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 <C_CkOAuth2W.h>
#include <C_CkRestW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkOAuth2W oauth2;
    HCkRestW rest;
    const wchar_t *photoId;
    HCkStringBuilderW sbPath;
    const wchar_t *responseJson;
    HCkJsonObjectW json;
    BOOL canDelete;
    int height;
    int width;

    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
    oauth2 = CkOAuth2W_Create();
    CkOAuth2W_putAccessToken(oauth2,L"FACEBOOK-ACCESS-TOKEN");

    rest = CkRestW_Create();

    // Connect to Facebook...
    success = CkRestW_Connect(rest,L"graph.facebook.com",443,TRUE,TRUE);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkOAuth2W_Dispose(oauth2);
        CkRestW_Dispose(rest);
        return;
    }

    // Provide the authentication credentials (i.e. the access key)
    CkRestW_SetAuthOAuth2(rest,oauth2);

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

    sbPath = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbPath,L"/v2.7/");
    CkStringBuilderW_Append(sbPath,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/
    CkRestW_AddQueryParam(rest,L"fields",L"id,album,can_delete,can_tag,from,height,width,images,link,name,name_tags,picture,place,target");

    responseJson = CkRestW_fullRequestNoBody(rest,L"GET",CkStringBuilderW_getAsString(sbPath));
    if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkOAuth2W_Dispose(oauth2);
        CkRestW_Dispose(rest);
        CkStringBuilderW_Dispose(sbPath);
        return;
    }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_putEmitCompact(json,FALSE);
    CkJsonObjectW_Load(json,responseJson);

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

    // A sample response is shown below.
    // Demonstrate how to parse values from the JSON.
    wprintf(L"Album name: %s\n",CkJsonObjectW_stringOf(json,L"album.name"));
    canDelete = CkJsonObjectW_BoolOf(json,L"can_delete");
    wprintf(L"Can Delete: %d\n",canDelete);
    wprintf(L"From Name: %s\n",CkJsonObjectW_stringOf(json,L"from.name"));
    height = CkJsonObjectW_IntOf(json,L"height");
    width = CkJsonObjectW_IntOf(json,L"width");
    wprintf(L"Dimensions: %dx%d\n",width,height);
    wprintf(L"First Image Source: %s\n",CkJsonObjectW_stringOf(json,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"
    // }
    // 


    CkOAuth2W_Dispose(oauth2);
    CkRestW_Dispose(rest);
    CkStringBuilderW_Dispose(sbPath);
    CkJsonObjectW_Dispose(json);

    }