(Objective-C) Upload Filename with SPACE Chars to Google Cloud Storage

Demonstrates how to upload a file with SPACE chars in the name to Google Cloud Storage.

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#import <CkoStringBuilder.h>
#import <CkoHttp.h>
#import <CkoHttpRequest.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];
http.AuthToken = [sbToken GetAsString];

// Use %20 for the SPACE chars in the path.
CkoStringBuilder *sbPath = [[CkoStringBuilder alloc] init];
[sbPath Append: @"/upload/storage/v1/b/bucket_name/o?uploadType=media&name=file%20with%20space%20char.jpg"];
int numReplaced = [[sbPath Replace: @"bucket_name" replacement: @"chilkat-ocean"] intValue];

CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
req.HttpVerb = @"POST";
req.Path = [sbPath GetAsString];
req.ContentType = @"image/jpeg";
// Indicate the file to be streamed in the request body when the HTTP POST is sent.
// Use SPACE chars directly in the local file path.
[req StreamBodyFromFile: @"qa_data/jpg/file with space char.jpg"];

CkoHttpResponse *resp = [http SynchronousRequest: @"www.googleapis.com" port: [NSNumber numberWithInt: 443] ssl: YES req: req];
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/file with space char.jpg/1502643657837855",
//  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/file with space char.jpg",
//  "name": "file with space char.jpg",
//  "bucket": "chilkat-ocean",
//  "generation": "1502643657837855",
//  "metageneration": "1",
//  "contentType": "image/jpeg",
//  "timeCreated": "2017-08-13T17:00:57.811Z",
//  "updated": "2017-08-13T17:00:57.811Z",
//  "storageClass": "MULTI_REGIONAL",
//  "timeStorageClassUpdated": "2017-08-13T17:00:57.811Z",
//  "size": "777835",
//  "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
//  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/file with space char.jpg?generation=1502643657837855&alt=media",
//  "crc32c": "ixxYVw==",
//  "etag": "CJ+azOvX1NUCEAE="
// }