HTTP服务器基础认识(复习)

鉴于曾经写过相关文章，这里就不再详细介绍了，关于详细的介绍可以参考我之前的文章

HTTP协议初识·中篇-CSDN博客

一个简单的设置套接字的过程，也当成是复习一下下了

代码

#include <iostream>
#include <cstdio>
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>

int main()
{
    // 1.创建套接字
    int sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(socket < 0)
    {
        perror("socket error");
        return -1;
    }

    // 2.绑定套接字
    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(8085);
    addr.sin_addr.s_addr = inet_addr("0.0.0.0");
    socklen_t len = sizeof(struct sockaddr_in);
    int ret = bind(sockfd, (struct sockaddr*)&addr, len);
    if(ret < 0)
    {
        perror("bind error");
        return -1;
    }

    // 3.设置监听套接字
    ret = listen(sockfd, 5);
    if(ret < 0)
    {
        perror("listen error");
        return -1;
    }

    // 4.获取新连接
    while (1)
    {
        int newfd = accept(sockfd, nullptr, 0);
        if(newfd < 0)
        {
            perror("accept error");
            return -1;
        }

        char buf[1024] = {0};
        int ret = recv(newfd, buf, 1024, 0);
        if(ret < 0)
        {
            perror("recv error");
            close(newfd);
            continue;
        }else if (ret == 0)
        {
            perror("peer shutdown!");
            close(newfd);
            continue;
        }

        std::string body = "<html><body><h1>Hello World</h1></body></html>";
        std::string rsp = "HTTP/1.1 200 OK\r\n";
        rsp += "Content-Length: " + std::to_string(body.size()) + "\r\n";
        rsp += "Content-Type: text/html\r\n";
        rsp += "\r\n";
        rsp += body;

        ret = send(newfd, rsp.c_str(), rsp.size(), 0); // 0 阻塞式发送
        if(ret < 0)
        {
            perror("send error!");
            close(newfd);
            continue;
        }
        close(newfd);
    }
    close(sockfd);
    return 0;
}

测试成功