Swift 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"

Swift Example

func chilkatTest() {
    let rest = CkoRest()
    var success: Bool

    //  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
    var bTls: Bool = true
    var port: Int = 443
    var bAutoReconnect: Bool = true
    success = rest.Connect("www.googleapis.com", port: port, tls: bTls, autoReconnect: bAutoReconnect)
    if success != true {
        print("ConnectFailReason: \(rest.ConnectFailReason.intValue)")
        print("\(rest.LastErrorText)")
        return
    }

    rest.AddHeader("Authorization", value: "Bearer CLOUD_STORAGE_TOKEN")

    let sbResponseBody = CkoStringBuilder()
    success = rest.FullRequestNoBodySb("POST", uriPath: "/storage/v1/b/chilkat-bucket/o/starfish.jpg/rewriteTo/b/chilkat-images/o/starfish.jpg?project=MY_CLOUD_STORAGE_PROJECT", sb: sbResponseBody)
    if success != true {
        print("\(rest.LastErrorText)")
        return
    }

    var respStatusCode: Int = rest.ResponseStatusCode.intValue
    if respStatusCode >= 400 {
        print("Response Status Code = \(respStatusCode)")
        print("Response Header:")
        print("\(rest.ResponseHeader)")
        print("Response Body:")
        print("\(sbResponseBody.GetAsString())")
        return
    }

    let jsonResponse = CkoJsonObject()
    jsonResponse.LoadSb(sbResponseBody)

    //  See the Online Tool for Generating JSON Parse Code

    var kind: String? = jsonResponse.StringOf("kind")
    var totalBytesRewritten: String? = jsonResponse.StringOf("totalBytesRewritten")
    var objectSize: String? = jsonResponse.StringOf("objectSize")
    var done: Bool = jsonResponse.BoolOf("done")
    var resourceKind: String? = jsonResponse.StringOf("resource.kind")
    var resourceId: String? = jsonResponse.StringOf("resource.id")
    var resourceSelfLink: String? = jsonResponse.StringOf("resource.selfLink")
    var resourceName: String? = jsonResponse.StringOf("resource.name")
    var resourceBucket: String? = jsonResponse.StringOf("resource.bucket")
    var resourceGeneration: String? = jsonResponse.StringOf("resource.generation")
    var resourceMetageneration: String? = jsonResponse.StringOf("resource.metageneration")
    var resourceContentType: String? = jsonResponse.StringOf("resource.contentType")
    var resourceTimeCreated: String? = jsonResponse.StringOf("resource.timeCreated")
    var resourceUpdated: String? = jsonResponse.StringOf("resource.updated")
    var resourceStorageClass: String? = jsonResponse.StringOf("resource.storageClass")
    var resourceTimeStorageClassUpdated: String? = jsonResponse.StringOf("resource.timeStorageClassUpdated")
    var resourceSize: String? = jsonResponse.StringOf("resource.size")
    var resourceMd5Hash: String? = jsonResponse.StringOf("resource.md5Hash")
    var resourceMediaLink: String? = jsonResponse.StringOf("resource.mediaLink")
    var resourceCrc32c: String? = jsonResponse.StringOf("resource.crc32c")
    var resourceEtag: String? = jsonResponse.StringOf("resource.etag")

}

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="
  }
}