How to store and retrieve files and data from AWS using Transfer-manager
Both the Amazon S3 TransferManager and TransferUtitliy classes make it easy for you to upload and download files from Amazon S3 while optimizing for performance and reliability. Both hide the complexity of making asynchronous file transfers behind simple APIs
OBJECTIVE-C
#import <AWSS3/AWSS3.h>
AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
Download
NSString *downloadingFilePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"myImage.jpg"];
NSURL *downloadingFileURL = [NSURL fileURLWithPath:downloadingFilePath];
AWSS3TransferManagerDownloadRequest *downloadRequest = [AWSS3TransferManagerDownloadRequest new];
downloadRequest.bucket = @"myBucket";
downloadRequest.key = @"myImage.jpg";
downloadRequest.downloadingFileURL = downloadingFileURL;
[[transferManager download:downloadRequest ] continueWithExecutor:[AWSExecutor mainThreadExecutor]
withBlock:^id(AWSTask *task) {
if (task.error){
if ([task.error.domain isEqualToString:AWSS3TransferManagerErrorDomain]) {
switch (task.error.code) {
case AWSS3TransferManagerErrorCancelled:
case AWSS3TransferManagerErrorPaused:
break;
default:
NSLog(@"Error: %@", task.error);
break;
}
} else {
NSLog(@"Error: %@", task.error);
}
}
if (task.result) {
AWSS3TransferManagerDownloadOutput *downloadOutput = task.result;
}
return nil;
}];
Upload
NSURL *uploadingFileURL = [NSURL fileURLWithPath: @"your/file/path/myTestFile.txt"];
AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
uploadRequest.bucket = @"myBucket";
uploadRequest.key = @"myTestFile.txt";
uploadRequest.body = uploadingFileURL;
[[transferManager upload:uploadRequest] continueWithExecutor:[AWSExecutor mainThreadExecutor]
withBlock:^id(AWSTask *task) {
if (task.error) {
if ([task.error.domain isEqualToString:AWSS3TransferManagerErrorDomain]) {
switch (task.error.code) {
case AWSS3TransferManagerErrorCancelled:
case AWSS3TransferManagerErrorPaused:
break;
default:
NSLog(@"Error: %@", task.error);
break;
}
} else {
// Unknown error.
NSLog(@"Error: %@", task.error);
}
}
if (task.result) {
AWSS3TransferManagerUploadOutput *uploadOutput = task.result;
// The file uploaded successfully.
}
return nil;
}];
Displaying a Downloaded Image in an UIImageView
self.imageView.image = [UIImage imageWithContentsOfFile:downloadingFilePath];
=========================================
SWIFT
import AWSS3
let transferManager = AWSS3TransferManager.default()
Download
let downloadingFileURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("myImage.jpg")
let downloadRequest = AWSS3TransferManagerDownloadRequest()
downloadRequest.bucket = "myBucket"
downloadRequest.key = "myImage.jpg"
downloadRequest.downloadingFileURL = downloadingFileURL
transferManager.download(downloadRequest).continueWith(executor: AWSExecutor.mainThread(), block: { (task:AWSTask) -> Any? in
if let error = task.error as? NSError {
if error.domain == AWSS3TransferManagerErrorDomain, let code = AWSS3TransferManagerErrorType(rawValue: error.code) {
switch code {
case .cancelled, .paused:
break
default:
print("Error downloading: \(downloadRequest.key) Error: \(error)")
}
} else {
print("Error downloading: \(downloadRequest.key) Error: \(error)")
}
return nil
}
print("Download complete for: \(downloadRequest.key)")
let downloadOutput = task.result
return nil
})
Upload
let uploadingFileURL = URL(fileURLWithPath: "your/file/path/myTestFile.txt")
let uploadRequest = AWSS3TransferManagerUploadRequest()
uploadRequest.bucket = "myBucket"
uploadRequest.key = "myTestFile.txt"
uploadRequest.body = uploadingFileURL
transferManager.upload(uploadRequest).continueWith(executor: AWSExecutor.mainThread(), block: { (task:AWSTask) -> Any? in
if let error = task.error as? NSError {
if error.domain == AWSS3TransferManagerErrorDomain, let code = AWSS3TransferManagerErrorType(rawValue: error.code) {
switch code {
case .cancelled, .paused:
break
default:
print("Error uploading: \(uploadRequest.key) Error: \(error)")
}
} else {
print("Error uploading: \(uploadRequest.key) Error: \(error)")
}
return nil
}
let uploadOutput = task.result
print("Upload complete for: \(uploadRequest.key)")
return nil
})
Displaying a Downloaded Image in an UIImageView
self.imageView.image = UIImage(contentsOfFile: downloadingFileURL.path)
