Send indeterminate amount of JSON strings via socket

Question

have an application cliente/servidor where the client makes a request to the server and the server makes a query to a banco de dados and then returns this data to the client in the format JSON, as I do not know how many records I have in my table thought to send each record in one send(), however in customer I am losing the data of the first send(), and the buffer of the first recv() is storing the data of send() sequent

Código do servidor:

while((row = mysql_fetch_row(res))){
    sprintf(jobj_string, "{ \"nomeUsuario\" : \"%s\", \"idUsuario\" : \"%s\" }", row[1], row[0]);
    if((send(socketNovo, jobj_string, strlen(jobj_string), 0)) == SOCKET_ERROR){
        perror("Falha ao enviar usuario");
        exit(0);
    }
}

Código do cliente:

for(;;){
    if((recv(socketServidor, jobj_string, 300, 0)) == SOCKET_ERROR){
        perror("socket recv");
        exit(0);
    }
    jobj = json_tokener_parse(jobj_string);
    if(jobj != NULL)
        json_object_object_foreach(jobj, key, val){
            /* processa o JSON */
        }
}

what the server sends:

{ "nomeUsuario" : "user1", "idUsuario" : "1" }
{ "nomeUsuario" : "user2", "idUsuario" : "2" }
{ "nomeUsuario" : "user3", "idUsuario" : "3" }
{ "nomeUsuario" : "user4", "idUsuario" : "4" }

each row being a send();

what the client’s first recv buffer stores:

: "user2", "idUsuario" : "2" }
{ "nomeUsuario" : "user3", "idUsuario" : "3" }
{ "nomeUsuario" : "user4", "idUsuario" : "4" }

or lost data from the first send(), and killed the second, I used the wireshark and verified that the server is sending the data correctly, another idea would be to send all the records in only one send(), but as I do not have how to determine quantity records exist in my bank, I run the risk of bursting the size of the buffer customer’s.

How would be the best way to send the records to the customer without knowing the size?