I have to check whether an FTP Server allows me to delete a file or not. Without deleting an existing file or sending a file and trying to delete that file.
For now, I use the 'Send a file and try to Delete it' dummy solution, but sometimes I don't have write permission.
I tried the code below using Chilkat library, but as I know, there are only Read, Write and Execute attributes, and the Delete attribute doesn't exist.
var ftp = new Chilkat.Ftp2();
ftp.Hostname = "127.0.0.1";
ftp.Username = "test";
ftp.Password = "test";
ftp.AuthTls = false;
ftp.PassiveUseHostAddr = true;
ftp.Connect();
// To get file permissions in UNIX format, disallow MSLD:
ftp.AllowMlsd = false;
if (ftp.GetDirCount() > 0)
{
textBox1.AppendText("The permissions format is: " + ftp.GetPermType(0));
textBox1.AppendText("\r\n");
}
for(var i = 0; i < ftp.GetDirCount();++i)
{
// Display the permissions and filename
textBox1.AppendText(ftp.GetPermissions(i) + " " + ftp.GetFilename(i));
textBox1.AppendText("\r\n");
}
ftp.Disconnect();
So, according to my explanation above, Is it possible to determine whether the FTP server has Delete File permission or not? If yes,
There's no API in FTP protocol to test for permissions.
You can try to interpret the permissions you get from the FTP directory listing.
But for example on *nix systems, the listing never gives you enough information for such decision.
Btw, on *nix servers, you have permissions to delete a file, if you have write permissions to its parent directory. What is the same permissions for for creating a new file. So normally, if you can create a file, you can delete a file. But FTP servers commonly impose another permissions on top of the system permissions. And those usually include separate permissions for creating and deleting files.
Related
Is it possible to save file to other domain path from file control. I have 2 website www.domain1.com & www.domain2.com. Now I have file control in www.domain1.com & here I want to upload a file which will be store in some directory of www.domain2.com. I don't know is it possible or not. I am trying below basic code but it's not working
if (mainImageUploader.FileName != "")
{
System.IO.FileInfo file = new System.IO.FileInfo(mainImageUploader.PostedFile.FileName);
string newname = file.Name.Remove((file.Name.Length - file.Extension.Length));
newname = (newname + System.DateTime.Now.ToString("_ddMMyyhhmmss")) + file.Extension;
mainImageUploader.SaveAs(Server.MapPath("http://www.domain2.com/images/client-store/" + path + newname));
}
No, not possible if your other server is configured anywhere near correctly.
You need to enable endpoint on your other server to provide file upload. And probably need to secure it somehow - i.e. with username/password.
It's not possible. The better way is creating a WebApi to save file on its server on your second website and save file via calling it from your first website.
Each web server only let to each website to access to its root and subfolders or files.
We have an application on a shared server, and some unwanted files appeared on our ftp (asp file, certainly by injection or lack of security). The application is in C#.
Impossible to remove those files by FTP (unauthorized).
I've made a GetOwner request and those files seem to have as owner DOMAIN\IISUSR.
I try to change owner or to add ACL on the file, but I receive an unauthorized exception.
System.IO.FileInfo sFile = new System.IO.FileInfo(sPathFile);
System.Security.AccessControl.FileSecurity sFS = sFile.GetAccessControl();
if (System.IO.File.Exists(sPathFile))
{
try
{
IdentityReference sGet = new NTAccount(#"DOMAIN\MYUSER");
sFS.AddAccessRule(new FileSystemAccessRule(#"DOMAIN\IISUSR", FileSystemRights.FullControl, AccessControlType.Allow));
sFile.SetAccessControl(sFS);
}
}
I've tried with MYUSER = the ftp account (to be able to remove it by ftp.
I've tried with MYUSER = IISUSR, if the file had the ownership but without rights.
But I can get rid of the exception.
As far as its a shared server, I have IIS Admin Remote access, but so only on read level; I have access on ftp and so access through C# local execution...
Do you have an idea ?
TY !
I am trying to moving a file from one folder to another using FtpWebRequest but i keep getting error 550. This is my code;
var requestMove = (FtpWebRequest)WebRequest.Create(Helper.PathFtp + Helper.NewFolder + file);
requestMove.Method = WebRequestMethods.Ftp.Rename;
requestMove.Credentials = networkCredential;
requestMove.RenameTo = "../" + Helper.OldFolder + file;
requestMove.GetResponse();
I can list, upload, download and delete files but moving/renaming is hopeless. I have read several posts both on stackoverflow and other sites and have tried things like setting Proxy to null and adding special characters to paths but I cant find a solution that works.
The path I use in WebRequest.Create is correct as I can delete it so it must be the RenameTo I got an issue with. Any ideas?
Error 550 means access denied. If the ftp user has sufficient rights, a program (e.g. antivirus, windows thumbnail generator etc) could have the file opened and deny your move request.
You need to contact the server administrator to get around the problem.
I created a PDF webapp where users are able to generate various type of PDF on both the computer and mobile phone. However, i run my program on a localhost and this is how i save my PDF based on my computer's file directory
var output = new FileStream(Path.Combine("C:\\Users\\apr13mpsip\\Downloads", filename), FileMode.Create);
However, when i publish my webapp onto azure, i wasn't able to download from both my computer and mobile phone. Therefore i believe that it could be due to my default file directory.
Hence i would like to ask how to do a default file directory for all computer and mobile phone?
Or could it be i left out something that is necessary when the webapp is published online
Thanks.
PS : I hardcoded a default file path in order for me to test my application on a localhost to ensure a perfect working condition. Therefore i'm finding a way to find a default common file directory for all mobile/computer users when they attempt to download the PDF instead of my usual hard-coded file path
UPDATE
I tried using the method Server.MapPath but receive some error.
var doc1 = new Document();
var filename = Server.MapPath("~/pdf") + "MyTestPDF" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".pdf";
// var output = new FileStream(Path.Combine("C:\\Users\\apr13mpsip\\Downloads", filename), FileMode.Create);
//iTextSharp.text.pdf.PdfWriter.GetInstance(doc1, output);
using (var output = File.Create(filename))
{
iTextSharp.text.pdf.PdfWriter.GetInstance(doc1, output);
}
doc1.Open();
This is the error i received
ObjectDisposedException was unhandled by user code
Cannot access a closed file.
When you write a Web Application you shall never use hard coded paths, and the last place where you should save files is C:\Users !! It does not matter whether this is Azure or not. It is general rule for any kind of web applications!
In your case I suggest that you create a folder within your application named pdf or something like that and save files there with the following code:
var fileName = Server.MapPath("~/pdf") + filename;
using (var output = File.Create(fileName) )
{
// do what you want with that stream
// usually generate the file and send to the end user
}
However there is even more efficient way. Use the Response.OutputStream and write the resulted PDF directly to the response. Will save you a lot of space on the local server, and the logic to delete unused generated files.
Hi I seem to be having a problem when uploading images in asp.net.When I tryed to upload an Image I get this error:
Access to the path 'D:\Projects IDE\Visual Studio\MyWork\Websites\Forum\Images\avatar\userAvatars\aleczandru' is denied.
I have set application pools Identoty to NETWORKSERVICE ando also added the NETWORK SERVICE account to the Images folder with full permision but I still get the same error.
This is my code:
private void addImageToApp()
{
string path = "~/Images/avatar/userAvatars/" + User.Identity.Name;
createPath(path);
if( Directory.Exists(HostingEnvironment.MapPath(path)))
{
//try {
UploadImage.SaveAs(HostingEnvironment.MapPath(path));
// MultiViewIndex.ActiveViewIndex = 0;
//}catch(Exception ex)
//{
// AvatarDetails.Text = ex.Message;
//}
}
}
private void createPath(string path)
{
string activeDir = HostingEnvironment.MapPath("~/Images/avatar/userAvatars");
if( !Directory.Exists(Server.MapPath(path)) )
{
string newPath = Path.Combine(activeDir, User.Identity.Name);
Directory.CreateDirectory(newPath);
}
}
What else can I do to solve this problem?
EDIT
Hi at this point I have full permision control to the following USERS:
Authetificated Users
IUSR
SYSTEM
NETWORK SERVICE
IIS_WPG
Administrator
USers
Is it posible that I need to set any configuration to IIS in order for this to work?
EDIT
I have messed around with SQL-SERVER for the last couple of days in order to make this work so I might have missconfigured something form what I understand NETWORK SERVICE is stored in SQL-SERVER master.db database.I seem to be having two network service logins may this be the problem?I remember when I first checked it I had none now I have two:
EDIT
This is the print with the permisions I added to the folder:
EDIT : Complete error
StackTrace:
In method CreatePath you are creating folder 'D:\Projects IDE\Visual Studio\MyWork\Websites\Forum\Images\avatar\userAvatars\aleczandru'.
Then, you try to save the uploaded image with the filename 'D:\Projects IDE\Visual Studio\MyWork\Websites\Forum\Images\avatar\userAvatars\aleczandru'.
You can't have a folder and a file with the same name. If you try to do this, the OS will tell you access is denied.
I suppose you want to either create a filename inside folder aleczandru, or you meant to save the file as aleczandru.png or something in folder userAvatars.
Assuming your UploadImage is a FileUpload control, you can save the file to the user's folder using the original file name of the uploaded file.
UploadImage.SaveAs(HostingEnvironment.MapPath(
Path.Combine(path, UploadImage.FileName)));
Pls make sure you have full filename with file extention in you path.
Ok... I have done this before for a project to implement a PUT method for http. I dont clearly remember it.. but some hints... if I were in my office I could tell you correctly. here are the hints
You need to add IIS_IUSRS to have access to the folder in windows.
Go to IIS admin console click the deployed site node, and set the permission for the same folder/website requests coming in... I dont remember the which category was it.. that settings pane will allow you to add/modify permissions for POST, GET and other verbs for that matter... when you edit that, you should see options for Administrator, a particular user account, anonymous etc.
may be I will write back tomorrow... exactly how to do it :-)
Try to give the group called users the permission to modify this directory (under security)
You need to find out what user the asp.net upload page is running under. If you haven't changed it, and are not running under impersonation, it should default to the ASPNET user on the local machine. Whatever it turns out to be, give that user read/write permissions on the folder.