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34 lines
897 B
Go
34 lines
897 B
Go
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package txtutil
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import (
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"github.com/StackExchange/dnscontrol/v3/models"
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)
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// SplitSingleLongTxt finds TXT records with a single long string and splits it
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// into 255-octet chunks. This is used by providers that, when a user specifies
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// one long TXT string, split it into smaller strings behind the scenes.
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// Typically this replaces the TXTMulti capability.
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func SplitSingleLongTxt(records []*models.RecordConfig) {
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for _, rc := range records {
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if rc.HasFormatIdenticalToTXT() {
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s := rc.TxtStrings[0]
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if len(rc.TxtStrings) == 1 && len(s) > 255 {
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rc.SetTargetTXTs(splitChunks(s, 255))
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}
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}
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}
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}
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func splitChunks(buf string, lim int) []string {
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var chunk string
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chunks := make([]string, 0, len(buf)/lim+1)
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for len(buf) >= lim {
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chunk, buf = buf[:lim], buf[lim:]
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chunks = append(chunks, chunk)
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}
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if len(buf) > 0 {
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chunks = append(chunks, buf[:])
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}
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return chunks
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}
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