I am trying to write a function in .net core 3.1 Class Library, to check file user rights.
Unfortunately, .net core 3.1 does not recognize GetAccessControl.
I have attached NUGET
System.IO.FileSystem 4.3.0
Microsoft.Windows.Compatability 7.0.0
Nothing works so far.
public static bool CheckFileAccess(string path, string domainUser)
{
var result = false;
try
{
using (FileStream file = new FileStream("path", FileMode.Open))
{
var acl = File.GetAccessControl(file.Name);
// do something with the acl
var rules = acl.GetAccessRules(true, true, typeof(System.Security.Principal.NTAccount));
foreach (FileSystemAccessRule rule in rules)
{
if (rule.IdentityReference.Value.Equals(domainUser, StringComparison.OrdinalIgnoreCase))
{
return true;
}
}
}
Console.WriteLine("User does not have access to the file.");
}
catch (UnauthorizedAccessException ex)
{
return result;
}
return result;
}
Related
I have developed a .NET Core 3.1 Web API which allows the users to upload their documents to S3 bucket. When I deploy the API to AWS ElasticBeansTalk EC2 instance and call the endpoint which uploads the file to S3, I get an error "Access Denied".
By the way, I have created IAM policy and role to give full access to S3 from my EC2 instance. I have also copied the .aws folder which contains credentials file onto the EC2 instance.
API Controller Action
public async Task<ApiResponse> UpdateProfilePic([FromBody]UploadProfilePicRequest model)
{
using (Stream stream = model.profilePicData.Base64StringToStream(out string header))
{
var tags = new List<KeyValuePair<string, string>>();
var metaData = new List<KeyValuePair<string, string>>();
metaData.Add(new KeyValuePair<string, string>("Content-Disposition", $"attachment; filename=\"{model.filename}\""));
if (_host.IsDevelopment())
{
tags.Add(new KeyValuePair<string, string>("public", "yes"));
}
await AmazonS3Uploader.UploadFileAsync(stream, "myDir/", model.fileId, tags, metaData);
}
}
The AmazonS3Helper class shown below:
using Amazon;
using Amazon.Runtime;
using Amazon.Runtime.CredentialManagement;
using Amazon.S3;
using Amazon.S3.Model;
using Amazon.S3.Transfer;
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
namespace UploderApp.Services
{
public static class AmazonS3Uploader
{
private static readonly RegionEndpoint bucketRegion = RegionEndpoint.APSouth1;
private static readonly IAmazonS3 s3Client = new AmazonS3Client(GetAwsCredentials(), bucketRegion);
private static readonly string S3Bucket = "abc-test";
private static AWSCredentials GetAwsCredentials()
{
var chain = new CredentialProfileStoreChain();
if (chain.TryGetAWSCredentials("MYPROFILE", out AWSCredentials awsCredentials))
{
return awsCredentials;
}
return null;
}
public static async Task UploadFileAsync(Stream fileStream, string virtualDirectory, string keyName)
{
try
{
using (var fileTransferUtility = new TransferUtility(s3Client))
{
//Upload data from a type of System.IO.Stream.
await fileTransferUtility.UploadAsync(fileStream, S3Bucket, virtualDirectory + keyName).ConfigureAwait(true);
}
}
catch (AmazonS3Exception e)
{
throw new Exception($"Error encountered on server. Message:'{e.Message}' when writing an object");
}
}
public static async Task UploadFileAsync(Stream stream, string virtualDirectory, string keyName, List<KeyValuePair<string, string>> tags = null, List<KeyValuePair<string, string>> metadata = null)
{
try
{
// Specify advanced settings.
var fileTransferUtilityRequest = new TransferUtilityUploadRequest
{
BucketName = S3Bucket,
InputStream = stream,
StorageClass = S3StorageClass.Standard,
Key = virtualDirectory + keyName
};
if (metadata != null)
{
foreach (var item in metadata)
{
fileTransferUtilityRequest.Metadata.Add(item.Key, item.Value);
}
}
if (tags != null)
{
fileTransferUtilityRequest.TagSet = new List<Tag>();
foreach (var tag in tags)
{
fileTransferUtilityRequest.TagSet.Add(new Tag { Key = tag.Key, Value = tag.Value });
}
}
using (var fileTransferUtility = new TransferUtility(s3Client))
{
await fileTransferUtility.UploadAsync(fileTransferUtilityRequest).ConfigureAwait(true);
}
}
catch (AmazonS3Exception e)
{
throw new Exception($"Error encountered on server. Message:'{e.Message}' when writing an object");
}
}
}
}
However, if I create a console application and use the above class without any modifications, it uploads the file from the same EC2 instance.
