Question from a newcomer to QT: when I supply the exists() method of a QFileInfo object with a shared-drive file path, it always returns false, even with me escaping every backslash with another backslash (i.e. \\10.1.2.34.56\dir1). And yes, the directory does exist :) Could there be some other issue at work here, such as a lack of permission for the directory in question? Thanks in advance for any light you might shed on this issue...
It seems it works correctly on XP (with Qt 4.7.3) either with doubled backslashes or single slashes ('//ip/share/filepath').
Try getting the file url through QFileDialog::getOpenFileName. As it uses a native dialog, it should ask for your login/password if needed.
If QFileInfo can then find that the file exists, you could try using the native API (Windows Networking) to connect or allow access programmatically to the network share.
As it turns out, my issue had everything to do with permissions and nothing to do with escaping backslashes.
The application I inherited actually has two components: i) the window that provides the GUI interface for the app and (ii) the Window service that does the actual work. The window was able to "see" the shared drive because the Windows userid for which it was running had permission for that drive, whereas the Windows service running as the local system could not. Once I used the Services window to change the service to run under a userid with permission for that drive, then it ran just fine. Thanks for your response...
Related
I am on Windows 10. I want to write a function (in R) to copy the files stored in a camera (actually in the SD of the camera, but I cannot just read the memory card in the PC), to a different storage unit (say, the pc or an external HDD).
The camera is connected to the PC via an USB cable.
The problem I am facing is that, when opening the File Explorer, the camera is showing up as a link under "This PC" with no letter to indicate the drive (e.g., 'G:/').
While I can see the files using the file explorer window, I cannot find a way to get to those file from a cli type of interface (e.g., the command prompt, or the R console).
Googling, I found that 'This PC' is not a folder but rather a link to something in the registry called CLSID for which the identifier should be {20D04FE0-3AEA-1069-A2D8-08002B30309D}. However this is very confusing to me and I cannot figure out how to use this information.
Is there a way to do it? And if so: how?
Please consider I do not know much of commands from prompt (way better off in R).
A CLSID is just a GUID. My computer is a implementation of IShellFolder.
My Computer is part of the shell namespace. Several entries in the shell namespace are virtual (Control panel, scheduled tasks etc.) and cannot be accessed with low-level file functions nor cmd.exe.
While it would be possible to develop a tool that does something like shellcopy Computer\MyCamera\*.jpg x:\backup, I'm not aware of any existing tools that do this. You might have to code it yourself.
In the old days you would call SHGetDesktopFolder to get the root and then use the returned IShellFolder to navigate but these days it is simpler to use IShellItem instead.
To do this it is crucial to understand how IShellFolder and PIDLs work. See Introduction to the Shell Namespace for more information...
I have a .netcore application which reads the log path from appSettings.json.
I want to provide the default path to be something like %HOME%/MyApp/Logs/Log.json.
My code reads and expands the environment variable using Environment.ExpandEnvironmentVariables.
Now the problem is this works on Mac but on windows %HOME% is not expanded. Rather %userprofile% works on Windows.
My question is- can you suggest me some environemt variable that will work on both the platforms? As I said it reads from json, so there is not much option for me to check the platform it's running on.
Can anyone please guide me setting up the path in rstudio, why I cant change present working directory. what if I want to save a file on desktop and pull up the file in Rstudio.
Your help is appreciated.
thanks, sandy
Some of the most common reasons I have found where setting directory was a problem with the solution
Forgot the "" marks around the path example of correct setwd("Libraries/Documents")
Working in Windows and forgot to switch the back-slash to a forward slash, examples: WRONG-> "Libraries\Documents" RIGHT->"Libraries/Documents"
There path is on a shared system where they system denies that access (we have remote folders on servers at work that cannot be addressed this way)...IT security
The directory is not actually mapped as you stated, example possibly you do not need the Libraries part or you have to expressly include another level of folders above your current address
The directory has a different name, a capital letter, a space in it or something making addressing it on your system difficult
You are actually already in the wanted directory. as joel said, try getwd() to see where it says you are.
If none of this is your problem, post the error message and your system (linux, OS10.?, Windows 7 pro) and they setwd("path_to_stuff") you are using and we can try to get to the heart of the matter better.
We have built a WebDav Service with your Engine and have a one problem when we create a new Folder or File:
The new folder / file is created successfully, but not showing in the Windows Explorer. Only if you press F5, the new folder / file is showing (and the name is already selected to be edited).
This behavior is reproducible even with a blank WebDav Solution.
We can reproduce this on Windows 7 and Windows 8 (8.1) using WebDav .NET Server 3.8 and the latest 3.9.
Is there a way to get around this “refresh-problem”?
I solved this issue but clicking in the folder explorer at view > options > then i restored to default and everything is back to normal.
