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add support for pagination in list objects calls #18

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merged 1 commit into from
Aug 12, 2023
Merged

add support for pagination in list objects calls #18

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95 changes: 70 additions & 25 deletions FileSystem.Adapters.AmazonS3/src/AmazonS3Adapter.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -76,20 +76,27 @@ public override async Task<IDirectory> GetDirectoryAsync(string virtualPath, Can
}

var request = new ListObjectsV2Request {BucketName = bucketName, Prefix = path};
var response = await client.ListObjectsV2Async(request, cancellationToken);
ListObjectsV2Response response;

if (response.KeyCount == 0)
do
{
throw new DirectoryNotFoundException(path, Prefix);
}
response = await client.ListObjectsV2Async(request, cancellationToken);

foreach (var item in response.S3Objects)
{
if (item.Key == path)
if (response.KeyCount == 0)
{
return ModelFactory.CreateDirectory(item, virtualPath);
throw new DirectoryNotFoundException(path, Prefix);
}

foreach (var item in response.S3Objects)
{
if (item.Key == path)
{
return ModelFactory.CreateDirectory(item, virtualPath);
}
}
}

request.ContinuationToken = response.NextContinuationToken;
} while (response.IsTruncated);

throw new DirectoryNotFoundException(path, Prefix);
}
Expand All @@ -109,22 +116,35 @@ public override async Task<IEnumerable<IFile>> GetFilesAsync(string virtualPath
path += "/";
}

if (path == "/")
{
path = "";
}

try
{
var request = new ListObjectsV2Request {BucketName = bucketName, Prefix = path};
var response = await client.ListObjectsV2Async(request, cancellationToken);
ListObjectsV2Response response;

var files = new List<IFile>();

foreach (var item in response.S3Objects)
do
{
var itemName = item.Key.Substring(0, item.Key.Length - path.Length);
response = await client.ListObjectsV2Async(request, cancellationToken);

if (!item.Key.EndsWith("/") && !itemName.Contains('/'))
foreach (var item in response.S3Objects)
{
files.Add(ModelFactory.CreateFile(item, GetVirtualPath(item.Key)));
// var itemName = item.Key.Substring(0, item.Key.Length - path.Length);
var itemName = item.Key.Substring(path.Length).RemoveLeadingForwardSlash();

if (!item.Key.EndsWith("/") && !itemName.Contains('/'))
{
files.Add(ModelFactory.CreateFile(item, GetVirtualPath(item.Key)));
}
}
}

request.ContinuationToken = response.NextContinuationToken;
} while (response.IsTruncated);

return files;
}
Expand All @@ -139,22 +159,39 @@ public override async Task<IEnumerable<IDirectory>> GetDirectoriesAsync(string v
await GetDirectoryAsync(virtualPath, cancellationToken);
var path = GetPath(virtualPath);

if (!path.EndsWith("/"))
{
path += "/";
}

if (path == "/")
{
path = "";
}

try
{
var request = new ListObjectsV2Request {BucketName = bucketName, Prefix = path};
var response = await client.ListObjectsV2Async(request, cancellationToken);
ListObjectsV2Response response;

var directories = new List<IDirectory>();

foreach (var item in response.S3Objects)
do
{
var itemName = item.Key.Substring(path.Length).RemoveLeadingForwardSlash();
response = await client.ListObjectsV2Async(request, cancellationToken);

if (item.Key.EndsWith("/") && itemName.Count(c => c.Equals('/')) == 1)
foreach (var item in response.S3Objects)
{
directories.Add(ModelFactory.CreateDirectory(item, GetVirtualPath(item.Key)));
var itemName = item.Key.Substring(path.Length).RemoveLeadingForwardSlash();

if (item.Key.EndsWith("/") && itemName.Count(c => c.Equals('/')) == 1)
{
directories.Add(ModelFactory.CreateDirectory(item, GetVirtualPath(item.Key)));
}
}
}

request.ContinuationToken = response.NextContinuationToken;
} while (response.IsTruncated);

return directories;
}
Expand Down Expand Up @@ -197,12 +234,20 @@ public override async Task DeleteDirectoryAsync(string virtualPath, Cancellation
var deleteObjectsRequest = new DeleteObjectsRequest {BucketName = bucketName};
var listObjectsRequest = new ListObjectsV2Request {BucketName = bucketName, Prefix = path};

var response = await client.ListObjectsV2Async(listObjectsRequest, cancellationToken);
ListObjectsV2Response response;

foreach (S3Object entry in response.S3Objects)
do
{
deleteObjectsRequest.AddKey(entry.Key);
}
response = await client.ListObjectsV2Async(listObjectsRequest, cancellationToken);

foreach (S3Object entry in response.S3Objects)
{
deleteObjectsRequest.AddKey(entry.Key);
}

listObjectsRequest.ContinuationToken = response.NextContinuationToken;
} while (response.IsTruncated);


await client.DeleteObjectsAsync(deleteObjectsRequest, cancellationToken);
}
Expand Down
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