I used to be able to connect to port 143
of a mail server like this:
c, err := imap.Dial(mailServer)
The code above connects to port 143 of the mailServer
. Now I have a new mail server only accepts port 993
. Looking at the Golang imap
source code, the function DialTLS
will connect to port 993
. The signature of DialTLS
looks like this:
func DialTLS(addr string, config *tls.Config) (c *Client, err error)
Now I don't know how to construct the *tls.Config
. I Googled around, but didn't not find anything really useful. Can someone show me some example how to construct the *tls.Config
?
I tried to pass in nil
as the second parameter, it compiles, and I didn't get any runtime error. But it seems no new mails were fetched, even I believe there should be.
My fetch mail code looks like this:
// testimap
package main
import (
"bytes"
"code.google.com/p/go-imap/go1/imap"
"fmt"
"net/mail"
"time"
)
type Mail struct {
Subject string
Body string
From string
Uid uint32
}
func FetchMail(lastUid uint32) []*Mail {
defer func() {
if err := recover(); err != nil {
fmt.Println(err)
}
}()
//
// Note: most of error handling code is omitted for brevity
//
var (
c *imap.Client
cmd *imap.Command
rsp *imap.Response
)
// Connect to the server
c, err := imap.DialTLS(mailServer, nil)
if err != nil {
fmt.Println(err)
}
// Remember to log out and close the connection when finished
defer c.Logout(30 * time.Second)
// Print server greeting (first response in the unilateral server data queue)
//fmt.Println("Server says hello:", c.Data[0].Info)
c.Data = nil
// Enable encryption, if supported by the server
if c.Caps["STARTTLS"] {
c.StartTLS(nil)
}
// Authenticate
if c.State() == imap.Login {
c.Login(mailSupportUser, mailSupportPw)
}
//// List all top-level mailboxes, wait for the command to finish
cmd, err = imap.Wait(c.List("", "%"))
if err != nil {
fmt.Println(err)
}
// Print mailbox information
//fmt.Println("
Top-level mailboxes:")
//for _, rsp = range cmd.Data {
// fmt.Println("|--", rsp.MailboxInfo())
//}
// Check for new unilateral server data responses
//for _, rsp = range c.Data {
// fmt.Println("Server data:", rsp)
//}
c.Data = nil
// Open a mailbox (synchronous command - no need for imap.Wait)
c.Select("INBOX", true)
//fmt.Print("
Mailbox status:
", c.Mailbox)
// Fetch the headers of the 10 most recent messages
set, err := imap.NewSeqSet(fmt.Sprint(lastUid, ":*"))
if err != nil {
fmt.Println(err)
}
//if c.Mailbox.Messages >= 10 {
// set.AddRange(c.Mailbox.Messages-9, c.Mailbox.Messages)
//} else {
// set.Add("1:*")
//}
cmd, err = c.UIDFetch(set, "RFC822.HEADER", "RFC822.TEXT")
if err != nil {
fmt.Println(err)
}
// Process responses while the command is running
//fmt.Println("
Most recent messages:")
mails := make([]*Mail, 0, 10)
for cmd.InProgress() {
// Wait for the next response (no timeout)
c.Recv(-1)
// Process command data
for _, rsp = range cmd.Data {
if err != nil {
fmt.Println(err)
}
header := imap.AsBytes(rsp.MessageInfo().Attrs["RFC822.HEADER"])
uid := imap.AsNumber((rsp.MessageInfo().Attrs["UID"]))
body := imap.AsBytes(rsp.MessageInfo().Attrs["RFC822.TEXT"])
if msg, err := mail.ReadMessage(bytes.NewReader(header)); msg != nil {
if err != nil {
fmt.Println(err)
}
mail := &Mail{
Subject: msg.Header.Get("Subject"),
From: msg.Header.Get("FROM"),
Body: string(body),
Uid: uid,
}
if mail.Uid < lastUid {
continue
}
mails = append(mails, mail)
}
}
cmd.Data = nil
c.Data = nil
}
// Check command completion status
if rsp, err := cmd.Result(imap.OK); err != nil {
if err == imap.ErrAborted {
fmt.Println("Fetch command aborted")
} else {
fmt.Println("Fetch error:", rsp.Info)
}
}
fmt.Println(mails)
return mails
}