Visual FoxPro

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