C++

Read a Single Facebook Post

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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. C++

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

    CkRest rest;

    //  Connect to Facebook...
    success = rest.Connect("graph.facebook.com",443,true,true);
    if (success == false) {
        std::cout << rest.lastErrorText() << "\r\n";
        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 char *postId = "10224048320139890_10210156138515282";

    CkStringBuilder sbPath;
    sbPath.Append("/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("fields","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 char *responseJson = rest.fullRequestNoBody("GET",sbPath.getAsString());
    if (rest.get_LastMethodSuccess() == false) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

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

    //  Show the JSON in human-readable format.
    std::cout << json.emit() << "\r\n";

    //  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.
    std::cout << "type: " << json.stringOf("type") << "\r\n";
    std::cout << "message: " << json.stringOf("message") << "\r\n";
    std::cout << "id: " << json.stringOf("id") << "\r\n";
    std::cout << "link: " << json.stringOf("link") << "\r\n";
    std::cout << "privacy descripton: " << json.stringOf("privacy.description") << "\r\n";

    CkDateTime dtime;
    bool bLocalTime = true;
    dtime.SetFromTimestamp(json.stringOf("created_time"));
    CkDtObj dt;
    dtime.ToDtObj(bLocalTime,dt);

    std::cout << dt.get_Month() << "/" << dt.get_Day() << "/" << dt.get_Year() << "  " << dt.get_Hour() << ":" << dt.get_Minute() << "\r\n";
    }