简单http服务器

#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/stat.h>
#include <fcntl.h>

#if 1
#define IPADDR "127.0.0.1"    //本地服务器地址
#define PORT 7000            //本地服务器端口
#else
#define IPADDR "47.106.98.190"    //服务器地址
#define PORT 80        //服务器端口
#endif  

#define BUFFER_SIZE 4096

int main()
{
    // char buf[1024] = "<html>"
    //                  "<head>"
    //                  "<title>"
    //                  "aaa"
    //                  "</title>"
    //                  "</head>"
    //                  "<body>"
    //                  "<p>"
    //                  "test p"
    //                  "</p>"
    //                  "</body>"
    //                  "</html>";
    char buf[1024];
    int sockfd, client_sockfd;
    struct sockaddr_in servaddr, clientaddr;
    char send_buf[BUFFER_SIZE], recv_buf[BUFFER_SIZE];

    //初始化网络连接结构体
    bzero(&servaddr,sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(PORT);
    servaddr.sin_addr.s_addr=INADDR_ANY;
    /*
    if(inet_pton(AF_INET, IPADDR, &servaddr.sin_addr) <= 0)
    {
        perror("Error: ");
        exit(0);    
    }
    */
    int fp;
    fp = open("index.html", O_RDONLY);
    read(fp, buf, sizeof(buf));
    close(fp);

    printf("buf :\n%s\n", buf);

    //创建socket
    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        perror("Error: ");
        exit(0);    
    }

    if(bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
    {
        perror("bind error");
        exit(0);
    }

    if(listen(sockfd, 5) < 0)
    {
        perror("listen error:");
        exit(0);
    }
    int sin_size;
    sin_size = sizeof(struct sockaddr_in);

    if((client_sockfd = accept(sockfd, (struct sockaddr *)&clientaddr, (socklen_t *)&sin_size)) < 0)
    {
        perror("accept error:");
        exit(0);    
    }

    printf("已成功与客户端建立了连接...\n");

    memset(recv_buf, 0, sizeof(recv_buf));
    recv(client_sockfd, recv_buf, sizeof(recv_buf) - 1, 0);
    printf("\n%s\n", recv_buf);

    memset(send_buf, 0, sizeof(send_buf));

    strcat(send_buf, "HTTP/1.0 200 OK\r\n");
    strcat(send_buf, "Server: wz simple httpd 1.0\r\n");
    strcat(send_buf, "Content-Type: text/html\r\n");
    strcat(send_buf, "\r\n");
    // strcat(send_buf, "TSET\r\n");
    // strcat(send_buf, "HTTPD\r\n");
    strcat(send_buf, buf);

    if(send(client_sockfd, send_buf, strlen(send_buf), 0) < 0)
    {
        perror("Error: ");    
        exit(0);
    }
    else
    {
        printf("send buf successful\n");
    }

    close(client_sockfd);
    close(sockfd);

    return 0;    
}