PureBasic
PureBasic
Google Drive - Resumable Upload
See more Google Drive Examples
Demonstrates how to do a resumable upload to Google Drive.Chilkat PureBasic Downloads
IncludeFile "CkJsonObject.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkUrl.pb"
IncludeFile "CkHttpRequest.pb"
IncludeFile "CkHttpResponse.pb"
IncludeFile "CkStringBuilder.pb"
Procedure ChilkatExample()
success.i = 0
; This example requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.
success = 1
; This example uses a previously obtained access token having permission for the
; Google Drive scope.
; See Get Google Drive OAuth2 Access Token
http.i = CkHttp::ckCreate()
If http.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkHttp::setCkAuthToken(http, "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 HttpJson.
; 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"
; }
CkHttp::ckSetRequestHeader(http,"X-Upload-Content-Type","application/zip")
CkHttp::ckSetRequestHeader(http,"X-Upload-Content-Length","1366807")
json.i = CkJsonObject::ckCreate()
If json.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckUpdateString(json,"name","myZip")
resp.i = CkHttpResponse::ckCreate()
If resp.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
success = CkHttp::ckHttpJson(http,"POST","https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable",json,"application/json",resp)
If success = 0
Debug CkHttp::ckLastErrorText(http)
CkHttp::ckDispose(http)
CkJsonObject::ckDispose(json)
CkHttpResponse::ckDispose(resp)
ProcedureReturn
EndIf
statusCode.i = CkHttpResponse::ckStatusCode(resp)
If statusCode <> 200
Debug CkHttpResponse::ckBodyStr(resp)
Debug "response status = " + Str(statusCode)
CkHttp::ckDispose(http)
CkJsonObject::ckDispose(json)
CkHttpResponse::ckDispose(resp)
ProcedureReturn
EndIf
; The session URI is in the "Location" response header:
sbSessionUri.i = CkStringBuilder::ckCreate()
If sbSessionUri.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkStringBuilder::ckAppend(sbSessionUri,CkHttpResponse::ckGetHeaderField(resp,"Location"))
sessionUri.s = CkStringBuilder::ckGetAsString(sbSessionUri)
Debug "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.
CkHttp::ckClearHeaders(http)
; Because the file is likely large, we'll use HttpSReq which allows to to pass an HTTP request object where the body can be streamed directly from a file.
req.i = CkHttpRequest::ckCreate()
If req.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkHttpRequest::setCkContentType(req, "application/zip")
CkHttpRequest::setCkHttpVerb(req, "PUT")
url.i = CkUrl::ckCreate()
If url.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkUrl::ckParseUrl(url,sessionUri)
CkHttpRequest::setCkPath(req, CkUrl::ckPathWithQueryParams(url))
Debug "Path with Query Param: " + CkUrl::ckPathWithQueryParams(url)
; Specify that the request body is to be streamed directly from a file.
success = CkHttpRequest::ckStreamBodyFromFile(req,"qa_data/zips/big.zip")
If success = 0
Debug CkHttpRequest::ckLastErrorText(req)
CkHttp::ckDispose(http)
CkJsonObject::ckDispose(json)
CkHttpResponse::ckDispose(resp)
CkStringBuilder::ckDispose(sbSessionUri)
CkHttpRequest::ckDispose(req)
CkUrl::ckDispose(url)
ProcedureReturn
EndIf
success = CkHttp::ckHttpSReq(http,CkUrl::ckHost(url),CkUrl::ckPort(url),CkUrl::ckSsl(url),req,resp)
If success = 0
Debug CkHttp::ckLastErrorText(http)
CkHttp::ckDispose(http)
CkJsonObject::ckDispose(json)
CkHttpResponse::ckDispose(resp)
CkStringBuilder::ckDispose(sbSessionUri)
CkHttpRequest::ckDispose(req)
CkUrl::ckDispose(url)
ProcedureReturn
EndIf
Debug CkHttpResponse::ckBodyStr(resp)
Debug "response status = " + Str(CkHttpResponse::ckStatusCode(resp))
; Sample output:
; {
; "kind": "drive#file",
; "id": "1rx20i53eurtkVQ-RT7Ry8Ct85PgPYMET",
; "name": "myZip",
; "mimeType": "application/zip"
; }
;
; response status = 200
CkHttp::ckDispose(http)
CkJsonObject::ckDispose(json)
CkHttpResponse::ckDispose(resp)
CkStringBuilder::ckDispose(sbSessionUri)
CkHttpRequest::ckDispose(req)
CkUrl::ckDispose(url)
ProcedureReturn
EndProcedure