(Swift) IMAP using SOCKS5, SOCKS4 Proxy

Demonstrates how to connect to an IMAP server through a SOCKS5 or SOCKS4 proxy.

Note: This example requires Chilkat v11.0.0 or greater.

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func chilkatTest() {
    var success: Bool = false

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

    let imap = CkoImap()!

    // To use a SOCKS4 or SOCKS5 proxy, simply set the following
    // properties prior to connecting with the IMAP server:
    // The SOCKS hostname may be a domain name or 
    // IP address:
    imap.socksHostname = "www.mysocksproxyserver.com"
    imap.socksPort = 1080
    imap.socksUsername = "myProxyLogin"
    imap.socksPassword = "myProxyPassword"
    // Set the SOCKS version to 4 or 5 based on the version
    // of the SOCKS proxy server:
    imap.socksVersion = 5
    // Note: SOCKS4 servers only support usernames without passwords.
    // SOCKS5 servers support full login/password authentication.

    // Connect to an IMAP server through the SOCKS proxy.
    // Use TLS
    imap.ssl = true
    imap.port = 993
    success = imap.connect("imap.someMailServer.com")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // Login
    success = imap.login("myLogin", password: "myPassword")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // Select an IMAP mailbox
    success = imap.selectMailbox("Inbox")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // Get the message IDs of all the emails in the mailbox
    // We can choose to fetch UIDs or sequence numbers.
    var fetchUids: Bool = true
    let messageSet = CkoMessageSet()!
    success = imap.queryMbx("ALL", bUid: fetchUids, msgSet: messageSet)
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // Fetch the emails into a bundle object:
    let bundle = CkoEmailBundle()!
    var headersOnly: Bool = false
    success = imap.fetchMsgSet(headersOnly, msgSet: messageSet, bundle: bundle)
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // Loop over the bundle and display the FROM and SUBJECT of each.
    let email = CkoEmail()!
    var i: Int = 0
    var numEmails: Int = bundle.messageCount.intValue
    while i < numEmails {

        bundle.email(at: i, email: email)

        print("\(email.from!)")
        print("\(email.subject!)")
        print("--")
        i = i + 1
    }

    // Disconnect from the IMAP server.
    success = imap.disconnect()

}