(Tcl) Upload In-Memory Binary Data to Google Cloud Storage

Demonstrates how to upload in-memory binary data to Google Cloud Storage.

Note: This example requires Chilkat v9.5.0.69 or later because it uses the http.PBinaryBd method.

Chilkat Tcl Extension Downloads Chilkat Tcl Extension Downloads

load ./chilkat.dll

# 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 
# scope "https://www.googleapis.com/auth/cloud-platform"

# In this example, Get Google Cloud Storage OAuth2 Access Token, 
# the service account access token was saved to a text file.  This example fetches the access token from the file..
set sbToken [new_CkStringBuilder]

CkStringBuilder_LoadFile $sbToken "qa_data/tokens/googleCloudStorageAccessToken.txt" "utf-8"

# Send a POST equivalent to this curl command.
# The content of the file is contained in the request body.

# curl -X POST --data-binary @[OBJECT] \
#     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
#     -H "Content-Type: [OBJECT_CONTENT_TYPE]" \
#     "https://www.googleapis.com/upload/storage/v1/b/[BUCKET_NAME]/o?uploadType=media&name=[OBJECT_NAME]"

set http [new_CkHttp]

# Download a JPG image from the Internet, and then upload this JPG to
# a Google Storage bucket.
set jpgUrl "https://www.chilkatsoft.com/images/starfish.jpg"

set jpgData [new_CkBinData]

set success [CkHttp_DownloadBd $http $jpgUrl $jpgData]
if {$success != 1} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkStringBuilder $sbToken
    delete_CkHttp $http
    delete_CkBinData $jpgData
    exit
}

CkHttp_put_AuthToken $http [CkStringBuilder_getAsString $sbToken]

# Construct a URL to upload to an object named "starfish.jpg" in the "chilkat-ocean" bucket.
CkHttp_SetUrlVar $http "bucket_name" "chilkat-ocean"
CkHttp_SetUrlVar $http "object_name" "starfish.jpg"
set url "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}"

# Note: The PBinaryBd method first appears in Chilkat v9.5.0.69
# resp is a CkHttpResponse
set resp [CkHttp_PBinaryBd $http "POST" $url $jpgData "image/jpeg" 0 0]
if {[CkHttp_get_LastMethodSuccess $http] == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkStringBuilder $sbToken
    delete_CkHttp $http
    delete_CkBinData $jpgData
    exit
}

set responseCode [CkHttpResponse_get_StatusCode $resp]
if {$responseCode == 401} then {
    puts [CkHttpResponse_bodyStr $resp]
    puts "If invalid credentials, then it is likely the access token expired."
    puts "Your app should automatically fetch a new access token and re-try."
    delete_CkHttpResponse $resp

    delete_CkStringBuilder $sbToken
    delete_CkHttp $http
    delete_CkBinData $jpgData
    exit
}

puts "Response code: $responseCode"
puts "Response body"
puts [CkHttpResponse_bodyStr $resp]

# A successful response looks like this:
# Response code: 200
# Response body
# {
#  "kind": "storage#object",
#  "id": "chilkat-ocean/starfish.jpg/1502670320090292",
#  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
#  "name": "starfish.jpg",
#  "bucket": "chilkat-ocean",
#  "generation": "1502670320090292",
#  "metageneration": "1",
#  "contentType": "image/jpeg",
#  "timeCreated": "2017-08-14T00:25:20.040Z",
#  "updated": "2017-08-14T00:25:20.040Z",
#  "storageClass": "MULTI_REGIONAL",
#  "timeStorageClassUpdated": "2017-08-14T00:25:20.040Z",
#  "size": "6229",
#  "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
#  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1502670320090292&alt=media",
#  "crc32c": "9RjgwQ==",
#  "etag": "CLT5kpW71dUCEAE="
# }

delete_CkHttpResponse $resp


delete_CkStringBuilder $sbToken
delete_CkHttp $http
delete_CkBinData $jpgData