Visual FoxPro

Salesforce OAuth2 Access Token

See more OAuth2 Examples

Demonstrates how to get a Salesforce OAuth2 access token from a desktop application or script. Visual FoxPro

LOCAL lnSuccess
LOCAL loOauth2
LOCAL lcUrl
LOCAL lnNumMsWaited
LOCAL loSbJson

lnSuccess = 0

* To further clarify, see OAuth 2.0 Authorization Flow

loOauth2 = CreateObject('Chilkat.OAuth2')

* This should be the port in the localhost callback URL for your connected app.  
* The callback URL would look like "http://localhost:3017/" if the port number is 3017.
loOauth2.ListenPort = 3017

loOauth2.AuthorizationEndpoint = "https://login.salesforce.com/services/oauth2/authorize"
loOauth2.TokenEndpoint = "https://login.salesforce.com/services/oauth2/token"

* Replace this with your actual client ID (Consumer Key)
loOauth2.ClientId = "CLIENT_ID"

* We don't have to include the client secret.
* See the screenshot of our Connected App below..

* This is for Require Proof Key for Code Exchange (PKCE)
* See OAuth2 PKCE Explained
loOauth2.CodeChallenge = 1
loOauth2.CodeChallengeMethod = "S256"

* To force the OAuth consent screen to reappear (even if previously granted), use:
loOauth2.AddAuthQueryParam("prompt","consent")

* Begin the OAuth2 authorization flow.  This returns a URL that should be loaded in a browser.
lcUrl = loOauth2.StartAuth()
IF (loOauth2.LastMethodSuccess <> 1) THEN
    ? loOauth2.LastErrorText
    RELEASE loOauth2
    CANCEL
ENDIF

* Launch the default browser on the system and navigate to the url.
* The LaunchBrowser method was added in Chilkat v10.1.2.
lnSuccess = loOauth2.LaunchBrowser(lcUrl)
IF (lnSuccess = 0) THEN
    ? loOauth2.LastErrorText
    RELEASE loOauth2
    CANCEL
ENDIF

* Wait for the user to approve or deny authorization in the browser.
lnNumMsWaited = 0
DO WHILE (lnNumMsWaited < 90000) AND (loOauth2.AuthFlowState < 3)
    loOauth2.SleepMs(100)
    lnNumMsWaited = lnNumMsWaited + 100
ENDDO

* If the browser does not respond within the specified time, AuthFlowState will be:
* 
* 1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
* 2: Waiting for Final Response – The thread is awaiting the final access token response.
* In either case, cancel the background task initiated by StartAuth.

IF (loOauth2.AuthFlowState < 3) THEN
    loOauth2.Cancel()
    ? "No response from the browser!"
    RELEASE loOauth2
    CANCEL
ENDIF

* Check AuthFlowState to determine if authorization was granted, denied, or failed:
* 
* 3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
* 4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
* 5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

IF (loOauth2.AuthFlowState = 5) THEN
    ? "OAuth2 failed to complete."
    ? loOauth2.FailureInfo
    RELEASE loOauth2
    CANCEL
ENDIF

IF (loOauth2.AuthFlowState = 4) THEN
    ? "OAuth2 authorization was denied."
    ? loOauth2.AccessTokenResponse
    RELEASE loOauth2
    CANCEL
ENDIF

IF (loOauth2.AuthFlowState <> 3) THEN
    ? "Unexpected AuthFlowState:" + STR(loOauth2.AuthFlowState)
    RELEASE loOauth2
    CANCEL
ENDIF

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

* Save the full JSON access token response to a file.
loSbJson = CreateObject('Chilkat.StringBuilder')
loSbJson.Append(loOauth2.AccessTokenResponse)
loSbJson.WriteFile("qa_data/tokens/_salesforce.json","utf-8",0)

* The saved JSON response looks like this:

* {
*   "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"
* }

* --------------------------------------------------------------------------
* Here's a screenshot of a Salesforce Connected App 
* with the correct Callback URL for this example,
* and also selects "Require Proof Key for Code Exchange (PKCE)"
* and does not requires the secret for the authorization or refresh flow,
* and also allows for the Client Credentials flow.
* 

RELEASE loOauth2
RELEASE loSbJson