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(Unicode C) Get eBay Application TokenThis example shows how to request an eBay Application token.
#include <C_CkHttpW.h> #include <C_CkHttpRequestW.h> #include <C_CkHttpResponseW.h> #include <C_CkJsonObjectW.h> #include <C_CkDateTimeW.h> #include <C_CkFileAccessW.h> void ChilkatSample(void) { HCkHttpW http; HCkHttpRequestW req; const wchar_t *endPoint; HCkHttpResponseW resp; HCkJsonObjectW json; const wchar_t *accessToken; HCkDateTimeW dtExpire; HCkFileAccessW fac; BOOL success; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // See the Ebay documentation about Access token types // Also see the Ebay documentation about client credentials grant flow http = CkHttpW_Create(); // If using the sandbox, the target endpoint will be: // POST https://api.sandbox.ebay.com/identity/v1/oauth2/token // If using the production (live) system, the target endpoint will be: // POST https://api.ebay.com/identity/v1/oauth2/token // The eBay client_id and client_secret needs to be sent // in a Basic Authorization request header, which has this format: // Authorization: Basic <B64_encoded_oauth_credentials> // Chilkat takes care of it. You only need to set the Login = client_id, // and password = client_secret, and indicate you want "Basic" HTTP Authorization. CkHttpW_putLogin(http,L"EBAY_CLIENT_ID"); CkHttpW_putPassword(http,L"EBAY_CLIENT_SECRET"); CkHttpW_putBasicAuth(http,TRUE); // Let's do the following POST: // HTTP method: POST // URL (Sandbox): https://api.sandbox.ebay.com/identity/v1/oauth2/token // // HTTP headers: // Content-Type = application/x-www-form-urlencoded // Authorization = Basic <B64-encoded-oauth-credentials> // // Request body (wrapped for readability): // grant_type=client_credentials& // redirect_uri=<RuName-value>& // scope=<SPACE separated list of scopes> // // Create an HttpRequest object to hold the request params. req = CkHttpRequestW_Create(); CkHttpRequestW_putHttpVerb(req,L"POST"); CkHttpRequestW_AddParam(req,L"grant_type",L"client_credentials"); // The scope query param indicates the access to be provided by the token. // Multiple scopes can be specified by separating each with a SPACE char. // See the Ebay OAuth scopes documentation CkHttpRequestW_AddParam(req,L"scope",L"https://api.ebay.com/oauth/api_scope"); // (The PostUrlEncoded method automatically sets the Content-Type header equal to "application/x-www-form-urlencoded") endPoint = L"https://api.sandbox.ebay.com/identity/v1/oauth2/token"; resp = CkHttpW_PostUrlEncoded(http,endPoint,req); if (CkHttpW_getLastMethodSuccess(http) != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); CkHttpW_Dispose(http); CkHttpRequestW_Dispose(req); return; } // The response is JSON.. json = CkJsonObjectW_Create(); CkJsonObjectW_Load(json,CkHttpResponseW_bodyStr(resp)); CkJsonObjectW_putEmitCompact(json,FALSE); // If the response status code is not 200, then it failed. wprintf(L"Response status code = %d\n",CkHttpResponseW_getStatusCode(resp)); if (CkHttpResponseW_getStatusCode(resp) != 200) { wprintf(L"%s\n",CkJsonObjectW_emit(json)); wprintf(L"Failed.\n"); CkHttpW_Dispose(http); CkHttpRequestW_Dispose(req); CkJsonObjectW_Dispose(json); return; } // We successfully retrieved an eBay access token. // The actual access token string can be parsed from the JSON like this: accessToken = CkJsonObjectW_stringOf(json,L"access_token"); // This application token is only valid for 7200 seconds (2 hours). We'll want to refresh // it before it expires. (There is an online example for that..) // For now, let's save the JSON to a file for our application to use. // But before doing that, let's add to the JSON an expiration timestamp // so we know when to refresh the token. dtExpire = CkDateTimeW_Create(); CkDateTimeW_SetFromCurrentSystemTime(dtExpire); CkDateTimeW_AddSeconds(dtExpire,CkJsonObjectW_IntOf(json,L"expires_in")); CkJsonObjectW_AppendString(json,L"expire_time",CkDateTimeW_getAsTimestamp(dtExpire,FALSE)); // Persist the JSON to a file. fac = CkFileAccessW_Create(); success = CkFileAccessW_WriteEntireTextFile(fac,L"qa_data/tokens/ebay.json",CkJsonObjectW_emit(json),L"utf-8",FALSE); if (success != TRUE) { wprintf(L"%s\n",CkFileAccessW_lastErrorText(fac)); wprintf(L"Failed to save eBay Application token to file.\n"); CkHttpW_Dispose(http); CkHttpRequestW_Dispose(req); CkJsonObjectW_Dispose(json); CkDateTimeW_Dispose(dtExpire); CkFileAccessW_Dispose(fac); return; } wprintf(L"%s\n",CkJsonObjectW_emit(json)); wprintf(L"Success.\n"); // The output of this example is: // { // "access_token": "v^1.1#i^1#p^1#I^3#r^0# ... Ajp1BQhJDgAA", // "token_type": "Application Access Token", // "expires_in": 7200, // "refresh_token": "N/A", // "expire_time": "2017-04-16T14:44:20Z" // } // // Success. // CkHttpW_Dispose(http); CkHttpRequestW_Dispose(req); CkJsonObjectW_Dispose(json); CkDateTimeW_Dispose(dtExpire); CkFileAccessW_Dispose(fac); } |
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