PowerBuilder

GMail IMAP Authentication using OAuth2 Access Token

See more GMail SMTP/IMAP/POP Examples

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

integer li_rc
integer li_Success
oleobject loo_Json
string ls_AccessToken
oleobject loo_Imap

li_Success = 0

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

// See Get GMail IMAP OAuth2 Access Token for Desktop App 
// for sample code showing how to obtain a GMail IMAP read/write access token.

// In this example, our access token was previously saved to the following file which contains JSON like this:
// 	{
// 	 "access_token": "ya39.Ci-XA_C5bGgRDC3UaD-h0_NeL-DVIQnI2gHtBBBHkZzrwlARkwX6R3O0PCDEzRlfaQ",
// 	 "token_type": "Bearer",
// 	 "expires_in": 3600,
// 	 "refresh_token": "1/r_2c_7jddspcdfesrrfKqfXtqo08D6Q-gUU0DsdfVMsx0c"
// 	}
// 
loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")
if li_rc < 0 then
    destroy loo_Json
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_Json.LoadFile("qa_data/tokens/_gmailFullAccess.json")
if li_Success <> 1 then
    Write-Debug "Failed to load GMail access token file."
    destroy loo_Json
    return
end if

ls_AccessToken = loo_Json.StringOf("access_token")

// Do OAuth2 authentication by using the access token as the password in the Login method below...
loo_Imap = create oleobject
li_rc = loo_Imap.ConnectToNewObject("Chilkat.Imap")

loo_Imap.Ssl = 1
loo_Imap.Port = 993

// Connect to the GMail IMAP server.
li_Success = loo_Imap.Connect("imap.gmail.com")
if li_Success <> 1 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Json
    destroy loo_Imap
    return
end if

// Indicate that XOAUTH2 authentication is to be used:
loo_Imap.AuthMethod = "XOAUTH2"

// Login
// Use the email address of the GMail account that granted authorization.
li_Success = loo_Imap.Login("user@gmail.com",ls_AccessToken)
if li_Success <> 1 then
    Write-Debug loo_Imap.LastErrorText
else
    Write-Debug "Successfully authenticated with GMail IMAP using XOAUTH2!"
end if



destroy loo_Json
destroy loo_Imap