I assume this issue is in Windows Explorer on a single computer. Most likely the WebDAV server-side code is failing with with some exception. Here are some ideas how to detect what is wrong:
Unmount network connections executing 'net use * /DELETE' in a command prompt, this will unmount WebDAV connections too and simulate 'clean' environment.
Retry reproducing the issue and examine your WebDAV logfile. By default it is located in /App_Data/WebDAV/Logs/ folder. Are there any exceptions in it?
Use Fiddler tool or any other debugging proxy to capture and examine HTTP requests. Are there any failed requests?
In case you are creating a folder/file on one computer using Windows Explorer (Microsoft Mini-redirector driver) or IT Hit Ajax File Browser and expect the files list to refresh automatically on another computer this would not work. Mini-redirector does not support any notifications from server and WebDAV does not submit any notifications, you need to refresh the files list manually to see the new items created.
I found this video on Youtube that explains in very much detail how to fix this problem: https://www.youtube.com/watch?v=UUiCPsQquqc
It is a bit lengthy, so I'll just quickly sum it up here:
The reason for these problems are one or more (broken) Shell Extensions that prevent the refresh of the Windows Explorer
To fix it, open up regedit.exe (requires admin privileges), do a search for the Registry Key "DontRefresh". If it is "1", set it to "0". There might be multiple matches for that Key, so repeat until all Keys have the value "0".
This might not work immediately, you may have to kill and restart your explorer.exe process (easiest to do with the Task Manager). Or you can simply reboot your computer. In my case, it worked immediately.
According to the video, the Keys should only be located under HKEY_CLASSES_ROOT/CLSID, but in my case I could only find such Keys in HKEY_LOCAL_MACHINE/Classes/Wow6432Node/CLSID.
I figured it makes most sense to simply search the complete Registry, it does not take very long.
I tred a lot of hacks, from scanning the system, to recreating the profile to hacking Registry keys and hives.
Finally what worked for me -
Right click on desktop
Select Personalize
Click Themes
Click Change desktop icons
Click Restore default & OK
And instantly it began to auto refresh with a new folder, rename, delete, copy, etc.
SHORT VERSION: I have a Flex app that uses Salesforce.com's API. I am trying to deploy it to a remote server but keep getting "Error during login process." when I try to have it log in to salesforce's servers. What gives?
LONG VERSION (maybe someone finds this useful later): I have a flex application that's an add-on for salesforce.com
If I upload it as a static file to salesforce and then embed it in a visualforce page, it works fine. This method uses "loginBySessionId" rather than loginByCredentials.
I would like to be able to run it outside of salesforce's servers. IE, I would like to host the app on my own server and have people enter their credentials in the app and have it login to salesforce's servers. This way, if someone wants to try my application, they do not have to be salesforce administrators and do not have to install the app into a visualforce page.
Here's where the trouble is. If I enter my login information and run it from the compiler, it connects and loads the right data. If I export it as a production release, it still runs fine. However, if I either upload the release files to my own server, or if I transfer them to another computer and run them locally, i get an "Error during login process" Seems some others have had similar issues, but no solutions and nothing new.
Weirder still, if I transfer the project files to another computer and recompile them, it suddenly works. So basically, seems like I have to recompile the app for each computer I plan on running it on, but that's not practical. Even still, I don't see how that could possibly be making a difference, compiling on one vs the other. And yes, same versions of flash, same versions of Flex.
Does anyone have any suggestions on how to resolve this? Am I just misunderstanding something with how to deploy flex applications or is this some screwy thing with the salesforce API and there's a workaround?
As one added thing that makes this problem particularly frustrating is that I can't use the debugger because if I compile it on another computer, it works, so in order for me to get the error I have to build, then transfer to another computer. I feel like this could be a key to the problem, but I'm not sure how.
Here is some applicable code, pretty basic:
<flexforforce:F3WebApplication
id="app" statusChanged="statusChangedHandler(event)"
loginComplete="loginCompleteHandler(event)"
loginFailed="loginFailedHandler(event)"
sessionExpired="sessionExpiredHandler(event)"
serverUrl="http://na9.salesforce.com/services/Soap/u/19.0"
requiredTypes="Account,Contact,Opportunity,Lead,Task,User" />
protected function loginClickHandler( event : MouseEvent ) : void {
_username = 'LOGIN#LOGIN.COM';
_password = 'PASSWORD+SECURITY_TOKEN';
CursorManager.setBusyCursor();
app.loginByCredentials( _username, _password );
}
To clarify, you probably need something like this on initialization :
flash.system.Security.loadPolicyFile("http://na9.salesforce.com/services/Soap/crossdomain.xml");
The reason it works when you compile it is that a lot of the default security is not applicable when on same machine as compiled. Heck, you can even access the hard drive in paths (like a relative URL path to an image on the hard drive) - try running the swf on another computer and bam- no go.
This is an excellent indicator you're hitting a player / VM security issue :)