(Tcl) Upload Binary File from Memory

This example demonstrates how to upload a binary file from memory. It uploads the file to a subdirectory of our choosing.

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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.

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" "hedgehogs.jpg"
CkJsonObject_AppendString $json "description" "A cute photo of two hedgehogs."
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 Build Local Metadata Cache
# we built a local cache to make it easy to lookup file IDs given a file path.
# Let's find the file ID for the folder "testFolder/abc/123"
set gdCache [new_CkCache]

CkCache_put_Level $gdCache 0
CkCache_AddRoot $gdCache "C:/ckCache/googleDrive"

set folderId [CkCache_fetchText $gdCache "testFolder/abc/123"]
if {[CkCache_get_LastMethodSuccess $gdCache] != 1} then {
    puts "Filepath not found in cache."
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    delete_CkCache $gdCache
    exit
}

# 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 fac [new_CkFileAccess]

set jpgBytes [new_CkByteData]

# Read a JPG file from the local filesystem.
set success [CkFileAccess_ReadEntireFile $fac "qa_data/jpg/hedgehogs.jpg" $jpgBytes]

# Add the bytes to our upload
CkRest_SetMultipartBodyBinary $rest $jpgBytes

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

# A successful response will have a status code equal to 200.
if {[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_CkCache $gdCache
    delete_CkFileAccess $fac
    delete_CkByteData $jpgBytes
    exit
}

# Show the JSON response.
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": "hedgehogs.jpg",
#   "mimeType": "image/jpeg"
# }

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

delete_CkAuthGoogle $gAuth
delete_CkRest $rest
delete_CkJsonObject $json
delete_CkCache $gdCache
delete_CkFileAccess $fac
delete_CkByteData $jpgBytes