HTTP기반 웹 서버의 기본 원리가 TCP/IP 위에 HTTP 프로토콜로 돌아가는 것을 보여주려고 만들어봤습니다.
#include <WS2tcpip.h>
#include <Windows.h>
#include <stdio.h>
#pragma comment(lib, "Ws2_32.lib")
#define LISTEN_PORT (50001)
#define LISTEN_IP L"0.0.0.0"
int main()
{
WSADATA wsa;
int wsa_startup_result = WSAStartup(MAKEWORD(2, 2), &wsa);
if (wsa_startup_result != 0)
{
int error = WSAGetLastError();
wprintf(L"Failed WSAStartup. code : %d", error);
return 1;
}
SOCKADDR_IN server_address;
memset(&server_address, 0, sizeof server_address);
server_address.sin_family = AF_INET;
server_address.sin_port = htons(LISTEN_PORT);
int inet_pton_result = InetPton(AF_INET, LISTEN_IP, &server_address.sin_addr);
if (inet_pton_result != 1)
{
if (inet_pton_result == 0)
{
wprintf(L"Failed InetPton. invalid IP string");
}
else
{
int error = WSAGetLastError();
wprintf(L"Failed InetPton. code : %d", error);
}
return 1;
}
SOCKET listen_socket = socket(AF_INET, SOCK_STREAM, 0);
if (listen_socket == INVALID_SOCKET)
{
int error = WSAGetLastError();
wprintf(L"Failed socket. code : %d", error);
return 1;
}
int bind_result = bind(listen_socket, (struct sockaddr*)&server_address, sizeof server_address);
if (bind_result != 0)
{
int error = WSAGetLastError();
wprintf(L"Failed bind. code : %d", error);
return 1;
}
int listen_result = listen(listen_socket, SOMAXCONN);
if (listen_result != 0)
{
int error = WSAGetLastError();
wprintf(L"Failed listen. code : %d", error);
return 1;
}
while (1)
{
SOCKADDR_IN client_address;
int client_address_size = sizeof client_address;
SOCKET connected_socket = accept(listen_socket, (struct sockaddr*)&client_address, &client_address_size);
if (connected_socket == INVALID_SOCKET)
{
int error = WSAGetLastError();
wprintf(L"Failed accept. code : %d", error);
continue;
}
char* body = "<html><body><p>Hello world</p></body></html>";
char* header = "HTTP/1.1 200 OK\nContent-Length: 45\nContent-Type: text/html\n\n";
send(connected_socket, header, strlen(header), 0);
send(connected_socket, body, strlen(body), 0);
Sleep(10);
closesocket(connected_socket);
}
return 0;
}
실행해서 브라우저에서 띄우면 이렇습니다.
다음엔 라우팅 기능도 넣어보고 그래봐야겠네요.
