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(Unicode C++) Paging User Photos with CursorDemonstrates how to iterate over the pages of user photos using a cursor.
#include <CkOAuth2W.h> #include <CkRestW.h> #include <CkJsonObjectW.h> void ChilkatSample(void) { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // This example assumes a previously obtained an access token CkOAuth2W oauth2; oauth2.put_AccessToken(L"FACEBOOK-ACCESS-TOKEN"); CkRestW rest; // Connect to Facebook. bool success = rest.Connect(L"graph.facebook.com",443,true,true); if (success != true) { wprintf(L"%s\n",rest.lastErrorText()); return; } // Provide the authentication credentials (i.e. the access key) rest.SetAuthOAuth2(oauth2); // Indicate that we only want the photos the user has personally uploaded. rest.AddQueryParam(L"type",L"uploaded"); // We could limit the number of photos per page using the "limit" field. rest.AddQueryParam(L"limit",L"20"); // Get the 1st page of photos. (Not the actual image data, but the information about each photo.) // See https://developers.facebook.com/docs/graph-api/reference/user/photos/ for more information. const wchar_t *responseJson = rest.fullRequestNoBody(L"GET",L"/v2.7/me/photos"); if (rest.get_LastMethodSuccess() != true) { wprintf(L"%s\n",rest.lastErrorText()); return; } CkJsonObjectW json; json.put_EmitCompact(false); json.Load(responseJson); wprintf(L"%s\n",json.emit()); // // See Parsing the Facebook User Photos for code showing how to parse the JSON photos content. // // Get the "after" cursor. const wchar_t *afterCursor = json.stringOf(L"paging.cursors.after"); while (json.get_LastMethodSuccess() == true) { wprintf(L"after cursor: %s\n",afterCursor); // Prepare for getting the next page of photos. // We can continue using the same REST object. // If already connected, we'll continue using the existing connection. // Otherwise, a new connection will automatically be made if needed. rest.ClearAllQueryParams(); rest.AddQueryParam(L"type",L"uploaded"); rest.AddQueryParam(L"limit",L"20"); rest.AddQueryParam(L"after",afterCursor); responseJson = rest.fullRequestNoBody(L"GET",L"/v2.7/me/photos"); if (rest.get_LastMethodSuccess() != true) { wprintf(L"%s\n",rest.lastErrorText()); return; } json.Load(responseJson); // See Parsing the Facebook User Photos for code showing how to parse the JSON photos content. wprintf(L"%s\n",json.emit()); // Get the cursor for the next page. afterCursor = json.stringOf(L"paging.cursors.after"); } wprintf(L"No more pages of photos.\n"); } |
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