I have a program that uploads .txt or .rje files from a folder. Now when you put any other file format into the folder, like .jar, then the application crashes.
Now I cannot change the mechanics of the application, so I would like to know if there is a type of program/script that I can use that monitors the folder for any files that are non-txt/rje and then move them out of the folder once they are put there...
Is this possible using a script? (I do not want to use a .exe application to do this...not allowed to install 3rd party software onto the server this folder exists...)
Thank you
Your solution won't work as you have a race condition between the program doing the upload and the one doing the deletion. If upload runs first it still crashes.
The correct solution is to modify the upload program to cope with this scenario.
If that is not possible then the only safe work around would be to use a new folder to drop the files in, have a script run that constantly scans the folder and if a new file appears either move it to the processing folder or deletes it as appropriate.
(For the actual detection that's not my area of expertise but the simplest would be to have a bat file that just runs periodically (or even just runs once and loops with a wait, check, move, wait, check, move, etc) and processes everything in the folder when it runs).
Related
I have a single command line windows executable that has many options built into this exe file.
Eg:
(It can take screenshot)
ToolGo.exe printscreen c:\temp\filename.jpg yyyymmdd
(It can show up)
ToolGo.exe showIP machineA
I want to write another command line application, possibly in .net , where it can embed/build a wrapper around this ToolGo.exe file into my application without the user be able to use the ToolGo.exe, and also users can only access one function of this main exe file.
In the example I want this other tool to access only the print screen function in this new exe file.
The new application will have this:
Tool2go.exe printscreen c:\temp\filename.jpg yyyymmdd
But if someone types the following, it will not work:
Tool2go.exe showIP machineA
Or
ToolGo.exe showIP machineA
Any ideas how I can write this code to do this in a .net command line application?
This is a multi-part question, so I'll just give the main part of the issue as the answer with suggestions on handling the rest.
You can embed a .exe into your program by clicking on Properties and navigating the the Resources section, and adding that .exe to it.
After that, it's just a matter of extracting it locally so you can pass your commands to it, and handle it's responses. (I'm not really aware of any way to do so w/out first extracting the. exe; the .exe itself needs to run somehow after all).
To extract the embedded .exe, you do this:
' Extract the MyProgram resource (i.e. your .exe)
Dim b() As Byte = My.Resources.MyProgram
' Write it to the user's Temp folder
File.WriteAllBytes(Environment.ExpandEnvironmentVariables("%TEMP%\MyProgram.exe"), b)
By extracting it to the user's Temp folder, you can pass it your commands, and since it's 'out of sight' the user probably won't even know it's there to directly use it themselves, unless they're a bit more advanced and visit their Temp folder often. You can slightly help to avoid this, but extracting the .exe when your program starts, and then deleting it when it exits, so it only exists on the user's system while your program is running.
As far as what the user can and cannot type in order to pass to the program, you can simply handle the filtering with your program; since your program is the one passing the commands to the .exe, just don't pass any commands that you don't allowed, and pass the ones you do want allowed.
So we have a client that creates "training packages" and then uploads them via ftp to their website. They create the training packages in PowerPoint, and then use some program to convert them into html/swf files and package them within a folder. When they upload, they use Filezilla, and just transfer the entire folder over. The folder is uniquely named, uses no spaces or special characters.
These files have uploaded fine for about a year. Recently, they've run into a problem. Whenever they try to upload training package folder, they are immediately presented with the "This file already exists, do you want to overwrite?" message. Except... the folder they're moving is brand new, and the file it's asking to overwrite DOESN'T EXIST. When they choose "Overwrite" the file looks like it transfers, but the file size is wrong, and the training package doesn't work correctly.
This happens with every training package they try to upload. It's not just a badly outputted package. Also, it's always the same file that has the problem--it's the main "player" for the training package, and though it contains different content for every package, it is the same file name (cplayer.swf) every time.
Things they've tried without success:
-Re-uploading the file again by itself, and overwriting
-Deleting the "bad" file and re-uploading the single file - Get the overwrite message again, even though the file DOES NOT EXIST.
-Renaming the file on the server and re-uploading the single file - Get the overwrite message.
-Renaming the single file locally within the package and uploading/renaming it - Won't let us rename because the file already exists.
-Used another FTP client - Same results as above, so not a client specific problem.
-Used a different FTP login - Same results as above, so not a permissions problem.
