/// <summary>
/// Tests the object's existence and returns metadata about existing objects.
/// </summary>
/// <param name="bucket">Bucket to test object in</param>
/// <param name="key">Key of object to stat</param>
/// <returns>Facts about the object</returns>
public ObjectStat StatObject(string bucket, string key)
{
var request = new RestRequest(bucket + "/" + UrlEncode(key), Method.HEAD);
var response = client.Execute(request);
if (response.StatusCode == HttpStatusCode.OK)
{
long size = 0;
DateTime lastModified = new DateTime();
string etag = "";
string contentType = null;
foreach (Parameter parameter in response.Headers)
{
if (parameter.Name == "Content-Length")
{
size = long.Parse(parameter.Value.ToString());
}
if (parameter.Name == "Last-Modified")
{
DateTime.Parse(parameter.Value.ToString());
}
if (parameter.Name == "ETag")
{
etag = parameter.Value.ToString().Replace("\"", "");
}
if (parameter.Name == "Content-Type")
{
contentType = parameter.Value.ToString();
}
}
return new ObjectStat(key, size, lastModified, etag, contentType);
}
ClientException ex = ParseError(response);
if (ex.GetType() == typeof(ObjectNotFoundException))
{
if (!this.BucketExists(bucket))
{
var bnfe = new BucketNotFoundException();
bnfe.Response = ex.Response;
throw bnfe;
}
}
throw ex;
}
private ClientException ParseError(IRestResponse response)
{
if (response == null)
{
return new ConnectionException();
}
if (HttpStatusCode.Redirect.Equals(response.StatusCode) || HttpStatusCode.TemporaryRedirect.Equals(response.StatusCode) || HttpStatusCode.MovedPermanently.Equals(response.StatusCode))
{
return new RedirectionException();
}
if (string.IsNullOrWhiteSpace(response.Content))
{
if (HttpStatusCode.Forbidden.Equals(response.StatusCode) || HttpStatusCode.NotFound.Equals(response.StatusCode) ||
HttpStatusCode.MethodNotAllowed.Equals(response.StatusCode) || HttpStatusCode.NotImplemented.Equals(response.StatusCode))
{
ClientException e = null;
ErrorResponse errorResponse = new ErrorResponse();
foreach (Parameter parameter in response.Headers)
{
if (parameter.Name.Equals("x-amz-id-2", StringComparison.CurrentCultureIgnoreCase))
{
errorResponse.HostID = parameter.Value.ToString();
}
if (parameter.Name.Equals("x-amz-request-id", StringComparison.CurrentCultureIgnoreCase))
{
errorResponse.RequestID = parameter.Value.ToString();
}
}
errorResponse.Resource = response.Request.Resource;
if (HttpStatusCode.NotFound.Equals(response.StatusCode))
{
int pathLength = response.Request.Resource.Split('/').Count();
if (pathLength > 1)
{
errorResponse.Code = "NoSuchKey";
e = new ObjectNotFoundException();
}
else if (pathLength == 1)
{
errorResponse.Code = "NoSuchBucket";
e = new BucketNotFoundException();
}
else
{
e = new InternalClientException("404 without body resulted in path with less than two components");
}
}
else if (HttpStatusCode.Forbidden.Equals(response.StatusCode))
{
errorResponse.Code = "Forbidden";
e = new AccessDeniedException();
}
else if (HttpStatusCode.MethodNotAllowed.Equals(response.StatusCode))
{
errorResponse.Code = "MethodNotAllowed";
e = new MethodNotAllowedException();
}
else
{
errorResponse.Code = "MethodNotAllowed";
e = new MethodNotAllowedException();
}
e.Response = errorResponse;
return e;
}
throw new InternalClientException("Unsuccessful response from server without XML error: " + response.StatusCode);
}
var contentBytes = System.Text.Encoding.UTF8.GetBytes(response.Content);
var stream = new MemoryStream(contentBytes);
ErrorResponse errResponse = (ErrorResponse)(new XmlSerializer(typeof(ErrorResponse)).Deserialize(stream));
string code = errResponse.Code;
ClientException clientException;
if ("NoSuchBucket".Equals(code)) clientException = new BucketNotFoundException();
else if ("NoSuchKey".Equals(code)) clientException = new ObjectNotFoundException();
else if ("InvalidBucketName".Equals(code)) clientException = new InvalidKeyNameException();
