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Tcl Examples

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(Tcl) Google Drive - Upload File

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.

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

set 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

set gAuth [new_CkAuthGoogle]

CkAuthGoogle_put_AccessToken $gAuth "GOOGLE-DRIVE-ACCESS-TOKEN"

set rest [new_CkRest]

#  Connect using TLS.
set bAutoReconnect 1
set success [CkRest_Connect $rest "www.googleapis.com" 443 1 $bAutoReconnect]

#  Provide the authentication credentials (i.e. the access token)
CkRest_SetAuthGoogle $rest $gAuth

#  -------------------------------------------------------------------------
#  A multipart upload to Google Drive needs a multipart/related Content-Type
CkRest_AddHeader $rest "Content-Type" "multipart/related"

#  Specify each part of the request.

#  The 1st part is JSON with information about the file.
CkRest_put_PartSelector $rest "1"
CkRest_AddHeader $rest "Content-Type" "application/json; charset=UTF-8"

#  Construct the JSON that will contain the metadata about the file data to be uploaded...
set json [new_CkJsonObject]

CkJsonObject_AppendString $json "name" "starfish.jpg"
CkJsonObject_AppendString $json "description" "A picture of a starfish."
CkJsonObject_AppendString $json "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..
set folderId "1Fksv-TfA1ILii1YjXsNa1-rDu8Cdrg72"
# parents is a CkJsonArray
set parents [CkJsonObject_AppendArray $json "parents"]
CkJsonArray_AddStringAt $parents -1 $folderId
delete_CkJsonArray $parents

CkRest_SetMultipartBodyString $rest [CkJsonObject_emit $json]

#  The 2nd part is the file content, which will contain the binary image data.
CkRest_put_PartSelector $rest "2"
CkRest_AddHeader $rest "Content-Type" "image/jpeg"

set jpgBytes [new_CkBinData]

set success [CkBinData_LoadFile $jpgBytes "qa_data/jpg/starfish.jpg"]

#  Add the data to our upload
CkRest_SetMultipartBodyBd $rest $jpgBytes

set jsonResponse [CkRest_fullRequestMultipart $rest "POST" "/upload/drive/v3/files?uploadType=multipart"]
if {[expr [CkRest_get_LastMethodSuccess $rest] != 1]} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    delete_CkBinData $jpgBytes
    exit
}

#  A successful response will have a status code equal to 200.
if {[expr [CkRest_get_ResponseStatusCode $rest] != 200]} then {
    puts "response status code = [CkRest_get_ResponseStatusCode $rest]"
    puts "response status text = [CkRest_responseStatusText $rest]"
    puts "response header: [CkRest_responseHeader $rest]"
    puts "response JSON: $jsonResponse"
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    delete_CkBinData $jpgBytes
    exit
}

CkJsonObject_Load $json $jsonResponse

#  Show the full JSON response.
CkJsonObject_put_EmitCompact $json 0
puts [CkJsonObject_emit $json]

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

#  Get the fileId:
puts "fileId: [CkJsonObject_stringOf $json id]"

delete_CkAuthGoogle $gAuth
delete_CkRest $rest
delete_CkJsonObject $json
delete_CkBinData $jpgBytes

 

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