// NewGMail returns a new GMail object which is authorized to send email.
func NewGMail(clientId, clientSecret, tokenCacheFile string) (*GMail, error) {
config := oauth.Config{
ClientId: clientId,
ClientSecret: clientSecret,
Scope: gmail.GmailComposeScope,
AuthURL: "https://accounts.google.com/o/oauth2/auth",
TokenURL: "https://accounts.google.com/o/oauth2/token",
TokenCache: oauth.CacheFile(tokenCacheFile),
RedirectURL: "urn:ietf:wg:oauth:2.0:oob",
AccessType: "offline",
}
client, err := auth.RunFlow(&config)
if err != nil {
return nil, err
}
service, err := gmail.New(client)
if err != nil {
return nil, err
}
return &GMail{
service: service,
}, nil
}
// gmailMain is an example that demonstrates calling the Gmail API.
// It iterates over all messages of a user that are larger
// than 5MB, sorts them by size, and then interactively asks the user to
// choose either to Delete, Skip, or Quit for each message.
//
// Example usage:
// go build -o go-api-demo *.go
// go-api-demo -clientid="my-clientid" -secret="my-secret" gmail
func gmailMain(client *http.Client, argv []string) {
if len(argv) != 0 {
fmt.Fprintln(os.Stderr, "Usage: gmail")
return
}
svc, err := gmail.New(client)
if err != nil {
log.Fatalf("Unable to create Gmail service: %v", err)
}
var total int64
msgs := []message{}
pageToken := ""
for {
req := svc.Users.Messages.List("me").Q("larger:5M")
if pageToken != "" {
req.PageToken(pageToken)
}
r, err := req.Do()
if err != nil {
log.Fatalf("Unable to retrieve messages: %v", err)
}
log.Printf("Processing %v messages...\n", len(r.Messages))
for _, m := range r.Messages {
msg, err := svc.Users.Messages.Get("me", m.Id).Do()
if err != nil {
log.Fatalf("Unable to retrieve message %v: %v", m.Id, err)
}
total += msg.SizeEstimate
date := ""
for _, h := range msg.Payload.Headers {
if h.Name == "Date" {
date = h.Value
break
}
}
msgs = append(msgs, message{
size: msg.SizeEstimate,
gmailID: msg.Id,
date: date,
snippet: msg.Snippet,
})
}
if r.NextPageToken == "" {
break
}
pageToken = r.NextPageToken
}
log.Printf("total: %v\n", total)
sortBySize(msgs)
reader := bufio.NewReader(os.Stdin)
count, deleted := 0, 0
for _, m := range msgs {
count++
fmt.Printf("\nMessage URL: https://mail.google.com/mail/u/0/#all/%v\n", m.gmailID)
fmt.Printf("Size: %v, Date: %v, Snippet: %q\n", m.size, m.date, m.snippet)
fmt.Printf("Options: (d)elete, (s)kip, (q)uit: [s] ")
val := ""
if val, err = reader.ReadString('\n'); err != nil {
log.Fatalf("unable to scan input: %v", err)
}
val = strings.TrimSpace(val)
switch val {
case "d": // delete message
if err := svc.Users.Messages.Delete("me", m.gmailID).Do(); err != nil {
log.Fatalf("unable to delete message %v: %v", m.gmailID, err)
}
log.Printf("Deleted message %v.\n", m.gmailID)
deleted++
case "q": // quit
log.Printf("Done. %v messages processed, %v deleted\n", count, deleted)
os.Exit(0)
default:
}
}
}