Objective-C
Upload String to Google Cloud Storage

Demonstrates how to upload an in-memory string to Google Cloud Storage.
Chilkat Objective-C Downloads

Objective-C
#import <CkoStringBuilder.h>
#import <CkoHttp.h>
#import <CkoXml.h>
#import <NSString.h>
#import <CkoHttpResponse.h>

BOOL success = NO;

//  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];
http.AuthToken = [sbToken GetAsString];

//  Create an XML document, and write it to a StringBuilder.
//  We'll be uploading this XML document.
CkoXml *xml = [[CkoXml alloc] init];
xml.Tag = @"note";
[xml UpdateChildContent: @"to" value: @"Tove"];
[xml UpdateChildContent: @"from" value: @"Jani"];
[xml UpdateChildContent: @"heading" value: @"Reminder"];
[xml UpdateChildContent: @"body" value: @"Don't forget me this weekend!"];

//  Write the XML to sbXml.
CkoStringBuilder *sbXml = [[CkoStringBuilder alloc] init];
[xml GetXmlSb: sbXml];

//  sbXml contains this:

//  <note>
//      <to>Tove</to>
//      <from>Jani</from>
//      <heading>Reminder</heading>
//      <body>Don't forget me this weekend!</body>
//  </note>

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

CkoHttpResponse *resp = [[CkoHttpResponse alloc] init];
success = [http HttpSb: @"POST" url: url sb: sbXml charset: @"utf-8" contentType: @"application/xml" response: resp];
if (success == 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/test.xml/1502669565429870",
//   "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/test.xml",
//   "name": "test.xml",
//   "bucket": "chilkat-ocean",
//   "generation": "1502669565429870",
//   "metageneration": "1",
//   "contentType": "application/xml",
//   "timeCreated": "2017-08-14T00:12:45.379Z",
//   "updated": "2017-08-14T00:12:45.379Z",
//   "storageClass": "MULTI_REGIONAL",
//   "timeStorageClassUpdated": "2017-08-14T00:12:45.379Z",
//   "size": "181",
//   "md5Hash": "TCR0L7TWsw2TzOvfNvgEfA==",
//   "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/test.xml?generation=1502669565429870&alt=media",
//   "crc32c": "ZFd5sA==",
//   "etag": "CO6Qpq241dUCEAE="
//  }