Visual FoxPro Requires Chilkat v10.1.2+

Wish for Merchants -- Get OAuth2 Access Token for Desktop App

See more OAuth2 Examples

Demonstrates how to get a Wish for Merchants 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

*  This example is for desktop applicatons (it is not for code that runs on a web server).

*  This is the way to initially obtain the OAuth2 access token.  Afterwards it can be 
*  repeatedly refreshed without user interaction, as shown in this example: Refresh Wish OAuth2 Access Token.

loOauth2 = CreateObject('Chilkat.OAuth2')

*  Wish OAuth2 does not allow a localhost callback URI such as "http://localhost:<portNumber>/"
*  For a desktop app, you must provide a script on your web server to redirect to "http://localhost/<portNumber>"

*  Your applicaton must use your own public web server as an intermediate
*  to receive and forward the redirect to localhost.
*  See Using Your Web Server as an Intermediary for OAuth2 Redirect to localhost
loOauth2.AppCallbackUrl = "https://yourwebserver.com/OAuth2.php"
loOauth2.ListenPort = 3017

loOauth2.AuthorizationEndpoint = "https://merchant.wish.com/v3/oauth/authorize"
loOauth2.TokenEndpoint = "https://merchant.wish.com/api/v3/oauth/access_token"

loOauth2.UncommonOptions = "EXCHANGE_CODE_FOR_TOKEN_USING_GET"

*  Replace these with actual values.
loOauth2.ClientId = "WISH-CLIENT-ID"
loOauth2.ClientSecret = "WISH-CLIENT-SECRET"

loOauth2.Scope = ""

*  Begin the OAuth2 Authorization code 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

? "url = " + lcUrl

*  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

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

*  The full JSON received looks like this:
*  {
*    "message": "",
*    "code": 0,
*    "data": {
*      "access_token": "15af1c191c1243b029bc1660b5c08ce7",
*      "scopes": [
*        "epc:read",
*        "epc:write",
*        "fbs:read",
*        "fbs:write",
*        "fbw:read",
*        "fbw:write",
*        "infractions:read",
*        "infractions:write",
*        "insurance:read",
*        "insurance:write",
*        "loans:read",
*        "loans:write",
*        "merchant:read",
*        "merchant:write",
*        "notifications:read",
*        "notifications:write",
*        "orders:read",
*        "orders:write",
*        "payments:read",
*        "payments:write",
*        "penalties:read",
*        "penalties:write",
*        "product_boost:read",
*        "product_boost:write",
*        "products:read",
*        "products:write",
*        "ratings:read",
*        "ratings:write",
*        "returns:read",
*        "returns:write",
*        "tickets:read",
*        "tickets:write"
*      ],
*      "merchant_id": "5eb3f605178f5be2c784fa02",
*      "expiry_time": "2020-12-17T16:55:09.594+00:00",
*      "refresh_token": "55a38e44df674a1e859891624b2c4c23"
*    }
*  }

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

RELEASE loOauth2
RELEASE loSbJson