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(Visual Basic 6.0) Google Drive - Resumable UploadDemonstrates how to do a resumable upload to Google Drive. For more information, see https://developers.google.com/drive/api/v3/manage-uploads#resumable
' This example requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. Dim success As Long success = 1 ' This example uses a previously obtained access token having permission for the ' Google Drive scope. ' See Get Google Drive OAuth2 Access Token Dim http As New ChilkatHttp http.AuthToken = "GOOGLE_DRIVE_ACCESS_TOKEN" ' First we want to initiate the resumable upload. ' We send a POST to get a session URI, which will be used to upload the file, and resume if needed. ' Our POST will look like this: ' POST https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable HTTP/1.1 ' Authorization: Bearer [YOUR_AUTH_TOKEN] <-- Chilkat automatically adds this header because the AuthToken property was set. ' Content-Length: 38 <-- Chilkat will automatically add this header. ' Content-Type: application/json; charset=UTF-8 <-- This is the type of this POST, and is specified in the call to PostJson3. ' X-Upload-Content-Type: application/zip <-- The type of file we'll be uploading ' X-Upload-Content-Length: 1366807 <-- The size of the file we'll be uploading ' ' { ' "name": "myObject" ' } http.SetRequestHeader "X-Upload-Content-Type","application/zip" http.SetRequestHeader "X-Upload-Content-Length","1366807" Dim json As New ChilkatJsonObject success = json.UpdateString("name","myZip") Dim resp As ChilkatHttpResponse Set resp = http.PostJson3("https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable","application/json",json) If (http.LastMethodSuccess = 0) Then Debug.Print http.LastErrorText Exit Sub End If Dim statusCode As Long statusCode = resp.StatusCode If (statusCode <> 200) Then Debug.Print resp.BodyStr Debug.Print "response status = " & statusCode Exit Sub End If ' The session URI is in the "Location" response header: Dim sbSessionUri As New ChilkatStringBuilder success = sbSessionUri.Append(resp.GetHeaderField("Location")) Dim sessionUri As String sessionUri = sbSessionUri.GetAsString() Debug.Print "Session URI: " & sessionUri ' Here's a sample session URI: https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable&upload_id=AEnB2UrszR8lDqlo3mtXJw_0rYI_Hi1oVh1NPFcLfoyBq9NcSjk85kFopoZaVEgT38OSmLl0XsObPf4iCSJwHlrOvvIJQ_ckIQ ' ----------------------------------------------------------------------------- ' The next step is to upload the file using the session URI: ' We'll send a PUT that looks like this: ' PUT https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable&upload_id=xa298sd_sdlkj2 HTTP/1.1 ' Content-Length: 1366807 ' Content-Type: application/zip ' ' [BYTES 0-1366806] ' First remove the X-Upload-Content-Type and X-Upload-Content-Length request headers we specified earlier, so they don't get sent with subsequent requests. http.ClearHeaders ' Because the file is likely large, we'll use SynchronousRequest which allows to to pass an HTTP request object where the body can be streamed directly from a file. Dim req As New ChilkatHttpRequest req.ContentType = "application/zip" req.HttpVerb = "PUT" Dim url As New ChilkatUrl success = url.ParseUrl(sessionUri) req.Path = url.PathWithQueryParams Debug.Print "Path with Query Param: " & url.PathWithQueryParams ' Specify that the request body is to be streamed directly from a file. success = req.StreamBodyFromFile("qa_data/zips/big.zip") If (success = 0) Then Debug.Print req.LastErrorText Exit Sub End If Set resp = http.SynchronousRequest(url.Host,url.Port,url.Ssl,req) If (http.LastMethodSuccess = 0) Then Debug.Print http.LastErrorText Exit Sub End If Debug.Print resp.BodyStr Debug.Print "response status = " & statusCode ' Sample output: ' { ' "kind": "drive#file", ' "id": "1rx20i53eurtkVQ-RT7Ry8Ct85PgPYMET", ' "name": "myZip", ' "mimeType": "application/zip" ' } ' ' response status = 200 |
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