iso9660
A package for reading and creating ISO9660, forked from https://github.com/kdomanski/iso9660.
Requires Go 1.13 or newer.
Joliet and Rock Ridge extensions are not supported.
Examples
Extracting an ISO
package main
import (
"log"
"github.com/KarpelesLab/iso9660/isoutil"
)
func main() {
f, err := os.Open("/home/user/myImage.iso")
if err != nil {
log.Fatalf("failed to open file: %s", err)
}
defer f.Close()
if err = isoutil.ExtractImageToDirectory(f, "/home/user/target_dir"); err != nil {
log.Fatalf("failed to extract image: %s", err)
}
}
Creating an ISO
package main
import (
"log"
"os"
"github.com/KarpelesLab/iso9660"
)
func main() {
writer, err := iso9660.NewWriter()
if err != nil {
log.Fatalf("failed to create writer: %s", err)
}
// set volume name
writer.Primary.VolumeIdentifier = "testvol"
err = writer.AddLocalFile("/home/user/myFile.txt", "folder/MYFILE.TXT")
if err != nil {
log.Fatalf("failed to add file: %s", err)
}
outputFile, err := os.OpenFile("/home/user/output.iso", os.O_WRONLY | os.O_TRUNC | os.O_CREATE, 0644)
if err != nil {
log.Fatalf("failed to create file: %s", err)
}
err = writer.WriteTo(outputFile)
if err != nil {
log.Fatalf("failed to write ISO image: %s", err)
}
err = outputFile.Close()
if err != nil {
log.Fatalf("failed to close output file: %s", err)
}
}
Streaming an ISO via HTTP
It is possible to stream a dynamically generated file on request via HTTP in order to include files or customize configuration files:
import (
"http"
"log"
"github.com/KarpelesLab/iso9660"
)
func ServeHTTP(rw http.RequestWriter, req *http.Request) {
writer, err := iso9660.NewWriter()
if err != nil {
log.Fatalf("failed to create writer: %s", err)
}
// set volume name
writer.Primary.VolumeIdentifier = "LIVE IMAGE"
if syslinux, err := iso9660.NewItemFile("/pkg/main/sys-boot.syslinux.core/share/syslinux/isolinux.bin"); err == nil {
writer.AddBootEntry(&iso9660.BootCatalogEntry{BootInfoTable: true}, isolinux, "isolinux/isolinux.bin")
writer.AddLocalFile("/pkg/main/sys-boot.syslinux.core/share/syslinux/linux.c32", "isolinux/linux.c32")
writer.AddLocalFile("/pkg/main/sys-boot.syslinux.core/share/syslinux/ldlinux.c32", "isolinux/ldlinux.c32")
}
writer.AddLocalFile("kernel.img", "isolinux/kernel.img")
writer.AddLocalFile("initrd.img", "isolinux/initrd.img")
writer.AddLocalFile("root.squashfs", "root.img")
writer.AddFile(getSyslinuxConfig(), "isolinux/isolinux.cfg")
rw.Header().Set("Content-Type", "application/x-iso9660-image")
writer.WriteTo(rw)
}
