B4X

Google Drive - Upload File

See more Google Drive Examples

This example demonstrates how to upload a file to Google Drive. The assumption is that the file can be loaded into memory and uploaded. It is also possible to stream large files to Google Drive, but the code required is a little more complex. B4X

Dim success As Boolean = False

success = True

'  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 
'  Google Drive scope. 
'  See Get Google Drive OAuth2 Access Token

Dim gAuth As ChilkatAuthGoogle
gAuth.Initialize("gAuth")
gAuth.AccessToken = "GOOGLE_DRIVE_ACCESS_TOKEN"

Dim rest As ChilkatRest
rest.Initialize("rest")

'  Connect using TLS.
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)

'  -------------------------------------------------------------------------
'  A multipart upload to Google Drive needs a multipart/related Content-Type
rest.AddHeader("Content-Type", "multipart/related")

'  Specify each part of the request.

'  The 1st part is JSON with information about the file.
rest.PartSelector = "1"
rest.AddHeader("Content-Type", "application/json; charset=UTF-8")

'  Construct the JSON that will contain the metadata about the file data to be uploaded...
Dim json As ChilkatJsonObject
json.Initialize
json.AppendString("name", "starfish.jpg")
json.AppendString("description", "A picture of a starfish.")
json.AppendString("mimeType", "image/jpeg")

'  To place the file in a folder, we must add a parents[] array to the JSON
'  and add the folder ID.  
'  In a previous example (see Lookup Google Drive Folder ID
'  we showed how to find the folder ID for a folder in Google Drive.

'  Use the folder ID we already looked up..
Dim folderId As String = "1Fksv-TfA1ILii1YjXsNa1-rDu8Cdrg72"

Dim parents As ChilkatJsonArray
parents.Initialize
json.AppendArray2("parents", parents)

parents.AddStringAt(-1, folderId)

rest.SetMultipartBodyString(json.Emit)

'  The 2nd part is the file content, which will contain the binary image data.
rest.PartSelector = "2"
rest.AddHeader("Content-Type", "image/jpeg")

Dim jpgBytes As ChilkatBinData
jpgBytes.Initialize
success = jpgBytes.LoadFile("qa_data/jpg/starfish.jpg")

'  Add the data to our upload
rest.SetMultipartBodyBd(jpgBytes)

Dim jsonResponse As String = rest.FullRequestMultipart("POST", "/upload/drive/v3/files?uploadType=multipart")
If rest.LastMethodSuccess = False Then
    Log(rest.LastErrorText)
    Return
End If


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


json.Load(jsonResponse)

'  Show the full JSON response.
json.EmitCompact = False
Log(json.Emit)

'  A successful response looks like this:
'  {
'    "kind": "drive#file",
'    "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
'    "name": "starfish.jpg",
'    "mimeType": "image/jpeg"
'  }

'  Get the fileId:
Log("fileId: " & json.StringOf("id"))