#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>int main(int argc, char* argv[])
{if (argc != 3){printf("usage: ./server ip port\n");return 1;}int fd = socket(AF_INET, SOCK_STREAM, 0);if (fd < 0){perror("socket");return 1;}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]));int ret = bind(fd, (struct sockaddr*)&addr, sizeof(addr));if (ret < 0){perror("bind");return 1;}ret = listen(fd, 10);if (ret < 0){perror("listen");return 1;}for (;;){struct sockaddr_in client_addr;socklen_t len = sizeof(client_addr);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]\n%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;
}
编译后启动服务,并在浏览器中输入 http://[ip]:[port]
注意:
1、此处我使用了 9090 端口号启动 HTTP 服务器,虽然 HTTP 服务器一般使用的是 80 端口,但这只是一个通用习惯,并不是说 HTTP 服务器就不能使用其他端口号
2、可以看到服务器打印出的报文中还有一个 GET /favicon.ico HTTP/1.1 这样的请求