C++

Get Individual Photo Info

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Assuming we have the ID of a Photo, this example demonstrates how to retrieve the photo information and parse the JSON. C++

#include <CkOAuth2.h>
#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.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 != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

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

    //  Assumes we've already obtained a Photo ID.
    const char *photoId = "10210199026347451";

    CkStringBuilder sbPath;
    sbPath.Append("/v2.7/");
    sbPath.Append(photoId);

    //  Select the fields we want.
    //  This example will select many of the possible fields.
    //  See https://developers.facebook.com/docs/graph-api/reference/photo/
    rest.AddQueryParam("fields","id,album,can_delete,can_tag,from,height,width,images,link,name,name_tags,picture,place,target");

    const char *responseJson = rest.fullRequestNoBody("GET",sbPath.getAsString());
    if (rest.get_LastMethodSuccess() != true) {
        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 response is shown below.
    //  Demonstrate how to parse values from the JSON.
    std::cout << "Album name: " << json.stringOf("album.name") << "\r\n";
    bool canDelete = json.BoolOf("can_delete");
    std::cout << "Can Delete: " << canDelete << "\r\n";
    std::cout << "From Name: " << json.stringOf("from.name") << "\r\n";
    int height = json.IntOf("height");
    int width = json.IntOf("width");
    std::cout << "Dimensions: " << width << "x" << height << "\r\n";
    std::cout << "First Image Source: " << json.stringOf("images[0].source") << "\r\n";

    //  A sample JSON response is shown here.  
    //  { 
    //    "id": "10210199026347451",
    //    "album": { 
    //      "created_time": "2009-10-19T00:06:46+0000",
    //      "name": "Timeline Photos",
    //      "id": "1237223526054"
    //    },
    //    "can_delete": true,
    //    "can_tag": true,
    //    "from": { 
    //      "name": "Matt Smith",
    //      "id": "10224048320139890"
    //    },
    //    "height": 120,
    //    "width": 120,
    //    "images": [
    //      { 
    //        "height": 120,
    //        "source": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195",
    //        "width": 120
    //      }
    //    ],
    //    "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026347451&set=a.1237223526054.2038240.1093202869&type=3",
    //    "name": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
    //    "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195"
    //  }
    //
    }