Core functionality for new aiterp.net servers
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package generate
import ( "crypto/rand" "encoding/binary" "encoding/hex" "strings" "time" )
// ID generates a 24 character hex string from 8 bytes of current time
// in ns and 4 bytes of crypto-random. In practical terms, that makes
// them orderable.
func ID() string { bytes := make([]byte, 12) binary.BigEndian.PutUint64(bytes, uint64(time.Now().UnixNano())) rand.Read(bytes[8:])
return strings.ToLower(hex.EncodeToString(bytes)) }
// FriendlyID generates a human-friendly ID that has a higher uniqueness,
// and a limited alphabet designed for human readability and manual copying.
//
// There are 7.98e+22 IDs in a 16-length ID, which means that if there are
// 10,000 items, you're as likely to guess one as winning the grand prize
// of the biggest lotteries around the world billions of times in a row.
func FriendlyID(length int) string { const alphabet = "0123456789abcdfghjkmpqrtvxy" const alphabetLength = byte(len(alphabet))
// Generate random bytes
results := make([]byte, length) rand.Read(results)
// Truncate it within the alphabet
for i := 0; i < 16; i++ { results[i] = alphabet[results[i]%alphabetLength] }
return string(results) }
// SessionID generates a 48 character hex string with crypto/rand
func SessionID() string { bytes := make([]byte, 24) rand.Read(bytes)
return strings.ToLower(hex.EncodeToString(bytes)) }
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