Unicode C

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. Unicode C

#include <C_CkOAuth2W.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkOAuth2W oauth2;
    const wchar_t *url;
    int numMsWaited;
    HCkStringBuilderW sbJson;

    success = FALSE;

    //  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.

    oauth2 = CkOAuth2W_Create();

    //  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
    CkOAuth2W_putAppCallbackUrl(oauth2,L"https://yourwebserver.com/OAuth2.php");
    CkOAuth2W_putListenPort(oauth2,3017);

    CkOAuth2W_putAuthorizationEndpoint(oauth2,L"https://merchant.wish.com/v3/oauth/authorize");
    CkOAuth2W_putTokenEndpoint(oauth2,L"https://merchant.wish.com/api/v3/oauth/access_token");

    CkOAuth2W_putUncommonOptions(oauth2,L"EXCHANGE_CODE_FOR_TOKEN_USING_GET");

    //  Replace these with actual values.
    CkOAuth2W_putClientId(oauth2,L"WISH-CLIENT-ID");
    CkOAuth2W_putClientSecret(oauth2,L"WISH-CLIENT-SECRET");

    CkOAuth2W_putScope(oauth2,L"");

    //  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
    url = CkOAuth2W_startAuth(oauth2);
    if (CkOAuth2W_getLastMethodSuccess(oauth2) != TRUE) {
        wprintf(L"%s\n",CkOAuth2W_lastErrorText(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    wprintf(L"url = %s\n",url);

    //  Launch the default browser on the system and navigate to the url.
    //  The LaunchBrowser method was added in Chilkat v10.1.2.
    success = CkOAuth2W_LaunchBrowser(oauth2,url);
    if (success == FALSE) {
        wprintf(L"%s\n",CkOAuth2W_lastErrorText(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    //  Wait for the user to approve or deny authorization in the browser.
    numMsWaited = 0;
    while ((numMsWaited < 90000) && (CkOAuth2W_getAuthFlowState(oauth2) < 3)) {
        CkOAuth2W_SleepMs(oauth2,100);
        numMsWaited = numMsWaited + 100;
    }

    //  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 (CkOAuth2W_getAuthFlowState(oauth2) < 3) {
        CkOAuth2W_Cancel(oauth2);
        wprintf(L"No response from the browser!\n");
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    //  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 (CkOAuth2W_getAuthFlowState(oauth2) == 5) {
        wprintf(L"OAuth2 failed to complete.\n");
        wprintf(L"%s\n",CkOAuth2W_failureInfo(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    if (CkOAuth2W_getAuthFlowState(oauth2) == 4) {
        wprintf(L"OAuth2 authorization was denied.\n");
        wprintf(L"%s\n",CkOAuth2W_accessTokenResponse(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    if (CkOAuth2W_getAuthFlowState(oauth2) != 3) {
        wprintf(L"Unexpected AuthFlowState:%d\n",CkOAuth2W_getAuthFlowState(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    //  Save the full JSON access token response to a file.
    sbJson = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbJson,CkOAuth2W_accessTokenResponse(oauth2));
    CkStringBuilderW_WriteFile(sbJson,L"qa_data/tokens/wish.json",L"utf-8",FALSE);

    //  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"
    //    }
    //  }

    wprintf(L"OAuth2 authorization granted!\n");
    wprintf(L"Access Token = %s\n",CkOAuth2W_accessToken(oauth2));


    CkOAuth2W_Dispose(oauth2);
    CkStringBuilderW_Dispose(sbJson);

    }