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(VB.NET) Get File Metadata

Gets a file's metadata or content by ID.

See Google Drive Files get for additional details.

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Dim success As Boolean = True

'  It requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  This example uses a previously obtained access token having permission for the
'  Google Drive scope.

Dim gAuth As New Chilkat.AuthGoogle
gAuth.AccessToken = "GOOGLE-DRIVE-ACCESS-TOKEN"

Dim rest As New Chilkat.Rest

'  Connect using TLS.
'  A single REST object, once connected, can be used for many Google Drive REST API calls.
'  The auto-reconnect indicates that if the already-established HTTPS connection is closed,
'  then it will be automatically re-established as needed.
Dim bAutoReconnect As Boolean = True
success = rest.Connect("www.googleapis.com",443,True,bAutoReconnect)

'  Provide the authentication credentials (i.e. the access token)
rest.SetAuthGoogle(gAuth)

'  ------------------------------------------------------------------------------

'  We need to send a GET request like this:
'  GET https://www.googleapis.com/drive/v3/files/fileId
'  The fileId is part of the path.
Dim sbPath As New Chilkat.StringBuilder
sbPath.Append("/drive/v3/files/")
'  Assume we previously obtained the fileId for the file of interest...
sbPath.Append("0B53Q6OSTWYolbUF6WS1Gei1oalk")

'  Indicate that we want ALL possible fields.
'  If no fields are indicated, then only the basic fields are returned.
Dim allFields As String = "appProperties,capabilities,contentHints,createdTime,description,explicitlyTrashed,fileExtension,folderColorRgb,fullFileExtension,headRevisionId,iconLink,id,imageMediaMetadata,isAppAuthorized,kind,lastModifyingUser,md5Checksum,mimeType,modifiedByMeTime,modifiedTime,name,originalFilename,ownedByMe,owners,parents,permissions,properties,quotaBytesUsed,shared,sharedWithMeTime,sharingUser,size,spaces,starred,thumbnailLink,trashed,version,videoMediaMetadata,viewedByMe,viewedByMeTime,viewersCanCopyContent,webContentLink,webViewLink,writersCanShare"

rest.AddQueryParam("fields",allFields)

Dim jsonResponse As String = rest.FullRequestNoBody("GET",sbPath.GetAsString())
If (rest.LastMethodSuccess <> True) Then
    Console.WriteLine(rest.LastErrorText)
    Exit Sub
End If


'  A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    Console.WriteLine("response status code = " & rest.ResponseStatusCode)
    Console.WriteLine("response status text = " & rest.ResponseStatusText)
    Console.WriteLine("response header: " & rest.ResponseHeader)
    Console.WriteLine("response JSON: " & jsonResponse)
    Exit Sub
End If


'  ---------------------------------------------------
'  Sample code for parsing this JSON is shown below...
'  ---------------------------------------------------

