/// <summary>
/// This canWrite() method return true if user has write permission
/// </summary>
/// <param name="userID"></param>
/// <param name="containerID"></param>
/// <returns></returns>
public Boolean canWrite(int userID, int containerID)
{
if (isOwner(userID, containerID))
{
return(true);
}
DBManager.CListM cmgr = new DBManager.CListM();
DBManager.ResourceM resmgr = new DBManager.ResourceM();
Model.AzureContainerModel rmodel = new Model.AzureContainerModel();
try
{
rmodel = resmgr.getResourceById(connection, containerID);
String permission = cmgr.checkResourcePermission(connection, userID, rmodel.getContainerName());
if (permission.Equals("WRITE"))
{
return(true);
}
}
catch (DBLikeExceptions.CloudContainerNotFoundException)
{
return(false);
}
return(false);
}
/// <summary>
/// This method inserts record to the CONTAINERS table.
/// </summary>
/// <param name="connection"></param>
/// <param name="uid"></param>
/// <param name="containerName"></param>
/// <returns>true/false</returns>
public Boolean insertIntoResources(SqlConnection connection, Model.AzureContainerModel resource)
{
try
{
//---Should have used auto-increment
command = new SqlCommand("SELECT MAX(RID) FROM CONTAINERS", connection);
reader = command.ExecuteReader();
int rid = 10000; //starting resource id from 10001
if (!reader.HasRows)
{
rid = rid + 1;
}
else
{
while (reader.Read())
{
rid = reader.GetInt32(0);
}
rid = rid + 1;
}
Console.WriteLine("Resource ID" + rid);
command = new SqlCommand("INSERT INTO CONTAINERS (RID, GIVENNAME, OWNER, CONTAINERNAME) VALUES (@RID, @GIVENNAME, @OWNER, @CONTAINERNAME)");
command.CommandType = CommandType.Text;
command.Connection = connection;
command.Parameters.AddWithValue("@RID", rid);
command.Parameters.AddWithValue("@GIVENNAME", resource.getGivenName());
command.Parameters.AddWithValue("@OWNER", resource.getOwner());
command.Parameters.AddWithValue("@CONTAINERNAME", resource.getContainerName());
command.ExecuteNonQuery();
/* Following table retains the entry of user-resource which is sharing
* Model.CListModel cm = new Model.CListModel();
* cm.setRid(rid);
* cm.setUid(uid);
* cm.setReadwrite(1);
* reader.Close();
* CListM c = new CListM();
*
* //on adding resource, the default will be given to resource {DEFAULT(READ, READWRITE) = True}
* return c.insertIntoCList(connection, cm);
*/
}
catch (Exception e)
{
Console.WriteLine("insertIntoResources in class User says->" + e.Message);
return(false);
}
reader.Close();
return(true);
}
/// <summary>
/// This method returns the list of containers which are shared with given user
/// each element seems like "CONTAINERNAME:OWNERFULLNAME:GIVENCONTAINERNAME" //User friendly manner
/// </summary>
/// <param name="connection"></param>
/// <param name="userid"></param>
/// <returns>null/string array contains the name of containers</returns>
public String[] getSharedContainersWithUser(SqlConnection connection, int userid)
{
String[] sharedContainers = null;
try {
command = new SqlCommand("SELECT RID, OWNER FROM CLIST WHERE UID = @UID");
command.CommandType = CommandType.Text;
command.Connection = connection;
command.Parameters.AddWithValue("@UID", userid);
reader = command.ExecuteReader();
//no containers shared with user
if (!reader.HasRows)
{
return(null);
}
ResourceM r = new ResourceM();
UserM u = new UserM();
int currRid = 0;
String ownerName = null;
Model.AzureContainerModel cont = new Model.AzureContainerModel();
List <String> containersString = new List <String>();
while (reader.Read())
{
currRid = reader.GetInt32(0);
cont = r.getResourceById(connection, currRid);
Console.WriteLine("Owner: " + reader.GetInt32(1));
ownerName = (u.getUserRecordByID(connection, (reader.GetInt32(1)))).getFullName();
containersString.Add((cont.getContainerName()) + ":" + ownerName + ":" + (cont.getGivenName()));
}
reader.Close();
sharedContainers = containersString.ToArray();
return(sharedContainers);
