Chilkat Examples

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MFC Web API Examples

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(MFC) Get Individual Photo Info

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

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>

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);

    // 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) {
        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 response is shown below.
    // Demonstrate how to parse values from the JSON.
    strOut.append("Album name: ");
    strOut.append(json.stringOf("album.name"));
    strOut.append("\r\n");
    bool canDelete = json.BoolOf("can_delete");
    strOut.append("Can Delete: ");
    strOut.appendInt(canDelete);
    strOut.append("\r\n");
    strOut.append("From Name: ");
    strOut.append(json.stringOf("from.name"));
    strOut.append("\r\n");
    int height = json.IntOf("height");
    int width = json.IntOf("width");
    strOut.append("Dimensions: ");
    strOut.appendInt(width);
    strOut.append("x");
    strOut.appendInt(height);
    strOut.append("\r\n");
    strOut.append("First Image Source: ");
    strOut.append(json.stringOf("images[0].source"));
    strOut.append("\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"
    // }
    // 


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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