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"

C++ Example

#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkRest rest;
    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 = true;
    int port = 443;
    bool bAutoReconnect = true;
    success = rest.Connect("www.googleapis.com",port,bTls,bAutoReconnect);
    if (success != true) {
        std::cout << "ConnectFailReason: " << rest.get_ConnectFailReason() << "\r\n";
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    rest.AddHeader("Authorization","Bearer CLOUD_STORAGE_TOKEN");

    CkStringBuilder sbResponseBody;
    success = rest.FullRequestNoBodySb("POST","/storage/v1/b/chilkat-bucket/o/starfish.jpg/rewriteTo/b/chilkat-images/o/starfish.jpg?project=MY_CLOUD_STORAGE_PROJECT",sbResponseBody);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    int respStatusCode = rest.get_ResponseStatusCode();
    if (respStatusCode >= 400) {
        std::cout << "Response Status Code = " << respStatusCode << "\r\n";
        std::cout << "Response Header:" << "\r\n";
        std::cout << rest.responseHeader() << "\r\n";
        std::cout << "Response Body:" << "\r\n";
        std::cout << sbResponseBody.getAsString() << "\r\n";
        return;
    }

    CkJsonObject jsonResponse;
    jsonResponse.LoadSb(sbResponseBody);

    //  See the Online Tool for Generating JSON Parse Code

    const char *kind = jsonResponse.stringOf("kind");
    const char *totalBytesRewritten = jsonResponse.stringOf("totalBytesRewritten");
    const char *objectSize = jsonResponse.stringOf("objectSize");
    bool done = jsonResponse.BoolOf("done");
    const char *resourceKind = jsonResponse.stringOf("resource.kind");
    const char *resourceId = jsonResponse.stringOf("resource.id");
    const char *resourceSelfLink = jsonResponse.stringOf("resource.selfLink");
    const char *resourceName = jsonResponse.stringOf("resource.name");
    const char *resourceBucket = jsonResponse.stringOf("resource.bucket");
    const char *resourceGeneration = jsonResponse.stringOf("resource.generation");
    const char *resourceMetageneration = jsonResponse.stringOf("resource.metageneration");
    const char *resourceContentType = jsonResponse.stringOf("resource.contentType");
    const char *resourceTimeCreated = jsonResponse.stringOf("resource.timeCreated");
    const char *resourceUpdated = jsonResponse.stringOf("resource.updated");
    const char *resourceStorageClass = jsonResponse.stringOf("resource.storageClass");
    const char *resourceTimeStorageClassUpdated = jsonResponse.stringOf("resource.timeStorageClassUpdated");
    const char *resourceSize = jsonResponse.stringOf("resource.size");
    const char *resourceMd5Hash = jsonResponse.stringOf("resource.md5Hash");
    const char *resourceMediaLink = jsonResponse.stringOf("resource.mediaLink");
    const char *resourceCrc32c = jsonResponse.stringOf("resource.crc32c");
    const char *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="
  }
}