I have a web server on a Pi with a Pi Camera. The goal is to click a button on a web page and have the camera take a picture and save it through a script in /usr/lib/cgi-bin/. Then I want to retrieve all of the pictures via ftp. This works, but I don't think I set up the permissions well. I gave www-data write access to a folder in the pi user's home directory, so it can save the pictures.
While this works, it seems sloppy and insecure. Should I be saving the files in a different location? I would still need to access them via ftp.
Thanks for the help.
/var/lib/$progname is usually a good place to save data by (system) programs. You could also choose the webserver's directory, e.g. /var/www/... (depending on your configuration and version in place).
Related
I need to upload a file to OneDrive, via the command line. This will be done through a batch file which is distributed to end users.
From searching on Stack Overflow, I find questions like this one which say that you need to register an app and create an app password, using Azure. I don't have the necessary permissions to do this in the organization where I work, nor can I do anything that requires an admin account. So I can't any install software - I have to use what comes with Windows 10. I can't use VBA either as that's blocked.
I've managed to download files from OneDrive without anything like that, using the process described here:
Open the URL in either of the browser.
Open Developer options using Ctrl+Shift+I.
Go to Network tab.
Now click on download. Saving file isn’t required. We only need the network activity while browser requests the file from the server.
A new entry will appear which would look like “download.aspx?…”.
Right click on that and Copy → Copy as cURL.
Paste the copied content directly in the terminal and append ‘--output file.extension’ to save the content in file.extension since
terminal isn’t capable of showing binary data.
Example:
curl https://xyz.sharepoint.com/personal/someting/_layouts/15/download.aspx?UniqueId=cefb6082%2D696e%2D4f23%2D8c7a%2
…. some long text ….
cCtHR3NuTy82bWFtN1JBRXNlV2ZmekZOdWp3cFRsNTdJdjE2c2syZmxQamhGWnMwdkFBeXZlNWx2UkxDTkJic2hycGNGazVSTnJGUnY1Y1d0WjF5SDJMWHBqTjRmcUNUUWJxVnZYb1JjRG1WbEtjK0VIVWx2clBDQWNyZldid1R3PT08L1NQPg==;
cucg=1’ --compressed --output file.extension
I tried to do something similar after clicking 'upload' on the browser, but didn't find anything useful when trying to filter the requests.
I found these two questions but there is no keyboard shortcut to upload, AFAICT. Also the end user will be uploading a file to a folder I've shared with them from my OneDrive. Opening Chrome or Edge as a minimised window is fine, but I can't just shove a window in their face which automatically clicks on things - they won't like that.
It's just occurred to me that I might be able to use an office application to Save As the file to the necessary onedrive folder, where the keyboard shortcuts are pretty stable, but have no idea how to achieve that via the command line.
The best and more secure way to accomplish this goal I think is going to be with the Rest API for OneDrive.
(Small Files <4MB)
https://learn.microsoft.com/en-us/onedrive/developer/rest-api/api/driveitem_put_content?view=odsp-graph-online
(Large files)
https://learn.microsoft.com/en-us/onedrive/developer/rest-api/api/driveitem_createuploadsession?view=odsp-graph-online
You still need a Azure AD App Registration (which your admin should be able to configure for you), to provide API access to services in Azure. Coding with the API is going to be far easier and less complicated, not to mention more versatile.
I would like to add a link to a local file in confluence. Obviously this link would only work if the file is locally on the users computer. I understand that.
If I add the address like this :
file:///D:/dev/ngs-frontend/src/pages/myPage.html
The browser sends me to :
about:blank
If I try to add it with quotes like so :
"file:///D:/dev/ngs-frontend/src/pages/myPage.html"
..confluence crashes!
How is it possible in confluence?
As you mentioned when adding the web link in Confluence specifying the file using the file protocol (file:///) you might face the issue that it doesn't work.
Obviously this link would only work if the file is locally on the users computer.