}
catch (SqlException ex)
{
Console.WriteLine("CListM class: getSharedContainersWithUser method Exception->" + ex.Message);
}
return(null);
}
/// <summary>
/// This renameFile() method renames the file
/// </summary>
/// <param name="username"></param>
/// <param name="path"></param>
public void renameFile(String username, String path, String newname) //path> containerID:filepath
{
try
{
//Break the path <containerID:filepath>
String[] pathTokens = path.Split(':');
DBManager.UserM user = new DBManager.UserM();
Model.UserModel u;
u = user.getUserRecord(connection, username);
String container = pathTokens[0];
String blobfile = pathTokens[1];
DBManager.ResourceM contDetail = new DBManager.ResourceM();
Console.WriteLine("ResourceID:" + container);
Model.AzureContainerModel cont = contDetail.getResourceById(connection, Int32.Parse(container));
if (cont.getOwner() != u.getUid()) //user is not owner
{
Resource res = new Resource();
if (!res.canWrite(u.getUid(), Int32.Parse(container))) //not having write permission
{
throw new DBLikeExceptions.UnauthorizedAccessException();
}
}
container = cont.getContainerName();
//Check if container exists
CloudBlobContainer myContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(container); //Container ref
Boolean isContainerexists = BlobStorageManager.BlobStorage.isContainerExists(myContainer);
if (isContainerexists == false)
{
Console.WriteLine("Container not found");
throw new DBLikeExceptions.CloudContainerNotFoundException();
}
//Check if blob exists
CloudBlockBlob oldblob = BlobStorageManager.BlobStorage.getCloudBlob(container + '/' + blobfile); //Get reference to blob
Boolean isBlobexists = BlobStorageManager.BlobStorage.isBlobExists(oldblob);
if (isBlobexists == false)
{
Console.WriteLine("Blob not found");
throw new DBLikeExceptions.CloudBlobNotFoundException();
}
ICloudBlob newblob = null;
if (oldblob is CloudBlockBlob)
{
newblob = myContainer.GetBlockBlobReference(newname);
}
else
{
newblob = myContainer.GetPageBlobReference(newname);
}
//CloudBlockBlob newblob = BlobStorageManager.BlobStorage.getCloudBlob(container + '/' + newname); //Get reference to blob
//copy the blob
newblob.StartCopyFromBlob(oldblob.Uri);
while (true)
{
newblob.FetchAttributes();
if (newblob.CopyState.Status != CopyStatus.Pending) //check the copying status
{
break;
}
System.Threading.Thread.Sleep(1000); //sleep for a second
}
//delete old blobfile
oldblob.Delete();
}
catch (Microsoft.WindowsAzure.Storage.StorageException e)
{
Console.WriteLine("File:renameFile says->>" + e.Message);
}
}
/// <summary>
/// This deleteFileFromContainer() methd deletes the given file from the given container
/// It may throw exceptions like UnauthorizedAccessException, CloudContainerNotFoundException, CloudBlobNotFoundException
/// </summary>
/// <param name="username"></param>
/// <param name="path"></param>
public void deleteFileFromContainer(String username, String path) //path>> containerID:filepath
{
try
{
//Break the path <containerID:filepath>
String[] pathTokens = path.Split(':');
DBManager.UserM user = new DBManager.UserM();
Model.UserModel u;
u = user.getUserRecord(connection, username);
if (u == null)
{
Console.WriteLine("No user found");
return;
}
String container = pathTokens[0];
String blobfile = pathTokens[1];
String containerAzureName;
if (username.Equals(container))
{
containerAzureName = u.getUid().ToString();
}
else
{
Resource res = new Resource();
int containerID = res.getContainerID(u.getUid(), container);
if (containerID == -1)
{
throw new DBLikeExceptions.CloudContainerNotFoundException();
}
if (!res.canWrite(u.getUid(), containerID))
{
throw new DBLikeExceptions.UnauthorizedAccessException();
}
DBManager.ResourceM contDetail = new DBManager.ResourceM();
//Console.WriteLine("ResourceID:" + container);
Model.AzureContainerModel cont = contDetail.getResourceById(connection, containerID);
