recv & send

server.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"fmt"
+
+	guerrilla "github.com/flashmob/go-guerrilla"
+	"github.com/flashmob/go-guerrilla/backends"
+	"github.com/flashmob/go-guerrilla/log"
+	"github.com/flashmob/go-guerrilla/mail"
+)
+
+// Start starts the server.
+func Start(appConfig *mailRelayConfig) (err error) {
+
+	cfg := &guerrilla.AppConfig{LogFile: log.OutputStdout.String(), AllowedHosts: []string{"warpmail.net"}}
+	sc := guerrilla.ServerConfig{
+		ListenInterface: "0.0.0.0:2525",
+		IsEnabled:       true,
+	}
+	cfg.Servers = append(cfg.Servers, sc)
+
+	bcfg := backends.BackendConfig{
+		"save_workers_size":  3,
+		"save_process":       "HeadersParser|Header|Hasher|Debugger|MailRelay",
+		"log_received_mails": true,
+		"primary_mail_host":  "homeoffice.com",
+		"username":           appConfig.Username,
+		"password":           appConfig.Password,
+		"server":             appConfig.Server,
+		"port":               appConfig.Port,
+	}
+	cfg.BackendConfig = bcfg
+
+	d := guerrilla.Daemon{Config: cfg}
+	d.AddProcessor("MailRelay", mailRelayProcessor)
+
+	return d.Start()
+}
+
+// mailRelayProcessor decorator relays emails to another SMTP server.
+var mailRelayProcessor = func() backends.Decorator {
+	config := &mailRelayConfig{}
+	initFunc := backends.InitializeWith(func(backendConfig backends.BackendConfig) error {
+		configType := backends.BaseConfig(&mailRelayConfig{})
+		bcfg, err := backends.Svc.ExtractConfig(backendConfig, configType)
+		if err != nil {
+			return err
+		}
+		config = bcfg.(*mailRelayConfig)
+		return nil
+	})
+	backends.Svc.AddInitializer(initFunc)
+
+	return func(p backends.Processor) backends.Processor {
+		return backends.ProcessWith(
+			func(e *mail.Envelope, task backends.SelectTask) (backends.Result, error) {
+				if task == backends.TaskSaveMail {
+
+					err := sendMail(e, config)
+					if err != nil {
+						fmt.Printf("!!! %v\n", err)
+						return backends.NewResult(fmt.Sprintf("554 Error: %s", err)), err
+					}
+
+					return p.Process(e, task)
+				}
+				return p.Process(e, task)
+			},
+		)
+	}
+}