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gitea/modules/setting/incoming_email.go
KN4CK3R fc037b4b82
Add support for incoming emails (#22056)
closes #13585
fixes #9067
fixes #2386
ref #6226
ref #6219
fixes #745

This PR adds support to process incoming emails to perform actions.
Currently I added handling of replies and unsubscribing from
issues/pulls. In contrast to #13585 the IMAP IDLE command is used
instead of polling which results (in my opinion 😉) in cleaner code.

Procedure:
- When sending an issue/pull reply email, a token is generated which is
present in the Reply-To and References header.
- IMAP IDLE waits until a new email arrives
- The token tells which action should be performed

A possible signature and/or reply gets stripped from the content.

I added a new service to the drone pipeline to test the receiving of
incoming mails. If we keep this in, we may test our outgoing emails too
in future.

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
2023-01-14 23:57:10 +08:00

74 lines
1.9 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package setting
import (
"fmt"
"net/mail"
"strings"
"code.gitea.io/gitea/modules/log"
)
var IncomingEmail = struct {
Enabled bool
ReplyToAddress string
TokenPlaceholder string `ini:"-"`
Host string
Port int
UseTLS bool `ini:"USE_TLS"`
SkipTLSVerify bool `ini:"SKIP_TLS_VERIFY"`
Username string
Password string
Mailbox string
DeleteHandledMessage bool
MaximumMessageSize uint32
}{
Mailbox: "INBOX",
DeleteHandledMessage: true,
TokenPlaceholder: "%{token}",
MaximumMessageSize: 10485760,
}
func newIncomingEmail() {
if err := Cfg.Section("email.incoming").MapTo(&IncomingEmail); err != nil {
log.Fatal("Unable to map [email.incoming] section on to IncomingEmail. Error: %v", err)
}
if !IncomingEmail.Enabled {
return
}
if err := checkReplyToAddress(IncomingEmail.ReplyToAddress); err != nil {
log.Fatal("Invalid incoming_mail.REPLY_TO_ADDRESS (%s): %v", IncomingEmail.ReplyToAddress, err)
}
}
func checkReplyToAddress(address string) error {
parsed, err := mail.ParseAddress(IncomingEmail.ReplyToAddress)
if err != nil {
return err
}
if parsed.Name != "" {
return fmt.Errorf("name must not be set")
}
c := strings.Count(IncomingEmail.ReplyToAddress, IncomingEmail.TokenPlaceholder)
switch c {
case 0:
return fmt.Errorf("%s must appear in the user part of the address (before the @)", IncomingEmail.TokenPlaceholder)
case 1:
default:
return fmt.Errorf("%s must appear only once", IncomingEmail.TokenPlaceholder)
}
parts := strings.Split(IncomingEmail.ReplyToAddress, "@")
if !strings.Contains(parts[0], IncomingEmail.TokenPlaceholder) {
return fmt.Errorf("%s must appear in the user part of the address (before the @)", IncomingEmail.TokenPlaceholder)
}
return nil
}