if (cont == null)
{
throw new DBLikeExceptions.CloudContainerNotFoundException();
}
containerAzureName = cont.getContainerName();
}
//if (cont.getOwner() != u.getUid()) //user is not owner
//{
// Resource res = new Resource();
// if (!res.canWrite(u.getUid(), Int32.Parse(container))) //not having write permission
// {
// throw new DBLikeExceptions.UnauthorizedAccessException();
// }
//}
//Check if container exists
CloudBlobContainer myContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(containerAzureName); //Container ref
Boolean isContainerexists = BlobStorageManager.BlobStorage.isContainerExists(myContainer);
if (isContainerexists == false)
{
throw new DBLikeExceptions.CloudContainerNotFoundException();
}
//Check if blob exists
try
{
CloudBlockBlob myblob = BlobStorageManager.BlobStorage.getCloudBlob(containerAzureName + '/' + blobfile); //Get reference to blob
Boolean isBlobexists = BlobStorageManager.BlobStorage.isBlobExists(myblob);
if (isBlobexists == false || myblob.Properties.ContentType.Equals("file/deleted"))
{
Console.WriteLine("Blob not found or deleted");
throw new DBLikeExceptions.CloudBlobNotFoundException();
}
myblob.DeleteIfExists();
myblob.UploadFromByteArray(new byte[0], 0, 0);
myblob.Properties.ContentType = "file/deleted";
myblob.SetProperties();
}
catch (Microsoft.WindowsAzure.Storage.StorageException e)
{
Console.WriteLine("File:deleteFileFromContainer says->>" + e.Message);
throw new DBLikeExceptions.CloudBlobNotFoundException();
}
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// This method returns a list of strings as follows:
/// > if 'path' is empty, a list of all containers that username can access
/// > else path format userid:containername, it will list all files in given container
/// THROW UNAUTHORIZEDACCESSEXCEPTION IF USER HAS NO RIGHT TO ACCESS THE MENTIONED PATH
/// </summary>
/// <param name="username"></param>
/// <param name="path"></param>
/// <returns></returns>
public String[] list(String emailID, String givencontainerName) //path containerName
{
DBManager.ResourceM resource = new DBManager.ResourceM();
DBManager.UserM user = new DBManager.UserM();
Model.UserModel u = new Model.UserModel();
u = user.getUserRecord(connection, emailID);
if (String.IsNullOrEmpty(givencontainerName))
{
Console.WriteLine("LIST ALL CONTAINERS FOR {0}", u.getUid());
DBManager.CListM cl = new DBManager.CListM();
String[] sharedContainers = null;
sharedContainers = cl.getSharedContainersWithUser(connection, u.getUid());//CONTAINERNAME:OWNERFULLNAME:GIVENCONTAINERNAME
//Get the list of containers user owns
String[] containers = null;
containers = resource.getContainersOwnedByUser(connection, u.getUid()); //<CONTAINERNAME:GIVENNAME>
Console.WriteLine("Total containers OWNED BY user : {0}", (containers.Length));
//Console.WriteLine("Total containers SHARED WITH user: {0}", sharedContainers.Length); //sometimes cause problem no share container exists
String[] allContainers;
if (sharedContainers == null)
{
allContainers = new String[containers.Length];
containers.CopyTo(allContainers, 0);
}
else
{
allContainers = new String[containers.Length + sharedContainers.Length];
containers.CopyTo(allContainers, 0);
sharedContainers.CopyTo(allContainers, containers.Length);
}
return(allContainers);
}
Console.WriteLine("GIVEN CONT: " + givencontainerName + " uid: " + u.getUid());
string containerName;
if (givencontainerName.Equals(emailID)) //Considering this new change, I'm going to map containername with user email id
{
containerName = u.getUid().ToString();
}
else
{
Resource r = new Resource();
int containerID = r.getContainerID(u.getUid(), givencontainerName);
if (containerID == -1)
{
throw new DBLikeExceptions.CloudContainerNotFoundException();
}
DBManager.ResourceM rmgr = new DBManager.ResourceM();
Model.AzureContainerModel cont = rmgr.getResourceById(connection, containerID);
if (cont == null)
{
