(Unicode 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 <C_CkOAuth2W.h>
#include <C_CkRestW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkUrlW.h>

void ChilkatSample(void)
    {
    HCkOAuth2W oauth2;
    HCkRestW rest;
    BOOL success;
    const wchar_t *responseJson;
    HCkJsonObjectW json;
    HCkUrlW nextUrl;
    const wchar_t *nextUrlStr;

    // 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
    oauth2 = CkOAuth2W_Create();
    CkOAuth2W_putAccessToken(oauth2,L"FACEBOOK-ACCESS-TOKEN");

    rest = CkRestW_Create();

    // Connect to Facebook and send the following GET request:
    success = CkRestW_Connect(rest,L"graph.facebook.com",443,TRUE,TRUE);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkOAuth2W_Dispose(oauth2);
        CkRestW_Dispose(rest);
        return;
    }

    // Provide the authentication credentials (i.e. the access key)
    CkRestW_SetAuthOAuth2(rest,oauth2);

    // Gets the 1st page in the user's feed.
    responseJson = CkRestW_fullRequestNoBody(rest,L"GET",L"/v2.7/me/feed");
    if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkOAuth2W_Dispose(oauth2);
        CkRestW_Dispose(rest);
        return;
    }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_putEmitCompact(json,FALSE);
    CkJsonObjectW_Load(json,responseJson);

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

    nextUrl = CkUrlW_Create();

    // Get the URL for the next page in the feed.
    nextUrlStr = CkJsonObjectW_stringOf(json,L"paging.next");
    while (CkJsonObjectW_getLastMethodSuccess(json) == TRUE) {

        wprintf(L"Next page URL: %s\n",nextUrlStr);

        CkUrlW_ParseUrl(nextUrl,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.
        CkRestW_ClearAllQueryParams(rest);
        CkRestW_AddQueryParams(rest,CkUrlW_query(nextUrl));

        responseJson = CkRestW_fullRequestNoBody(rest,L"GET",L"/v2.7/me/feed");
        if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
            wprintf(L"%s\n",CkRestW_lastErrorText(rest));
            CkOAuth2W_Dispose(oauth2);
            CkRestW_Dispose(rest);
            CkJsonObjectW_Dispose(json);
            CkUrlW_Dispose(nextUrl);
            return;
        }

        CkJsonObjectW_Load(json,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 = CkJsonObjectW_stringOf(json,L"paging.next");
    }

    wprintf(L"No more pages in the feed.\n");


    CkOAuth2W_Dispose(oauth2);
    CkRestW_Dispose(rest);
    CkJsonObjectW_Dispose(json);
    CkUrlW_Dispose(nextUrl);

    }