(MFC) 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 MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkOAuth2.h>
#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>
#include <CkDateTime.h>
#include <CkDtObj.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // 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...
    bool success = rest.Connect("graph.facebook.com",443,true,true);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        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() != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

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

    // Show the JSON in human-readable format.
    strOut.append(json.emit());
    strOut.append("\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.
    strOut.append("type: ");
    strOut.append(json.stringOf("type"));
    strOut.append("\r\n");
    strOut.append("message: ");
    strOut.append(json.stringOf("message"));
    strOut.append("\r\n");
    strOut.append("id: ");
    strOut.append(json.stringOf("id"));
    strOut.append("\r\n");
    strOut.append("link: ");
    strOut.append(json.stringOf("link"));
    strOut.append("\r\n");
    strOut.append("privacy descripton: ");
    strOut.append(json.stringOf("privacy.description"));
    strOut.append("\r\n");

    CkDateTime dtime;
    bool bLocalTime = true;
    dtime.SetFromTimestamp(json.stringOf("created_time"));
    CkDtObj *dt = dtime.GetDtObj(bLocalTime);
    strOut.appendInt(dt->get_Month());
    strOut.append("/");
    strOut.appendInt(dt->get_Day());
    strOut.append("/");
    strOut.appendInt(dt->get_Year());
    strOut.append("  ");
    strOut.appendInt(dt->get_Hour());
    strOut.append(":");
    strOut.appendInt(dt->get_Minute());
    strOut.append("\r\n");
    delete dt;


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }