Well, for future reference, here's what I ended up with that seems to be working
string accessKeyID = "ACCESKEYID";
string secretAccessKey = "SECRETACCESSKEY";
using (client = Amazon.AWSClientFactory.CreateAmazonS3Client(accessKeyID, secretAccessKey))
{
try
{
//First, get a list of all objects in the bucket. We need to go through them one at a time.
ListObjectsRequest listobjectsrequest = new ListObjectsRequest();
listobjectsrequest = new ListObjectsRequest();
listobjectsrequest.BucketName = "mybucketname";
ListObjectsResponse listobjectresponse = client.ListObjects(listobjectsrequest);
// Process each item
foreach (S3Object entry in listobjectresponse.S3Objects)
{
//Get the object so we can look at the headers to see if it already has a cache control header
GetObjectRequest getobjectrequest = new GetObjectRequest
{
BucketName = listobjectsrequest.BucketName,
Key = entry.Key,
};
GetObjectResponse object1 = client.GetObject(getobjectrequest);
string cacheControl1 = object1.Headers["Cache-Control"] ?? "none";
//If no cache control header, then COPY the object to ITSELF but add the headers that we need
if (cacheControl1 != "none")
{
CopyObjectRequest copyobjectrequest = new CopyObjectRequest
{
SourceBucket = listobjectsrequest.BucketName,
SourceKey = entry.Key,
DestinationBucket = listobjectsrequest.BucketName,
DestinationKey = entry.Key,
Directive = S3MetadataDirective.REPLACE, //Required if we will overwrite headers
CannedACL = S3CannedACL.PublicRead //Need to set to public so it can be read
};
copyobjectrequest.AddHeader("Cache-Control", "max-age=31536000,public");
CopyObjectResponse copyobjectresponse = client.CopyObject(copyobjectrequest);
}
}
}
catch (AmazonS3Exception amazonS3Exception)
{
Console.WriteLine(amazonS3Exception.Message, amazonS3Exception.InnerException);
}
}
CopyObjectRequest. You may also have to write your own recursion.