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(Unicode C) Shopify OAuth2 AuthenticationDemonstrates obtaining an access token for a Shopify application using OAuth2 authentication. This example is for non-web-apps, and requires that a browser window be displayed to get authorization from the user. A web-based application would not obtain an OAuth2 token in this way, because the redirect URL would route back to the web application. Note: Once an access token is in hand, the remainder of the Chilkat examples, which use an already-obtained access token, apply to both web and non-web apps.
#include <C_CkOAuth2W.h> #include <C_CkStringBuilderW.h> void ChilkatSample(void) { HCkOAuth2W oauth2; BOOL success; const wchar_t *url; int numMsWaited; HCkStringBuilderW sbJson; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. oauth2 = CkOAuth2W_Create(); // This should be the port in the localhost callback URL for your app. // The callback URL would look like "http://localhost:3017/" if the port number is 3017. // Make sure that "http://localhost:3017/" is listed in your Whitelisted Redirection URLs for your Shopify app. CkOAuth2W_putListenPort(oauth2,3017); // The full content of the Authorization Endpoin for Shopify looks like this: // https://{shop}.myshopify.com/admin/oauth/authorize?client_id={api_key}&scope={scopes}&redirect_uri={redirect_uri}&state={nonce}&grant_options[]={option} // Replace "chilkat" with your shop name. CkOAuth2W_putAuthorizationEndpoint(oauth2,L"https://chilkat.myshopify.com/admin/oauth/authorize"); CkOAuth2W_putTokenEndpoint(oauth2,L"https://chilkat.myshopify.com/admin/oauth/access_token"); // Replace these with actual values. CkOAuth2W_putClientId(oauth2,L"SHOPIFY_API_KEY"); CkOAuth2W_putClientSecret(oauth2,L"SHOPIFY_API_SECRET_KEY"); CkOAuth2W_putCodeChallenge(oauth2,TRUE); CkOAuth2W_putCodeChallengeMethod(oauth2,L"S256"); // Set requested scopes. See https://help.shopify.com/api/getting-started/authentication/oauth CkOAuth2W_putScope(oauth2,L"read_product_listings,read_customers,read_orders,read_draft_orders"); // Begin the OAuth2 three-legged 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); // At this point, your application should load the URL in a browser. // For example, // in C#: System.Diagnostics.Process.Start(url); // in Java: Desktop.getDesktop().browse(new URI(url)); // in VBScript: Set wsh=WScript.CreateObject("WScript.Shell") // wsh.Run url // in Xojo: ShowURL(url) (see http://docs.xojo.com/index.php/ShowURL) // in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl // The Google account owner would interactively accept or deny the authorization request. // Add the code to load the url in a web browser here... // Add the code to load the url in a web browser here... // Add the code to load the url in a web browser here... // System.Diagnostics.Process.Start(url); // Now wait for the authorization. // We'll wait for a max of 30 seconds. numMsWaited = 0; while ((numMsWaited < 30000) && (CkOAuth2W_getAuthFlowState(oauth2) < 3)) { CkOAuth2W_SleepMs(oauth2,100); numMsWaited = numMsWaited + 100; } // If there was no response from the browser within 30 seconds, then // the AuthFlowState will be equal to 1 or 2. // 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser. // 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response. // In that case, cancel the background task started in the call to StartAuth. if (CkOAuth2W_getAuthFlowState(oauth2) < 3) { CkOAuth2W_Cancel(oauth2); wprintf(L"No response from the browser!\n"); CkOAuth2W_Dispose(oauth2); return; } // Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred // The possible AuthFlowState values are: // 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property. // 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property. // 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property. 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; } wprintf(L"OAuth2 authorization granted!\n"); wprintf(L"Access Token = %s\n",CkOAuth2W_accessToken(oauth2)); // 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/shopify-access-token.json",L"utf-8",FALSE); // The saved JSON response looks like this: // { // "access_token": "1364e43a5332583188cb27bc85469b1f", // "scope": "read_product_listings,read_customers,read_orders,read_draft_orders" // } CkOAuth2W_Dispose(oauth2); CkStringBuilderW_Dispose(sbJson); } |
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