(Visual FoxPro) POP3 GMail XOAUTH2 Authentication

Demonstrates using OAuth2 authentication with pop.gmail.com.

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loMailman
LOCAL loJsonToken
LOCAL lnSuccess
LOCAL lnNumEmails

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.MailMan')
loMailman = CreateObject('Chilkat.MailMan')

loMailman.MailHost = "pop.gmail.com"
loMailman.MailPort = 995
loMailman.PopSsl = 1

loMailman.PopUsername = "my_account@gmail.com"

* If using OAuth2 authentication, leave the password empty.
loMailman.PopPassword = ""

* Load our previously obtained OAuth2 access token.
* See Getting a GMail POP3 OAuth2 Access Token
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonToken = CreateObject('Chilkat.JsonObject')
lnSuccess = loJsonToken.LoadFile("qa_data/tokens/gmail_pop3.json")
IF (lnSuccess = 0) THEN
    ? loJsonToken.LastErrorText
    RELEASE loMailman
    RELEASE loJsonToken
    CANCEL
ENDIF

loMailman.OAuth2AccessToken = loJsonToken.StringOf("access_token")

* Make the TLS connection to the POP3 server.
lnSuccess = loMailman.Pop3Connect()
IF (lnSuccess <> 1) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    RELEASE loJsonToken
    CANCEL
ENDIF

* Authenticate..
lnSuccess = loMailman.Pop3Authenticate()
IF (lnSuccess <> 1) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    RELEASE loJsonToken
    CANCEL
ENDIF

* Find out how many emails are on the server..
lnNumEmails = loMailman.CheckMail()
IF (lnNumEmails < 0) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    RELEASE loJsonToken
    CANCEL
ENDIF

* Examine the POP3 session log:
? loMailman.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.
lnSuccess = loMailman.Pop3EndSession()
IF (lnSuccess <> 1) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    RELEASE loJsonToken
    CANCEL
ENDIF

? "-- Finished."

RELEASE loMailman
RELEASE loJsonToken