(Visual FoxPro) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loOauth2
LOCAL loRest
LOCAL lnSuccess
LOCAL lcPhotoId
LOCAL loSbPath
LOCAL lcResponseJson
LOCAL loJson
LOCAL lnCanDelete
LOCAL lnHeight
LOCAL lnWidth

* 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
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.OAuth2')
loOauth2 = CreateObject('Chilkat.OAuth2')
loOauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Rest')
loRest = CreateObject('Chilkat.Rest')

* Connect to Facebook...
lnSuccess = loRest.Connect("graph.facebook.com",443,1,1)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loOauth2
    RELEASE loRest
    CANCEL
ENDIF

* Provide the authentication credentials (i.e. the access key)
loRest.SetAuthOAuth2(loOauth2)

* Assumes we've already obtained a Photo ID.
lcPhotoId = "10210199026347451"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbPath = CreateObject('Chilkat.StringBuilder')
loSbPath.Append("/v2.7/")
loSbPath.Append(lcPhotoId)

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

lcResponseJson = loRest.FullRequestNoBody("GET",loSbPath.GetAsString())
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loOauth2
    RELEASE loRest
    RELEASE loSbPath
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.EmitCompact = 0
loJson.Load(lcResponseJson)

* Show the JSON in human-readable format.
? loJson.Emit()

* A sample response is shown below.
* Demonstrate how to parse values from the JSON.
? "Album name: " + loJson.StringOf("album.name")
lnCanDelete = loJson.BoolOf("can_delete")
? "Can Delete: " + STR(lnCanDelete)
? "From Name: " + loJson.StringOf("from.name")
lnHeight = loJson.IntOf("height")
lnWidth = loJson.IntOf("width")
? "Dimensions: " + STR(lnWidth) + "x" + STR(lnHeight)
? "First Image Source: " + loJson.StringOf("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"
* }
* 

RELEASE loOauth2
RELEASE loRest
RELEASE loSbPath
RELEASE loJson