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Closed 10 years ago.
I want to write a program for transferring files and documents between a network computers. Many files may have been transferring at moment. every computer can receive and send files, it means system have to be ready to send files and listening to receive files.
I can configure program on each system as i want (for example give a list of connected computers' ip to program to choose target system for transfer file into)
Do i have to make Server-Client type applications or i can have JUST one program running on computers? I know question is vast but helping me to choose the best way will be appreciated.
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I want to write this program by Delphi 2010 and network computers os is Windows 7.
You can do it peer-to-peer. The very same program can both listen for requests to transfer or receive files from other computers and issue its own requests to transfer or receive files to other computers.
Related
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Closed 10 years ago.
What options do we have to enable a user of an app to share a file with another user on another device ?
My application is a task management app, I want to enable my users to share lists, notes, etc.
I haven't found a way to do this with iCloud.
Depending on how you want to implement the work-flow, there are a number of ways to accomplish this.
Spotify allows users to sync files between computers and mobile devices, if both are on the same local network. You could use Bonjour to discover if there are any valid endpoints on the local network, and then sync directly over a TCP/IP socket.
If you're looking for cloud sync, Parse provides a cloud-app-api service that lets you easily store objects, including files and binary data on the cloud. You'll have to write your own user management layer, but they provide API's for storing and retrieving data.
From the comments, there are other companies that provide similar services to parse: Buddy, Stackmob, Kinvey, and applicasa to name a few. The idea is to leverage an API-as-a-Service provider for all backend needs.
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Closed 10 years ago.
I want to learn device driver development so how to start ? Any media for beginner or something ?
The canonical reference is Linux Device Drivers 3rd Edition - although it's a few years old now, it's close enough to current kernels.
Quite a lot of stuff is not covered in here - particularly anything that's device or bus specific, or the way the kernel has been developing to support ARM SoC devices over the last few years.
I would suggest to go start learing Linux device driver under PC environment so as you can co-relate most of things you are familier with ,One approach is to go get linux source code and try to understand how kernel is being called and how single user space process is initiated from kernel space .You can also follow this below given page would be helpful for you.
http://en.wikiversity.org/wiki/Reading_the_Linux_Kernel_Sources
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Closed 10 years ago.
I hope there is someone that can help me.
I am writing a software that users can fill in information into a database, but I want to install that same software that I created on multiple computers. When a other user is inserting new information into the software and click save then it must show on his/her computer and at the same time on the other PC's in the network.
I think this is a difficult one to crack, but I hope some one can help me.
Greetings
There are many ways to solve this. I recommend to use a server-side application (installed on the database server system for example) which receives a notification from the inserting app. Then, the server side app will send either a UDP broadcast or use a TCP connection to the clients to notify them.
The clients then just need to listen for server messages in a background thread. The messages will be 'pushed' from the server to the client.
An example which can be used as a starting point is the Indy Telnet client component which has a listener thread for server messages. You do not have to open the client firewall for incoming connections to work this way.
There are also complete messaging solutions available, but maybe they would be to heavyweight for your requirements. If you like, I can provide some links.
I would not recommend
database polling (too expensive and unflexible)
database events (run in the server process, could block operation or crash)
A standard which can be used for this messaging system is WebSocket. There are commercial and open source Delphi implementations for the client and server side.
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Closed 9 years ago.
I want to implement a Web Service that will allow users to store arbitrary data in my home computer and execute arbitrary batch programs to manipulate said data. In order to keep things simple, so I will not deal with priority queues and concurrent processes yet. My process request queue will be a simple FIFO queue.
So, I know how to implement Web Services, and obviously I know how to implement a FIFO queue, but I do not know how to implement a system service that runs in the background, waiting for requests. Where could I find learning resources on how to develop a Windows service?
I already know Windows development using the Windows API, MFC and even some ATL/WTL. (I also know .NET, but I do not like it very much, because it gets in the way how I design programs.) But I would rather not have to deal with COM.
Since you're developing a service on Windows and you want to use web services chances are that you will want to host your solution in IIS which is already the type of always-on, background application that you want. E.g. runs all the time regardless of login or UI.
If you use the .NET framework then your implementation will become especially easy due to all the project templates available in Visual Studio.
Here's some CodeProject tutorials:
http://www.codeproject.com/KB/WCF/WCFPart1.aspx
http://www.codeproject.com/KB/WCF/WCFWebService.aspx
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Closed 12 years ago.
Like device driver， I don't know whether there are some other drivers ?
Taken from Windows Internals 4th (XP-based) Edition:
Hardware device drivers - Drivers using the HAL
File System Drivers - File IO for devices
File System Filter Drivers - Intercept IO and do processing on it (like AV and such)
Network Redirectors and Servers - Transmit IO on the network
Protocol Drivers - Implement network protocol like TCP/IP
Kernel Streaming Filter Drivers - Signal processing on data streams like video/audio
What comes to mind straight away is virtual device drivers - usually emulating some kind of device, but not being a device themselves.
Probably worth a mention is class drivers that can talk to an entire class of devices (e.g. USB).
And the Wikipedia article on device drivers may be a good starting point.