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(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 {[expr $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 {[expr [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 {[expr $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

 

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