Access to a shared folder on other computer

[Demetrio]

Can someone send me a example of how to copy a file from a remote folder to other remote folder? For example: I am running MyProgram on MyComputer and this program has to copy a file from a folder inside OtherComputer. This folder need user and password to allow MyProgram to copy the file.
I am using the following sample. The main point in this example is to make my program to work both in linux and windows, but locally. Now I want to do the same with a path like this: \\192.168.x.x\mySharedFolder\fileToBeCopied.text . Maybe I need another library but I don't know. I imagine that there will be a way to set user, password and even proxy to get a file from other computer inside a shared folder.

//***http://www.ibm.com/developerworks/aix/library/au-boostfs/
#include <stdio.h>
#include <boost/filesystem.hpp>
int main()
{
boost::filesystem::path path("/usr/local/include");
bool result = boost::filesystem::is_directory(path);
return 0;
}

[kbw]

It depends on the protocol you want to use. There is a variety of protocols for moving files from one computer to another.

[webJose]

In my limited knowledge in the Windows side, you can map a shared folder including username and password calling the function WNetAddConnection2(). You could also call CredUIPromptForCredentials() to quickly gather a username and password and use them in a call to LogonUser() that will grant you an impersonation token. Use the token to impersonate this new user and directly access the file share.

Just so it is 100% clear: I know NOTHING about Linux. :-( I cannot help out in making this portable.

[Demetrio]

Kbw and WebJose, tanks for your answers.
Kbw, can you give me an example in C++ of any protocol to move files in a windows7 and other protocol to move files in Linux? I know how to do locally but I have no idea how to do on other computer and if it's necessary, how to use a password if there is one. My program will ruin over linux but will access folders in both windows and linux.

[kev82]

Protocol choice is yours, but whatever protocol you use, you will need to run a server for it on the remote machine. Personally I would go with ssh as the protocol and libssh2 as the access library, but ftp, samba(ie CIFS), and webdav are 3 other perfectly good protocols off the top of my head.

[Demetrio]

Kev82, thanks for your answer. I am very C++ beginner. When you answered me with your personal opinion you helped me so much. Yesterday, I spent the whole day looking for a article or even better, an example how to do but I did not find it. Can you send me an example or indicate an tutorial about how to access a remote folder which need some parameters like password? I have been worked for only 4 weeks with C++ and I have been able to develop because I have been used libraries like Boost and LibCurl, which are very well explained and they make the work easier and faster. Probably it will exist some library to support what I am trying to do.

[Demetrio]

Kev82, I am sorry. I didn't note that you had already suggest me a library (libssh2). After short research about libssh2, I found some directions (http://www.libssh2.org/examples/). I will try it today. Anyway, thanks again.

[kbw]

If you want to use a name like \\192.168.x.x\mySharedFolder, then it means you're most probably using Windows and you're accessing 192.168.x.x over CFS, a Microsoft Network protocol that used to be called SMB. It's the default method for connecting Windows computers. Unix (including Apple OS X) computers can talk using this protocol using Samba, a package that implements SMB.

\\192.168.x.x\mySharedFolder uses a naming convention is called a UNC.

Because these protocols are usable implicitly from the files system, you don't need to do anything special in your program. You ought to be able to access a file \\192.168.x.x\mySharedFolder\README.TXT with:

#include <fstream>
#include <iostream>
#include <string>

int main()
{
    std::ifstream is("\\\\192.168.x.x\\mySharedFolder\\README.TXT");
    std::string line;
    while (std::getline(is, line))
        std::cout << line << std::endl;

    return 0;
}

You need double slashes because the slash character is a delimiter.