Code from the Main function of my Console Application.
public static void Main()
{
var file = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + "/Screenshot.png";
try
{
var tags = new List<KeyValuePair<string, string>>();
var metaData = new List<KeyValuePair<string, string>>();
metaData.Add(new KeyValuePair<string, string>("Content-Disposition", $"attachment; filename=\"profile-pic.png\""));
using (var stream = new FileStream(file, FileMode.Open))
{
AmazonS3Uploader.UploadFileAsync(stream, "mydir/", "screenshot.png", tags, metaData).GetAwaiter().GetResult();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
This is very strange. Can anybody help me to understand the root cause, please?
Edit:1
Output of the aws s3 ls s3://abc-test is shown below
Edit:2
Uploading the EC2 folder to S3
FATAL ERROR: Unhandled Access Violation Reading 0x0008 Exception at 1d8257a5h
Failed missing output
I finally made it work with HostApplicationServices.getRemoteFile in local AutoCAD, then migrated it to Design Automation. It is also working now. The below is the command of .NET plugin.
To have a simple test, I hard-coded the URL in the plugin. you could replace the URL with the workflow at your side (either by an json file, or input argument of Design Automation)
My demo ReadDWG the entities from the remote URL file, then wblock the entities to current drawing (HostDWG), finally save current drawing.
Hope it helps to address the problem at your side.
.NET command
namespace PackageNetPlugin
{
class DumpDwgHostApp: HostApplicationServices
{
public override string FindFile(string fileName,
Database database,
FindFileHint hint)
{
throw new NotImplementedException();
}
public override string GetRemoteFile(Uri url,
bool ignoreCache)
{
//return base.GetRemoteFile(url, ignoreCache);
Database db =
Autodesk.AutoCAD.ApplicationServices.Application.
DocumentManager.MdiActiveDocument.Database;
string localPath = string.Empty;
if (ignoreCache)
{
localPath =
Autodesk.AutoCAD.ApplicationServices.Application.
GetSystemVariable("STARTINFOLDER") as string;
string filename =
System.IO.Path.GetFileName(url.LocalPath);
localPath += filename;
using (var client = new WebClient())
{
client.DownloadFile(url, localPath);
}
}
return localPath;
}
public override bool IsUrl(string filePath)
{
Uri uriResult;
bool result = Uri.TryCreate(filePath,
UriKind.Absolute, out uriResult)
&& (uriResult.Scheme == Uri.UriSchemeHttp ||
uriResult.Scheme == Uri.UriSchemeHttps);
return result;
}
}
public class Class1
{
[CommandMethod("MyPluginCommand")]
public void MyPluginCommand()
{
try {
string drawingPath =
#"https://s3-us-west-2.amazonaws.com/xiaodong-test-da/remoteurl.dwg";
DumpDwgHostApp oDDA = new DumpDwgHostApp();
string localFileStr = "";
if (oDDA.IsUrl(drawingPath)){
localFileStr = oDDA.GetRemoteFile(
new Uri(drawingPath), true);
}
if(!string.IsNullOrEmpty(localFileStr))
{
//source drawing from drawingPath
Database source_db = new Database(false, true);
source_db.ReadDwgFile(localFileStr,
FileOpenMode.OpenTryForReadShare, false, null);
ObjectIdCollection sourceIds =
new ObjectIdCollection();
using (Transaction tr =
source_db.TransactionManager.StartTransaction())
{
BlockTableRecord btr =
(BlockTableRecord)tr.GetObject(
SymbolUtilityServices.GetBlockModelSpaceId(source_db),
OpenMode.ForRead);
foreach (ObjectId id in btr)
{
sourceIds.Add(id);
}
tr.Commit();
}
//current drawing (main drawing working with workitem)
Document current_doc =
Autodesk.AutoCAD.ApplicationServices.Application.
DocumentManager.MdiActiveDocument;
Database current_db = current_doc.Database;
Editor ed = current_doc.Editor;
//copy the objects in source db to current db
using (Transaction tr =
current_doc.TransactionManager.StartTransaction())
{
IdMapping mapping = new IdMapping();
source_db.WblockCloneObjects(sourceIds,
SymbolUtilityServices.GetBlockModelSpaceId(current_db),
mapping, DuplicateRecordCloning.Replace, false);
tr.Commit();
}
}
}
catch(Autodesk.AutoCAD.Runtime.Exception ex)
{
Autodesk.AutoCAD.ApplicationServices.Application.
