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VB.NET UWP/WinRT Examples

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(VB.NET UWP/WinRT) Upload In-Memory Binary Data to Google Cloud Storage

Demonstrates how to upload in-memory binary data to Google Cloud Storage.

Note: This example requires Chilkat v9.5.0.69 or later because it uses the http.PBinaryBd method.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

'  This example 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
'  scope "https://www.googleapis.com/auth/cloud-platform"

'  In this example, Get Google Cloud Storage OAuth2 Access Token,
'  the service account access token was saved to a text file.  This example fetches the access token from the file..
Dim sbToken As New Chilkat.StringBuilder
sbToken.LoadFile("qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8")

'  Send a POST equivalent to this curl command.
'  The content of the file is contained in the request body.

'  curl -X POST --data-binary @[OBJECT] \
'      -H "Authorization: Bearer [OAUTH2_TOKEN]" \
'      -H "Content-Type: [OBJECT_CONTENT_TYPE]" \
'      "https://www.googleapis.com/upload/storage/v1/b/[BUCKET_NAME]/o?uploadType=media&name=[OBJECT_NAME]"

Dim http As New Chilkat.Http

'  Download a JPG image from the Internet, and then upload this JPG to
'  a Google Storage bucket.
Dim jpgUrl As String = "https://www.chilkatsoft.com/images/starfish.jpg"

Dim jpgData As New Chilkat.BinData
Dim success As Boolean = Await http.DownloadBdAsync(jpgUrl,jpgData)
If (success <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


http.AuthToken = sbToken.GetAsString()

'  Construct a URL to upload to an object named "starfish.jpg" in the "chilkat-ocean" bucket.
http.SetUrlVar("bucket_name","chilkat-ocean")
http.SetUrlVar("object_name","starfish.jpg")
Dim url As String = "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}"

'  Note: The PBinaryBd method first appears in Chilkat v9.5.0.69
Dim resp As Chilkat.HttpResponse = Await http.PBinaryBdAsync("POST",url,jpgData,"image/jpeg",False,False)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim responseCode As Integer = resp.StatusCode
If (responseCode = 401) Then
    Debug.WriteLine(resp.BodyStr)
    Debug.WriteLine("If invalid credentials, then it is likely the access token expired.")
    Debug.WriteLine("Your app should automatically fetch a new access token and re-try.")

    Exit Sub
End If


Debug.WriteLine("Response code: " & responseCode)
Debug.WriteLine("Response body")
Debug.WriteLine(resp.BodyStr)

'  A successful response looks like this:
'  Response code: 200
'  Response body
'  {
'   "kind": "storage#object",
'   "id": "chilkat-ocean/starfish.jpg/1502670320090292",
'   "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
'   "name": "starfish.jpg",
'   "bucket": "chilkat-ocean",
'   "generation": "1502670320090292",
'   "metageneration": "1",
'   "contentType": "image/jpeg",
'   "timeCreated": "2017-08-14T00:25:20.040Z",
'   "updated": "2017-08-14T00:25:20.040Z",
'   "storageClass": "MULTI_REGIONAL",
'   "timeStorageClassUpdated": "2017-08-14T00:25:20.040Z",
'   "size": "6229",
'   "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
'   "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1502670320090292&alt=media",
'   "crc32c": "9RjgwQ==",
'   "etag": "CLT5kpW71dUCEAE="
'  }



 

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