else if ("InvalidObjectName".Equals(code)) clientException = new InvalidKeyNameException();
else if ("AccessDenied".Equals(code)) clientException = new AccessDeniedException();
else if ("InvalidAccessKeyId".Equals(code)) clientException = new AccessDeniedException();
else if ("BucketAlreadyExists".Equals(code)) clientException = new BucketExistsException();
else if ("ObjectAlreadyExists".Equals(code)) clientException = new ObjectExistsException();
else if ("InternalError".Equals(code)) clientException = new InternalServerException();
else if ("KeyTooLong".Equals(code)) clientException = new InvalidKeyNameException();
else if ("TooManyBuckets".Equals(code)) clientException = new MaxBucketsReachedException();
else if ("PermanentRedirect".Equals(code)) clientException = new RedirectionException();
else if ("MethodNotAllowed".Equals(code)) clientException = new ObjectExistsException();
else if ("BucketAlreadyOwnedByYou".Equals(code)) clientException = new BucketExistsException();
else clientException = new InternalClientException(errResponse.ToString());
clientException.Response = errResponse;
clientException.XmlError = response.Content;
return clientException;
}
private ClientException ParseError(IRestResponse response)
{
if (response == null)
{
return new ConnectionException("Response is nil. Please report this issue https://github.com/minio/minio-dotnet/issues");
}
if (HttpStatusCode.Redirect.Equals(response.StatusCode) || HttpStatusCode.TemporaryRedirect.Equals(response.StatusCode) || HttpStatusCode.MovedPermanently.Equals(response.StatusCode))
{
return new RedirectionException("Redirection detected. Please report this issue https://github.com/minio/minio-dotnet/issues");
}
if (string.IsNullOrWhiteSpace(response.Content))
{
if (HttpStatusCode.Forbidden.Equals(response.StatusCode) || HttpStatusCode.NotFound.Equals(response.StatusCode) ||
HttpStatusCode.MethodNotAllowed.Equals(response.StatusCode) || HttpStatusCode.NotImplemented.Equals(response.StatusCode))
{
ClientException e = null;
ErrorResponse errorResponse = new ErrorResponse();
foreach (Parameter parameter in response.Headers)
{
if (parameter.Name.Equals("x-amz-id-2", StringComparison.CurrentCultureIgnoreCase))
{
errorResponse.HostId = parameter.Value.ToString();
}
if (parameter.Name.Equals("x-amz-request-id", StringComparison.CurrentCultureIgnoreCase))
{
errorResponse.RequestId = parameter.Value.ToString();
}
if (parameter.Name.Equals("x-amz-bucket-region", StringComparison.CurrentCultureIgnoreCase))
{
errorResponse.BucketRegion = parameter.Value.ToString();
}
}
errorResponse.Resource = response.Request.Resource;
if (HttpStatusCode.NotFound.Equals(response.StatusCode))
{
int pathLength = response.Request.Resource.Split('/').Count();
if (pathLength > 1)
{
errorResponse.Code = "NoSuchKey";
var objectName = response.Request.Resource.Split('/')[1];
e = new ObjectNotFoundException(objectName, "Not found.");
}
else if (pathLength == 1)
{
errorResponse.Code = "NoSuchBucket";
var bucketName = response.Request.Resource.Split('/')[0];
e = new BucketNotFoundException(bucketName, "Not found.");
}
else
{
e = new InternalClientException("404 without body resulted in path with less than two components");
}
}
else if (HttpStatusCode.Forbidden.Equals(response.StatusCode))
{
errorResponse.Code = "Forbidden";
e = new AccessDeniedException("Access denied on the resource: " + response.Request.Resource);
}
e.Response = errorResponse;
return e;
}
throw new InternalClientException("Unsuccessful response from server without XML error: " + response.StatusCode);
}
var contentBytes = System.Text.Encoding.UTF8.GetBytes(response.Content);
var stream = new MemoryStream(contentBytes);
ErrorResponse errResponse = (ErrorResponse)(new XmlSerializer(typeof(ErrorResponse)).Deserialize(stream));
ClientException clientException = new ClientException(errResponse.Message);
clientException.Response = errResponse;
clientException.XmlError = response.Content;
return clientException;
}