When I use a character chat networking library, why am I not receving the full string when writing blank spaces between words?

The code doesn't print the blank space when I type it between words in the message getline, it only prints the first word or last letter, but if I write any character like -./\_ between words, it will print the full message. For example:

-Without character:

I Write : Hi how Are you
I Receive : Hi

-With character:

I Write : How-how-Are-you?
I Receive : How-how-Are-you?

#include <iostream>
#include <SFML/Network.hpp>
using namespace std;

void server() {
    sf::TcpListener listener;
    listener.listen(5301);
    sf::TcpSocket socket;
    listener.accept(socket);
    cout << "New client connected: " << socket.getRemoteAddress() << endl;
    while(true){
        char buffer[1024];
        size_t received = 0;
        socket.receive(buffer, sizeof(buffer), received);
        cout << "Client : " << buffer << endl;
        string message;
        cout << "Enter Message  :";
        cin >> message;
        socket.send(message.c_str(), message.size() + 1);
    }
}

void client() {
    string consoleInput;
    cout << "Input server address: " << endl;
    cin >> consoleInput;
    sf::TcpSocket socket;
    socket.connect(consoleInput, 5301);
    while(true){
        string message;
        cout << ": ";
        cin >> message;
        socket.send(message.c_str(), message.size() + 1);
        char buffer[1024];
        size_t received = 0;
        socket.receive(buffer, sizeof(buffer), received);
        cout << "Server:" << buffer << endl;
    }
}

int main()
{
    cout << "Client[c] or server[s]? " << endl;
    string consoleInput;
    cin >> consoleInput;
    if (consoleInput == "c")
    {
        client();
    }
    else if (consoleInput == "s")
    {
        server();
    }
    
    return 0;
}