(Visual FoxPro) Yahoo IMAP Authentication using OAuth2 Access Token

See more Yahoo Mail Examples

Demonstrates how to do IMAP OAuth2 authentication for Yahoo (or any other IMAP mail server supporting OAuth2 authentication). This example assumes an OAuth2 access token was previously obtained.

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

LOCAL loJson
LOCAL lnSuccess
LOCAL lcAccessToken
LOCAL loImap

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

* See Get Yahoo Mail OAuth2 Access Token for Desktop App 
* for sample code showing how to obtain a Yahoo Mail access token.

* In this example, our access token was previously saved to the following file which contains JSON like this:
* {
*   "access_token": "kCVQdnOdul...LHucA--",
*   "refresh_token": "AIenVXETSo0jklFBVkPS8vVm8E.Ej9ToRG.xDbDYmZ65WIs5t6CZhDrD",
*   "expires_in": 3600,
*   "token_type": "bearer",
*   "xoauth_yahoo_guid": "HGDQCVF5JB4YDOWHITQJFBHCWA"
* }

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
lnSuccess = loJson.LoadFile("qa_data/tokens/yahooMail.json")
IF (lnSuccess <> 1) THEN
    ? "Failed to load GMail access token file."
    RELEASE loJson
    CANCEL
ENDIF

lcAccessToken = loJson.StringOf("access_token")

* Do OAuth2 authentication by using the access token as the password in the Login method below...
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Imap')
loImap = CreateObject('Chilkat.Imap')

loImap.Ssl = 1
loImap.Port = 993

* Connect to the Yahoo IMAP server.
lnSuccess = loImap.Connect("imap.mail.yahoo.com")
IF (lnSuccess <> 1) THEN
    ? loImap.LastErrorText
    RELEASE loJson
    RELEASE loImap
    CANCEL
ENDIF

* Indicate that XOAUTH2 authentication is to be used:
loImap.AuthMethod = "XOAUTH2"

* Login
* Use the email address of the GMail account that granted authorization.
lnSuccess = loImap.Login("user@yahoo.com",lcAccessToken)
IF (lnSuccess <> 1) THEN
    ? loImap.LastErrorText
ELSE
    ? "Successfully authenticated with Yahoo IMAP using XOAUTH2!"
ENDIF

RELEASE loJson
RELEASE loImap