Objective-C

S3 List Bucket Objects (using Chilkat REST)

See more Amazon S3 (new) Examples

Demonstrates how to fetch a list of objects in an S3 bucket. Objective-C

#import <CkoRest.h>
#import <CkoAuthAws.h>
#import <CkoStringBuilder.h>
#import <CkoXml.h>
#import <NSString.h>

BOOL success = NO;

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

CkoRest *rest = [[CkoRest alloc] init];

// Connect to the Amazon AWS REST server.
BOOL bTls = YES;
int port = 443;
BOOL bAutoReconnect = YES;
success = [rest Connect: @"s3.amazonaws.com" port: [NSNumber numberWithInt: port] tls: bTls autoReconnect: bAutoReconnect];

// ----------------------------------------------------------------------------
// Important: For buckets created in regions outside us-east-1,
// there are three important changes that need to be made.
// See Working with S3 Buckets in Non-us-east-1 Regions for the details.
// ----------------------------------------------------------------------------

// Provide AWS credentials for the REST call.
CkoAuthAws *authAws = [[CkoAuthAws alloc] init];
authAws.AccessKey = @"AWS_ACCESS_KEY";
authAws.SecretKey = @"AWS_SECRET_KEY";
authAws.ServiceName = @"s3";
success = [rest SetAuthAws: authAws];

//  Set the bucket name via the HOST header.
//  In this case, the bucket name is "chilkat100".
rest.Host = @"chilkat100.s3.amazonaws.com";

CkoStringBuilder *sbResponse = [[CkoStringBuilder alloc] init];
success = [rest FullRequestNoBodySb: @"GET" uriPath: @"/" sb: sbResponse];
if (success == NO) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

int statusCode = [rest.ResponseStatusCode intValue];
NSLog(@"%@%d",@"Response status code = ",statusCode);

CkoXml *xml = [[CkoXml alloc] init];
[xml LoadSb: sbResponse autoTrim: YES];
NSLog(@"%@",[xml GetXml]);

if (statusCode != 200) {
    NSLog(@"%@",@"Failed.  See error information in the XML.");
    return;
}

// Use this online tool to generate code from sample XML: 
// Generate Code to Create XML

NSString *Key = 0;
NSString *LastModified = 0;
NSString *ETag = 0;
NSString *SizeDecimalStr = 0;
NSString *ID = 0;
NSString *DisplayName = 0;
NSString *StorageClass = 0;

NSString *Name = [xml GetChildContent: @"Name"];
int MaxKeys = [[xml GetChildIntValue: @"MaxKeys"] intValue];
NSString *IsTruncated = [xml GetChildContent: @"IsTruncated"];
int i = 0;
int count_i = [[xml NumChildrenHavingTag: @"Contents"] intValue];
while (i < count_i) {
    xml.I = [NSNumber numberWithInt: i];
    Key = [xml GetChildContent: @"Contents[i]|Key"];
    LastModified = [xml GetChildContent: @"Contents[i]|LastModified"];
    ETag = [xml GetChildContent: @"Contents[i]|ETag"];
    SizeDecimalStr = [xml GetChildContent: @"Contents[i]|Size"];
    ID = [xml GetChildContent: @"Contents[i]|Owner|ID"];
    DisplayName = [xml GetChildContent: @"Contents[i]|Owner|DisplayName"];
    StorageClass = [xml GetChildContent: @"Contents[i]|StorageClass"];
    i = i + 1;
}