Access Amazon S3 public bucket - amazon-web-services

Question

Hello I am trying to download data from one of an Amazon S3 public bucket.
For example https://registry.opendata.aws/noaa-gfs-bdp-pds/
The bucket has web accessible folder and I want to download the files inside the bucket.
I know I can do this with AWS CLI tool
But I want to know if there anyway to do this with AWs SDK Api (s3 client) (c# visual studio)?
I think the issue is authentication when creating connection to s3 client it requires credentials like access key ,I don't have an AWS account,and the bucket I try to get to is public so
Does anyone know how to access to this public bucket without any credentials via API?
Thanks.

Answer 1

If you specify the AnonymousAWSCredentials as the credentials object, any requests that are made to S3 will be unsigned. After that, interacting with the bucket is done like any other call:
using Amazon.Runtime;
using Amazon.S3;
using Amazon.S3.Model;
using System;
namespace S3TestApp
{
class Program
{
static void Main(string[] args)
{
var unsigned = new AnonymousAWSCredentials();
var client = new AmazonS3Client(unsigned, Amazon.RegionEndpoint.USEast1);
var listRequest = new ListObjectsRequest
{
BucketName = "noaa-gfs-bdp-pds",
Delimiter = "/",
};
ListObjectsResponse listResponse;
do
{
listResponse = client.ListObjects(listRequest);
foreach (var obj in listResponse.CommonPrefixes)
{
Console.WriteLine("PRE {0}", obj);
}
foreach (var obj in listResponse.S3Objects)
{
Console.WriteLine("{0} {1}", obj.Size, obj.Key);
}
listRequest.Marker = listResponse.NextMarker;
} while (listResponse.IsTruncated);
}
}
}