DocumentManager.MdiActiveDocument.Editor.WriteMessage(ex.ToString());
}
}
}
}
I need to create a JAX-RS 2.0 client that posts a file and a couple of parameters using MULTIPART_FORM_DATA content type. (Don't need the service, just the client) I’ve seen some examples that depend on an specific implementation, like Jersey or RESTEasy, but I’d like not to bind my code to any... in particular, to Apache CXF (I am using WAS Liberty Profile). Any ideas on how to do it? Do I have to stick to some specific classes? If so, how can I do it using Apache CXF 3.0 (Liberty uses CXF for JAX-RS 2.0)
Thanks
[I currently cannot comment under the already written answer]
If someone is searching for the maven dependency of IMultipartBody from the answer of Anatoly:
<dependency>
<groupId>com.ibm.websphere.appserver.api</groupId>
<artifactId>com.ibm.websphere.appserver.api.jaxrs20</artifactId>
<version>1.0.39</version>
<scope>provided</scope>
</dependency>
Thanks to andymc12 from https://github.com/OpenLiberty/open-liberty/issues/11942#issuecomment-619996093
You can use this example how to implement it by using jax-rs 2.0 feature: https://www.ibm.com/support/knowledgecenter/SSD28V_8.5.5/com.ibm.websphere.wlp.nd.doc/ae/twlp_jaxrs_multipart_formdata_from_html.html this is almost working example (some statements should be wrapped in try-catch block, but you'll see when'll post it to IDE.
package com.example.jaxrs;
#POST
#Consumes("multipart/form-data")
#Produces("multipart/form-data")
public Response postFormData(IMultipartBody multipartBody) {
List <IAttachment> attachments = multipartBody.getAllAttachments();
String formElementValue = null;
InputStream stream = null;
for (Iterator<IAttachment> it = attachments.iterator(); it.hasNext();) {
IAttachment attachment = it.next();
if (attachment == null) {
continue;
}
DataHandler dataHandler = attachment.getDataHandler();
stream = dataHandler.getInputStream();
MultivaluedMap<String, String> map = attachment.getHeaders();
String fileName = null;
String formElementName = null;
String[] contentDisposition = map.getFirst("Content-Disposition").split(";");
for (String tempName : contentDisposition) {
String[] names = tempName.split("=");
formElementName = names[1].trim().replaceAll("\"", "");
if ((tempName.trim().startsWith("filename"))) {
fileName = formElementName;
}
}
if (fileName == null) {
StringBuffer sb = new StringBuffer();
BufferedReader br = new BufferedReader(new InputStreamReader(stream));
String line = null;
try {
while ((line = br.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
formElementValue = sb.toString();
System.out.println(formElementName + ":" + formElementValue);
} else {
//handle the file as you want
File tempFile = new File(fileName);
...
}
}
if (stream != null) {
stream.close();
}
return Response.ok("test").build();
}
I have created an MVC 4 application which targets .NET 4.0. After deploying to my production server, it will show the login page but will not redirect to the default page. However, when I add debugging, I can see that the authentication process works but then the error I am getting is an error that says it can't find my View for my Error Page and then shows my Error Page. It just seems that it will not go to my "Home/Index" page - even when I remove the authorize attribute. Of course the application works in development. Additionally, it will not go to my register page or forgot login page.
My Login Controller looks like this:
[HttpPost]
[AllowAnonymous]
[ValidateAntiforgeryToken]
public ActionResult Login(LoginViewModel model, string returnUrl)
{
if(ModelStat.IsValid && _userService.Login(model.UserId, model.Password))
{
var user = _userService.GetUser(model.UserId);
var loggedInUser = new LoggedInUser
{
// Build the user for custom IPrincipal
};
var userData = JsonConvert.SerializeObject(loggedInUser);
var compressData = StringCompression.Compress(userData);
var authTicket = new FormsAuthenticationTicket(
1,
user.UserId,
DateTime.Now,
DateTime.Now.AddHours(1),
false,
compressData);
var encTicket = FormsAuthentication.Encrypt(authTicket);
if(encTicket != null)
{
var faCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encTicket)
{
HttpOnly = true
};
Response.Cookies.Add(faCookie);
}
user.LastActivityDate = DateTime.Now;
user.LastLoginDate = DateTime.Now;
_userService.UpdateUser(user);
_uow.Commit();
return Url.IsLocalUrl(returnUrl) ? (ActionResult)Redirect(returnUrl) : RedirectToAction("Index", "Home");
}
return View(model);
and in my Global.asax:
protected void Application_PostAuthenticateRequest(object sender, EventArgs e)
{
var authCookie = Request.Cookies[FormsAuthentication.FormsCookieName];
if(authCookie != null)
{
var decompressedData = StringCompression.Decompress(authTicket.UserData);
var loggedInUser = JsonConvert.DesrializeObject<LoggedInUser>(decompressedData);
var currrentUser = new CustomPrincipal(authTicket.Name)
{
// Build the CustomPrincipal from the loggedInUser
};
if(HttpContext.Current.User.Identity.IsAuthenticated)
{
HttpContext.Current.User = currentUser;
}
}
}
I hope that this is enough to give someone an idea of what I may be doing wrong. Somehow I feel that it is something small that I am missing. Thanks in advance.
