Returning ENOTCONN Error - ios

Question

Im trying to upload image to Aws S3 bucket. I tried to follow a tutorial and I'm getting a error saying "Returning ENOTCONN because protocol has not yet been set up." I'm new to swift and I'm not able to understand why the error is occurring also.My code for S3 upload is as follows:
let uploadRequest = AWSS3TransferManagerUploadRequest()
uploadRequest?.body = url!
uploadRequest?.key = remoteFileName
uploadRequest?.bucket = S3BucketName
uploadRequest?.contentType = "image/" + ext
let transferManager = AWSS3TransferManager.default()
// Perform Upload
transferManager.upload(uploadRequest!).continueWith(block: { (task:AWSTask<AnyObject>) -> AnyObject! in
if let error = task.error{
print("error \(error.localizedDescription)")
}
if task.result != nil {
let url = AWSS3.default().configuration.endpoint.url
let publicURL = url?.appendingPathComponent((uploadRequest?.bucket!)!).appendingPathComponent((uploadRequest?.key!)!)
print("Uploaded to:\(publicURL)")
}
return nil
})
My S3 is in ap-south-1 and cognito pool id in us-west-2. I guess thats creating the problem.Is there a way to fix the issue without creating another bucket in us-west-2.
I get the following error:

Answer 1

You want the bucket policy to be somewhat like this if the cognito pool is not set up for authentication: Notice Principal and Action values
Also, is there any particular reason you're using AWSS3TransferManagerUploadRequest? If the policy doesn't resolve your issue, you can use the following code for AWSS3TransferUtilityUploadExpression which sends your data in chunks asynchronously.
let expression = AWSS3TransferUtilityUploadExpression()
expression.progressBlock = progressBlock
transferUtility.uploadData(UIImagePNGRepresentation(imageNew!)!,
bucket: "bucket-name",
key: (imgName.removeWhitespace()),
contentType: "image/png",
expression: expression,
completionHandler: completionHandler).continueWith { (task) -> AnyObject! in
if let error = task.error {
print("Error: \(error.localizedDescription)")
}
if let _ = task.result {
print("Upload Starting!")
// Do something with uploadTask.
}
return nil;
}