(Objective-C) S3 Download Specific Version of File

Demonstrates how to download a file from the Amazon S3 service using the versionId query parameter.

Note: This example requires Chilkat v9.5.0.89 or later. (A problem regarding AwsSubResources w/ downloads was fixed shortly after the v9.5.0.88 release.)

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoHttp.h>
#import <NSString.h>

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

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

http.AwsAccessKey = @"AWS_ACCESS_KEY";
http.AwsSecretKey = @"AWS_SECRET_KEY";
http.S3Ssl = YES;
http.AwsRegion = @"us-east-1";
http.AwsEndpoint = @"s3.amazonaws.com";
http.AwsSubResources = @"versionId=x8UPzRsgskmbe55lEQvhLi25PQl2lcFH";

NSString *bucketName = @"chilkat100";
NSString *objectName = @"frenchUtf8.txt";
NSString *localFilePath = @"qa_output/frenchUtf8.txt";

BOOL success = [http S3_DownloadFile: bucketName objectName: objectName localFilePath: localFilePath];

if (success != YES) {
    NSLog(@"%@",http.LastErrorText);
}
else {
    NSLog(@"%@",@"File downloaded.");
}