(C++) Iterate Pages in Feed

Demonstrates how to read the next page in the user's Facebook feed, and iterates through all of the pages in the Facebook feed.

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#include <CkOAuth2.h>
#include <CkRest.h>
#include <CkJsonObject.h>
#include <CkUrl.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
    CkOAuth2 oauth2;
    oauth2.put_AccessToken("FACEBOOK-ACCESS-TOKEN");

    CkRest rest;

    // Connect to Facebook and send the following GET request:
    bool success = rest.Connect("graph.facebook.com",443,true,true);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // Provide the authentication credentials (i.e. the access key)
    rest.SetAuthOAuth2(oauth2);

    // Gets the 1st page in the user's feed.
    const char *responseJson = rest.fullRequestNoBody("GET","/v2.7/me/feed");
    if (rest.get_LastMethodSuccess() != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    CkJsonObject json;
    json.put_EmitCompact(false);
    json.Load(responseJson);

    // 
    // See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.
    // 

    CkUrl nextUrl;

    // Get the URL for the next page in the feed.
    const char *nextUrlStr = json.stringOf("paging.next");
    while (json.get_LastMethodSuccess() == true) {

        std::cout << "Next page URL: " << nextUrlStr << "\r\n";

        nextUrl.ParseUrl(nextUrlStr);

        // Prepare for getting the next page in the feed.
        // 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.AddQueryParams(nextUrl.query());

        responseJson = rest.fullRequestNoBody("GET","/v2.7/me/feed");
        if (rest.get_LastMethodSuccess() != true) {
            std::cout << rest.lastErrorText() << "\r\n";
            return;
        }

        json.Load(responseJson);
        // See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

        // Get the URL for the next page.
        nextUrlStr = json.stringOf("paging.next");
    }

    std::cout << "No more pages in the feed." << "\r\n";
    }