PowerBuilder

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. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_GAuth
oleobject loo_Rest
integer li_BAutoReconnect
oleobject loo_Json
string ls_FolderId
oleobject loo_Parents
oleobject loo_JpgBytes
string ls_JsonResponse

li_Success = 0

li_Success = 1

// 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

loo_GAuth = create oleobject
li_rc = loo_GAuth.ConnectToNewObject("Chilkat.AuthGoogle")
if li_rc < 0 then
    destroy loo_GAuth
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_GAuth.AccessToken = "GOOGLE_DRIVE_ACCESS_TOKEN"

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat.Rest")

// Connect using TLS.
li_BAutoReconnect = 1
li_Success = loo_Rest.Connect("www.googleapis.com",443,1,li_BAutoReconnect)

// Provide the authentication credentials (i.e. the access token)
loo_Rest.SetAuthGoogle(loo_GAuth)

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

// Specify each part of the request.

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

// Construct the JSON that will contain the metadata about the file data to be uploaded...
loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.AppendString("name","starfish.jpg")
loo_Json.AppendString("description","A picture of a starfish.")
loo_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..
ls_FolderId = "1Fksv-TfA1ILii1YjXsNa1-rDu8Cdrg72"

loo_Parents = create oleobject
li_rc = loo_Parents.ConnectToNewObject("Chilkat.JsonArray")

loo_Json.AppendArray2("parents",loo_Parents)

loo_Parents.AddStringAt(-1,ls_FolderId)

loo_Rest.SetMultipartBodyString(loo_Json.Emit())

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

loo_JpgBytes = create oleobject
li_rc = loo_JpgBytes.ConnectToNewObject("Chilkat.BinData")

li_Success = loo_JpgBytes.LoadFile("qa_data/jpg/starfish.jpg")

// Add the data to our upload
loo_Rest.SetMultipartBodyBd(loo_JpgBytes)

ls_JsonResponse = loo_Rest.FullRequestMultipart("POST","/upload/drive/v3/files?uploadType=multipart")
if loo_Rest.LastMethodSuccess = 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_GAuth
    destroy loo_Rest
    destroy loo_Json
    destroy loo_Parents
    destroy loo_JpgBytes
    return
end if

// A successful response will have a status code equal to 200.
if loo_Rest.ResponseStatusCode <> 200 then
    Write-Debug "response status code = " + string(loo_Rest.ResponseStatusCode)
    Write-Debug "response status text = " + loo_Rest.ResponseStatusText
    Write-Debug "response header: " + loo_Rest.ResponseHeader
    Write-Debug "response JSON: " + ls_JsonResponse
    destroy loo_GAuth
    destroy loo_Rest
    destroy loo_Json
    destroy loo_Parents
    destroy loo_JpgBytes
    return
end if

loo_Json.Load(ls_JsonResponse)

// Show the full JSON response.
loo_Json.EmitCompact = 0
Write-Debug loo_Json.Emit()

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

// Get the fileId:
Write-Debug "fileId: " + loo_Json.StringOf("id")


destroy loo_GAuth
destroy loo_Rest
destroy loo_Json
destroy loo_Parents
destroy loo_JpgBytes