Objective-C 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"

Objective-C Example

#import <CkoRest.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <NSString.h>

CkoRest *rest = [[CkoRest alloc] init];
BOOL success;

//  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
BOOL bTls = YES;
int port = 443;
BOOL bAutoReconnect = YES;
success = [rest Connect: @"www.googleapis.com" port: [NSNumber numberWithInt: port] tls: bTls autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@%d",@"ConnectFailReason: ",[rest.ConnectFailReason intValue]);
    NSLog(@"%@",rest.LastErrorText);
    return;
}

[rest AddHeader: @"Authorization" value: @"Bearer CLOUD_STORAGE_TOKEN"];

CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
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 != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

int respStatusCode = [rest.ResponseStatusCode intValue];
if (respStatusCode >= 400) {
    NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",rest.ResponseHeader);
    NSLog(@"%@",@"Response Body:");
    NSLog(@"%@",[sbResponseBody GetAsString]);
    return;
}

CkoJsonObject *jsonResponse = [[CkoJsonObject alloc] init];
[jsonResponse LoadSb: sbResponseBody];

//  See the Online Tool for Generating JSON Parse Code

NSString *kind = [jsonResponse StringOf: @"kind"];
NSString *totalBytesRewritten = [jsonResponse StringOf: @"totalBytesRewritten"];
NSString *objectSize = [jsonResponse StringOf: @"objectSize"];
BOOL done = [jsonResponse BoolOf: @"done"];
NSString *resourceKind = [jsonResponse StringOf: @"resource.kind"];
NSString *resourceId = [jsonResponse StringOf: @"resource.id"];
NSString *resourceSelfLink = [jsonResponse StringOf: @"resource.selfLink"];
NSString *resourceName = [jsonResponse StringOf: @"resource.name"];
NSString *resourceBucket = [jsonResponse StringOf: @"resource.bucket"];
NSString *resourceGeneration = [jsonResponse StringOf: @"resource.generation"];
NSString *resourceMetageneration = [jsonResponse StringOf: @"resource.metageneration"];
NSString *resourceContentType = [jsonResponse StringOf: @"resource.contentType"];
NSString *resourceTimeCreated = [jsonResponse StringOf: @"resource.timeCreated"];
NSString *resourceUpdated = [jsonResponse StringOf: @"resource.updated"];
NSString *resourceStorageClass = [jsonResponse StringOf: @"resource.storageClass"];
NSString *resourceTimeStorageClassUpdated = [jsonResponse StringOf: @"resource.timeStorageClassUpdated"];
NSString *resourceSize = [jsonResponse StringOf: @"resource.size"];
NSString *resourceMd5Hash = [jsonResponse StringOf: @"resource.md5Hash"];
NSString *resourceMediaLink = [jsonResponse StringOf: @"resource.mediaLink"];
NSString *resourceCrc32c = [jsonResponse StringOf: @"resource.crc32c"];
NSString *resourceEtag = [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="
  }
}