private static DigitalResource CreateNewResourceObject(ResourceModel.User owner, Stream fileStream, string originalName, ResourceType imageRT, ResourceType otherRT, string md5Sum)
{
DigitalResource resource = new ResourceModel.DigitalResource
{
Md5 = md5Sum,
OriginalFileName = originalName,
Size = fileStream.Length,
Uploaded = DateTime.Now,
Owners = new List <ResourceModel.User>()
};
resource.Owners.Add(owner);
if (ReferenceService.IsValidImage(fileStream))
{
resource.Type = imageRT;
//resource.Type = "Image";
resource.Date = ReferenceService.GetDateTakenFromImage(fileStream);
}
else
{
resource.Type = otherRT;
resource.Date = null;
}
return(resource);
}
/// <summary>
/// Get the specified file. This is restricted by user as files can be confidential
/// </summary>
/// <param name="id"></param>
/// <param name="user"></param>
/// <returns></returns>
public DigitalResource Get(string id, ResourceModel.User user)
{
DigitalResource resource;// list = new List<Resource>();
var sessionFactory = SessionFactoryCreator.CreateSessionFactory();
using (var session = sessionFactory.OpenSession())
{
using (session.BeginTransaction())
{
//session.CreateCriteria(typeof(DigitalResource)).ToList();
resource = (from res in session.Query <DigitalResource>()
where id == res.Md5 && res.Owners.Any(x => user.UserName == x.UserName)
select res).FirstOrDefault();
if (resource != null)
{
IAmazonS3 s3Client = new AmazonS3Client();
long size = s3Client.GetObjectMetadata("piccoli", id).ContentLength;
resource.Size = size;
}
}
}
return(resource);
}
private static DigitalResource CreateNewResourceObject(ResourceModel.User owner, long size, string originalName, ResourceType imageRT, ResourceType otherRT, string md5Sum)
{
DigitalResource resource = new ResourceModel.DigitalResource
{
Md5 = md5Sum,
OriginalFileName = originalName,
Size = size,
Uploaded = DateTime.Now,
Owners = new List <ResourceModel.User>()
};
resource.Owners.Add(owner);
//assume that resource type isn't an image.
resource.Type = otherRT;
resource.Date = null;
return(resource);
}
public string CompletePartialAndSaveResource(ReferenceRepository referenceRepository,
ResourceModel.User owner,
string uploadIdentifier,
String originalName,
String md5OfResource,
List <string> etags,
long totalSize)
{
IAmazonS3 s3Client = new AmazonS3Client();
ResourceModel.DigitalResource resource = null;
ResourceType imageRT = referenceRepository.AllResourceTypes().Where(x => x.Type == "Image").FirstOrDefault();
ResourceType otherRT = referenceRepository.AllResourceTypes().Where(x => x.Type == "Other").FirstOrDefault();
List <PartETag> partTags = new List <PartETag>();
int partNumber = 1;
foreach (string tag in etags)
{
partTags.Add(new PartETag {
ETag = tag, PartNumber = partNumber
});
partNumber++;
}
// complete the upload.
CompleteMultipartUploadRequest completeRequest = new CompleteMultipartUploadRequest
{
BucketName = "piccoli",
Key = md5OfResource,
UploadId = uploadIdentifier,
PartETags = partTags
};
// Complete the upload.
CompleteMultipartUploadResponse completeUploadResponse = s3Client.CompleteMultipartUpload(completeRequest);
//create the resource object
resource = CreateNewResourceObject(owner, totalSize, originalName, imageRT, otherRT, md5OfResource);
SaveResource(resource);//update the database
return(completeUploadResponse.ETag);
}
/// <summary>
/// Saves a NEW resource. Only saves if resource with the MD5Sum has not previously been added.
