How to copy a file in C/C++ with libssh and sftp

Question

I\'m posting here because I need help with some code relating with libssh.

I read all the official documentation here but still I don\'t understand

Answer 1

Open the file in the usual way (using C++'s fstream or C's stdio.h), read its contents to a buffer, and pass the buffer to sftp_write.

Something like this:

ifstream fin("file.doc", ios::binary);
if (fin) {
  fin.seekg(0, ios::end);
  ios::pos_type bufsize = fin.tellg();   // get file size in bytes
  fin.seekg(0);                          // rewind to beginning of file

  std::vector buf(bufsize);        // allocate buffer
  fin.read(buf.data(), bufsize);         // read file contents into buffer

  sftp_write(file, buf.data(), bufsize); // write buffer to remote file
}

Note that this is a very simple implementation. You should probably open the remote file in append mode, then write the data in chunks instead of sending single huge blob of data.