Classic ASP

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.

Classic ASP

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

set jsonToken = Server.CreateObject("Chilkat.JsonObject")
success = jsonToken.LoadFile("qa_data/tokens/_salesforce.json")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Failed to load _salesforce.json") & "</pre>"
    Response.End
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"
'  }

set oauth2 = Server.CreateObject("Chilkat.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 <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( oauth2.LastErrorText) & "</pre>"
    Response.End
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.
success = jsonToken.UpdateString("access_token",oauth2.AccessToken)

'  Save the new JSON access token response to a file.
set sbJson = Server.CreateObject("Chilkat.StringBuilder")
jsonToken.EmitCompact = 0
success = jsonToken.EmitSb(sbJson)
success = sbJson.WriteFile("qa_data/tokens/_salesforce.json","utf-8",0)

Response.Write "<pre>" & Server.HTMLEncode( "OAuth2 authorization granted!") & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "New Access Token = " & oauth2.AccessToken) & "</pre>"

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

%>
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