Unicode C++

Paging User Photos with Cursor

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Demonstrates how to iterate over the pages of user photos using a cursor. Unicode C++

#include <CkOAuth2W.h>
#include <CkRestW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    bool success = false;

    // 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.
    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");
    }