mirror of
https://blitiri.com.ar/repos/chasquid
synced 2025-12-18 14:47:03 +00:00
112e492c3a
We should ignore the domains' case, and treat them uniformly, specially when it comes to local domains. This patch extends the existing normalization (IDNA, keeping domains as UTF8 internally) to include case conversion and NFC form for consistency.
51 lines
992 B
Go
51 lines
992 B
Go
// Package envelope implements functions related to handling email envelopes
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// (basically tuples of (from, to, data).
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package envelope
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import (
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"fmt"
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"strings"
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"blitiri.com.ar/go/chasquid/internal/set"
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)
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// Split an user@domain address into user and domain.
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func Split(addr string) (string, string) {
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ps := strings.SplitN(addr, "@", 2)
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if len(ps) != 2 {
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return addr, ""
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}
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return ps[0], ps[1]
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}
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func UserOf(addr string) string {
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user, _ := Split(addr)
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return user
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}
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func DomainOf(addr string) string {
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_, domain := Split(addr)
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return domain
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}
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func DomainIn(addr string, locals *set.String) bool {
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domain := DomainOf(addr)
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if domain == "" {
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return true
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}
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return locals.Has(domain)
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}
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func AddHeader(data []byte, k, v string) []byte {
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// If the value contains newlines, indent them properly.
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if v[len(v)-1] == '\n' {
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v = v[:len(v)-1]
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}
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v = strings.Replace(v, "\n", "\n\t", -1)
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header := []byte(fmt.Sprintf("%s: %s\n", k, v))
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return append(header, data...)
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}
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