I have a small linux vps. I have written a Java client application, which needs to connect and submit large string data and images. The string data will be stored as regular text files on the server, and will be parsed by another Java application that will run on the server and use this uploaded files and images.
The next part of the problem is, because this Java client will be run by several users, I need some way to uniquely identify each uploaded file to the currently logged in user session on the website (the user needs to login on the website, to be able to run the tasks). Any suggestions or more efficient patterns ?
Don't write the stuff to files. Punch the uploaded data into 'raw' database tables by user ID. The batch job job can pull the data out, parse/format/fold/spindle/mutilate, and stuff the results into the real tables, then delete the raw data.
Related
We have Java Vert.x project. We have implemented the download button in our Web Service for our users. When user clicks on download button, we would convert the huge data in our database that the user asked for, to excel file, then upload it in AWS S3 and then the URL from the S3 would be sent in response to the user's download request. But this whole method takes time (Especially generating the excel file). Everything is don in backend. Please suggest better approaches than this to implement download option in the page(User has both option to download filtered or complete data that he is accessible to).
How to access office local server files through an java swing app?
I have an Java application made using Swing. Using this app I am taking data from user and storing it in a file.
Now, currently the data stored is being stored in user's system only. Now I have a local office server, I want to dynamically add data to that file whenever users inputs some data through that app, so that whenever i want to access that file, i can see all the users data that have been input through that app.
I have searched on net, but everywhere either FTP sever or cloud is being discussed and both are not allowed. How to tackle this problem ?
What is the correct/proper way to upload files to a server? I'm only talking about small files such as images, text files, and excel/word files.
I know that I can upload images to the database using BLOB. But what about the others?
I have a table called "Ticket" which contains information such as date created, ticket number, caller, attachment, and etc.
I'm having problems on how to upload an attachment to a server.
The first option should be uploading the image to a file server and stored the file id or uuid in your ticket table, or a OneToMany table stores all attachments.
Always void using BLOB to store image binary in database. Database has this capability doesn't mean it's a good way to use it.
If you are working on a small project, you may not see the problem. If the concurrent is relatively high,
Imagine you store the files in the database, even all are just images, whenever you retrieve the tickets, the a-few-MB image will be in the memory. It's a waste of server memory.
If you are using some ORM to retrieve the list, which will be worst and your server can be easily OutOfMemory.
One more thing is that if your system has Web Application Firewall in front, it's also advisable to separate file upload with normal form submission.
I have an android application, which wants the user to login each time he runs the app. So, the login procedure is simple, using the sqlite dabase file i'm using. I've copied the file in assets folder and doing the necessary modifications. But, the database file is of no use unless it is on the server. I don't have any server so i'm thinkin of keeping the database file on dropbox, google drive etc and then read or update that file as per user commands. The question is how to do that? I was searching the web for it, and found that the only way is downloading the db file modifying it and the uploading it back. Can anyone give me an example??
Doing that isn't possible unless you have a server.
Because, if you are using dropbox, first you'll have to make your file public in order to download it (Not recommended at all. Compromises security). Then you can use the url to download the file. But you won't be able to upload it back (Unless you are able to login to dropbox through your Android code).
Instead if you a web server with MySQL n PHP, you can easily send POST requests to your server.
I converted a local application to a Java applet for data security1 but I cannot figure out how to output information to a file. I am inputting files by a URL object but do not know how to output data to a file on the server.
secure in that the person running the program in supervised conditions cannot keep it and run it for someone else (it is a survey I am piloting).
Is there an easy way to do this?
Applets run on the client, not on the server, so an applet can't do this, period. What it can do is send data to a service of some kind on your server, which can then turn around and write the data to a file.