Http服务器-第一步实现80端口服务

本文代码主要用于演示基本原理：用 C++ Winsock API 搭建一个监听 80 端口的最小 HTTP 服务器，收到请求后直接返回一个固定的 HTML 页面。

#include <iostream>
                #include <list>
                #include <string>
                #include <algorithm>
                #include <vector>
                #include <thread>
                #include <fstream>
                #include <stdlib.h>
                #include <stdio.h>
                /*
                #include <functional>
                #include "direct.h"
                #include <map>
                #include <memory>
                #include <queue>
                #include <condition_variable>
                #include <mutex>
                #include <atomic>
                
                #include <unordered_map>
                */
                
                #include "winsock.h"
                #include "stdlib.h"
                #include "stdio.h"
                #include "string.h"
                #pragma comment (lib,"wsock32")
                
                
                
                
                int main()
                {
                	WSADATA wsadata;
                	WORD wVersion = MAKEWORD(2, 0);
                	WSAStartup(wVersion, &wsadata);
                
                
                
                	int sock, length;
                	length = sizeof(sockaddr);
                
                
                	struct sockaddr_in server_ipaddr, client_ipaddr;
                	memset(&server_ipaddr, 0, length);
                	server_ipaddr.sin_family = AF_INET;
                	server_ipaddr.sin_port = htons(80);
                	server_ipaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
                
                
                	char buff[4096];
                
                	sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
                
                	::bind(sock, (sockaddr *)&server_ipaddr, length);
                
                
                	listen(sock, 100);
                
                
                
                	char *head =
                
                		"HTTP/1.0 200 OK\n"
                		"Content-Type: text/html\n\n";
                
                
                		char *html =
                			"<html><head><title>我的第一个 HTML 页面</title></head><body>"
                	 "<p>body 元素的内容会显示在浏览器中。</p>"
                	  "<p>title 元素的内容会显示在浏览器的标题栏中。</p>"
                		"</body></html>";
                
                
                	std::cout << "start server ok" << std::endl;
                	int len,sock_client;
                	while (1)
                	{
                
                		sock_client = accept(sock, (sockaddr *)&client_ipaddr, &length);
                
                		len = recv(sock_client, buff, 4095, 0);
                		 buff[len] = '\0';
                		printf("%s", buff);
                
                		send(sock_client, head, strlen(head), 0);
                		send(sock_client, html, strlen(html), 0);
                
                		closesocket(sock_client);
                	}
                
                
                
                	system("pause");
                
                	return 0;
                }
                

编译运行后，在浏览器中输入对应地址，即可看到服务器返回的响应页面。