AWS S3 iOS SDK upload file helper

AWSHelpers.swift

/*
Created by Georg Romas on 14/04/16.

Convenient class method to upload local file to AWS S3 bucket

Example usage:

AWSS3TransferManager.uploadFile(
                    url,
                    bucketName: "storage",
                    destinationFileName: "images/client/reviews/\(NSUUID().UUIDString).jpg",
                    contentType: "image/jpeg",
                    completeCallback: { [unowned self] (task) -> AnyObject? in
                        
                        if let error = task.error {
                            log.error("s3 upload error: \(error)")
                            
                            // Notify user about error
                            
                            return nil
                        }
                        
                        if let result = task.result as? AWSS3TransferManagerUploadOutput {
                            let cloudFronUrl = "https://XXXXXXXX.cloudfront.net/\(fileName)"
                            log.info("s3 upload success: \(result) | cloudfront url should be \(cloudFronUrl)")
                            
                            // Save cloudFronUrl as new file path
                        }
                        
                        return nil
                })

*/

import Foundation
import AWSS3

extension AWSS3TransferManager {
    class func uploadFile(
        localFileUrl: NSURL,
        bucketName: String,
        destinationFileName: String,
        contentType: String,
        completeCallback: ((AWSTask) -> AnyObject?)
        ) {
        
        let transferManager = AWSS3TransferManager.defaultS3TransferManager()
        
        let uploadRequest = AWSS3TransferManagerUploadRequest()
        uploadRequest.bucket = bucketName
        uploadRequest.key = destinationFileName
        uploadRequest.body = localFileUrl
        uploadRequest.contentType = contentType
        uploadRequest.contentEncoding = nil
        
        transferManager
            .upload(uploadRequest)
            .continueWithExecutor(AWSExecutor.mainThreadExecutor(), withBlock: completeCallback)
    }
}