mirror of
https://github.com/davisking/dlib.git
synced 2024-11-01 10:14:53 +08:00
94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
|
|
/*
|
|
|
|
This is an example illustrating the use of the sockets,
|
|
server and sockstreambuf components from the dlib C++ Library.
|
|
|
|
This is a simple echo server. It listens on port 1234 for incoming
|
|
connections and just echos back any text it receives but in upper case.
|
|
So basically it is the same as the other sockets example except it
|
|
uses stream buffers.
|
|
|
|
To test it out you can just open a command prompt and type:
|
|
telnet localhost 1234
|
|
|
|
Then you can type away.
|
|
|
|
|
|
Also note that a good reference on the standard C++ iostream library can be
|
|
found at http://www.cplusplus.com/ref/iostream/
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include "dlib/sockets.h"
|
|
#include "dlib/server.h"
|
|
#include "dlib/sockstreambuf.h"
|
|
#include <iostream>
|
|
|
|
using namespace dlib;
|
|
using namespace std;
|
|
|
|
|
|
|
|
class serv : public server::kernel_1a_c
|
|
{
|
|
|
|
void on_connect (
|
|
connection& con
|
|
)
|
|
{
|
|
// create a sockstreambuf that reads/writes on our connection. I'm using the
|
|
// kernel_2a version here because it is generally the faster of the two versions in the
|
|
// library.
|
|
sockstreambuf::kernel_2a buf(&con);
|
|
|
|
// Now we make an iostream object that reads/writes to our streambuffer. A lot of people
|
|
// don't seem to know that the C++ iostreams are as powerful as they are. So what I'm doing
|
|
// here isn't anything special and is totally portable. You will be able to use this stream
|
|
// object just as you would any iostream from the standard library.
|
|
iostream stream(&buf);
|
|
|
|
// This command causes our stream to flush its output buffers whenever you ask it for more
|
|
// data.
|
|
stream.tie(&stream);
|
|
|
|
char ch;
|
|
// Loop until we hit the end of the stream. This happens when the connection terminates.
|
|
while (stream.peek() != EOF)
|
|
{
|
|
// get the next character from the client
|
|
ch = stream.get();
|
|
|
|
// now echo it back to them
|
|
stream << (char)toupper(ch);
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
|
|
int main()
|
|
{
|
|
try
|
|
{
|
|
serv our_server;
|
|
|
|
// set up the server object we have made
|
|
our_server.set_listening_port(1234);
|
|
our_server.set_max_connections(1000);
|
|
// Tell the server to begin accepting connections.
|
|
our_server.start_async();
|
|
|
|
cout << "Press enter to end this program" << endl;
|
|
cin.get();
|
|
}
|
|
catch (exception& e)
|
|
{
|
|
cout << e.what() << endl;
|
|
}
|
|
}
|
|
|
|
|