Xbase++ 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. Xbase++

LOCAL nSuccess
LOCAL oOauth2
LOCAL cUrl
LOCAL nNumMsWaited
LOCAL oSbJson

nSuccess := 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.

oOauth2 := 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
oOauth2:AppCallbackUrl := "https://yourwebserver.com/OAuth2.php"
oOauth2:ListenPort := 3017

oOauth2:AuthorizationEndpoint := "https://merchant.wish.com/v3/oauth/authorize"
oOauth2:TokenEndpoint := "https://merchant.wish.com/api/v3/oauth/access_token"

oOauth2:UncommonOptions := "EXCHANGE_CODE_FOR_TOKEN_USING_GET"

//  Replace these with actual values.
oOauth2:ClientId := "WISH-CLIENT-ID"
oOauth2:ClientSecret := "WISH-CLIENT-SECRET"

oOauth2:Scope := ""

//  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
cUrl := oOauth2:StartAuth()
IF (oOauth2:LastMethodSuccess != 1)
    ? oOauth2:LastErrorText
    oOauth2:destroy()
    RETURN
ENDIF

? "url = " + cUrl

//  Launch the default browser on the system and navigate to the url.
//  The LaunchBrowser method was added in Chilkat v10.1.2.
nSuccess := oOauth2:LaunchBrowser(cUrl)
IF (nSuccess == 0)
    ? oOauth2:LastErrorText
    oOauth2:destroy()
    RETURN
ENDIF

//  Wait for the user to approve or deny authorization in the browser.
nNumMsWaited := 0
DO WHILE (nNumMsWaited < 90000) .AND. (oOauth2:AuthFlowState < 3)
    oOauth2:SleepMs(100)
    nNumMsWaited := nNumMsWaited + 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 (oOauth2:AuthFlowState < 3)
    oOauth2:Cancel()
    ? "No response from the browser!"
    oOauth2:destroy()
    RETURN
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 (oOauth2:AuthFlowState == 5)
    ? "OAuth2 failed to complete."
    ? oOauth2:FailureInfo
    oOauth2:destroy()
    RETURN
ENDIF

IF (oOauth2:AuthFlowState == 4)
    ? "OAuth2 authorization was denied."
    ? oOauth2:AccessTokenResponse
    oOauth2:destroy()
    RETURN
ENDIF

IF (oOauth2:AuthFlowState != 3)
    ? "Unexpected AuthFlowState:" + Str(oOauth2:AuthFlowState)
    oOauth2:destroy()
    RETURN
ENDIF

//  Save the full JSON access token response to a file.
oSbJson := CreateObject("Chilkat.StringBuilder")
oSbJson:Append(oOauth2:AccessTokenResponse)
oSbJson: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 = " + oOauth2:AccessToken

oOauth2:destroy()
oSbJson:destroy()