Tcl Requires Chilkat v11.0.0+

Google Drive - Resumable Upload

See more Google Drive Examples

Demonstrates how to do a resumable upload to Google Drive. Tcl

load ./chilkat.dll

set success 0

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

set success 1

#  This example uses a previously obtained access token having permission for the 
#  Google Drive scope. 
#  See Get Google Drive OAuth2 Access Token

set http [new_CkHttp]

CkHttp_put_AuthToken $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_SetRequestHeader $http "X-Upload-Content-Type" "application/zip"
CkHttp_SetRequestHeader $http "X-Upload-Content-Length" "1366807"

set json [new_CkJsonObject]

CkJsonObject_UpdateString $json "name" "myZip"

set resp [new_CkHttpResponse]

set success [CkHttp_HttpJson $http "POST" "https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable" $json "application/json" $resp]
if {$success == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    delete_CkJsonObject $json
    delete_CkHttpResponse $resp
    exit
}

set statusCode [CkHttpResponse_get_StatusCode $resp]
if {$statusCode != 200} then {
    puts [CkHttpResponse_bodyStr $resp]
    puts "response status = $statusCode"
    delete_CkHttp $http
    delete_CkJsonObject $json
    delete_CkHttpResponse $resp
    exit
}

#  The session URI is in the "Location" response header:
set sbSessionUri [new_CkStringBuilder]

CkStringBuilder_Append $sbSessionUri [CkHttpResponse_getHeaderField $resp "Location"]
set sessionUri [CkStringBuilder_getAsString $sbSessionUri]
puts "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_ClearHeaders $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.
set req [new_CkHttpRequest]

CkHttpRequest_put_ContentType $req "application/zip"
CkHttpRequest_put_HttpVerb $req "PUT"

set url [new_CkUrl]

CkUrl_ParseUrl $url $sessionUri

CkHttpRequest_put_Path $req [CkUrl_pathWithQueryParams $url]
puts "Path with Query Param: [CkUrl_pathWithQueryParams $url]"

#  Specify that the request body is to be streamed directly from a file.
set success [CkHttpRequest_StreamBodyFromFile $req "qa_data/zips/big.zip"]
if {$success == 0} then {
    puts [CkHttpRequest_lastErrorText $req]
    delete_CkHttp $http
    delete_CkJsonObject $json
    delete_CkHttpResponse $resp
    delete_CkStringBuilder $sbSessionUri
    delete_CkHttpRequest $req
    delete_CkUrl $url
    exit
}

set success [CkHttp_HttpSReq $http [CkUrl_host $url] [CkUrl_get_Port $url] [CkUrl_get_Ssl $url] $req $resp]
if {$success == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    delete_CkJsonObject $json
    delete_CkHttpResponse $resp
    delete_CkStringBuilder $sbSessionUri
    delete_CkHttpRequest $req
    delete_CkUrl $url
    exit
}

puts [CkHttpResponse_bodyStr $resp]
puts "response status = [CkHttpResponse_get_StatusCode $resp]"

#  Sample output:

#  {
#   "kind": "drive#file",
#   "id": "1rx20i53eurtkVQ-RT7Ry8Ct85PgPYMET",
#   "name": "myZip",
#   "mimeType": "application/zip"
#  }
#  
#  response status = 200

delete_CkHttp $http
delete_CkJsonObject $json
delete_CkHttpResponse $resp
delete_CkStringBuilder $sbSessionUri
delete_CkHttpRequest $req
delete_CkUrl $url