Swift

POP3 GMail XOAUTH2 Authentication

See more GMail SMTP/IMAP/POP Examples

Demonstrates using OAuth2 authentication with pop.gmail.com.

Note: This example requires Chilkat v9.5.0.83 or greater.

Swift

func chilkatTest() {
    var success: Bool = false

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let mailman = CkoMailMan()!

    mailman.mailHost = "pop.gmail.com"
    mailman.mailPort = 995
    mailman.popSsl = true

    mailman.popUsername = "my_account@gmail.com"

    // If using OAuth2 authentication, leave the password empty.
    mailman.popPassword = ""

    // Load our previously obtained OAuth2 access token.
    // See Getting a GMail POP3 OAuth2 Access Token
    let jsonToken = CkoJsonObject()!
    success = jsonToken.loadFile(path: "qa_data/tokens/gmail_pop3.json")
    if success == false {
        print("\(jsonToken.lastErrorText!)")
        return
    }

    mailman.oAuth2AccessToken = jsonToken.string(of: "access_token")

    // Make the TLS connection to the POP3 server.
    success = mailman.pop3Connect()
    if success != true {
        print("\(mailman.lastErrorText!)")
        return
    }

    // Authenticate..
    success = mailman.pop3Authenticate()
    if success != true {
        print("\(mailman.lastErrorText!)")
        return
    }

    // Find out how many emails are on the server..
    var numEmails: Int = mailman.checkMail().intValue
    if numEmails < 0 {
        print("\(mailman.lastErrorText!)")
        return
    }

    // Examine the POP3 session log:
    print("\(mailman.pop3SessionLog!)")

    // The POP3 session log will look something like this:

    // **** Connected to pop.gmail.com:995
    // < +OK Gpop ready for requests from 87.9.200.42 l16mb86351205iok
    // > AUTH XOAUTH2 dXNlcj1....VaMDJFAQE=
    // < +OK Welcome.
    // > STAT
    // < +OK 301 1627357
    // 
    // -- Finished.

    // End the POP3 session and close the connection to the GMail server.
    success = mailman.pop3EndSession()
    if success != true {
        print("\(mailman.lastErrorText!)")
        return
    }

    print("-- Finished.")

}