Other things of note:
-The file is small--it's not a time out problem. Plus, all other files upload fine, and some are a lot larger.
-They've emailed this file to me, and I've uploaded it successfully.
I am completely at my wits end. Does anyone have any ideas where I can at least troubleshoot a little further?
Thanks for the non-help, the downvote, and the general lack of response on what was a pretty serious issue for me.
In case anyone else has a similar problem, here's what was going on:
Virus software (specifically Malware Bytes) was blocking THIS ONE SINGLE FILE. All I had to do was exclude the folder that contained the file.
I am attempting to make an instructional app for the call canter that I work at. Part of the code allows users to display information through the use of several files in our directory with drop down combo boxes.
For instance, a small portion of the code is similar to this (I did not save the app and bring it home so I am going off memory):
If cboGlossaryTerm.SelectedItem("MSN")Then
Process.Start("S:\MSN.pdf")
End If
I put the pdf files in My Resources and the Word files are added under the Solution folder.
I am using filepaths in the code as well.
(I attempted to save the pdf files in the Solutions folder but the pdf was not compatible.
With me adding the files this way, will users who do not have access to the S drive folder be able to display the files? Also, will the files remain accessible in the program if they are deleted from the S drive? If not, how should I be referencing the files in my project? Do I have to reference the pdf files from My Resources? If so, how do I do that in an If-Then statement similar to the one above?
from what you have there it doesn't look like the pdfs in the S:\ would be available to anyone who doesn't have the drive mapped on their local machine.
as for if the files are deleted, if they are being loaded from the S:\ then when they are deleted from there the program will not be able to find them to load them.
if the program is being installed on the local machines you might want to look at just including the pdfs in the installer and accessing them through the program files path.
Source code: vb.net
We are using File.Move() method to move the file from source to destination locaion.
But the destination location is being monitored by one tool, whenever we are moving files to the destination location, it will pick up the file and process it. The issue here when we try to move huge volume file like around 5GB file, the tool is immediately picking up the file and try to process it before the move operation is complete and send failure notice to all the users.. After again successfully moving the file completely, it picks up the same and process it sucessfully this time and send successful notice this time.
We can't have control over the tool which is monitoring the destination folder because it is a third party tool. However we want to find out the alternative option to place a lock over the destination foler like ReadWrite access till the move operation completes so that 3rd party will not be able to pick up or try to access that file.
Pls help us.
Not sure if it works, but you might be able to make the following work with directories as well:
FileOpen(1, "c:\file.ext", OpenMode.Binary)
Lock(1)
'Do something with file here
Unlock(1)
FileClose(1)
Reference and example here
I hope it helps.
First, I agree with #hometoast, sometimes tools like this just look for specific file extensions so you can copy in with a different file extension and then rename.
But barring that, download the file to a temp location and then Move the file into the dir getting watched. A Move does not recopy the file contents but just updates its pointers in the filesystem. Should be atomic.
Remote clients will upload images (and perhaps some instructional files in specially formatted text) to a "drop folder." Once the upload is complete we need to begin processing these images. It would be an easy, but flawed, solution to just have a script automatically begin processing any files in the folder every few seconds (the files can be move out of the folder once processed); but problems would arise when attempting to process large images which are only partially transfered.
What are some tricks I can use to ensure the files are fully uploaded before processing them?
A few of my own thoughts:
The script can check the validity of the file; ie, a partial jpeg would result in an error and you could respond to that error in the script, this would be fairly CPU intensive though. Some files have special markers on the end, but I can't count on this, I'm not sure what formats I'll be dealing with.
I've heard of "file handles" but haven't really figured out the basics of what they are and how I can tell if there is a "file handle" on a particular file. Basically the FTP daemon (actually, I'm on Windows, so "service") would keep a "handle" on the file while it's being uploaded and you would know not to process that file. These are just a few of my thoughts but I'm not really sure if they will work or if there are better or more accepted ways of solving this problem.
If you have an server-side script upload system (PHP, ASP, JSP, whatever), you could instruct the script to call another script to process the files, or to create a flag-file indicating the upload is done, something like this.
If your server is Linux-based, you can use lsof to check if the file is open. As your ftp/script/cgi will close the file after upload completes, lsof will not show the file in the list.
If your server is Windows-based, you can use Process Explorer to list the open files.
By what method are your users uploading the images?