Visual FoxPro

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?

Visual FoxPro

LOCAL lnSuccess
LOCAL loJsonToken
LOCAL loOauth2
LOCAL loSbJson

lnSuccess = 0

*  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.

loJsonToken = CreateObject('Chilkat.JsonObject')
lnSuccess = loJsonToken.LoadFile("qa_data/tokens/hotmail.json")
IF (lnSuccess <> 1) THEN
    ? "Failed to load office365.json"
    RELEASE loJsonToken
    CANCEL
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"
*  }

loOauth2 = CreateObject('Chilkat.OAuth2')

*  See Microsoft OAuth2 Authorization Endpoint
loOauth2.TokenEndpoint = "https://login.microsoftonline.com/common/oauth2/v2.0/token"

*  Replace this with your actual App Registration's Application (client) ID.
loOauth2.ClientId = "CLIENT_ID"

*  Get the "refresh_token"
loOauth2.RefreshToken = loJsonToken.StringOf("refresh_token")

*  Send the HTTP POST to refresh the access token..
lnSuccess = loOauth2.RefreshAccessToken()
IF (lnSuccess <> 1) THEN
    ? loOauth2.LastErrorText
    RELEASE loJsonToken
    RELEASE loOauth2
    CANCEL
ENDIF

? loOauth2.LastErrorText

? "New access token: " + loOauth2.AccessToken
? "New refresh token: " + loOauth2.RefreshToken

*  Update the JSON with the new tokens.
loJsonToken.UpdateString("access_token",loOauth2.AccessToken)
loJsonToken.UpdateString("refresh_token",loOauth2.RefreshToken)

*  Save the new JSON access token response to a file.
loSbJson = CreateObject('Chilkat.StringBuilder')
loJsonToken.EmitCompact = 0
loJsonToken.EmitSb(loSbJson)
loSbJson.WriteFile("qa_data/tokens/hotmail.json","utf-8",0)

? "OAuth2 authorization granted!"
? "New Access Token = " + loOauth2.AccessToken

RELEASE loJsonToken
RELEASE loOauth2
RELEASE loSbJson