'  A successful response looks like this:
'  {
'   "kind": "drive#file",
'    "id": "0B53Q6OSTWYolbUF6WS1Gei1oalk",
'    "name": "penguins.jpg",
'    "mimeType": "image/jpeg",
'    "starred": false,
'    "trashed": false,
'    "explicitlyTrashed": false,
'    "parents": [
'      "0B53Q6OSTWYola296ODZUSm5GYU0"
'    ],
'    "spaces": [
'      "drive"
'    ],
'    "version": "672",
'    "webContentLink": "https://docs.google.com/a/chilkatcloud.com/uc?id=0B53Q6OSTWYolbUF6WS1Gei1oalk&export=download",
'    "webViewLink": "https://drive.google.com/a/chilkatcloud.com/file/d/0B53Q6OSTWYolbUF6WS1Gei1oalk/view?usp=drivesdk",
'    "iconLink": "https://ssl.gstatic.com/docs/doclist/images/icon_11_image_list.png",
'    "thumbnailLink": "https://lh5.googleusercontent.com/uIV1dJdc8vsAQzaaIInpc9AV55AcdHhpM7fQeI2RN2qbCSnhjK9IDdNQAOTtkvjS9ZObqw=s220",
'    "viewedByMe": true,
'    "viewedByMeTime": "2016-10-08T12:38:02.258Z",
'    "createdTime": "2016-10-08T12:38:02.258Z",
'    "modifiedTime": "2016-10-08T12:38:02.258Z",
'    "modifiedByMeTime": "2016-10-08T12:38:02.258Z",
'    "owners": [
'      {
'       "kind": "drive#user",
'        "displayName": "John Doe",
'        "me": true,
'        "permissionId": "12348123612340751234",
'        "emailAddress": "support@chilkatcloud.com"
'      }
'    ],
'    "lastModifyingUser": {
'     "kind": "drive#user",
'      "displayName": "John Doe",
'      "me": true,
'      "permissionId": "12348123612340751234",
'      "emailAddress": "support@chilkatcloud.com"
'    },
'    "shared": false,
'    "ownedByMe": true,
'    "capabilities": {
'     "canEdit": true,
'      "canComment": true,
'      "canShare": true,
'      "canCopy": true,
'      "canReadRevisions": true
'    },
'    "viewersCanCopyContent": true,
'    "writersCanShare": true,
'    "permissions": [
'      {
'       "kind": "drive#permission",
'        "id": "12348123612340751234",
'        "type": "user",
'        "emailAddress": "support@chilkatcloud.com",
'        "role": "owner",
'        "displayName": "John Doe"
'      }
'    ],
'    "originalFilename": "penguins.jpg",
'    "fullFileExtension": "jpg",
'    "fileExtension": "jpg",
'    "md5Checksum": "9d377b10ce778c4938b3c7e2c63a229a",
'    "size": "777835",
'    "quotaBytesUsed": "777835",
'    "headRevisionId": "0B53Q6OSTWYolUUlHVFhHdFlXQ0R1aHZuT0tORTVzc2h5NnZjPQ",
'    "imageMediaMetadata": {
'     "width": 1024,
'      "height": 768,
'      "rotation": 0,
'      "time": "2009:03:12 13:48:35"
'    },
'    "isAppAuthorized": false
'  }

'  Iterate over each file in the response and show the name, id, and mimeType.
Dim json As New Chilkat.JsonObject
json.Load(jsonResponse)

'  Show the full JSON response.
json.EmitCompact = False
Console.WriteLine(json.Emit())
Console.WriteLine("-")

'  Demonstrate how to get pieces of information:
Console.WriteLine("Original Filename: " & json.StringOf("originalFilename"))

Dim wasLastModifiedUserMe As Boolean = json.BoolOf("lastModifyingUser.me")
Console.WriteLine("Was Last Modified by Me: " & wasLastModifiedUserMe)

'  Assuming this is an image file...
Dim width As Integer = json.IntOf("imageMediaMetadata.width")
Console.WriteLine("Image Width: " & width)

'  Iterate over parents...
Dim i As Integer
Dim numParents As Integer = json.SizeOfArray("parents")
i = 0
While i < numParents
    json.I = i
    Console.WriteLine("Parent " & i & ": " & json.StringOf("parents[i]"))
    i = i + 1
End While

'  Iterate over owners...
Dim numOwners As Integer = json.SizeOfArray("owners")
i = 0
While i < numOwners
    json.I = i
    Console.WriteLine("Owner " & i & ": kind=" & json.StringOf("owners[i].kind") & " displayName=" & json.StringOf("owners[i].displayName"))
    i = i + 1
End While


'  Iterate over permissions...
Dim numPermissions As Integer = json.SizeOfArray("permissions")
i = 0
While i < numPermissions
    json.I = i
    Console.WriteLine("Permission " & i & ": kind=" & json.StringOf("permissions[i].kind") & " id=" & json.StringOf("permissions[i].id"))
    i = i + 1
End While

 

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