Tcl Google Cloud Storage: Copy File (Object) to another Bucket

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Copies a fie (also known as an object) to another Google Cloud Storage bucket. This example copies the file "starfish.jpg" from the "chilkat-test" bucket to the "chilkat-images" bucket. In Google Cloud Storage, moving a file to a new bucket is a 2-step operation: First copy the file, then delete the original.

Documentation: https://cloud.google.com/storage/docs/renaming-copying-moving-objects

CURL Command

curl -X POST https://www.googleapis.com/storage/v1/b/chilkat-bucket/o/starfish.jpg/rewriteTo/b/chilkat-images/o/starfish.jpg?project=MY_CLOUD_STORAGE_PROJECT \
    --header "Authorization: Bearer CLOUD_STORAGE_TOKEN"

Tcl Example


load ./chilkat.dll

set rest [new_CkRest]

#  URL: https://www.googleapis.com/storage/v1/b/chilkat-bucket/o/starfish.jpg/rewriteTo/b/chilkat-images/o/starfish.jpg?project=MY_CLOUD_STORAGE_PROJECT
set bTls 1
set port 443
set bAutoReconnect 1
set success [CkRest_Connect $rest "www.googleapis.com" $port $bTls $bAutoReconnect]
if {[expr $success != 1]} then {
    puts "ConnectFailReason: [CkRest_get_ConnectFailReason $rest]"
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    exit
}

CkRest_AddHeader $rest "Authorization" "Bearer CLOUD_STORAGE_TOKEN"

set sbResponseBody [new_CkStringBuilder]

set success [CkRest_FullRequestNoBodySb $rest "POST" "/storage/v1/b/chilkat-bucket/o/starfish.jpg/rewriteTo/b/chilkat-images/o/starfish.jpg?project=MY_CLOUD_STORAGE_PROJECT" $sbResponseBody]
if {[expr $success != 1]} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkStringBuilder $sbResponseBody
    exit
}

set respStatusCode [CkRest_get_ResponseStatusCode $rest]
if {[expr $respStatusCode >= 400]} then {
    puts "Response Status Code = $respStatusCode"
    puts "Response Header:"
    puts [CkRest_responseHeader $rest]
    puts "Response Body:"
    puts [CkStringBuilder_getAsString $sbResponseBody]
    delete_CkRest $rest
    delete_CkStringBuilder $sbResponseBody
    exit
}

set jsonResponse [new_CkJsonObject]

CkJsonObject_LoadSb $jsonResponse $sbResponseBody

#  See the Online Tool for Generating JSON Parse Code

set kind [CkJsonObject_stringOf $jsonResponse "kind"]
set totalBytesRewritten [CkJsonObject_stringOf $jsonResponse "totalBytesRewritten"]
set objectSize [CkJsonObject_stringOf $jsonResponse "objectSize"]
set done [CkJsonObject_BoolOf $jsonResponse "done"]
set resourceKind [CkJsonObject_stringOf $jsonResponse "resource.kind"]
set resourceId [CkJsonObject_stringOf $jsonResponse "resource.id"]
set resourceSelfLink [CkJsonObject_stringOf $jsonResponse "resource.selfLink"]
set resourceName [CkJsonObject_stringOf $jsonResponse "resource.name"]
set resourceBucket [CkJsonObject_stringOf $jsonResponse "resource.bucket"]
set resourceGeneration [CkJsonObject_stringOf $jsonResponse "resource.generation"]
set resourceMetageneration [CkJsonObject_stringOf $jsonResponse "resource.metageneration"]
set resourceContentType [CkJsonObject_stringOf $jsonResponse "resource.contentType"]
set resourceTimeCreated [CkJsonObject_stringOf $jsonResponse "resource.timeCreated"]
set resourceUpdated [CkJsonObject_stringOf $jsonResponse "resource.updated"]
set resourceStorageClass [CkJsonObject_stringOf $jsonResponse "resource.storageClass"]
set resourceTimeStorageClassUpdated [CkJsonObject_stringOf $jsonResponse "resource.timeStorageClassUpdated"]
set resourceSize [CkJsonObject_stringOf $jsonResponse "resource.size"]
set resourceMd5Hash [CkJsonObject_stringOf $jsonResponse "resource.md5Hash"]
set resourceMediaLink [CkJsonObject_stringOf $jsonResponse "resource.mediaLink"]
set resourceCrc32c [CkJsonObject_stringOf $jsonResponse "resource.crc32c"]
set resourceEtag [CkJsonObject_stringOf $jsonResponse "resource.etag"]

delete_CkRest $rest
delete_CkStringBuilder $sbResponseBody
delete_CkJsonObject $jsonResponse

Sample JSON Response Body

{
  "kind": "storage#rewriteResponse",
  "totalBytesRewritten": "6229",
  "objectSize": "6229",
  "done": true,
  "resource": {
    "kind": "storage#object",
    "id": "chilkat-images/starfish.jpg/1540298057547474",
    "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-images/o/starfish.jpg",
    "name": "starfish.jpg",
    "bucket": "chilkat-images",
    "generation": "1540298057547474",
    "metageneration": "1",
    "contentType": "image/jpeg",
    "timeCreated": "2018-10-23T12:34:17.547Z",
    "updated": "2018-10-23T12:34:17.547Z",
    "storageClass": "MULTI_REGIONAL",
    "timeStorageClassUpdated": "2018-10-23T12:34:17.547Z",
    "size": "6229",
    "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
    "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-images/o/starfish.jpg?generation=1540298057547474&alt=media",
    "crc32c": "9RjgwQ==",
    "etag": "CNL9xbTJnN4CEAE="
  }
}