实现一个简单的HTTP

实现简单HTTP服务器,在页面显示“hello world”:

socket套接字编程中服务端代码改编：

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void Usage() {
	printf("usage: ./server [ip] [port]\n");
}
int main(int argc, char* argv[]) {
	if (argc != 3) {
	Usage();
	return -1;
}
int fd = socket(AF_INET, SOCK_STREAM, 0);
//创建套接字
if (fd < 0) {
	perror("socket");
	return -1;
}
//struct 结构体：
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr(argv[1]);
addr.sin_port = htons(atoi(argv[2]));
//绑定地址信息
int ret = bind(fd, (struct sockaddr*)&addr, sizeof(addr));
if (ret < 0) {
	perror("bind");
	return -1;
}
//监听套接字
ret = listen(fd, 10);
if (ret < 0) {
	perror("listen");
	return 1;
}
while(1) {
	struct sockaddr_in client_addr;
	socklen_t len;
	//获取操作句柄
	int client_fd = accept(fd, (struct 	sockaddr*)&client_addr, &len);
	if (client_fd < 0) {
		perror("accept");
		continue;
	}
	char input_buf[1024 * 10] = {0}; 
	// 用一个足够大的缓冲区直接把数据读完.
	ssize_t read_size = read(client_fd, 	input_buf, sizeof(input_buf) - 1);
	if (read_size < 0) {
		return 1;
	}
	printf("[Request] %s", input_buf);
	char buf[1024] = {0};
	const char* hello = "<h1>hello world</h1>";
	sprintf(buf, "HTTP/1.0 200 OK\nContent-Length:%lu\n\n%s", strlen(hello), hello);
	write(client_fd, buf, strlen(buf));
	}
	return 0;
}