B4X
Refresh Wish for Merchants OAuth2 Access Token

Demonstrates how to refresh a Wish OAuth2 access token.
Note: This example requires Chilkat v9.5.0.85.
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Dim success As Boolean = False

'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  See Get Wish OAuth2 Access Token 
'  for sample code showing how to obtain a Wish access token for desktop apps.

'  This example assumes we previously obtained an OAuth2 access token for Wish.

Dim jsonToken As ChilkatJsonObject
jsonToken.Initialize
success = jsonToken.LoadFile("qa_data/tokens/wish.json")
If success <> True Then
    Log("Failed to load wish.json")
    Return
End If


'  The access token JSON looks something 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"
'    }
'  }

Dim oauth2 As ChilkatOAuth2
oauth2.Initialize("oauth2")

'  Note: In most OAuth2 implementations, the token endpoint is the same for both the
'  refresh request and the exchange-code-for-token request (which happens when getting
'  the OAuth2 token for the 1st time).   Wish uses a different URL for the refresh:
oauth2.TokenEndpoint = "https://merchant.wish.com/api/v3/oauth/refresh_token"

'  The following uncommon option was added in Chilkat v9.5.0.85
oauth2.UncommonOptions = "EXCHANGE_CODE_FOR_TOKEN_USING_GET"

'  Replace these with actual values.
oauth2.ClientId = "WISH-CLIENT-ID"
oauth2.ClientSecret = "WISH-CLIENT-SECRET"

'  Get the "refresh_token"
oauth2.RefreshToken = jsonToken.StringOf("data.refresh_token")

'  Send the HTTP request to refresh the access token..
success = oauth2.RefreshAccessToken
If success <> True Then
    Log(oauth2.LastErrorText)
    Return
End If


'  Save the new JSON access token response to a file.
'  The access + refresh tokens contained in this JSON will be needed for the next refresh.
Dim sbJson As ChilkatStringBuilder
sbJson.Initialize
sbJson.Append(oauth2.AccessTokenResponse)
sbJson.WriteFile("qa_data/tokens/wish.json", "utf-8", False)

Log("OAuth2 token refreshed!")
Log("New Access Token = " & oauth2.AccessToken)