return(new String[0]);
}
containerName = cont.getContainerName();
}
Console.WriteLine(containerName);
//Obtain reference of user's blob container
CloudBlobContainer myContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(containerName);
List <String> blobs = new List <String>();
//List the files(or blobs) contained by folder(or container)
foreach (var blobItem in myContainer.ListBlobs())
{
//Console.WriteLine(blobItem.Uri+",");
if (blobItem is CloudBlobDirectory)
{
addRecursive((CloudBlobDirectory)blobItem, blobs);
}
else
{
addFile(blobItem.Uri.LocalPath, blobs);
}
}
String[] blobnames = blobs.ToArray();
return(blobnames);
}
/// <summary>
/// This method takes (username, path{containerid:path}, local path) and download file from blob storage
/// to given local path
/// THROW UNAUTHORIZEDACCESSEXCEPTION IF USER HAS NO RIGHT TO ACCESS THE MENTIONED PATH
/// THROW CLOUDBLOBNOTFOUNDEXCEPTION or CLOUDBLOBNOTFOUNDEXCEPTION IF GIVEN FILEPATH DOESN'T EXISTS
/// </summary>
/// <param name="username"></param>
/// <param name="path"></param>
/// <param name="data"></param>
public void download(String username, String path, Stream targetStream) //containerid:filepath
{
try
{
//Break the path <containerid>
String[] usercont = path.Split(':');
DBManager.UserM user = new DBManager.UserM();
Model.UserModel u;
u = user.getUserRecord(connection, username);
String containerP = usercont[0];
String blobname = usercont[1];
/*
* Model.UserModel u2;
* u2 = user.getUserRecord(connection, srcUser);
*
* String userid = u2.getUid().ToString();
* String fullpath = usercont[1];
* String blobName = fullpath.Substring(fullpath.IndexOf('/')+1);
* //String container = fullpath.Substring(0, fullpath.IndexOf('/'));
*/
String container = containerP;
DBManager.ResourceM contDetail = new DBManager.ResourceM();
Console.WriteLine("ResourceID:" + containerP);
Model.AzureContainerModel cont = contDetail.getResourceById(connection, Int32.Parse(containerP));
Resource res = new Resource();
if (cont.getOwner() != u.getUid()) //user isn't owner
{
if (!res.canRead(u.getUid(), Int32.Parse(containerP))) //not having read permission
{
throw new DBLikeExceptions.UnauthorizedAccessException();
}
}
container = cont.getContainerName();
//Check if container exists
CloudBlobContainer myContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(container);
Boolean isContainerexists = BlobStorageManager.BlobStorage.isContainerExists(myContainer);
if (isContainerexists == false)
{
throw new DBLikeExceptions.CloudContainerNotFoundException();
}
//Check if blob exists
CloudBlockBlob myblob = BlobStorageManager.BlobStorage.getCloudBlob(container + '/' + blobname); //Get reference to blob
Boolean isBlobexists = BlobStorageManager.BlobStorage.isBlobExists(myblob);
if (isBlobexists == false)
{
Console.WriteLine("Container not found");
throw new DBLikeExceptions.CloudBlobNotFoundException();
}
Console.WriteLine(myblob);
myblob.DownloadToStream(targetStream);
}
catch (Microsoft.WindowsAzure.Storage.StorageException ex)
{
//throw new Microsoft.WindowsAzure.Storage.StorageException();
Console.WriteLine("download method in User class says->" + ex.Message);
return;
}
}
/// <summary>
/// This method takes (path{containerID:path}, local path) and uploads the file to blob storage
/// THROW UNAUTHORIZEDACCESSEXCEPTION IF USER HAS NO RIGHT TO ACCESS THE MENTIONED PATH
/// NOTE---------------->>>>>>>>>>
/// For uploading, first need to pass the containerID in path which can be obtained by using Resource:getContainerID()
/// then check for write permission using Resource:canWrite() then call this operation
/// For example :
/// Path <9043: bar/foo.txt> means we want to create a folder named bar and save foo.txt file in container 9043
/// </summary>
/// <param name="username"></param>
/// <param name="path"></param>
/// <param name="data"></param>
public void upload(UPLOAD_INFO info, String localpath)
