public Yield GetFileOrFolderListing(DreamContext context, DreamMessage request, Result <DreamMessage> response)
{
var head = "HEAD".EqualsInvariant(context.Verb);
var path = GetPath(context);
var data = _s3Client.GetDataInfo(path, head);
DreamMessage result;
if (data == null)
{
response.Return(DreamMessage.NotFound("no such file or folder"));
yield break;
}
if (data.IsDirectory)
{
// Note (arnec): HEAD for a directory doesn't really mean anything, so we just return ok, to indicate that it exists
result = head ? DreamMessage.Ok() : DreamMessage.Ok(data.AsDirectoryDocument());
}
else
{
// dealing with a file request
var filehandle = data.AsFileHandle();
// check if request contains a 'if-modified-since' header
if (request.CheckCacheRevalidation(filehandle.Modified) && (filehandle.Modified.Year >= 1900))
{
response.Return(DreamMessage.NotModified());
yield break;
}
result = head
? new DreamMessage(DreamStatus.Ok, null, filehandle.MimeType, filehandle.Size, Stream.Null)
: DreamMessage.Ok(filehandle.MimeType, filehandle.Size, filehandle.Stream);
// add caching headers if file was found
if (!head && result.IsSuccessful)
{
// add caching information; this will avoid unnecessary data transfers by user-agents with caches
result.SetCacheMustRevalidate(filehandle.Modified);
}
}
response.Return(result);
yield break;
}
public AmazonS3DataInfo GetDataInfo(string path, bool head)
{
return(Client.GetDataInfo(path, head));
}