编写简单http服务器(C语言)

2019-03-22  本文已影响0人  奋斗live

环境 : 腾讯云 centos7.2
以下是写的简单http服务器

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


int main(int argc, char *argv[])
{
    int server_sockfd;
    int client_sockfd;
    int len,pid;
    struct sockaddr_in server_addr;   
    struct sockaddr_in remote_addr; 
    int sin_size;
    char buf[BUFSIZ];  
    memset(&server_addr, 0, sizeof(server_addr)); 
    server_addr.sin_family = AF_INET; 
    server_addr.sin_addr.s_addr = INADDR_ANY; 
   //用8000端口进行监听(注意开启服务器的防火墙,若是腾讯云或阿里云,注意加入安全组)
    server_addr.sin_port = htons(8000); 

    if((server_sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        printf("socket failed\n");
        exit(0);
    }
    
    if (bind(server_sockfd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) < 0)
    {
        printf("bind failed\n");
        exit(0);
    }

 
    listen(server_sockfd, 5);
    sin_size = sizeof(struct sockaddr_in);
   
    for(;;)
    {
        client_sockfd = accept(server_sockfd, (struct sockaddr *) &remote_addr, &sin_size);
       
        if (client_sockfd < 0)
            error("failed on accept");
        //创建子进程
        pid = fork();
        if (pid < 0){
            error("failed on fork");
        }
        if (pid == 0)//子进程
        {
            //由子进程为到来的连接提供服务
            close(server_sockfd);
           // 头部
            char header[] = "HTTP/1.0 200 OK\r\n\r\n";
            char html[] = "<!DOCTYPE html><html><head></head><body><h1>This is server_</h1></body></html>";
            recv(client_sockfd, buf, BUFSIZ, 0);
            printf("%s\n", buf);
            send(client_sockfd,header,strlen(header),0);
            send(client_sockfd, html, strlen(html), 0);
           
            close(client_sockfd);//这里可关可不关,因为下面的exit退出自然会关掉连接套接字
            exit(0);
        }
        close(client_sockfd);//父进程中一定要关闭连接套接字
    } 
    close(server_sockfd);
    return 0;
}

浏览器如下


image.png

服务器输出如下


image.png
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