~InDireStraits
Update:
After more troubleshooting, it would seem that the issue may have something to do with the fact that I am using a BaseController for specifying permissions but I am still baffled as to why the application works as intended in my development environment but not in production. To verify my IIS settings I installed the default MVC4 App to production which does not have .NET 4.5, and it runs. I am using VS 2012 so I do have 4.5. Could I somehow be introducing .NET 4.5 classes or functionality even if this targets .NET 4.0? At any rate, here is my BaseController code:
public class BaseController: Controller
{
private string _actionKey;
private const string PermisisionList = "permissionList";
private Dictionary<string, string> _requiredActionPermissions;
private static readonly IControllerActionService<ControllerAction> _actionService;
protected new CustomPrincipal User
{
get
{
return HttpContext.User as CustomPrincipal;
}
}
public BaseController(IControllerActionService<ControllerAction> actionService)
{
_actionService = actionService;
}
protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
// Check to see if the PermissionList is loaded and load if necessary
if(!CacheLayer.Exists(PermissionList))
{
_requiredActionPermissions = _actionService.GetControllerActionDictionary();
CacheLayer.Add(_requiredActionPermissions, PermissionList);
}
else
{
_requiredActionPermission = CacheLayer.Get<Dictionary<string, string>>(PermissionList);
}
// Get the Controller/Action of the current request
_actionKey = string.Format("{0}-{1}", filterContext.ActionDescriptor.ControllerDescriptor.ControllerName, filterContext.ActionDescriptor.ActionName);
// If the user is authenticated, grab the permissions
if(filterContext.HttpContext.User.Identity.IsAuthenticated)
{
var userPermissions = User.Permissions;
if(!_requiredActionPermissions.Values.Any(a=>a.Equals(_actionKey, StringComparison.OrdinalIgnoreCase)))
{
return;
}
if(userPermissions.Contains(_requiredActionsPermissions.FirstOrDefault(x=>x.Value == _actionKey).Key))
{
return;
}
filterContext.Result = new RedirectResult("~/Error/ErrorUnauthorized");
return;
}
if(!filterContext.HttpContext.User.Identity.IsAuthenticated)
{
if(!_requiredActionPermissions.Values.Any(a=>a.Equals(_actionKey, StringComparison.OrdinalIgnoreCase)))
{
return;
}
}
if(filterContext.HttpContext.Request.Url == null)
{
return;
}
if(filterContext.HttpContext.Request.Url.AbsolutePath == FormsAuthentication.LoginUrl)
{
return;
}
var redirectUrl = string.Format("?returnUrl={0}", filterContext.HttpContext.Request.Url.PathAndQuery);
filterContext.HttpContext.Response.Redirect(FormsAuthentication.LoginUrl + redirectUrl, true);
}
UPDATE 2: Installed .NET 4.52 on Staging Server and the application now works as intended. The problem is that I will not be able to install this on the production server. I don't understand what it is that 4.5 is fixing that 4.0 does not seem to facilitate. HELLLLLLPPP!!!!!!
The answer can be found here. To summarize, I added an extra parameter to my route config that worked in 4.5 but not in 4.0. Will follow up on the linked question. Thanks
I'm new to windows app development.How can I make sqlite database in windows phone 8 app?This link shows how to use local databse but I want sqlite databse http://msdn.microsoft.com/en-us/library/windowsphone/develop/hh202876(v=vs.105).aspx
thanks in advance....
you can download a nuget package called sqlite for windows phone.
then you can a .db file in your project or can create a new by using following code.
public static SQLiteAsyncConnection connection;
public static bool isDatabaseExisting;
public static async void ConnectToDB()
{
try
{
StorageFile storageFile = await ApplicationData.Current.LocalFolder.GetFileAsync("DelhiMetroDB.db");
isDatabaseExisting = true;
}
catch (Exception ex)
{
isDatabaseExisting = false;
}
if (!isDatabaseExisting)
{
try
{
StorageFile databaseFile = await Package.Current.InstalledLocation.GetFileAsync("DelhiMetroDB.db");
await databaseFile.CopyAsync(ApplicationData.Current.LocalFolder);
isDatabaseExisting = true;
}
catch (Exception ex)
{
isDatabaseExisting = false;
}
}
if (isDatabaseExisting)
{
connection = new SQLiteAsyncConnection(Path.Combine(ApplicationData.Current.LocalFolder.Path, "DelhiMetroDB.db"), true);
}
}
}
}
then you can use this variable connection to connect with database like :
var result= classname.connection.QueryAsync<objecttype>("SELECT * FROM tablename").Result;