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20 lines
401 B
20 lines
401 B
package terse
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import (
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"bytes"
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"hash/crc32"
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)
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const ALPHABET string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._~"
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const BASE uint32 = uint32(len(ALPHABET))
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func GetShortCode(url []byte) string {
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var code bytes.Buffer
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num := crc32.ChecksumIEEE(url)
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for num > 0 {
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next := (num % BASE)
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code.WriteRune(rune(ALPHABET[next]))
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num = num / 62
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}
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return code.String()
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}
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