PureBasic 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"

PureBasic Example

IncludeFile "CkJsonObject.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkRest.pb"

Procedure ChilkatExample()

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i

    ;  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
    bTls.i = 1
    port.i = 443
    bAutoReconnect.i = 1
    success = CkRest::ckConnect(rest,"www.googleapis.com",port,bTls,bAutoReconnect)
    If success <> 1
        Debug "ConnectFailReason: " + Str(CkRest::ckConnectFailReason(rest))
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    CkRest::ckAddHeader(rest,"Authorization","Bearer CLOUD_STORAGE_TOKEN")

    sbResponseBody.i = CkStringBuilder::ckCreate()
    If sbResponseBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkRest::ckFullRequestNoBodySb(rest,"POST","/storage/v1/b/chilkat-bucket/o/starfish.jpg/rewriteTo/b/chilkat-images/o/starfish.jpg?project=MY_CLOUD_STORAGE_PROJECT",sbResponseBody)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    respStatusCode.i = CkRest::ckResponseStatusCode(rest)
    If respStatusCode >= 400
        Debug "Response Status Code = " + Str(respStatusCode)
        Debug "Response Header:"
        Debug CkRest::ckResponseHeader(rest)
        Debug "Response Body:"
        Debug CkStringBuilder::ckGetAsString(sbResponseBody)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    jsonResponse.i = CkJsonObject::ckCreate()
    If jsonResponse.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoadSb(jsonResponse,sbResponseBody)

    ;  See the Online Tool for Generating JSON Parse Code

    kind.s = CkJsonObject::ckStringOf(jsonResponse,"kind")
    totalBytesRewritten.s = CkJsonObject::ckStringOf(jsonResponse,"totalBytesRewritten")
    objectSize.s = CkJsonObject::ckStringOf(jsonResponse,"objectSize")
    done.i = CkJsonObject::ckBoolOf(jsonResponse,"done")
    resourceKind.s = CkJsonObject::ckStringOf(jsonResponse,"resource.kind")
    resourceId.s = CkJsonObject::ckStringOf(jsonResponse,"resource.id")
    resourceSelfLink.s = CkJsonObject::ckStringOf(jsonResponse,"resource.selfLink")
    resourceName.s = CkJsonObject::ckStringOf(jsonResponse,"resource.name")
    resourceBucket.s = CkJsonObject::ckStringOf(jsonResponse,"resource.bucket")
    resourceGeneration.s = CkJsonObject::ckStringOf(jsonResponse,"resource.generation")
    resourceMetageneration.s = CkJsonObject::ckStringOf(jsonResponse,"resource.metageneration")
    resourceContentType.s = CkJsonObject::ckStringOf(jsonResponse,"resource.contentType")
    resourceTimeCreated.s = CkJsonObject::ckStringOf(jsonResponse,"resource.timeCreated")
    resourceUpdated.s = CkJsonObject::ckStringOf(jsonResponse,"resource.updated")
    resourceStorageClass.s = CkJsonObject::ckStringOf(jsonResponse,"resource.storageClass")
    resourceTimeStorageClassUpdated.s = CkJsonObject::ckStringOf(jsonResponse,"resource.timeStorageClassUpdated")
    resourceSize.s = CkJsonObject::ckStringOf(jsonResponse,"resource.size")
    resourceMd5Hash.s = CkJsonObject::ckStringOf(jsonResponse,"resource.md5Hash")
    resourceMediaLink.s = CkJsonObject::ckStringOf(jsonResponse,"resource.mediaLink")
    resourceCrc32c.s = CkJsonObject::ckStringOf(jsonResponse,"resource.crc32c")
    resourceEtag.s = CkJsonObject::ckStringOf(jsonResponse,"resource.etag")


    CkRest::ckDispose(rest)
    CkStringBuilder::ckDispose(sbResponseBody)
    CkJsonObject::ckDispose(jsonResponse)


    ProcedureReturn
EndProcedure

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="
  }
}