/// </summary>
/// <param name="referenceRepository"></param>
/// <param name="fileStream"></param>
/// <param name="originalName"></param>
/// <returns>the AWS Upload ID</returns>
public async Task <string> UploadPartial(ResourceModel.User owner,
string md5OfResource,
string uploadIdentifier,
Stream fileStream,
int partNumber,
int numberOfParts)
{
ResourceModel.DigitalResource resource = null;
//User user = reference
try
{
//bool exists = Exists(md5Sum);
DigitalResource existingResource = Get(md5OfResource);
if (existingResource == null)
{
//fileStream.Position = 0;
//TransferUtilityUploadRequest tuu = new TransferUtilityUploadRequest
//{
// InputStream = fileStream,
// BucketName = "piccoli",
// Key = "belvedere"
//};
//tr.UploadAsync(tuu);
//upload the file
IAmazonS3 s3Client = new AmazonS3Client();
//ListBucketsResponse response = s3Client.ListBuckets();
//https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/S3/TUploadPartResponse.html
//https://docs.aws.amazon.com/AmazonS3/latest/dev/LLuploadFileDotNet.html
string uploadID = uploadIdentifier;
if (partNumber == 1)
{
InitiateMultipartUploadRequest initiateRequest = new InitiateMultipartUploadRequest
{
BucketName = "piccoli",
Key = md5OfResource,
};
// Initiate the upload.
InitiateMultipartUploadResponse initResponse =
await s3Client.InitiateMultipartUploadAsync(initiateRequest);
uploadID = initResponse.UploadId;
}
// Upload part X
UploadPartRequest uploadRequest = new UploadPartRequest
{
BucketName = "piccoli",
Key = md5OfResource,
UploadId = uploadID,
PartNumber = partNumber,
PartSize = fileStream.Length, //5242880,//5MB ?
InputStream = fileStream
};
UploadPartResponse response = s3Client.UploadPart(uploadRequest);
return(uploadID);
}
return("resource already exists");
}
catch (AmazonS3Exception ex)
{
throw ex;
}
}
/// <summary>
/// Saves a NEW resource. Only saves if resource with the MD5Sum has not previously been added.
/// </summary>
/// <param name="referenceRepository"></param>
/// <param name="fileStream"></param>
/// <param name="originalName"></param>
/// <returns>DigitalResource with the length of the file. The Digital Resource may
/// be newly created OR retrieved from the database if it already exists</returns>
public ResourceModel.DigitalResource SaveOrGet(ReferenceRepository referenceRepository,
ResourceModel.User owner,
Stream fileStream,
String originalName)
{
ResourceModel.DigitalResource resource = null;
ResourceType imageRT = referenceRepository.AllResourceTypes().Where(x => x.Type == "Image").FirstOrDefault();
ResourceType otherRT = referenceRepository.AllResourceTypes().Where(x => x.Type == "Other").FirstOrDefault();
//User user = reference
try
{
//calculate md5 of the file to upload
string md5Sum = Md5Hash(fileStream);
//bool exists = Exists(md5Sum);
DigitalResource existingResource = Get(md5Sum);
if (existingResource == null)
{
//create the resource object
resource = new ResourceModel.DigitalResource
{
Md5 = md5Sum,
OriginalFileName = originalName,
Size = fileStream.Length,
Uploaded = DateTime.Now,
Owners = new List <ResourceModel.User>()
};
resource.Owners.Add(owner);
if (ReferenceService.IsValidImage(fileStream))
{
resource.Type = imageRT;
//resource.Type = "Image";
resource.Date = ReferenceService.GetDateTakenFromImage(fileStream);
}
else
{
resource.Type = otherRT;
resource.Date = null;
}
//fileStream.Position = 0;
//TransferUtilityUploadRequest tuu = new TransferUtilityUploadRequest
//{
// InputStream = fileStream,
// BucketName = "piccoli",
// Key = "belvedere"
//};
//tr.UploadAsync(tuu);
//upload the file
IAmazonS3 s3Client = new AmazonS3Client();
//ListBucketsResponse response = s3Client.ListBuckets();
using (TransferUtility tr = new TransferUtility(s3Client))
{
tr.Upload(fileStream, "piccoli", md5Sum);
//update the database
SaveResource(resource);
}
}
else
{
//another user also has a copy of this file
if (existingResource.Owners.Where(x => x.UserName == owner.UserName).FirstOrDefault() == null)
{
existingResource.Owners.Add(owner);
SaveResource(existingResource);
}
return(existingResource);
}
}
catch (AmazonS3Exception ex)
{
throw ex;
}
return(resource);
}
public bool ResourceExists(String hashID, ResourceModel.User user)
{
DigitalResource resource = Get(hashID, user);
return(resource != null);
}