B4X

Salesforce OAuth2 Refresh Access Token

See more OAuth2 Examples

Demonstrates how to refresh a Salesforce Access Token.

Note: Use Chilkat v10.1.2 or later for this example.

B4X

Dim success As Boolean = 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.
'  This example loads the JSON access token file 
'  saved by this example: Get SalesForce OAuth2 Access Token via Authorization Flow

Dim jsonToken As ChilkatJsonObject
jsonToken.Initialize
success = jsonToken.LoadFile("qa_data/tokens/_salesforce.json")
If success <> True Then
    Log("Failed to load _salesforce.json")
    Return
End If


'  This is an example of a Salesforce OAuth2 access token to be refreshed:

'  {
'    "access_token": "00D41000....uLZBpT6",
'    "refresh_token": "5Aep....25xdGgkrV",
'    "signature": "cjTbSc5DvcKpaMoRTzuQTJLb1tcMw8LEO01flq4aMD4=",
'    "scope": "refresh_token id",
'    "instance_url": "https://d41000000f8a0eak-dev-ed.my.salesforce.com",
'    "id": "https://login.salesforce.com/id/00D41000000F8A0EAK/005410000....xAAE",
'    "token_type": "Bearer",
'    "issued_at": "1738348388166"
'  }

Dim oauth2 As ChilkatOAuth2
oauth2.Initialize("oauth2")

oauth2.TokenEndpoint = "https://login.salesforce.com/services/oauth2/token"

'  Replace this with your actual client ID (Consumer Key)
oauth2.ClientId = "CLIENT_ID"

'  Note: The client secret is not required because we configured our Connected App
'  to not require it for the refresh flow.  See the screenshot below.

'  Get the "refresh_token"
oauth2.RefreshToken = jsonToken.StringOf("refresh_token")

'  Send the HTTP POST to refresh the access token..
success = oauth2.RefreshAccessToken
If success <> True Then
    Log(oauth2.LastErrorText)
    Return
End If


'  The response contains a new access token, but we must keep
'  our existing refresh token for when we need to refresh again in the future.
jsonToken.UpdateString("access_token", oauth2.AccessToken)

'  Save the new JSON access token response to a file.
Dim sbJson As ChilkatStringBuilder
sbJson.Initialize
jsonToken.EmitCompact = False
jsonToken.EmitSb(sbJson)
sbJson.WriteFile("qa_data/tokens/_salesforce.json", "utf-8", False)

Log("OAuth2 authorization granted!")
Log("New Access Token = " & oauth2.AccessToken)

'  --------------------------------------------------------------------------
'  Here's a screenshot of a Salesforce Connected App 
'  which does not requires the secret for the authorization or refresh flow.
'