(Lianja) 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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// 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.

loJsonToken = createobject("CkJsonObject")
llSuccess = loJsonToken.LoadFile("qa_data/tokens/wish.json")
if (llSuccess <> .T.) then
    ? "Failed to load wish.json"
    release loJsonToken
    return
endif

// 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"
//   }
// }

loOauth2 = createobject("CkOAuth2")

// 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:
loOauth2.TokenEndpoint = "https://merchant.wish.com/api/v3/oauth/refresh_token"

// The following uncommon option was added in Chilkat v9.5.0.85
loOauth2.UncommonOptions = "EXCHANGE_CODE_FOR_TOKEN_USING_GET"

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

// Get the "refresh_token"
loOauth2.RefreshToken = loJsonToken.StringOf("data.refresh_token")

// Send the HTTP request to refresh the access token..
llSuccess = loOauth2.RefreshAccessToken()
if (llSuccess <> .T.) then
    ? loOauth2.LastErrorText
    release loJsonToken
    release loOauth2
    return
endif

// 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.
loSbJson = createobject("CkStringBuilder")
loSbJson.Append(loOauth2.AccessTokenResponse)
loSbJson.WriteFile("qa_data/tokens/wish.json","utf-8",.F.)

? "OAuth2 token refreshed!"
? "New Access Token = " + loOauth2.AccessToken


release loJsonToken
release loOauth2
release loSbJson