(Unicode C++) Read a Single Facebook Post

Demonstrates how to read the contents of a single Facebook post. A post is an individual entry in a profile's feed. The profile could be a user, page, app, or group.

Chilkat C/C++ Library Downloads
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#include <CkOAuth2W.h>
#include <CkRestW.h>
#include <CkStringBuilderW.h>
#include <CkJsonObjectW.h>
#include <CkDateTimeW.h>
#include <CkDtObjW.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);

    // This example assumes a post id was already retrieved.
    // For example, it could've been retrieved by reading the user's feed:
    // See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    const wchar_t *postId = L"10224048320139890_10210156138515282";

    CkStringBuilderW sbPath;
    sbPath.Append(L"/v2.7/");
    sbPath.Append(postId);

    // Select the fields we want.
    // This example will select almost all the possible fields.
    // See https://developers.facebook.com/docs/graph-api/reference/post/
    rest.AddQueryParam(L"fields",L"id,message,created_time,caption,description,from,link,name,object_id,picture,place,privacy,properties,shares,source,status_type,story,targeting,to,type,updated_time,with_tags");

    const wchar_t *responseJson = rest.fullRequestNoBody(L"GET",sbPath.getAsString());
    if (rest.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

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

    // Show the JSON in human-readable format.
    wprintf(L"%s\n",json.emit());

    // A sample JSON response is shown here.  
    // { 
    //   "id": "12345678901234567_12345678900000004",
    //   "message": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
    //   "created_time": "2016-09-29T20:46:18+0000",
    //   "from": { 
    //     "name": "John Doe",
    //     "id": "12345678901234567"
    //   },
    //   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026247451&set=a.1237223526054.2038240.1094202869&type=3",
    //   "object_id": "10210139026347451",
    //   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026647451_7830642117574407060_n.jpg?oh=a7f9ed10ce9cd81a82adeb541c60e2e2&oe=58ABB195",
    //   "privacy": { 
    //     "allow": "",
    //     "deny": "",
    //     "description": "Public",
    //     "friends": "",
    //     "value": "EVERYONE"
    //   },
    //   "status_type": "added_photos",
    //   "type": "photo",
    //   "updated_time": "2016-09-29T20:46:18+0000"
    // }

    // This is the code to parse some fields in the JSON response.
    wprintf(L"type: %s\n",json.stringOf(L"type"));
    wprintf(L"message: %s\n",json.stringOf(L"message"));
    wprintf(L"id: %s\n",json.stringOf(L"id"));
    wprintf(L"link: %s\n",json.stringOf(L"link"));
    wprintf(L"privacy descripton: %s\n",json.stringOf(L"privacy.description"));

    CkDateTimeW dtime;
    bool bLocalTime = true;
    dtime.SetFromTimestamp(json.stringOf(L"created_time"));
    CkDtObjW *dt = dtime.GetDtObj(bLocalTime);
    wprintf(L"%d/%d/%d  %d:%d\n",dt->get_Month(),dt->get_Day(),dt->get_Year(),dt->get_Hour(),dt->get_Minute());
    delete dt;
    }