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https://blitiri.com.ar/repos/chasquid
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77d547288f
This patch introduces the couriers, which the queue uses to deliver mail. We have a local courier (using procmail), a remote courier (uses SMTP), and a router courier that decides which of the two to use based on a list of local domains. There are still a few things pending, but they all have their basic functionality working and tested.
49 lines
1.0 KiB
Go
49 lines
1.0 KiB
Go
// Package courier implements various couriers for delivering messages.
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package courier
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import "strings"
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// Courier delivers mail to a single recipient.
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// It is implemented by different couriers, for both local and remote
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// recipients.
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type Courier interface {
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Deliver(from string, to string, data []byte) error
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}
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// Router decides if the destination is local or remote, and delivers
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// accordingly.
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type Router struct {
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Local Courier
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Remote Courier
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LocalDomains map[string]bool
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}
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func (r *Router) Deliver(from string, to string, data []byte) error {
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d := domainOf(to)
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if r.LocalDomains[d] {
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return r.Local.Deliver(from, to, data)
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} else {
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return r.Remote.Deliver(from, to, data)
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}
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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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