Unicode 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. Unicode C++

#include <CkOAuth2W.h>
#include <CkRestW.h>
#include <CkStringBuilderW.h>
#include <CkJsonObjectW.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
    CkOAuth2W oauth2;
    oauth2.put_AccessToken(L"FACEBOOK-ACCESS-TOKEN");

    CkRestW rest;

    // Connect to Facebook...
    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);

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

    CkStringBuilderW sbPath;
    sbPath.Append(L"/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(L"fields",L"id,album,can_delete,can_tag,from,height,width,images,link,name,name_tags,picture,place,target");

    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 response is shown below.
    // Demonstrate how to parse values from the JSON.
    wprintf(L"Album name: %s\n",json.stringOf(L"album.name"));
    bool canDelete = json.BoolOf(L"can_delete");
    wprintf(L"Can Delete: %d\n",canDelete);
    wprintf(L"From Name: %s\n",json.stringOf(L"from.name"));
    int height = json.IntOf(L"height");
    int width = json.IntOf(L"width");
    wprintf(L"Dimensions: %dx%d\n",width,height);
    wprintf(L"First Image Source: %s\n",json.stringOf(L"images[0].source"));

    // 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"
    // }
    // 
    }