Uploading Image to S3 fails to complete upload - ios

Question

I'm uploading an image to S3 and am having trouble completing the file transfer. Here is how the app acts.
Initiate uploadToS3()
File begins transfer sending bytes to server.
When around 600,000 bytes are sent, the upload halts.
After 20-40 seconds, the app continues its upload progress at 0%. It acts as if the file transfer never began in the first place.
During this entire time no errors appear in the logger.
In my view controller I have the following method that uploads the file.
func uploadToS3(){
// get the image from a UIImageView that is displaying the selected Image
var img: UIImage = imageView.image!
// create a local image that we can use to upload to s3
var path: NSString = NSTemporaryDirectory().stringByAppendingPathComponent("image.png")
var imageData: NSData = UIImagePNGRepresentation(img)
imageData.writeToFile(path as String, atomically: true)
// once the image is saved we can use the path to create a local fileurl
var url:NSURL = NSURL(fileURLWithPath: path as String)!
// next we set up the S3 upload request manager
let uploadRequest = AWSS3TransferManagerUploadRequest()
// set the bucket
uploadRequest?.bucket = "test-bucket"
// I want this image to be public to anyone to view it so I'm setting it to Public Read
uploadRequest?.ACL = AWSS3ObjectCannedACL.PublicRead
// set the image's name that will be used on the s3 server. I am also creating a folder to place the image in
uploadRequest?.key = "foldername/image.png"
// set the content type
uploadRequest?.contentType = "image/png"
// and finally set the body to the local file path
uploadRequest?.body = url;
// we will track progress through an AWSNetworkingUploadProgressBlock
uploadRequest?.uploadProgress = {[unowned self](bytesSent:Int64, totalBytesSent:Int64, totalBytesExpectedToSend:Int64) in
dispatch_sync(dispatch_get_main_queue(), { () -> Void in
println("total bytes sent")
println(totalBytesSent)
println("total bytes expected to send")
println(totalBytesExpectedToSend)
})
}
// now the upload request is set up we can creat the transfermanger, the credentials are already set up in the app delegate
var transferManager:AWSS3TransferManager = AWSS3TransferManager.defaultS3TransferManager()
// start the upload
transferManager.upload(uploadRequest).continueWithExecutor(BFExecutor.mainThreadExecutor(), withBlock:{ [unowned self]
task -> AnyObject in
// once the uploadmanager finishes check if there were any errors
if(task.error != nil){
println("%#", task.error);
}else{ // if there aren't any then the image is uploaded!
// this is the url of the image we just uploaded
println("https://s3.amazonaws.com/s3-demo-swift/foldername/image.png");
}
//self.removeLoadingView()
println("all done");
return ""
})
}
For anyone looking to recreate this app
Add to your Podfile:
pod 'AWSCore'
pod 'AWSS3'
pod 'AWSiOSSDKv2'
pod 'AWSCognitoSync'
Then add a bridge header containing:
#import <AWSCore/AWSCore.h>
#import <AWSS3/AWSS3.h>
In my AppDelegate I have:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
AWSCognitoCredentialsProvider.initialize()
var credentialsProvider = AWSCognitoCredentialsProvider(
regionType: AWSRegionType.USEast1,
identityPoolId: "identity pool id"
)
var configuration = AWSServiceConfiguration(
region: AWSRegionType.USEast1,
credentialsProvider: credentialsProvider
)
AWSServiceManager.defaultServiceManager().defaultServiceConfiguration = configuration
return true
}
Finally, in the view controller that contains uploadToS3(), add import AWSS3.
Update
Here is the last section of logged errors.
}]
2015-05-09 19:24:24.540 CoolApp[4492:55681] AWSiOSSDKv2 [Verbose] AWSURLResponseSerialization.m line:278 | -[AWSXMLResponseSerializer responseObjectForResponse:originalRequest:currentRequest:data:error:] | Response body: [<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>A03D405FC272808A</RequestId><HostId>bhSw+xQkGrMVd9QWMKMG1qYezPJet8b5L2ZIoGXePoftuupMP3HdgbAgCpStiLefo5yA3m1OJvY=</HostId></Error>]
(%#, Error Domain=com.amazonaws.AWSS3ErrorDomain Code=1 "The operation couldn’t be completed. (com.amazonaws.AWSS3ErrorDomain error 1.)" UserInfo=0x7c17cdc0 {HostId=bhSw+xQkGrMVd9QWMKMG1qYezPJet8b5L2ZIoGXePoftuupMP3HdgbAgCpStiLefo5yA3m1OJvY=, Code=AccessDenied, Message=Access Denied, RequestId=A03D405FC272808A})
all done
My question is, how do I fix this and have the image upload succesfully.

Answer 1

As the error message states, the permission is not set up correctly with your Amazon Cognito Identity pool. Understanding Amazon Cognito Authentication blog series (Part 2, Part 3) and Amazon Cognito Developer Guide are your great resources for understanding and setting up Cognito Identity.