This is not entirely true. If you open the developer tools you most likely will be getting the error "Not allowed to load local resource"
As measure of security the browser won't let you access files from a different origin, specially from the users computer (this would be a serious security risk). Only imagine if you could access the files in the Windows directory from the browser, you could break apart the operating system in no time (or steal user data).
This is explained in here
If you put the file in the same server Confluence is running, then this should work just fine. However I believe you can save time just adding the page as an attachment and loading it (Confluence is pretty decent at version controlling in case you want to modify the html file).
Hope this helps!
I accomplished writing an application code in Matlab. I create a .mat file and save data into it somewhere in the code. I converted it to a standalone application file.(exe) However, I don't want to give permission to the user to see and modify this .mat file because the application uses that file in the next executions. For this reason, I changed the permission settings by right clicking the folder and:
properties-Security-Advanced-Changed Permission
However, after changing the permission, the code cannot reach that file and fails while executing. How can I handle it?
To my opinion you are approaching this the wong way. To make that concept working, your application would require higher permissions than the user has, especially the user may not modify permissions. For the majority of self-administrated PCs this is impossible, because the primary user has full administrative rights, allowing to modify folder permissions.
For such cases the typical solution is encryption. Assume everyone can access your files, store only encrypted files to the hard drive.
My Requirements
Implement MCImageManager so that users can upload images to a
"centralized" folder
Allow users to select an imagae on the centralized "ImageLibrary" and place it on a web page or blog post
IMPORTANT:
There's one challange that I need to find a solution for. Typically images are placed in a folder that exists in the website e.g. ~/Images or ~/Content/Images
The challange we have is that I will be having, however web pages will be displayed through separate websites. More specifically, in a typical scenario, a user would upload an image through MCIMageManager that places the file in a folder in the web application. So the image may be uploaded to a folder like D:\xyz\ImageLibrary.
However, the root folder may be F:\ on an entirely different server.
Therefore we need to come up with a way to share image folders between two websites so that regardless of where the image folder may be, the image will display correctly both on xyz web site management module AND the actual website.
Regards
Abhishek
For this use case you should mount the upload directory of server A to the upload directory of server B.
How do you distribute other files needed by your application that aren't in a jar file? For example, the application at http://www.javabeginner.com/java-swing/java-swing-shuffle-game . The download contains Shuffle.jar, Shuffle.bat, Score.dat, and an images folder with 3 images in it. I can see possibly putting the images directly in Shuffle.jar, but you wouldn't want to put Score.dat in the jar file because it changes. Is there somewhere you could identify this type of file in the jnlp?
The non-java files should be stored as resources. For files that change, you store the original or template file also as a resource in your jar. When the program starts, you have it check the local system to see if that file exists. If not, it creates the local file by copying the template file from the JAR resource. If the file already exists, then it is used as is.
To save files to the local system, even when running in the sandbox (unsigned), you can use the PersistenceService (javadoc / example). If your java application is signed, then you can use the regular File apis to write the file to the local machine, such as in a ".yourgame" subfolder under the user's home folder.
You can put all those files (except the scores file) in your jar file and load the contents using resource loading.
I've just deleted and restarted my reply twice now, changing my answer each time; this is confusing and needs a bit more clarification.
Are you SURE that application is supposed to be a Web Start app? On the site you linked to, it doesn't appear to be. Are you trying to take an application that was not designed as a Web Start application and change it into one that can be Web Start?
If it's not a Web Start app as your tag implies, then this question is open ended. You can distribute it 100 different ways.
If you are indeed trying to convert it into a Web Start app, you can start by packaging the images into the jar and that will alleviate your first headache if you just read them from there instead of from a File(). If it's going to be Web Start, then you need to decide how you want to keep scores. You have to decide what the scoring system is like before you can decide on how to go about it; will all the scores be kept on the web site hosting the Web Start app? Will that part still be local? If you want to get access to the local file system, you need to sign the jar, then you can extract the score.dat to the file system and do whatever you want with it if the end user accepts.
You need to figure out what you want to do before you can do it, or at least clear it up for us if you already know more than we know you know.