Linux实现一个简单的HTTP服务器-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_37941471/article/details/80789725

本文介绍了一个简易HTTP服务器的实现过程，包括使用socket编程建立服务器、监听客户端请求并响应等关键技术点。该服务器能够处理HTTP请求，并返回简单的欢迎页面。

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代码实现：

Makefile :

.PHONY:all clean
all:http_server
http_server:http_server.c                                                                                                                                         
        gcc $^ -o $@ -lpthread
clean:
        rm -rf http_server

http_server.c :

#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <pthread.h>
#include <stdlib.h>                                                                                                                                               

int startup()
{
    int sock = socket(AF_INET,SOCK_STREAM,0);
    if(sock < 0)
    {   
        exit(1);//退出进程
    }   

    int opt = 1;
    setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));

    struct sockaddr_in local;
    local.sin_family = AF_INET;
    local.sin_addr.s_addr = htonl(INADDR_ANY);
    local.sin_port = htons(8080); // 指定固定端口

    int ret = bind(sock,(struct sockaddr *)&local,sizeof(local));
    if( ret < 0 ) 
    {   
        exit(2);
    }   

    if( listen(sock,5) < 0 ) 
    {   
        exit(3);
    }   
        return sock;
}

void* handler_request(void * arg)
{
    int sock = (int)arg;
    char buf[4896];
    ssize_t s = read(sock,buf,sizeof(buf)-1);
    if( s > 0 )
    {
        buf[s] = 0;
        printf(" %s ",buf);
        const char *echo_str = "HTTP/1.0 200 ok\n\n<html><h1>Welcome to my http server!</h1><html>\n";
        write(sock,echo_str,strlen(echo_str));
    }
    close(sock);
}

int main()
{
    int listen_sock = startup();
    while(1)
    {
        struct sockaddr_in client;
        socklen_t len = sizeof(client);
        int sock = accept(listen_sock,(struct sockaddr*)&client,&len);
        if(sock < 0)
        {
            continue;
        }
        pthread_t tid;
        pthread_create(&tid,NULL,handler_request,(void *)sock);
               pthread_detach(tid);
    }
    return 0; 
}