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Hotmail Refresh Access Token (also for Live.com, Outlook.com)

See more OAuth2 Examples

An OAuth2 access token is typically valid for 1 hour. Interaction with the Hotmail account owner via a browser is only needed for getting the initial access token. Once you have it, it can be continually refreshed without user interaction for a long time.

See: How Long can an OAuth2 Access Token be Refreshed?

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Local $bSuccess = False

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

; It is assumed we previously obtained an OAuth2 access token.

; Note: Refreshing an access token does not require user-interaction.  
; Only the act of getting the initial access token requires interactive authorization from the Hotmail account owner 
; (i.e. a browser is displayed and the Hotmail account owner authorizes access by the app).

; Once you have the initial access token, it can be refreshed for a long time.
; A typical strategy is to write your application to automatically refresh the access token 
; when authentication fails, and then retry the operation with the new access token.

$oJsonToken = ObjCreate("Chilkat.JsonObject")
$bSuccess = $oJsonToken.LoadFile("qa_data/tokens/hotmail.json")
If ($bSuccess <> True) Then
    ConsoleWrite("Failed to load office365.json" & @CRLF)
    Exit
EndIf

; The access token JSON looks like this:

; {
;   "token_type": "Bearer",
;   "scope": "https://outlook.office.com/SMTP.Send https://outlook.office.com/IMAP.AccessAsUser.All https://outlook.office.com/POP.AccessAsUser.All",
;   "expires_in": 3600,
;   "ext_expires_in": 3600,
;   "access_token": "EwBoA+ ... 7pOYcWr5pFwQgI=",
;   "refresh_token": "M.C546_BL2.0.U.-CkW ... g5CKSlDBQ$$",
;   "id_token": "eyJ0e ... 2iiu5iqBK9n7s3A"
; }

$oOauth2 = ObjCreate("Chilkat.OAuth2")

; See Microsoft OAuth2 Authorization Endpoint
$oOauth2.TokenEndpoint = "https://login.microsoftonline.com/common/oauth2/v2.0/token"

; Replace this with your actual App Registration's Application (client) ID.
$oOauth2.ClientId = "CLIENT_ID"

; Get the "refresh_token"
$oOauth2.RefreshToken = $oJsonToken.StringOf("refresh_token")

; Send the HTTP POST to refresh the access token..
$bSuccess = $oOauth2.RefreshAccessToken()
If ($bSuccess <> True) Then
    ConsoleWrite($oOauth2.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite($oOauth2.LastErrorText & @CRLF)

ConsoleWrite("New access token: " & $oOauth2.AccessToken & @CRLF)
ConsoleWrite("New refresh token: " & $oOauth2.RefreshToken & @CRLF)

; Update the JSON with the new tokens.
$oJsonToken.UpdateString("access_token",$oOauth2.AccessToken)
$oJsonToken.UpdateString("refresh_token",$oOauth2.RefreshToken)

; Save the new JSON access token response to a file.
$oSbJson = ObjCreate("Chilkat.StringBuilder")
$oJsonToken.EmitCompact = False
$oJsonToken.EmitSb($oSbJson)
$oSbJson.WriteFile("qa_data/tokens/hotmail.json","utf-8",False)

ConsoleWrite("OAuth2 authorization granted!" & @CRLF)
ConsoleWrite("New Access Token = " & $oOauth2.AccessToken & @CRLF)