(Tcl) Upload String to Google Cloud Storage

Demonstrates how to upload an in-memory string to Google Cloud Storage.

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

CkHttp_put_AuthToken $http [CkStringBuilder_getAsString $sbToken]

# Create an XML document, and write it to a StringBuilder.
# We'll be uploading this XML document.
set xml [new_CkXml]

CkXml_put_Tag $xml "note"
CkXml_UpdateChildContent $xml "to" "Tove"
CkXml_UpdateChildContent $xml "from" "Jani"
CkXml_UpdateChildContent $xml "heading" "Reminder"
CkXml_UpdateChildContent $xml "body" "Don't forget me this weekend!"

# Write the XML to sbXml.
set sbXml [new_CkStringBuilder]

CkXml_GetXmlSb $xml $sbXml

# sbXml contains this:

# <note>
#     <to>Tove</to>
#     <from>Jani</from>
#     <heading>Reminder</heading>
#     <body>Don't forget me this weekend!</body>
# </note>

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

# Note: The PTextSb method first appears in Chilkat v9.5.0.69
# resp is a CkHttpResponse
set resp [CkHttp_PTextSb $http "POST" $url $sbXml "utf-8" "application/xml" 0 0]
if {[CkHttp_get_LastMethodSuccess $http] == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkStringBuilder $sbToken
    delete_CkHttp $http
    delete_CkXml $xml
    delete_CkStringBuilder $sbXml
    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_CkXml $xml
    delete_CkStringBuilder $sbXml
    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/test.xml/1502669565429870",
#  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/test.xml",
#  "name": "test.xml",
#  "bucket": "chilkat-ocean",
#  "generation": "1502669565429870",
#  "metageneration": "1",
#  "contentType": "application/xml",
#  "timeCreated": "2017-08-14T00:12:45.379Z",
#  "updated": "2017-08-14T00:12:45.379Z",
#  "storageClass": "MULTI_REGIONAL",
#  "timeStorageClassUpdated": "2017-08-14T00:12:45.379Z",
#  "size": "181",
#  "md5Hash": "TCR0L7TWsw2TzOvfNvgEfA==",
#  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/test.xml?generation=1502669565429870&alt=media",
#  "crc32c": "ZFd5sA==",
#  "etag": "CO6Qpq241dUCEAE="
# }

delete_CkHttpResponse $resp


delete_CkStringBuilder $sbToken
delete_CkHttp $http
delete_CkXml $xml
delete_CkStringBuilder $sbXml