Mini HTTP Server

Mini HTTP Server  : http://blog.daum.net/aswip/3863458

HTTP에 대한 프로토콜 정의는 RFC 2616에 정의되어 있으며,

다음 예제는 HTTP 1.1이 어떤식으로 동작하는지 설명하는 아주 가벼운 예제에 불과하다.

 

#pragma comment(lib, "ws2_32.lib")
#include <stdio.h>
#include <time.h>
#include <WINSOCK2.H>

#define STD_HTTP_PORT        80

int CreateSvrSock(int nPort)
{
    int nSvrSock = 0;
    int nRet = 0;
    auto int one = 1;
    struct sockaddr_in svrAddr;
   
    if ( (nSvrSock = socket(AF_INET, SOCK_STREAM, 0)) < 0 )
    {
        printf("Socket Create Error : %s\n", strerror(errno));
        return -1;
    }
   
    if (setsockopt(nSvrSock, SOL_SOCKET, SO_REUSEADDR, (const char *) &one, sizeof(one)) == -1)
    {
        printf("Error setting SO_REUSEADDR for socket: %s", strerror (errno));
        return -1;
    }
   
    memset(&svrAddr, 0, sizeof(svrAddr));
    svrAddr.sin_family = AF_INET;
    svrAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    svrAddr.sin_port = htons((u_short)nPort);
   
    if ( (nRet = bind(nSvrSock, (struct sockaddr*)&svrAddr, sizeof(svrAddr))) < 0 )
    {
        printf("Bind Error : %s\n", strerror(errno));
        return -1;
    }
   
    if ( listen ( nSvrSock, 5 ) < 0 )
    {
        printf("Listen Error : %s\n", strerror(errno));
        return -1;
    }
   
    return nSvrSock;
}

int main(int argc, char **argv)
{
    int nSvrSock = 0, nCliSock = 0;
    int nRecv =  0, nSend = 0;
    int nAddr = sizeof(struct sockaddr_in);

    char szBuf[1024];
    WSADATA w;
    struct sockaddr_in addr;

    WSAStartup(MAKEWORD(2, 2), &w);
    nSvrSock = CreateSvrSock(STD_HTTP_PORT);

    printf("start simple http server 127.0.0.1:%d\n", STD_HTTP_PORT);

    while ( (nCliSock = accept(nSvrSock, (struct sockaddr*)&addr, &nAddr)) > 0 )
    {
        nRecv = recv(nCliSock, szBuf, sizeof(szBuf), 0);
        szBuf[nRecv] = 0;
       
        printf("[http client request]\n");
        printf("%s\n", szBuf);
        printf("=======================================================================\n");
       
        nSend  = sprintf(&szBuf[nSend], "HTTP/1.1 200 OK\r\n");
        nSend += sprintf(&szBuf[nSend], "Date: Mon, 05 May 2008 03:19:34 GMT\r\n");
        nSend += sprintf(&szBuf[nSend], "Server: My mini http server\r\n");
        nSend += sprintf(&szBuf[nSend], "Keep-Alive: timeout=15, max=100\r\n");
        nSend += sprintf(&szBuf[nSend], "Connection: Keep-Alive\r\n");
        nSend += sprintf(&szBuf[nSend], "Content-Type: text/html\r\n");
        nSend += sprintf(&szBuf[nSend], "Content-Length: 10\r\n\r\n");
        nSend += sprintf(&szBuf[nSend], "%10ld", time(0));

        nSend = send(nCliSock, szBuf, nSend, 0);
        printf("[http server response]\n");
        printf("%s\n", szBuf);
        printf("=======================================================================\n");
        closesocket(nCliSock);
    }

    return 0;
}