Maybe This is a simple NBT parser.
You can get the package with go get command.
go get -u github.com/beito123/nbt-u is a option updating the package
This is licensed by MIT License. See LICENSE file.
func main() {
// Data: Unnamed(compound){ world_name(string): jagajaga, hardcore(byte): 18 }
// Raw data
// 0x0000: 0a 00 00 01 00 08 68 61 72 64 63 6f | ......hardco
// 0x000c: 72 65 12 08 00 0a 77 6f 72 6c 64 5f | re....world_
// 0x0018: 6e 61 6d 65 00 08 6a 61 67 61 6a 61 | name..jagaja
// 0x0024: 67 61 00 | ga.
// Compressed bytes // level.dat and more are saved as compressed with gzip
data := []byte{0x1F, 0x8B, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0xE3, 0x62, 0x60, 0x60, 0x64, 0xE0, 0xC8, 0x48, 0x2C, 0x4A,
0x49, 0xCE, 0x2F, 0x4A, 0x15, 0xE2, 0x60, 0xE0, 0x2A, 0xCF, 0x2F,
0xCA, 0x49, 0x89, 0xCF, 0x4B, 0xCC, 0x4D, 0x65, 0xE0, 0xC8, 0x4A,
0x4C, 0x4F, 0x04, 0x61, 0x06, 0x00, 0x7A, 0x8D, 0xB4, 0xF9, 0x27, 0x00, 0x00, 0x00}
// Read after uncompressing
// If you want to parse compressed bytes, you should use this
stream, err := nbt.FromReader(bytes.NewBuffer(data), nbt.BigEndian)
if err != nil {
panic(err)
}
// If you read from file
// stream, err := nbt.FromFile("./level.dat", nbt.BigEndian)
// Read a tag from read bytes
tag, err := stream.ReadTag()
if err != nil {
panic(err)
}
// Convert to String // For dump
str, err := tag.ToString()
if err != nil {
panic(err)
}
// read data: { hardcore(Byte): 18, world_name(String): jagajaga }
fmt.Printf("read data: %s", str)
}func main(){
// tag = Unnamed(Compound){ hardcore(Byte): 18, world_name(String): jagajaga }
tag := &nbt.Compound{
Value: map[string]nbt.Tag{
"hardcore": &nbt.Byte{
Value: 18,
},
"world_name": &nbt.String{
Value: "jagajaga",
},
},
}
// New stream with big endian
// Big endian is used for level.dat and world data
// Little endian is used for leveldb
stream := nbt.NewStream(nbt.BigEndian)
// Write a tag
err := stream.WriteTag(tag)
if err != nil {
panic(err)
}
// Output file:
// 0x0000: 0a 00 00 01 00 08 68 61 72 64 63 6f | ......hardco
// 0x000c: 72 65 12 08 00 0a 77 6f 72 6c 64 5f | re....world_
// 0x0018: 6e 61 6d 65 00 08 6a 61 67 61 6a 61 | name..jagaja
// 0x0024: 67 61 00 | ga.
ioutil.WriteFile("./nbt.dat", stream.Bytes(), os.ModePerm)
fmt.Println("generated ./nbt.dat")
// If you want to compress for level.dat etc...
data, err := nbt.Compress(stream, nbt.CompressGZip, nbt.DefaultCompressionLevel)
if err != nil {
panic(err)
}
ioutil.WriteFile("./nbt_compressed.dat", data, os.ModePerm)
fmt.Println("generated ./nbt_compressed.dat")
}