{
try
{
String username = info.username;
String path = info.path;
DBManager.UserM umgr = new DBManager.UserM();
Model.UserModel user = new Model.UserModel();
user = umgr.getUserRecord(connection, username);
//Break the path <containerid:path>
String[] pathTokens = path.Split(':');
String destinationCont = pathTokens[0];
String destinationPath = pathTokens[1];
String mycontainer = destinationCont;
CloudBlobContainer destContainer;
if (username.Equals(destinationCont))
{
Console.WriteLine("File.cs#upload(): Writing to user private area.");
destContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(user.getUid().ToString());
}
else
{
DBManager.ResourceM contDetail = new DBManager.ResourceM();
Resource res = new Resource();
int containerId = res.getContainerID(user.getUid(), destinationCont);
if (containerId == -1)
{
throw new DBLikeExceptions.CloudContainerNotFoundException("File.cs#upload: no container");
}
Model.AzureContainerModel container = contDetail.getResourceById(connection, containerId);
Console.WriteLine("File.cs#upload(): Writing to shared container {0}", container.getContainerName());
destContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(container.getContainerName());
}
/*
* Console.WriteLine("ResourceID:" + destinationCont);
*
* Resource res = new Resource();
*
* if (container.getOwner() != user.getUid()) //user is not owner
* {
* if (!res.canWrite(user.getUid(), Int32.Parse(destinationCont))) //not having write permission
* {
* throw new DBLikeExceptions.UnauthorizedAccessException();
* }
* }
* mycontainer = container.getContainerName();
* */
//CloudBlobContainer myContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(mycontainer);
String blobName = String.Format(destinationPath);
CloudBlockBlob file = destContainer.GetBlockBlobReference(blobName);
using (FileStream fstream = new FileStream(localpath, FileMode.Open))
{
file.UploadFromStream(fstream);
}
BlobStorageManager.BlobFileHandler bhandler = new BlobStorageManager.BlobFileHandler();
//fstream = new FileStream(localpath, FileMode.Open);
//file.Properties.
file.Metadata["HashValue"] = info.curHash;
file.Metadata["ClientModifyTime"] = info.utcTime.Ticks.ToString();
file.SetMetadata();
file.Properties.ContentType = "file/active";
file.SetProperties();
}
catch (Microsoft.WindowsAzure.Storage.StorageException ex)
{
Console.WriteLine("upload method in User class says-> " + ex);
}
}
/// <summary>
/// This deleteSharedContainer() method just deletes container as per given containerID
/// which means pre-check is required to call this method
/// </summary>
/// <param name="containerID"></param>
/// <returns>true/false/exception</returns>
public Boolean deleteSharedContainer(int containerID)
{
//throw new NotImplementedException();
//Console.WriteLine("DeleteSharedCOntainer NYI");
try
{
Model.AzureContainerModel res = new Model.AzureContainerModel();
DBManager.ResourceM rmgr = new DBManager.ResourceM();
res = rmgr.getResourceById(connection, containerID);
CloudBlobContainer myContainer = BlobStorageManager.BlobStorage.getCloudBlobContainer(res.getContainerName()); //Container ref
Boolean isContainerexists = BlobStorageManager.BlobStorage.isContainerExists(myContainer);
if (isContainerexists == false)
{
throw new DBLikeExceptions.CloudContainerNotFoundException();
}
if (myContainer.ListBlobs().GetEnumerator().MoveNext())
{
throw new ArgumentException("container not empty");
}
myContainer.Delete();
//Delete from database
DBManager.CListM cmgr = new DBManager.CListM();
if (cmgr.deleteUserEntryFromCLIST(connection, 0, containerID)) //delete all records from CLIST
{
if (rmgr.deleteContainerEntryFromCONTAINERS(connection, containerID.ToString())) //delete from CONTAINERS
{
return(true);
}
}
}
catch (Microsoft.WindowsAzure.Storage.StorageException e)
{
Console.WriteLine("Resource:deleteSharedContainer Exception:" + e.Message);
}
return(false);
}
