2024-01-29 20:21:23 +00:00
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package url
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import (
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"hash/fnv"
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"strings"
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)
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2024-01-29 20:39:27 +00:00
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// GenerateHash hash the `url` param into a base62 string using fnv algorithm.
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2024-01-29 20:21:23 +00:00
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func GenerateHash(url string) (string, error) {
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hasher := fnv.New32a()
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_, err := hasher.Write([]byte(url))
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if err != nil {
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return "", err
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}
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return encodeToBase62(hasher.Sum32()), nil
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}
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var base62 = [62]rune{
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
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'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
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}
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func encodeToBase62(hash uint32) string {
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var sb strings.Builder
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sb.Grow(8)
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for hash > 0 {
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sb.WriteRune(base62[hash%62])
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hash /= 62
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}
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return sb.String()
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}
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