(Objective-C) Upload In-Memory Binary Data to Google Cloud Storage

Demonstrates how to upload in-memory binary data to Google Cloud Storage.

Note: This example requires Chilkat v9.5.0.69 or later because it uses the http.PBinaryBd method.

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#import <CkoStringBuilder.h>
#import <CkoHttp.h>
#import <NSString.h>
#import <CkoBinData.h>
#import <CkoHttpResponse.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example uses a previously obtained access token having permission for the 
// scope "https://www.googleapis.com/auth/cloud-platform"

// In this example, Get Google Cloud Storage OAuth2 Access Token, 
// the service account access token was saved to a text file.  This example fetches the access token from the file..
CkoStringBuilder *sbToken = [[CkoStringBuilder alloc] init];
[sbToken LoadFile: @"qa_data/tokens/googleCloudStorageAccessToken.txt" charset: @"utf-8"];

// Send a POST equivalent to this curl command.
// The content of the file is contained in the request body.

// curl -X POST --data-binary @[OBJECT] \
//     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
//     -H "Content-Type: [OBJECT_CONTENT_TYPE]" \
//     "https://www.googleapis.com/upload/storage/v1/b/[BUCKET_NAME]/o?uploadType=media&name=[OBJECT_NAME]"

CkoHttp *http = [[CkoHttp alloc] init];

// Download a JPG image from the Internet, and then upload this JPG to
// a Google Storage bucket.
NSString *jpgUrl = @"https://www.chilkatsoft.com/images/starfish.jpg";

CkoBinData *jpgData = [[CkoBinData alloc] init];
BOOL success = [http DownloadBd: jpgUrl binData: jpgData];
if (success != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

http.AuthToken = [sbToken GetAsString];

// Construct a URL to upload to an object named "starfish.jpg" in the "chilkat-ocean" bucket.
[http SetUrlVar: @"bucket_name" value: @"chilkat-ocean"];
[http SetUrlVar: @"object_name" value: @"starfish.jpg"];
NSString *url = @"https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}";

// Note: The PBinaryBd method first appears in Chilkat v9.5.0.69
CkoHttpResponse *resp = [http PBinaryBd: @"POST" url: url data: jpgData contentType: @"image/jpeg" md5: NO gzip: NO];
if (http.LastMethodSuccess == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

int responseCode = [resp.StatusCode intValue];
if (responseCode == 401) {
    NSLog(@"%@",resp.BodyStr);
    NSLog(@"%@",@"If invalid credentials, then it is likely the access token expired.");
    NSLog(@"%@",@"Your app should automatically fetch a new access token and re-try.");

    return;
}

NSLog(@"%@%d",@"Response code: ",responseCode);
NSLog(@"%@",@"Response body");
NSLog(@"%@",resp.BodyStr);

// A successful response looks like this:
// Response code: 200
// Response body
// {
//  "kind": "storage#object",
//  "id": "chilkat-ocean/starfish.jpg/1502670320090292",
//  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
//  "name": "starfish.jpg",
//  "bucket": "chilkat-ocean",
//  "generation": "1502670320090292",
//  "metageneration": "1",
//  "contentType": "image/jpeg",
//  "timeCreated": "2017-08-14T00:25:20.040Z",
//  "updated": "2017-08-14T00:25:20.040Z",
//  "storageClass": "MULTI_REGIONAL",
//  "timeStorageClassUpdated": "2017-08-14T00:25:20.040Z",
//  "size": "6229",
//  "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
//  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1502670320090292&alt=media",
//  "crc32c": "9RjgwQ==",
//  "etag": "CLT5kpW71dUCEAE="
// }