http.Request) {
	fmt.Println("File Upload Endpoint Hit")
	// Parse our multipart form, 10 << 20 specifies a maximum
	// upload of 10 MB files.
	r.ParseMultipartForm(10 << 20)
	// FormFile returns the first file for the given key `myFile`
	// it also returns the FileHeader so we can get the Filename,
	// the Header and the size of the file
	file, handler, err := r.FormFile("myFile")
	if err != nil {
		fmt.Println("Error Retrieving the File")
		fmt.Println(err)
		return
	}
	defer file.Close()
	fmt.Printf("Uploaded File: %+v\n", handler.Filename)
	fmt.Printf("File Size: %+v\n", handler.Size)
	fmt.Printf("MIME Header: %+v\n", handler.Header)
	// validate file
	validPdf := filesig.IsPdf(file)
	if !validPdf {
		fmt.Print("file is not valid PDF file \n")
	}
	// return that we have successfully uploaded our file!
	fmt.Fprintf(w, "Successfully Uploaded File\n")
}
func setupRoutes() {
	http.HandleFunc("/upload", uploadFile)
	http.ListenAndServe(":8000", nil)
}
func main() {
	fmt.Println("Hello World")
	setupRoutes()
}