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69d2699961
As required by RFC 2045 (MIME). The 78 byte lines work in practice, except that SpamAssassin has rules that give messages with 78-byte lines spam points. Mentioned by kjetilho on irc.
22 lines
679 B
Go
22 lines
679 B
Go
package message
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import (
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"strings"
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)
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// NeedsQuotedPrintable returns whether text, with crlf-separated lines, should be
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// encoded with quoted-printable, based on line lengths and any bare carriage
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// return or bare newline. If not, it can be included as 7bit or 8bit encoding in a
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// new message.
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func NeedsQuotedPrintable(text string) bool {
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// ../rfc/2045:1025
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for _, line := range strings.Split(text, "\r\n") {
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// 78 should be fine too, qp itself has a requirement of 76 bytes on a line, but
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// using qp for anything longer than 76 is safer.
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if len(line) > 76 || strings.Contains(line, "\r") || strings.Contains(line, "\n") {
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return true
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}
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}
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return false
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}
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