121 lines
2.1 KiB
Go
121 lines
2.1 KiB
Go
package mailer
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import (
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"errors"
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"fmt"
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"net"
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"net/textproto"
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"github.com/bdlm/log"
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)
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type fakeServer struct {
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s *Service
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l net.Listener
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MSGS chan msg
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}
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type msg struct {
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Header textproto.MIMEHeader
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Body string
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}
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// NewFakeServer - to get mocked Service for mail-service
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func NewFakeServer() (*fakeServer, *Service) {
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s := &Service{
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SMTPHost: "127.0.0.1",
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SMTPPort: 12025,
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SMTPUsername: "user",
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SMTPPassword: "password",
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SMTPSSL: false,
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}
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return newFakeServer(s)
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}
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func newFakeServer(s *Service) (*fakeServer, *Service) {
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fs := &fakeServer{
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s: s,
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MSGS: make(chan msg),
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}
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l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", fs.s.SMTPHost, fs.s.SMTPPort))
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if err != nil {
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log.Panicf("Error listing: %s", err)
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return nil, nil
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}
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fs.l = l
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go fs.run()
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return fs, s
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}
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func (fs *fakeServer) Close() {
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fs.l.Close()
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}
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func (fs *fakeServer) run() {
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for {
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conn, err := fs.l.Accept()
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if err != nil {
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if errors.Is(err, net.ErrClosed) {
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return
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}
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log.Panicf("Error accepting: %s", err)
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}
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go fs.handle(conn)
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}
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}
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func (fs *fakeServer) handle(conn net.Conn) {
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defer conn.Close()
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c := textproto.NewConn(conn)
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defer c.Close()
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c.Cmd("220 localhost.fake ESMTP Postfix")
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s, _ := c.ReadLine()
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if len(s) < 6 || s[:4] != "EHLO" {
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c.Cmd("221 Bye")
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return
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}
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c.Cmd("250-Hello %s", s[5:])
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c.Cmd("250-PIPELINIG")
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c.Cmd("250 AUTH PLAIN")
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s, _ = c.ReadLine()
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if s == "AUTH PLAIN AHVzZXIAcGFzc3dvcmQ=" {
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c.Cmd("235 Authentication successful")
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} else {
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c.Cmd("535 Authentication failed")
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c.Cmd("221 Bye")
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return
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}
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for {
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s, _ = c.ReadLine()
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switch s {
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case "QUIT":
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c.Cmd("221 Bye")
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return
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case "DATA":
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c.Cmd("354 End data with <CR><LF>.<CR><LF>")
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head, _ := c.ReadMIMEHeader()
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data := ""
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handleMsgData:
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for {
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s, _ := c.ReadLine()
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switch s {
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case ".":
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break handleMsgData
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default:
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data = fmt.Sprintf("%s%s\n", data, s)
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c.Cmd("250 Ok")
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}
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}
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fs.MSGS <- msg{
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Header: head,
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Body: data,
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}
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default:
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// fmt.Println(s)
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// TODO : MAIL FROM: and RCPT TO:
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c.Cmd("250 Ok")
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}
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}
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}
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